Merge branch 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

* 'staging-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (466 commits)
  net/hyperv: Add support for jumbo frame up to 64KB
  net/hyperv: Add NETVSP protocol version negotiation
  net/hyperv: Remove unnecessary kmap_atomic in netvsc driver
  staging/rtl8192e: Register against lib80211
  staging/rtl8192e: Convert to lib80211_crypt_info
  staging/rtl8192e: Convert to lib80211_crypt_data and lib80211_crypt_ops
  staging/rtl8192e: Add lib80211.h to rtllib.h
  staging/mei: add watchdog device registration wrappers
  drm/omap: GEM, deal with cache
  staging: vt6656: int.c, int.h: Change return of function to void
  staging: usbip: removed unused definitions from header
  staging: usbip: removed dead code from receive function
  staging:iio: Drop {mark,unmark}_in_use callbacks
  staging:iio: Drop buffer mark_param_change callback
  staging:iio: Drop the unused buffer enable() and is_enabled() callbacks
  staging:iio: Drop buffer busy flag
  staging:iio: Make sure a device is only opened once at a time
  staging:iio: Disallow modifying buffer size when buffer is enabled
  staging:iio: Disallow changing scan elements in all buffered modes
  staging:iio: Use iio_buffer_enabled instead of open coding it
  ...

Fix up conflict in drivers/staging/iio/adc/ad799x_core.c (removal of
module_init due to using module_i2c_driver() helper, next to removal of
MODULE_ALIAS due to using MODULE_DEVICE_TABLE instead).

125 files changed, 3545 insertions, 1821 deletions

diff --git a/drivers/staging/iio/Documentation/generic_buffer.c b/drivers/staging/iio/Documentation/generic_buffer.c
index d5809532149..69a05b9456d 100644
--- a/drivers/staging/iio/Documentation/generic_buffer.c
+++ b/drivers/staging/iio/Documentation/generic_buffer.c
@@ -28,6 +28,7 @@
 #include <linux/types.h>
 #include <string.h>
 #include <poll.h>
+#include <endian.h>
 #include "iio_utils.h"
 
 /**
@@ -56,6 +57,13 @@ int size_from_channelarray(struct iio_channel_info *channels, int num_channels)
 
 void print2byte(int input, struct iio_channel_info *info)
 {
+	/* First swap if incorrect endian */
+
+	if (info->be)
+		input = be16toh((uint_16t)input);
+	else
+		input = le16toh((uint_16t)input);
+
 	/* shift before conversion to avoid sign extension
 	   of left aligned data */
 	input = input >> info->shift;
diff --git a/drivers/staging/iio/Documentation/iio_utils.h b/drivers/staging/iio/Documentation/iio_utils.h
index 75938b2412f..6f3a392297e 100644
--- a/drivers/staging/iio/Documentation/iio_utils.h
+++ b/drivers/staging/iio/Documentation/iio_utils.h
@@ -13,6 +13,7 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <stdint.h>
+#include <dirent.h>
 
 #define IIO_MAX_NAME_LENGTH 30
 
@@ -73,6 +74,7 @@ struct iio_channel_info {
 	unsigned bits_used;
 	unsigned shift;
 	uint64_t mask;
+	unsigned be;
 	unsigned is_signed;
 	unsigned enabled;
 	unsigned location;
@@ -83,6 +85,7 @@ struct iio_channel_info {
  * @is_signed: output whether channel is signed
  * @bytes: output how many bytes the channel storage occupies
  * @mask: output a bit mask for the raw data
+ * @be: big endian
  * @device_dir: the iio device directory
  * @name: the channel name
  * @generic_name: the channel type name
@@ -92,6 +95,7 @@ inline int iioutils_get_type(unsigned *is_signed,
 			     unsigned *bits_used,
 			     unsigned *shift,
 			     uint64_t *mask,
+			     unsigned *be,
 			     const char *device_dir,
 			     const char *name,
 			     const char *generic_name)
@@ -100,7 +104,7 @@ inline int iioutils_get_type(unsigned *is_signed,
 	int ret;
 	DIR *dp;
 	char *scan_el_dir, *builtname, *builtname_generic, *filename = 0;
-	char signchar;
+	char signchar, endianchar;
 	unsigned padint;
 	const struct dirent *ent;
 
@@ -144,9 +148,18 @@ inline int iioutils_get_type(unsigned *is_signed,
 				ret = -errno;
 				goto error_free_filename;
 			}
-			fscanf(sysfsfp,
-			       "%c%u/%u>>%u", &signchar, bits_used,
-			       &padint, shift);
+
+			ret = fscanf(sysfsfp,
+				     "%ce:%c%u/%u>>%u",
+				     &endianchar,
+				     &signchar,
+				     bits_used,
+				     &padint, shift);
+			if (ret < 0) {
+				printf("failed to pass scan type description\n");
+				return ret;
+			}
+			*be = (endianchar == 'b');
 			*bytes = padint / 8;
 			if (*bits_used == 64)
 				*mask = ~0;
@@ -156,6 +169,10 @@ inline int iioutils_get_type(unsigned *is_signed,
 				*is_signed = 1;
 			else
 				*is_signed = 0;
+			fclose(sysfsfp);
+			free(filename);
+
+			filename = 0;
 		}
 error_free_filename:
 	if (filename)
@@ -386,6 +403,7 @@ inline int build_channel_array(const char *device_dir,
 						&current->bits_used,
 						&current->shift,
 						&current->mask,
+						&current->be,
 						device_dir,
 						current->name,
 						current->generic_name);
diff --git a/drivers/staging/iio/Documentation/ring.txt b/drivers/staging/iio/Documentation/ring.txt
index 7e99ef2b7bc..e33807761cd 100644
--- a/drivers/staging/iio/Documentation/ring.txt
+++ b/drivers/staging/iio/Documentation/ring.txt
@@ -23,10 +23,6 @@ The function pointers within here are used to allow the core to handle
 as much buffer functionality as possible. Note almost all of these
 are optional.
 
-mark_in_use, unmark_in_use
-  Basically indicate that not changes should be made to the buffer state that
-  will effect the form of the data being captures (e.g. scan elements or length)
-
 store_to
   If possible, push data to the buffer.
 
@@ -39,8 +35,6 @@ rip_first_n
   The primary buffer reading function. Note that it may well not return
   as much data as requested.
 
-mark_param_changed
-  Used to indicate that something has changed. Used in conjunction with
 request_update
   If parameters have changed that require reinitialization or configuration of
   the buffer this will trigger it.
@@ -51,7 +45,3 @@ get_bytes_per_datum, set_bytes_per_datum
 get_length / set_length
   Get/set the number of complete scans that may be held by the buffer.
 
-is_enabled
-  Query if ring buffer is in use
-enable
-  Start the ring buffer.
diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio
index 0d6823d19b6..46a995d6d26 100644
--- a/drivers/staging/iio/Documentation/sysfs-bus-iio
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio
@@ -276,6 +276,16 @@ Description:
 		If a discrete set of scale values are available, they
 		are listed in this attribute.
 
+What:		/sys/.../in_accel_filter_low_pass_3db_frequency
+What:		/sys/.../in_magn_filter_low_pass_3db_frequency
+What:		/sys/.../in_anglvel_filter_low_pass_3db_frequency
+KernelVersion:	3.2
+Contact:	linux-iio@vger.kernel.org
+Description:
+		If a known or controllable low pass filter is applied
+		to the underlying data channel, then this parameter
+		gives the 3dB frequency of the filter in Hz.
+
 What:		/sys/bus/iio/devices/iio:deviceX/out_voltageY_raw
 KernelVersion:	2.6.37
 Contact:	linux-iio@vger.kernel.org
diff --git a/drivers/staging/iio/Kconfig b/drivers/staging/iio/Kconfig
index 4ec9118955f..90162aa8b2d 100644
--- a/drivers/staging/iio/Kconfig
+++ b/drivers/staging/iio/Kconfig
@@ -76,7 +76,6 @@ config IIO_DUMMY_EVGEN
 
 config IIO_SIMPLE_DUMMY
        tristate "An example driver with no hardware requirements"
-       select IIO_SIMPLE_DUMMY_EVGEN if IIO_SIMPLE_DUMMY_EVENTS
        help
 	 Driver intended mainly as documentation for how to write
 	 a driver. May also be useful for testing userspace code
diff --git a/drivers/staging/iio/accel/adis16201_core.c b/drivers/staging/iio/accel/adis16201_core.c
index 97f747eac64..d439e45d07f 100644
--- a/drivers/staging/iio/accel/adis16201_core.c
+++ b/drivers/staging/iio/accel/adis16201_core.c
@@ -17,7 +17,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "adis16201.h"
 
@@ -322,8 +322,7 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_VOLTAGE:
 			*val = 0;
@@ -348,10 +347,10 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
 			return -EINVAL;
 		}
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = 25;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		switch (chan->type) {
 		case IIO_ACCEL:
 			bits = 12;
@@ -388,7 +387,7 @@ static int adis16201_write_raw(struct iio_dev *indio_dev,
 	s16 val16;
 	u8 addr;
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		switch (chan->type) {
 		case IIO_ACCEL:
 			bits = 12;
@@ -408,36 +407,36 @@ static int adis16201_write_raw(struct iio_dev *indio_dev,
 
 static struct iio_chan_spec adis16201_channels[] = {
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "supply", 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_supply, ADIS16201_SCAN_SUPPLY,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		 IIO_CHAN_INFO_OFFSET_SEPARATE_BIT,
 		 temp, ADIS16201_SCAN_TEMP,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 accel_x, ADIS16201_SCAN_ACC_X,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 accel_y, ADIS16201_SCAN_ACC_Y,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_aux, ADIS16201_SCAN_AUX_ADC,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_X,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 incli_x, ADIS16201_SCAN_INCLI_X,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_Y,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 incli_y, ADIS16201_SCAN_INCLI_Y,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(7)
@@ -554,3 +553,4 @@ module_spi_driver(adis16201_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADIS16201 Programmable Digital Vibration Sensor driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16201");
diff --git a/drivers/staging/iio/accel/adis16201_ring.c b/drivers/staging/iio/accel/adis16201_ring.c
index 0016ed378e3..26c610faee3 100644
--- a/drivers/staging/iio/accel/adis16201_ring.c
+++ b/drivers/staging/iio/accel/adis16201_ring.c
@@ -74,11 +74,11 @@ static irqreturn_t adis16201_trigger_handler(int irq, void *p)
 		return -ENOMEM;
 	}
 
-	if (ring->scan_count)
-		if (adis16201_read_ring_data(indio_dev, st->rx) >= 0)
-			for (; i < ring->scan_count; i++)
-				data[i] = be16_to_cpup(
-					(__be16 *)&(st->rx[i*2]));
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)
+	    && adis16201_read_ring_data(indio_dev, st->rx) >= 0)
+		for (; i < bitmap_weight(indio_dev->active_scan_mask,
+					 indio_dev->masklength); i++)
+			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
 	/* Guaranteed to be aligned with 8 byte boundary */
 	if (ring->scan_timestamp)
@@ -116,11 +116,9 @@ int adis16201_configure_ring(struct iio_dev *indio_dev)
 	}
 	indio_dev->buffer = ring;
 	/* Effectively select the ring buffer implementation */
-	ring->bpe = 2;
 	ring->scan_timestamp = true;
 	ring->access = &ring_sw_access_funcs;
-	ring->setup_ops = &adis16201_ring_setup_ops;
-	ring->owner = THIS_MODULE;
+	indio_dev->setup_ops = &adis16201_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &adis16201_trigger_handler,
diff --git a/drivers/staging/iio/accel/adis16203_core.c b/drivers/staging/iio/accel/adis16203_core.c
index a6d6d27f3c9..1a5140f9e3f 100644
--- a/drivers/staging/iio/accel/adis16203_core.c
+++ b/drivers/staging/iio/accel/adis16203_core.c
@@ -17,7 +17,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "adis16203.h"
 
@@ -329,8 +329,7 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_VOLTAGE:
 			*val = 0;
@@ -350,10 +349,10 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
 		default:
 			return -EINVAL;
 		}
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = 25;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		bits = 14;
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16203_addresses[chan->address][1];
@@ -374,26 +373,26 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
 
 static struct iio_chan_spec adis16203_channels[] = {
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "supply", 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_supply, ADIS16203_SCAN_SUPPLY,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_aux, ADIS16203_SCAN_AUX_ADC,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_X,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 incli_x, ADIS16203_SCAN_INCLI_X,
 		 IIO_ST('s', 14, 16, 0), 0),
 	/* Fixme: Not what it appears to be - see data sheet */
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_Y,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 incli_y, ADIS16203_SCAN_INCLI_Y,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		 IIO_CHAN_INFO_OFFSET_SEPARATE_BIT,
 		 temp, ADIS16203_SCAN_TEMP,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(5),
@@ -509,3 +508,4 @@ module_spi_driver(adis16203_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADIS16203 Programmable Digital Vibration Sensor driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16203");
diff --git a/drivers/staging/iio/accel/adis16203_ring.c b/drivers/staging/iio/accel/adis16203_ring.c
index 1fdfe6f6ac6..064640d15e4 100644
--- a/drivers/staging/iio/accel/adis16203_ring.c
+++ b/drivers/staging/iio/accel/adis16203_ring.c
@@ -74,11 +74,11 @@ static irqreturn_t adis16203_trigger_handler(int irq, void *p)
 		return -ENOMEM;
 	}
 
-	if (ring->scan_count)
-		if (adis16203_read_ring_data(&indio_dev->dev, st->rx) >= 0)
-			for (; i < ring->scan_count; i++)
-				data[i] = be16_to_cpup(
-					(__be16 *)&(st->rx[i*2]));
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength) &&
+	    adis16203_read_ring_data(&indio_dev->dev, st->rx) >= 0)
+		for (; i < bitmap_weight(indio_dev->active_scan_mask,
+					 indio_dev->masklength); i++)
+			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
 	/* Guaranteed to be aligned with 8 byte boundary */
 	if (ring->scan_timestamp)
@@ -118,11 +118,9 @@ int adis16203_configure_ring(struct iio_dev *indio_dev)
 	}
 	indio_dev->buffer = ring;
 	/* Effectively select the ring buffer implementation */
-	ring->bpe = 2;
 	ring->scan_timestamp = true;
 	ring->access = &ring_sw_access_funcs;
-	ring->setup_ops = &adis16203_ring_setup_ops;
-	ring->owner = THIS_MODULE;
+	indio_dev->setup_ops = &adis16203_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &adis16203_trigger_handler,
diff --git a/drivers/staging/iio/accel/adis16204_core.c b/drivers/staging/iio/accel/adis16204_core.c
index 7ac5b4c533d..fa89364b841 100644
--- a/drivers/staging/iio/accel/adis16204_core.c
+++ b/drivers/staging/iio/accel/adis16204_core.c
@@ -20,7 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "adis16204.h"
 
@@ -366,7 +366,7 @@ static int adis16204_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_VOLTAGE:
 			*val = 0;
@@ -390,12 +390,12 @@ static int adis16204_read_raw(struct iio_dev *indio_dev,
 			return -EINVAL;
 		}
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = 25;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
-	case (1 << IIO_CHAN_INFO_PEAK_SEPARATE):
-		if (mask == (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE)) {
+	case IIO_CHAN_INFO_CALIBBIAS:
+	case IIO_CHAN_INFO_PEAK:
+		if (mask == IIO_CHAN_INFO_CALIBBIAS) {
 			bits = 12;
 			addrind = 1;
 		} else { /* PEAK_SEPARATE */
@@ -428,7 +428,7 @@ static int adis16204_write_raw(struct iio_dev *indio_dev,
 	s16 val16;
 	u8 addr;
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		switch (chan->type) {
 		case IIO_ACCEL:
 			bits = 12;
@@ -445,28 +445,28 @@ static int adis16204_write_raw(struct iio_dev *indio_dev,
 
 static struct iio_chan_spec adis16204_channels[] = {
 	IIO_CHAN(IIO_VOLTAGE, 0, 0, 0, "supply", 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_supply, ADIS16204_SCAN_SUPPLY,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_aux, ADIS16204_SCAN_AUX_ADC,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		 IIO_CHAN_INFO_OFFSET_SEPARATE_BIT,
 		 temp, ADIS16204_SCAN_TEMP,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_PEAK_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		 IIO_CHAN_INFO_PEAK_SEPARATE_BIT,
 		 accel_x, ADIS16204_SCAN_ACC_X,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_PEAK_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		 IIO_CHAN_INFO_PEAK_SEPARATE_BIT,
 		 accel_y, ADIS16204_SCAN_ACC_Y,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(5),
@@ -582,3 +582,4 @@ module_spi_driver(adis16204_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("ADIS16204 High-g Digital Impact Sensor and Recorder");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16204");
diff --git a/drivers/staging/iio/accel/adis16204_ring.c b/drivers/staging/iio/accel/adis16204_ring.c
index 6fd3d8f51f2..4081179dfa5 100644
--- a/drivers/staging/iio/accel/adis16204_ring.c
+++ b/drivers/staging/iio/accel/adis16204_ring.c
@@ -71,11 +71,11 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
 		return -ENOMEM;
 	}
 
-	if (ring->scan_count)
-		if (adis16204_read_ring_data(&indio_dev->dev, st->rx) >= 0)
-			for (; i < ring->scan_count; i++)
-				data[i] = be16_to_cpup(
-					(__be16 *)&(st->rx[i*2]));
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength) &&
+	    adis16204_read_ring_data(&indio_dev->dev, st->rx) >= 0)
+		for (; i < bitmap_weight(indio_dev->active_scan_mask,
+					 indio_dev->masklength); i++)
+			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
 	/* Guaranteed to be aligned with 8 byte boundary */
 	if (ring->scan_timestamp)
@@ -114,10 +114,8 @@ int adis16204_configure_ring(struct iio_dev *indio_dev)
 	indio_dev->buffer = ring;
 	/* Effectively select the ring buffer implementation */
 	ring->access = &ring_sw_access_funcs;
-	ring->bpe = 2;
 	ring->scan_timestamp = true;
-	ring->setup_ops = &adis16204_ring_setup_ops;
-	ring->owner = THIS_MODULE;
+	indio_dev->setup_ops = &adis16204_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &adis16204_trigger_handler,
diff --git a/drivers/staging/iio/accel/adis16209_core.c b/drivers/staging/iio/accel/adis16209_core.c
index c03afbf5bbd..a98715f6bd6 100644
--- a/drivers/staging/iio/accel/adis16209_core.c
+++ b/drivers/staging/iio/accel/adis16209_core.c
@@ -18,7 +18,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "adis16209.h"
 
@@ -304,7 +304,7 @@ static int adis16209_write_raw(struct iio_dev *indio_dev,
 	s16 val16;
 	u8 addr;
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		switch (chan->type) {
 		case IIO_ACCEL:
 		case IIO_INCLI:
@@ -355,8 +355,7 @@ static int adis16209_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_VOLTAGE:
 			*val = 0;
@@ -381,10 +380,10 @@ static int adis16209_read_raw(struct iio_dev *indio_dev,
 			return -EINVAL;
 		}
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = 25;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		switch (chan->type) {
 		case IIO_ACCEL:
 			bits = 14;
@@ -410,34 +409,34 @@ static int adis16209_read_raw(struct iio_dev *indio_dev,
 
 static struct iio_chan_spec adis16209_channels[] = {
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_supply, ADIS16209_SCAN_SUPPLY,
 		 IIO_ST('u', 14, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
-		 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		 IIO_CHAN_INFO_OFFSET_SEPARATE_BIT,
 		 temp, ADIS16209_SCAN_TEMP,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 accel_x, ADIS16209_SCAN_ACC_X,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 accel_y, ADIS16209_SCAN_ACC_Y,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_aux, ADIS16209_SCAN_AUX_ADC,
 		 IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_X,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 incli_x, ADIS16209_SCAN_INCLI_X,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_Y,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 incli_y, ADIS16209_SCAN_INCLI_Y,
 		 IIO_ST('s', 14, 16, 0), 0),
 	IIO_CHAN(IIO_ROT, 0, 1, 0, NULL, 0, IIO_MOD_X,
@@ -558,3 +557,4 @@ module_spi_driver(adis16209_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADIS16209 Digital Vibration Sensor driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16209");
diff --git a/drivers/staging/iio/accel/adis16209_ring.c b/drivers/staging/iio/accel/adis16209_ring.c
index d17e39d9545..2a6fd334f5f 100644
--- a/drivers/staging/iio/accel/adis16209_ring.c
+++ b/drivers/staging/iio/accel/adis16209_ring.c
@@ -72,9 +72,10 @@ static irqreturn_t adis16209_trigger_handler(int irq, void *p)
 		return -ENOMEM;
 	}
 
-	if (ring->scan_count &&
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength) &&
 	    adis16209_read_ring_data(&indio_dev->dev, st->rx) >= 0)
-		for (; i < ring->scan_count; i++)
+		for (; i < bitmap_weight(indio_dev->active_scan_mask,
+					 indio_dev->masklength); i++)
 			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
 	/* Guaranteed to be aligned with 8 byte boundary */
@@ -114,10 +115,8 @@ int adis16209_configure_ring(struct iio_dev *indio_dev)
 	indio_dev->buffer = ring;
 	/* Effectively select the ring buffer implementation */
 	ring->access = &ring_sw_access_funcs;
-	ring->bpe = 2;
 	ring->scan_timestamp = true;
-	ring->setup_ops = &adis16209_ring_setup_ops;
-	ring->owner = THIS_MODULE;
+	indio_dev->setup_ops = &adis16209_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &adis16209_trigger_handler,
diff --git a/drivers/staging/iio/accel/adis16220_core.c b/drivers/staging/iio/accel/adis16220_core.c
index 73298e7849e..51a852d4548 100644
--- a/drivers/staging/iio/accel/adis16220_core.c
+++ b/drivers/staging/iio/accel/adis16220_core.c
@@ -167,9 +167,9 @@ static ssize_t adis16220_write_16bit(struct device *dev,
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret;
-	long val;
+	u16 val;
 
-	ret = strict_strtol(buf, 10, &val);
+	ret = kstrtou16(buf, 10, &val);
 	if (ret)
 		goto error_ret;
 	ret = adis16220_spi_write_reg_16(indio_dev, this_attr->address, val);
@@ -510,17 +510,17 @@ static int adis16220_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		addrind = 0;
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		if (chan->type == IIO_TEMP) {
 			*val = 25;
 			return IIO_VAL_INT;
 		}
 		addrind = 1;
 		break;
-	case (1 << IIO_CHAN_INFO_PEAK_SEPARATE):
+	case IIO_CHAN_INFO_PEAK:
 		addrind = 2;
 		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
 		switch (chan->type) {
 		case IIO_TEMP:
@@ -575,27 +575,27 @@ static const struct iio_chan_spec adis16220_channels[] = {
 		.indexed = 1,
 		.channel = 0,
 		.extend_name = "supply",
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_supply,
 	}, {
 		.type = IIO_ACCEL,
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-			     (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |
-			     (1 << IIO_CHAN_INFO_PEAK_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+			     IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+			     IIO_CHAN_INFO_PEAK_SEPARATE_BIT,
 		.address = accel,
 	}, {
 		.type = IIO_TEMP,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-			     (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+			     IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = temp,
 	}, {
 		.type = IIO_VOLTAGE,
 		.indexed = 1,
 		.channel = 1,
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-			     (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+			     IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_1,
 	}, {
 		.type = IIO_VOLTAGE,
@@ -713,3 +713,4 @@ module_spi_driver(adis16220_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADIS16220 Digital Vibration Sensor");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16220");
diff --git a/drivers/staging/iio/accel/adis16240_core.c b/drivers/staging/iio/accel/adis16240_core.c
index 88881b9919e..17f77fef7f2 100644
--- a/drivers/staging/iio/accel/adis16240_core.c
+++ b/drivers/staging/iio/accel/adis16240_core.c
@@ -21,7 +21,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "adis16240.h"
 
@@ -389,8 +389,7 @@ static int adis16240_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_VOLTAGE:
 			*val = 0;
@@ -411,14 +410,14 @@ static int adis16240_read_raw(struct iio_dev *indio_dev,
 			return -EINVAL;
 		}
 		break;
-	case (1 << IIO_CHAN_INFO_PEAK_SCALE_SHARED):
+	case IIO_CHAN_INFO_PEAK_SCALE:
 		*val = 6;
 		*val2 = 629295;
 		return IIO_VAL_INT_PLUS_MICRO;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = 25;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		bits = 10;
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16240_addresses[chan->address][1];
@@ -432,7 +431,7 @@ static int adis16240_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_PEAK_SEPARATE):
+	case IIO_CHAN_INFO_PEAK:
 		bits = 10;
 		mutex_lock(&indio_dev->mlock);
 		addr = adis16240_addresses[chan->address][2];
@@ -460,7 +459,7 @@ static int adis16240_write_raw(struct iio_dev *indio_dev,
 	s16 val16;
 	u8 addr;
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		val16 = val & ((1 << bits) - 1);
 		addr = adis16240_addresses[chan->address][1];
 		return adis16240_spi_write_reg_16(indio_dev, addr, val16);
@@ -470,7 +469,7 @@ static int adis16240_write_raw(struct iio_dev *indio_dev,
 
 static struct iio_chan_spec adis16240_channels[] = {
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "supply", 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 in_supply, ADIS16240_SCAN_SUPPLY,
 		 IIO_ST('u', 10, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0,
@@ -478,22 +477,22 @@ static struct iio_chan_spec adis16240_channels[] = {
 		 in_aux, ADIS16240_SCAN_AUX_ADC,
 		 IIO_ST('u', 10, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 accel_x, ADIS16240_SCAN_ACC_X,
 		 IIO_ST('s', 10, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 accel_y, ADIS16240_SCAN_ACC_Y,
 		 IIO_ST('s', 10, 16, 0), 0),
 	IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Z,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED) |
-		 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		 accel_z, ADIS16240_SCAN_ACC_Z,
 		 IIO_ST('s', 10, 16, 0), 0),
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 temp, ADIS16240_SCAN_TEMP,
 		 IIO_ST('u', 10, 16, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(6)
@@ -611,3 +610,4 @@ module_spi_driver(adis16240_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices Programmable Impact Sensor and Recorder");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16240");
diff --git a/drivers/staging/iio/accel/adis16240_ring.c b/drivers/staging/iio/accel/adis16240_ring.c
index b907ca3f4fd..e23622d96f9 100644
--- a/drivers/staging/iio/accel/adis16240_ring.c
+++ b/drivers/staging/iio/accel/adis16240_ring.c
@@ -69,9 +69,10 @@ static irqreturn_t adis16240_trigger_handler(int irq, void *p)
 		return -ENOMEM;
 	}
 
-	if (ring->scan_count &&
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength) &&
 	    adis16240_read_ring_data(&indio_dev->dev, st->rx) >= 0)
-		for (; i < ring->scan_count; i++)
+		for (; i < bitmap_weight(indio_dev->active_scan_mask,
+					 indio_dev->masklength); i++)
 			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
 	/* Guaranteed to be aligned with 8 byte boundary */
@@ -111,10 +112,8 @@ int adis16240_configure_ring(struct iio_dev *indio_dev)
 	indio_dev->buffer = ring;
 	/* Effectively select the ring buffer implementation */
 	ring->access = &ring_sw_access_funcs;
-	ring->bpe = 2;
 	ring->scan_timestamp = true;
-	ring->setup_ops = &adis16240_ring_setup_ops;
-	ring->owner = THIS_MODULE;
+	indio_dev->setup_ops = &adis16240_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &adis16240_trigger_handler,
diff --git a/drivers/staging/iio/accel/kxsd9.c b/drivers/staging/iio/accel/kxsd9.c
index cfce21c2edd..d13d7215ff6 100644
--- a/drivers/staging/iio/accel/kxsd9.c
+++ b/drivers/staging/iio/accel/kxsd9.c
@@ -140,7 +140,7 @@ static int kxsd9_write_raw(struct iio_dev *indio_dev,
 {
 	int ret = -EINVAL;
 
-	if (mask == (1 << IIO_CHAN_INFO_SCALE_SHARED)) {
+	if (mask == IIO_CHAN_INFO_SCALE) {
 		/* Check no integer component */
 		if (val)
 			return -EINVAL;
@@ -164,7 +164,7 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev,
 			goto error_ret;
 		*val = ret;
 		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
 		if (ret)
 			goto error_ret;
@@ -181,7 +181,7 @@ error_ret:
 		.type = IIO_ACCEL,					\
 		.modified = 1,						\
 		.channel2 = IIO_MOD_##axis,				\
-		.info_mask = 1 << IIO_CHAN_INFO_SCALE_SHARED,		\
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,		\
 		.address = KXSD9_REG_##axis,				\
 	}
 
@@ -268,8 +268,10 @@ static int __devexit kxsd9_remove(struct spi_device *spi)
 }
 
 static const struct spi_device_id kxsd9_id[] = {
-	{"kxsd9", 0}
+	{"kxsd9", 0},
+	{ },
 };
+MODULE_DEVICE_TABLE(spi, kxsd9_id);
 
 static struct spi_driver kxsd9_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/accel/lis3l02dq.h b/drivers/staging/iio/accel/lis3l02dq.h
index 7237a9ab61a..2db383fc274 100644
--- a/drivers/staging/iio/accel/lis3l02dq.h
+++ b/drivers/staging/iio/accel/lis3l02dq.h
@@ -181,11 +181,6 @@ int lis3l02dq_disable_all_events(struct iio_dev *indio_dev);
 void lis3l02dq_remove_trigger(struct iio_dev *indio_dev);
 int lis3l02dq_probe_trigger(struct iio_dev *indio_dev);
 
-ssize_t lis3l02dq_read_accel_from_buffer(struct iio_buffer *buffer,
-				       int index,
-				       int *val);
-
-
 int lis3l02dq_configure_buffer(struct iio_dev *indio_dev);
 void lis3l02dq_unconfigure_buffer(struct iio_dev *indio_dev);
 
@@ -212,13 +207,6 @@ static inline int lis3l02dq_probe_trigger(struct iio_dev *indio_dev)
 {
 	return 0;
 }
-static inline ssize_t
-lis3l02dq_read_accel_from_buffer(struct iio_buffer *buffer,
-				 int index,
-				 int *val)
-{
-	return 0;
-}
 
 static int lis3l02dq_configure_buffer(struct iio_dev *indio_dev)
 {
diff --git a/drivers/staging/iio/accel/lis3l02dq_core.c b/drivers/staging/iio/accel/lis3l02dq_core.c
index 6877521ec17..376da513796 100644
--- a/drivers/staging/iio/accel/lis3l02dq_core.c
+++ b/drivers/staging/iio/accel/lis3l02dq_core.c
@@ -25,7 +25,8 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../events.h"
+#include "../buffer.h"
 
 #include "lis3l02dq.h"
 
@@ -226,14 +227,14 @@ static int lis3l02dq_write_raw(struct iio_dev *indio_dev,
 	u8 uval;
 	s8 sval;
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		if (val > 255 || val < -256)
 			return -EINVAL;
 		sval = val;
 		reg = lis3l02dq_axis_map[LIS3L02DQ_BIAS][chan->address];
 		ret = lis3l02dq_spi_write_reg_8(indio_dev, reg, sval);
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		if (val & ~0xFF)
 			return -EINVAL;
 		uval = val;
@@ -259,23 +260,20 @@ static int lis3l02dq_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		/* Take the iio_dev status lock */
 		mutex_lock(&indio_dev->mlock);
-		if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
-			ret = lis3l02dq_read_accel_from_buffer(indio_dev->
-							       buffer,
-							       chan->scan_index,
-							       val);
-		else {
+		if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
+			ret = -EBUSY;
+		} else {
 			reg = lis3l02dq_axis_map
 				[LIS3L02DQ_ACCEL][chan->address];
 			ret = lis3l02dq_read_reg_s16(indio_dev, reg, val);
 		}
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
 		*val2 = 9580;
 		return IIO_VAL_INT_PLUS_MICRO;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		reg = lis3l02dq_axis_map[LIS3L02DQ_GAIN][chan->address];
 		ret = lis3l02dq_spi_read_reg_8(indio_dev, reg, &utemp);
 		if (ret)
@@ -284,7 +282,7 @@ static int lis3l02dq_read_raw(struct iio_dev *indio_dev,
 		*val = utemp;
 		return IIO_VAL_INT;
 
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		reg = lis3l02dq_axis_map[LIS3L02DQ_BIAS][chan->address];
 		ret = lis3l02dq_spi_read_reg_8(indio_dev, reg, (u8 *)&stemp);
 		/* to match with what previous code does */
@@ -331,11 +329,11 @@ static ssize_t lis3l02dq_write_frequency(struct device *dev,
 					 size_t len)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	long val;
+	unsigned long val;
 	int ret;
 	u8 t;
 
-	ret = strict_strtol(buf, 10, &val);
+	ret = kstrtoul(buf, 10, &val);
 	if (ret)
 		return ret;
 
@@ -515,9 +513,9 @@ static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
 }
 
 #define LIS3L02DQ_INFO_MASK				\
-	((1 << IIO_CHAN_INFO_SCALE_SHARED) |		\
-	 (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |	\
-	 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE))
+	(IIO_CHAN_INFO_SCALE_SHARED_BIT |		\
+	 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |	\
+	 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT)
 
 #define LIS3L02DQ_EVENT_MASK					\
 	(IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) |	\
@@ -534,7 +532,7 @@ static struct iio_chan_spec lis3l02dq_channels[] = {
 };
 
 
-static ssize_t lis3l02dq_read_event_config(struct iio_dev *indio_dev,
+static int lis3l02dq_read_event_config(struct iio_dev *indio_dev,
 					   u64 event_code)
 {
 
@@ -809,3 +807,4 @@ module_spi_driver(lis3l02dq_driver);
 MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>");
 MODULE_DESCRIPTION("ST LIS3L02DQ Accelerometer SPI driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:lis3l02dq");
diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c
index 89527af8f4c..98c5c92d345 100644
--- a/drivers/staging/iio/accel/lis3l02dq_ring.c
+++ b/drivers/staging/iio/accel/lis3l02dq_ring.c
@@ -38,38 +38,6 @@ irqreturn_t lis3l02dq_data_rdy_trig_poll(int irq, void *private)
 		return IRQ_WAKE_THREAD;
 }
 
-/**
- * lis3l02dq_read_accel_from_buffer() individual acceleration read from buffer
- **/
-ssize_t lis3l02dq_read_accel_from_buffer(struct iio_buffer *buffer,
-					 int index,
-					 int *val)
-{
-	int ret;
-	s16 *data;
-
-	if (!iio_scan_mask_query(buffer, index))
-		return -EINVAL;
-
-	if (!buffer->access->read_last)
-		return -EBUSY;
-
-	data = kmalloc(buffer->access->get_bytes_per_datum(buffer),
-		       GFP_KERNEL);
-	if (data == NULL)
-		return -ENOMEM;
-
-	ret = buffer->access->read_last(buffer, (u8 *)data);
-	if (ret)
-		goto error_free_data;
-	*val = data[bitmap_weight(buffer->scan_mask, index)];
-error_free_data:
-
-	kfree(data);
-
-	return ret;
-}
-
 static const u8 read_all_tx_array[] = {
 	LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_X_L_ADDR), 0,
 	LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_X_H_ADDR), 0,
@@ -87,21 +55,21 @@ static const u8 read_all_tx_array[] = {
  **/
 static int lis3l02dq_read_all(struct iio_dev *indio_dev, u8 *rx_array)
 {
-	struct iio_buffer *buffer = indio_dev->buffer;
 	struct lis3l02dq_state *st = iio_priv(indio_dev);
 	struct spi_transfer *xfers;
 	struct spi_message msg;
 	int ret, i, j = 0;
 
-	xfers = kzalloc((buffer->scan_count) * 2
-			* sizeof(*xfers), GFP_KERNEL);
+	xfers = kcalloc(bitmap_weight(indio_dev->active_scan_mask,
+				      indio_dev->masklength) * 2,
+			sizeof(*xfers), GFP_KERNEL);
 	if (!xfers)
 		return -ENOMEM;
 
 	mutex_lock(&st->buf_lock);
 
 	for (i = 0; i < ARRAY_SIZE(read_all_tx_array)/4; i++)
-		if (test_bit(i, buffer->scan_mask)) {
+		if (test_bit(i, indio_dev->active_scan_mask)) {
 			/* lower byte */
 			xfers[j].tx_buf = st->tx + 2*j;
 			st->tx[2*j] = read_all_tx_array[i*4];
@@ -129,7 +97,8 @@ static int lis3l02dq_read_all(struct iio_dev *indio_dev, u8 *rx_array)
 	 * values in alternate bytes
 	 */
 	spi_message_init(&msg);
-	for (j = 0; j < buffer->scan_count * 2; j++)
+	for (j = 0; j < bitmap_weight(indio_dev->active_scan_mask,
+				      indio_dev->masklength) * 2; j++)
 		spi_message_add_tail(&xfers[j], &msg);
 
 	ret = spi_sync(st->us, &msg);
@@ -145,14 +114,16 @@ static int lis3l02dq_get_buffer_element(struct iio_dev *indio_dev,
 	int ret, i;
 	u8 *rx_array ;
 	s16 *data = (s16 *)buf;
+	int scan_count = bitmap_weight(indio_dev->active_scan_mask,
+				       indio_dev->masklength);
 
-	rx_array = kzalloc(4 * (indio_dev->buffer->scan_count), GFP_KERNEL);
+	rx_array = kzalloc(4 * scan_count, GFP_KERNEL);
 	if (rx_array == NULL)
 		return -ENOMEM;
 	ret = lis3l02dq_read_all(indio_dev, rx_array);
 	if (ret < 0)
 		return ret;
-	for (i = 0; i < indio_dev->buffer->scan_count; i++)
+	for (i = 0; i < scan_count; i++)
 		data[i] = combine_8_to_16(rx_array[i*4+1],
 					rx_array[i*4+3]);
 	kfree(rx_array);
@@ -175,7 +146,7 @@ static irqreturn_t lis3l02dq_trigger_handler(int irq, void *p)
 		return -ENOMEM;
 	}
 
-	if (buffer->scan_count)
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		len = lis3l02dq_get_buffer_element(indio_dev, data);
 
 	  /* Guaranteed to be aligned with 8 byte boundary */
@@ -363,17 +334,17 @@ static int lis3l02dq_buffer_postenable(struct iio_dev *indio_dev)
 	if (ret)
 		goto error_ret;
 
-	if (iio_scan_mask_query(indio_dev->buffer, 0)) {
+	if (test_bit(0, indio_dev->active_scan_mask)) {
 		t |= LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE;
 		oneenabled = true;
 	} else
 		t &= ~LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE;
-	if (iio_scan_mask_query(indio_dev->buffer, 1)) {
+	if (test_bit(1, indio_dev->active_scan_mask)) {
 		t |= LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE;
 		oneenabled = true;
 	} else
 		t &= ~LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE;
-	if (iio_scan_mask_query(indio_dev->buffer, 2)) {
+	if (test_bit(2, indio_dev->active_scan_mask)) {
 		t |= LIS3L02DQ_REG_CTRL_1_AXES_Z_ENABLE;
 		oneenabled = true;
 	} else
@@ -437,11 +408,9 @@ int lis3l02dq_configure_buffer(struct iio_dev *indio_dev)
 	indio_dev->buffer = buffer;
 	/* Effectively select the buffer implementation */
 	indio_dev->buffer->access = &lis3l02dq_access_funcs;
-	buffer->bpe = 2;
 
 	buffer->scan_timestamp = true;
-	buffer->setup_ops = &lis3l02dq_buffer_setup_ops;
-	buffer->owner = THIS_MODULE;
+	indio_dev->setup_ops = &lis3l02dq_buffer_setup_ops;
 
 	/* Functions are NULL as we set handler below */
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c
index 6c359074a06..49764fb7181 100644
--- a/drivers/staging/iio/accel/sca3000_core.c
+++ b/drivers/staging/iio/accel/sca3000_core.c
@@ -20,7 +20,8 @@
 #include <linux/module.h>
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../events.h"
+#include "../buffer.h"
 
 #include "sca3000.h"
 
@@ -381,13 +382,17 @@ sca3000_store_measurement_mode(struct device *dev,
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct sca3000_state *st = iio_priv(indio_dev);
 	int ret;
-	int mask = 0x03;
-	long val;
+	u8 mask = 0x03;
+	u8 val;
 
 	mutex_lock(&st->lock);
-	ret = strict_strtol(buf, 10, &val);
+	ret = kstrtou8(buf, 10, &val);
 	if (ret)
 		goto error_ret;
+	if (val > 3) {
+		ret = -EINVAL;
+		goto error_ret;
+	}
 	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
 	if (ret)
 		goto error_ret;
@@ -424,7 +429,7 @@ static IIO_DEVICE_ATTR(measurement_mode, S_IRUGO | S_IWUSR,
 static IIO_DEVICE_ATTR(revision, S_IRUGO, sca3000_show_rev, NULL, 0);
 
 #define SCA3000_INFO_MASK			\
-	(1 << IIO_CHAN_INFO_SCALE_SHARED)
+	IIO_CHAN_INFO_SCALE_SHARED_BIT
 #define SCA3000_EVENT_MASK					\
 	(IIO_EV_BIT(IIO_EV_TYPE_MAG, IIO_EV_DIR_RISING))
 
@@ -474,7 +479,7 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
 			(sizeof(*val)*8 - 13);
 		mutex_unlock(&st->lock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
 		if (chan->type == IIO_ACCEL)
 			*val2 = st->info->scale;
@@ -1161,9 +1166,9 @@ static int __devinit sca3000_probe(struct spi_device *spi)
 	if (ret < 0)
 		goto error_unregister_dev;
 	if (indio_dev->buffer) {
-		iio_scan_mask_set(indio_dev->buffer, 0);
-		iio_scan_mask_set(indio_dev->buffer, 1);
-		iio_scan_mask_set(indio_dev->buffer, 2);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer, 0);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer, 1);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer, 2);
 	}
 
 	if (spi->irq) {
@@ -1240,6 +1245,7 @@ static const struct spi_device_id sca3000_id[] = {
 	{"sca3000_e05", e05},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, sca3000_id);
 
 static struct spi_driver sca3000_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c
index 4a9a01dccd0..6b824a11f7f 100644
--- a/drivers/staging/iio/accel/sca3000_ring.c
+++ b/drivers/staging/iio/accel/sca3000_ring.c
@@ -20,7 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_hw.h"
 #include "sca3000.h"
 
@@ -146,7 +146,6 @@ static int sca3000_ring_get_bytes_per_datum(struct iio_buffer *r)
 }
 
 static IIO_BUFFER_ENABLE_ATTR;
-static IIO_BUFFER_BYTES_PER_DATUM_ATTR;
 static IIO_BUFFER_LENGTH_ATTR;
 
 /**
@@ -158,8 +157,7 @@ static ssize_t sca3000_query_ring_int(struct device *dev,
 {
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret, val;
-	struct iio_buffer *ring = dev_get_drvdata(dev);
-	struct iio_dev *indio_dev = ring->indio_dev;
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct sca3000_state *st = iio_priv(indio_dev);
 
 	mutex_lock(&st->lock);
@@ -180,8 +178,7 @@ static ssize_t sca3000_set_ring_int(struct device *dev,
 				      const char *buf,
 				      size_t len)
 {
-	struct iio_buffer *ring = dev_get_drvdata(dev);
-	struct iio_dev *indio_dev = ring->indio_dev;
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct sca3000_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	long val;
@@ -222,8 +219,7 @@ static ssize_t sca3000_show_buffer_scale(struct device *dev,
 					 struct device_attribute *attr,
 					 char *buf)
 {
-	struct iio_buffer *ring = dev_get_drvdata(dev);
-	struct iio_dev *indio_dev = ring->indio_dev;
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct sca3000_state *st = iio_priv(indio_dev);
 
 	return sprintf(buf, "0.%06d\n", 4*st->info->scale);
@@ -243,7 +239,6 @@ static IIO_DEVICE_ATTR(in_accel_scale,
  */
 static struct attribute *sca3000_ring_attributes[] = {
 	&dev_attr_length.attr,
-	&dev_attr_bytes_per_datum.attr,
 	&dev_attr_enable.attr,
 	&iio_dev_attr_50_percent.dev_attr.attr,
 	&iio_dev_attr_75_percent.dev_attr.attr,
@@ -269,7 +264,7 @@ static struct iio_buffer *sca3000_rb_allocate(struct iio_dev *indio_dev)
 	buf = &ring->buf;
 	buf->stufftoread = 0;
 	buf->attrs = &sca3000_ring_attr;
-	iio_buffer_init(buf, indio_dev);
+	iio_buffer_init(buf);
 
 	return buf;
 }
@@ -350,7 +345,7 @@ static const struct iio_buffer_setup_ops sca3000_ring_setup_ops = {
 
 void sca3000_register_ring_funcs(struct iio_dev *indio_dev)
 {
-	indio_dev->buffer->setup_ops = &sca3000_ring_setup_ops;
+	indio_dev->setup_ops = &sca3000_ring_setup_ops;
 }
 
 /**
diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c
index 797e65cd03e..45f4504ed92 100644
--- a/drivers/staging/iio/adc/ad7192.c
+++ b/drivers/staging/iio/adc/ad7192.c
@@ -19,7 +19,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger.h"
 #include "../trigger_consumer.h"
@@ -453,25 +453,6 @@ out:
 	return ret;
 }
 
-static int ad7192_scan_from_ring(struct ad7192_state *st, unsigned ch, int *val)
-{
-	struct iio_buffer *ring = iio_priv_to_dev(st)->buffer;
-	int ret;
-	s64 dat64[2];
-	u32 *dat32 = (u32 *)dat64;
-
-	if (!(test_bit(ch, ring->scan_mask)))
-		return  -EBUSY;
-
-	ret = ring->access->read_last(ring, (u8 *) &dat64);
-	if (ret)
-		return ret;
-
-	*val = *dat32;
-
-	return 0;
-}
-
 static int ad7192_ring_preenable(struct iio_dev *indio_dev)
 {
 	struct ad7192_state *st = iio_priv(indio_dev);
@@ -479,12 +460,14 @@ static int ad7192_ring_preenable(struct iio_dev *indio_dev)
 	size_t d_size;
 	unsigned channel;
 
-	if (!ring->scan_count)
+	if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		return -EINVAL;
 
-	channel = find_first_bit(ring->scan_mask, indio_dev->masklength);
+	channel = find_first_bit(indio_dev->active_scan_mask,
+				 indio_dev->masklength);
 
-	d_size = ring->scan_count *
+	d_size = bitmap_weight(indio_dev->active_scan_mask,
+			       indio_dev->masklength) *
 		 indio_dev->channels[0].scan_type.storagebits / 8;
 
 	if (ring->scan_timestamp) {
@@ -544,7 +527,7 @@ static irqreturn_t ad7192_trigger_handler(int irq, void *p)
 	s64 dat64[2];
 	s32 *dat32 = (s32 *)dat64;
 
-	if (ring->scan_count)
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		__ad7192_read_reg(st, 1, 1, AD7192_REG_DATA,
 				  dat32,
 				  indio_dev->channels[0].scan_type.realbits/8);
@@ -592,7 +575,7 @@ static int ad7192_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	}
 
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &ad7192_ring_setup_ops;
+	indio_dev->setup_ops = &ad7192_ring_setup_ops;
 
 	/* Flag that polled ring buffering is possible */
 	indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
@@ -626,6 +609,10 @@ static irqreturn_t ad7192_data_rdy_trig_poll(int irq, void *private)
 	return IRQ_HANDLED;
 }
 
+static struct iio_trigger_ops ad7192_trigger_ops = {
+	.owner = THIS_MODULE,
+};
+
 static int ad7192_probe_trigger(struct iio_dev *indio_dev)
 {
 	struct ad7192_state *st = iio_priv(indio_dev);
@@ -638,7 +625,7 @@ static int ad7192_probe_trigger(struct iio_dev *indio_dev)
 		ret = -ENOMEM;
 		goto error_ret;
 	}
-
+	st->trig->ops = &ad7192_trigger_ops;
 	ret = request_irq(st->spi->irq,
 			  ad7192_data_rdy_trig_poll,
 			  IRQF_TRIGGER_LOW,
@@ -650,7 +637,6 @@ static int ad7192_probe_trigger(struct iio_dev *indio_dev)
 	disable_irq_nosync(st->spi->irq);
 	st->irq_dis = true;
 	st->trig->dev.parent = &st->spi->dev;
-	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = indio_dev;
 
 	ret = iio_trigger_register(st->trig);
@@ -795,7 +781,7 @@ static ssize_t ad7192_set(struct device *dev,
 		return -EBUSY;
 	}
 
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD7192_REG_GPOCON:
 		if (val)
 			st->gpocon |= AD7192_GPOCON_BPDSW;
@@ -873,8 +859,7 @@ static int ad7192_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		mutex_lock(&indio_dev->mlock);
 		if (iio_buffer_enabled(indio_dev))
-			ret = ad7192_scan_from_ring(st,
-					chan->scan_index, &smpl);
+			ret = -EBUSY;
 		else
 			ret = ad7192_read(st, chan->address,
 					chan->scan_type.realbits / 8, &smpl);
@@ -901,18 +886,20 @@ static int ad7192_read_raw(struct iio_dev *indio_dev,
 		}
 		return IIO_VAL_INT;
 
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
-		mutex_lock(&indio_dev->mlock);
-		*val = st->scale_avail[AD7192_CONF_GAIN(st->conf)][0];
-		*val2 = st->scale_avail[AD7192_CONF_GAIN(st->conf)][1];
-		mutex_unlock(&indio_dev->mlock);
-
-		return IIO_VAL_INT_PLUS_NANO;
-
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-		*val =  1000;
-
-		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_VOLTAGE:
+			mutex_lock(&indio_dev->mlock);
+			*val = st->scale_avail[AD7192_CONF_GAIN(st->conf)][0];
+			*val2 = st->scale_avail[AD7192_CONF_GAIN(st->conf)][1];
+			mutex_unlock(&indio_dev->mlock);
+			return IIO_VAL_INT_PLUS_NANO;
+		case IIO_TEMP:
+			*val =  1000;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
 	}
 
 	return -EINVAL;
@@ -935,7 +922,7 @@ static int ad7192_write_raw(struct iio_dev *indio_dev,
 	}
 
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		ret = -EINVAL;
 		for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
 			if (val2 == st->scale_avail[i][1]) {
@@ -992,7 +979,7 @@ static const struct iio_info ad7192_info = {
 	  .extend_name = _name,						\
 	  .channel = _chan,						\
 	  .channel2 = _chan2,						\
-	  .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),		\
+	  .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,		\
 	  .address = _address,						\
 	  .scan_index = _si,						\
 	  .scan_type =  IIO_ST('s', 24, 32, 0)}
@@ -1001,7 +988,7 @@ static const struct iio_info ad7192_info = {
 	{ .type = IIO_VOLTAGE,						\
 	  .indexed = 1,							\
 	  .channel = _chan,						\
-	  .info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),		\
+	  .info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,		\
 	  .address = _address,						\
 	  .scan_index = _si,						\
 	  .scan_type =  IIO_ST('s', 24, 32, 0)}
@@ -1010,7 +997,7 @@ static const struct iio_info ad7192_info = {
 	{ .type = IIO_TEMP,						\
 	  .indexed = 1,							\
 	  .channel = _chan,						\
-	  .info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),		\
+	  .info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,		\
 	  .address = _address,						\
 	  .scan_index = _si,						\
 	  .scan_type =  IIO_ST('s', 24, 32, 0)}
@@ -1151,6 +1138,7 @@ static const struct spi_device_id ad7192_id[] = {
 	{"ad7195", ID_AD7195},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7192_id);
 
 static struct spi_driver ad7192_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index dbaeae81e87..7dbd6812c24 100644
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -18,6 +18,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../events.h"
 
 #include "ad7280a.h"
 
@@ -455,10 +456,10 @@ static ssize_t ad7280_store_balance_timer(struct device *dev,
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct ad7280_state *st = iio_priv(indio_dev);
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-	long val;
+	unsigned long val;
 	int ret;
 
-	ret = strict_strtoul(buf, 10, &val);
+	ret = kstrtoul(buf, 10, &val);
 	if (ret)
 		return ret;
 
@@ -487,8 +488,8 @@ static int ad7280_channel_init(struct ad7280_state *st)
 {
 	int dev, ch, cnt;
 
-	st->channels = kzalloc(sizeof(*st->channels) *
-				((st->slave_num + 1) * 12 + 2), GFP_KERNEL);
+	st->channels = kcalloc((st->slave_num + 1) * 12 + 2,
+			       sizeof(*st->channels), GFP_KERNEL);
 	if (st->channels == NULL)
 		return -ENOMEM;
 
@@ -507,7 +508,7 @@ static int ad7280_channel_init(struct ad7280_state *st)
 			}
 			st->channels[cnt].indexed = 1;
 			st->channels[cnt].info_mask =
-				(1 << IIO_CHAN_INFO_SCALE_SHARED);
+				IIO_CHAN_INFO_SCALE_SHARED_BIT;
 			st->channels[cnt].address =
 				AD7280A_DEVADDR(dev) << 8 | ch;
 			st->channels[cnt].scan_index = cnt;
@@ -523,7 +524,7 @@ static int ad7280_channel_init(struct ad7280_state *st)
 	st->channels[cnt].channel2 = dev * 6;
 	st->channels[cnt].address = AD7280A_ALL_CELLS;
 	st->channels[cnt].indexed = 1;
-	st->channels[cnt].info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED);
+	st->channels[cnt].info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT;
 	st->channels[cnt].scan_index = cnt;
 	st->channels[cnt].scan_type.sign = 'u';
 	st->channels[cnt].scan_type.realbits = 32;
@@ -600,7 +601,7 @@ static ssize_t ad7280_read_channel_config(struct device *dev,
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	unsigned val;
 
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD7280A_CELL_OVERVOLTAGE:
 		val = 1000 + (st->cell_threshhigh * 1568) / 100;
 		break;
@@ -636,7 +637,7 @@ static ssize_t ad7280_write_channel_config(struct device *dev,
 	if (ret)
 		return ret;
 
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD7280A_CELL_OVERVOLTAGE:
 	case AD7280A_CELL_UNDERVOLTAGE:
 		val = ((val - 1000) * 100) / 1568; /* LSB 15.68mV */
@@ -652,7 +653,7 @@ static ssize_t ad7280_write_channel_config(struct device *dev,
 	val = clamp(val, 0L, 0xFFL);
 
 	mutex_lock(&indio_dev->mlock);
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD7280A_CELL_OVERVOLTAGE:
 		st->cell_threshhigh = val;
 		break;
@@ -682,13 +683,13 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 	unsigned *channels;
 	int i, ret;
 
-	channels = kzalloc(sizeof(*channels) * st->scan_cnt, GFP_KERNEL);
+	channels = kcalloc(st->scan_cnt, sizeof(*channels), GFP_KERNEL);
 	if (channels == NULL)
 		return IRQ_HANDLED;
 
 	ret = ad7280_read_all_channels(st, st->scan_cnt, channels);
 	if (ret < 0)
-		return IRQ_HANDLED;
+		goto out;
 
 	for (i = 0; i < st->scan_cnt; i++) {
 		if (((channels[i] >> 23) & 0xF) <= AD7280A_CELL_VOLTAGE_6) {
@@ -731,6 +732,7 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 		}
 	}
 
+out:
 	kfree(channels);
 
 	return IRQ_HANDLED;
@@ -801,7 +803,7 @@ static int ad7280_read_raw(struct iio_dev *indio_dev,
 		*val = ret;
 
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		if ((chan->address & 0xFF) <= AD7280A_CELL_VOLTAGE_6)
 			scale_uv = (4000 * 1000) >> AD7280A_BITS;
 		else
@@ -968,11 +970,11 @@ static const struct spi_device_id ad7280_id[] = {
 	{"ad7280a", 0},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7280_id);
 
 static struct spi_driver ad7280_driver = {
 	.driver = {
 		.name	= "ad7280",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7280_probe,
diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c
index aa44a52a7ad..0a13616e3db 100644
--- a/drivers/staging/iio/adc/ad7291.c
+++ b/drivers/staging/iio/adc/ad7291.c
@@ -19,6 +19,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../events.h"
 
 /*
  * Simplified handling
@@ -500,7 +501,7 @@ static int ad7291_read_raw(struct iio_dev *indio_dev,
 		default:
 			return -EINVAL;
 		}
-	case (1 << IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE):
+	case IIO_CHAN_INFO_AVERAGE_RAW:
 		ret = i2c_smbus_read_word_data(chip->client,
 					       AD7291_T_AVERAGE);
 			if (ret < 0)
@@ -509,18 +510,24 @@ static int ad7291_read_raw(struct iio_dev *indio_dev,
 				AD7291_VALUE_MASK) << 4) >> 4;
 			*val = signval;
 			return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
-		scale_uv = (chip->int_vref_mv * 1000) >> AD7291_BITS;
-		*val =  scale_uv / 1000;
-		*val2 = (scale_uv % 1000) * 1000;
-		return IIO_VAL_INT_PLUS_MICRO;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-		/*
-		* One LSB of the ADC corresponds to 0.25 deg C.
-		* The temperature reading is in 12-bit twos complement format
-		*/
-		*val = 250;
-		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_VOLTAGE:
+			scale_uv = (chip->int_vref_mv * 1000) >> AD7291_BITS;
+			*val =  scale_uv / 1000;
+			*val2 = (scale_uv % 1000) * 1000;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_TEMP:
+			/*
+			 * One LSB of the ADC corresponds to 0.25 deg C.
+			 * The temperature reading is in 12-bit twos
+			 * complement format
+			 */
+			*val = 250;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
 	default:
 		return -EINVAL;
 	}
@@ -529,7 +536,7 @@ static int ad7291_read_raw(struct iio_dev *indio_dev,
 #define AD7291_VOLTAGE_CHAN(_chan)					\
 {									\
 	.type = IIO_VOLTAGE,						\
-	.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),			\
+	.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,			\
 	.indexed = 1,							\
 	.channel = _chan,						\
 	.event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING)|\
@@ -547,8 +554,8 @@ static const struct iio_chan_spec ad7291_channels[] = {
 	AD7291_VOLTAGE_CHAN(7),
 	{
 		.type = IIO_TEMP,
-		.info_mask = (1 << IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE) |
-				(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE_BIT |
+				IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.indexed = 1,
 		.channel = 0,
 		.event_mask =
diff --git a/drivers/staging/iio/adc/ad7298.h b/drivers/staging/iio/adc/ad7298.h
index 9ddf5cf0e51..a0e5dea415e 100644
--- a/drivers/staging/iio/adc/ad7298.h
+++ b/drivers/staging/iio/adc/ad7298.h
@@ -54,14 +54,9 @@ struct ad7298_state {
 };
 
 #ifdef CONFIG_IIO_BUFFER
-int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch);
 int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void ad7298_ring_cleanup(struct iio_dev *indio_dev);
 #else /* CONFIG_IIO_BUFFER */
-static inline int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch)
-{
-	return 0;
-}
 
 static inline int
 ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)
diff --git a/drivers/staging/iio/adc/ad7298_core.c b/drivers/staging/iio/adc/ad7298_core.c
index a799bd1922d..8dd6aa9cf92 100644
--- a/drivers/staging/iio/adc/ad7298_core.c
+++ b/drivers/staging/iio/adc/ad7298_core.c
@@ -18,37 +18,37 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "ad7298.h"
 
 static struct iio_chan_spec ad7298_channels[] = {
 	IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 9, AD7298_CH_TEMP, IIO_ST('s', 32, 32, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 0, 0, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 1, 1, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 2, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 2, 2, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 3, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 3, 3, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 4, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 4, 4, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 5, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 5, 5, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 6, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 6, 6, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 7, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		 IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		 7, 7, IIO_ST('u', 12, 16, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(8),
 };
@@ -69,27 +69,28 @@ static int ad7298_scan_direct(struct ad7298_state *st, unsigned ch)
 static int ad7298_scan_temp(struct ad7298_state *st, int *val)
 {
 	int tmp, ret;
+	__be16 buf;
 
-	tmp = cpu_to_be16(AD7298_WRITE | AD7298_TSENSE |
+	buf = cpu_to_be16(AD7298_WRITE | AD7298_TSENSE |
 			  AD7298_TAVG | st->ext_ref);
 
-	ret = spi_write(st->spi, (u8 *)&tmp, 2);
+	ret = spi_write(st->spi, (u8 *)&buf, 2);
 	if (ret)
 		return ret;
 
-	tmp = 0;
+	buf = cpu_to_be16(0);
 
-	ret = spi_write(st->spi, (u8 *)&tmp, 2);
+	ret = spi_write(st->spi, (u8 *)&buf, 2);
 	if (ret)
 		return ret;
 
 	usleep_range(101, 1000); /* sleep > 100us */
 
-	ret = spi_read(st->spi, (u8 *)&tmp, 2);
+	ret = spi_read(st->spi, (u8 *)&buf, 2);
 	if (ret)
 		return ret;
 
-	tmp = be16_to_cpu(tmp) & RES_MASK(AD7298_BITS);
+	tmp = be16_to_cpu(buf) & RES_MASK(AD7298_BITS);
 
 	/*
 	 * One LSB of the ADC corresponds to 0.25 deg C.
@@ -122,12 +123,8 @@ static int ad7298_read_raw(struct iio_dev *indio_dev,
 	switch (m) {
 	case 0:
 		mutex_lock(&indio_dev->mlock);
-		if (iio_buffer_enabled(indio_dev)) {
-			if (chan->address == AD7298_CH_TEMP)
-				ret = -ENODEV;
-			else
-				ret = ad7298_scan_from_ring(indio_dev,
-							    chan->address);
+		if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
+			ret = -EBUSY;
 		} else {
 			if (chan->address == AD7298_CH_TEMP)
 				ret = ad7298_scan_temp(st, val);
@@ -143,15 +140,20 @@ static int ad7298_read_raw(struct iio_dev *indio_dev,
 			*val = ret & RES_MASK(AD7298_BITS);
 
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
-		scale_uv = (st->int_vref_mv * 1000) >> AD7298_BITS;
-		*val =  scale_uv / 1000;
-		*val2 = (scale_uv % 1000) * 1000;
-		return IIO_VAL_INT_PLUS_MICRO;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-		*val =  1;
-		*val2 = 0;
-		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_VOLTAGE:
+			scale_uv = (st->int_vref_mv * 1000) >> AD7298_BITS;
+			*val =  scale_uv / 1000;
+			*val2 = (scale_uv % 1000) * 1000;
+			return IIO_VAL_INT_PLUS_MICRO;
+		case IIO_TEMP:
+			*val =  1;
+			*val2 = 0;
+			return IIO_VAL_INT_PLUS_MICRO;
+		default:
+			return -EINVAL;
+		}
 	}
 	return -EINVAL;
 }
@@ -265,11 +267,11 @@ static const struct spi_device_id ad7298_id[] = {
 	{"ad7298", 0},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7298_id);
 
 static struct spi_driver ad7298_driver = {
 	.driver = {
 		.name	= "ad7298",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7298_probe,
@@ -281,4 +283,3 @@ module_spi_driver(ad7298_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD7298 ADC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad7298");
diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c
index 47630d506a6..d1a12dd015e 100644
--- a/drivers/staging/iio/adc/ad7298_ring.c
+++ b/drivers/staging/iio/adc/ad7298_ring.c
@@ -12,41 +12,12 @@
 #include <linux/spi/spi.h>
 
 #include "../iio.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger_consumer.h"
 
 #include "ad7298.h"
 
-int ad7298_scan_from_ring(struct iio_dev *indio_dev, long ch)
-{
-	struct iio_buffer *ring = indio_dev->buffer;
-	int ret;
-	u16 *ring_data;
-
-	if (!(test_bit(ch, ring->scan_mask))) {
-		ret = -EBUSY;
-		goto error_ret;
-	}
-
-	ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
-			    GFP_KERNEL);
-	if (ring_data == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	ret = ring->access->read_last(ring, (u8 *) ring_data);
-	if (ret)
-		goto error_free_ring_data;
-
-	ret = be16_to_cpu(ring_data[ch]);
-
-error_free_ring_data:
-	kfree(ring_data);
-error_ret:
-	return ret;
-}
-
 /**
  * ad7298_ring_preenable() setup the parameters of the ring before enabling
  *
@@ -61,8 +32,9 @@ static int ad7298_ring_preenable(struct iio_dev *indio_dev)
 	size_t d_size;
 	int i, m;
 	unsigned short command;
-
-	d_size = ring->scan_count * (AD7298_STORAGE_BITS / 8);
+	int scan_count = bitmap_weight(indio_dev->active_scan_mask,
+				       indio_dev->masklength);
+	d_size = scan_count * (AD7298_STORAGE_BITS / 8);
 
 	if (ring->scan_timestamp) {
 		d_size += sizeof(s64);
@@ -79,7 +51,7 @@ static int ad7298_ring_preenable(struct iio_dev *indio_dev)
 	command = AD7298_WRITE | st->ext_ref;
 
 	for (i = 0, m = AD7298_CH(0); i < AD7298_MAX_CHAN; i++, m >>= 1)
-		if (test_bit(i, ring->scan_mask))
+		if (test_bit(i, indio_dev->active_scan_mask))
 			command |= m;
 
 	st->tx_buf[0] = cpu_to_be16(command);
@@ -96,7 +68,7 @@ static int ad7298_ring_preenable(struct iio_dev *indio_dev)
 	spi_message_add_tail(&st->ring_xfer[0], &st->ring_msg);
 	spi_message_add_tail(&st->ring_xfer[1], &st->ring_msg);
 
-	for (i = 0; i < ring->scan_count; i++) {
+	for (i = 0; i < scan_count; i++) {
 		st->ring_xfer[i + 2].rx_buf = &st->rx_buf[i];
 		st->ring_xfer[i + 2].len = 2;
 		st->ring_xfer[i + 2].cs_change = 1;
@@ -134,7 +106,8 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
 			&time_ns, sizeof(time_ns));
 	}
 
-	for (i = 0; i < ring->scan_count; i++)
+	for (i = 0; i < bitmap_weight(indio_dev->active_scan_mask,
+						 indio_dev->masklength); i++)
 		buf[i] = be16_to_cpu(st->rx_buf[i]);
 
 	indio_dev->buffer->access->store_to(ring, (u8 *)buf, time_ns);
@@ -174,7 +147,7 @@ int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	}
 
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &ad7298_ring_setup_ops;
+	indio_dev->setup_ops = &ad7298_ring_setup_ops;
 	indio_dev->buffer->scan_timestamp = true;
 
 	/* Flag that polled ring buffering is possible */
diff --git a/drivers/staging/iio/adc/ad7476.h b/drivers/staging/iio/adc/ad7476.h
index 60142926565..27f696c75cc 100644
--- a/drivers/staging/iio/adc/ad7476.h
+++ b/drivers/staging/iio/adc/ad7476.h
@@ -50,14 +50,9 @@ enum ad7476_supported_device_ids {
 };
 
 #ifdef CONFIG_IIO_BUFFER
-int ad7476_scan_from_ring(struct iio_dev *indio_dev);
 int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void ad7476_ring_cleanup(struct iio_dev *indio_dev);
 #else /* CONFIG_IIO_BUFFER */
-static inline int ad7476_scan_from_ring(struct iio_dev *indio_dev)
-{
-	return 0;
-}
 
 static inline int
 ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)
diff --git a/drivers/staging/iio/adc/ad7476_core.c b/drivers/staging/iio/adc/ad7476_core.c
index 0b5852030ab..0c064d1c392 100644
--- a/drivers/staging/iio/adc/ad7476_core.c
+++ b/drivers/staging/iio/adc/ad7476_core.c
@@ -17,7 +17,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "ad7476.h"
 
@@ -46,7 +46,7 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		mutex_lock(&indio_dev->mlock);
 		if (iio_buffer_enabled(indio_dev))
-			ret = ad7476_scan_from_ring(indio_dev);
+			ret = -EBUSY;
 		else
 			ret = ad7476_scan_direct(st);
 		mutex_unlock(&indio_dev->mlock);
@@ -56,7 +56,7 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
 		*val = (ret >> st->chip_info->channel[0].scan_type.shift) &
 			RES_MASK(st->chip_info->channel[0].scan_type.realbits);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		scale_uv = (st->int_vref_mv * 1000)
 			>> st->chip_info->channel[0].scan_type.realbits;
 		*val =  scale_uv/1000;
@@ -69,49 +69,49 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
 static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
 	[ID_AD7466] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 12, 16, 0), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 	},
 	[ID_AD7467] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 10, 16, 2), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 	},
 	[ID_AD7468] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1 , 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 8, 16, 4), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 	},
 	[ID_AD7475] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 12, 16, 0), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 	},
 	[ID_AD7476] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 12, 16, 0), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 	},
 	[ID_AD7477] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 10, 16, 2), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 	},
 	[ID_AD7478] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 8, 16, 4), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 	},
 	[ID_AD7495] = {
 		.channel[0] = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				       (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				       IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				       0, 0, IIO_ST('u', 12, 16, 0), 0),
 		.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
 		.int_vref_mv = 2500,
@@ -237,11 +237,11 @@ static const struct spi_device_id ad7476_id[] = {
 	{"ad7495", ID_AD7495},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7476_id);
 
 static struct spi_driver ad7476_driver = {
 	.driver = {
 		.name	= "ad7476",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7476_probe,
@@ -253,4 +253,3 @@ module_spi_driver(ad7476_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD7475/6/7/8(A) AD7466/7/8 ADC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad7476");
diff --git a/drivers/staging/iio/adc/ad7476_ring.c b/drivers/staging/iio/adc/ad7476_ring.c
index e82c1a433f4..4e298b2a05b 100644
--- a/drivers/staging/iio/adc/ad7476_ring.c
+++ b/drivers/staging/iio/adc/ad7476_ring.c
@@ -14,36 +14,12 @@
 #include <linux/spi/spi.h>
 
 #include "../iio.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger_consumer.h"
 
 #include "ad7476.h"
 
-int ad7476_scan_from_ring(struct iio_dev *indio_dev)
-{
-	struct iio_buffer *ring = indio_dev->buffer;
-	int ret;
-	u8 *ring_data;
-
-	ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
-			    GFP_KERNEL);
-	if (ring_data == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	ret = ring->access->read_last(ring, ring_data);
-	if (ret)
-		goto error_free_ring_data;
-
-	ret = (ring_data[0] << 8) | ring_data[1];
-
-error_free_ring_data:
-	kfree(ring_data);
-error_ret:
-	return ret;
-}
-
 /**
  * ad7476_ring_preenable() setup the parameters of the ring before enabling
  *
@@ -56,7 +32,8 @@ static int ad7476_ring_preenable(struct iio_dev *indio_dev)
 	struct ad7476_state *st = iio_priv(indio_dev);
 	struct iio_buffer *ring = indio_dev->buffer;
 
-	st->d_size = ring->scan_count *
+	st->d_size = bitmap_weight(indio_dev->active_scan_mask,
+				   indio_dev->masklength) *
 		st->chip_info->channel[0].scan_type.storagebits / 8;
 
 	if (ring->scan_timestamp) {
@@ -137,7 +114,7 @@ int ad7476_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	}
 
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &ad7476_ring_setup_ops;
+	indio_dev->setup_ops = &ad7476_ring_setup_ops;
 	indio_dev->buffer->scan_timestamp = true;
 
 	/* Flag that polled ring buffering is possible */
diff --git a/drivers/staging/iio/adc/ad7606.h b/drivers/staging/iio/adc/ad7606.h
index 35018c3f518..10f59896597 100644
--- a/drivers/staging/iio/adc/ad7606.h
+++ b/drivers/staging/iio/adc/ad7606.h
@@ -99,7 +99,6 @@ enum ad7606_supported_device_ids {
 	ID_AD7606_4
 };
 
-int ad7606_scan_from_ring(struct iio_dev *indio_dev, unsigned ch);
 int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void ad7606_ring_cleanup(struct iio_dev *indio_dev);
 #endif /* IIO_ADC_AD7606_H_ */
diff --git a/drivers/staging/iio/adc/ad7606_core.c b/drivers/staging/iio/adc/ad7606_core.c
index e3ecd3d2ef3..ddb7ef92f5c 100644
--- a/drivers/staging/iio/adc/ad7606_core.c
+++ b/drivers/staging/iio/adc/ad7606_core.c
@@ -20,7 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "ad7606.h"
 
@@ -91,7 +91,7 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		mutex_lock(&indio_dev->mlock);
 		if (iio_buffer_enabled(indio_dev))
-			ret = ad7606_scan_from_ring(indio_dev, chan->address);
+			ret = -EBUSY;
 		else
 			ret = ad7606_scan_direct(indio_dev, chan->address);
 		mutex_unlock(&indio_dev->mlock);
@@ -100,7 +100,7 @@ static int ad7606_read_raw(struct iio_dev *indio_dev,
 			return ret;
 		*val = (short) ret;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		scale_uv = (st->range * 1000 * 2)
 			>> st->chip_info->channels[0].scan_type.realbits;
 		*val =  scale_uv / 1000;
diff --git a/drivers/staging/iio/adc/ad7606_par.c b/drivers/staging/iio/adc/ad7606_par.c
index 688632edd3d..cff97568189 100644
--- a/drivers/staging/iio/adc/ad7606_par.c
+++ b/drivers/staging/iio/adc/ad7606_par.c
@@ -189,4 +189,3 @@ module_exit(ad7606_cleanup);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:ad7606_par");
diff --git a/drivers/staging/iio/adc/ad7606_ring.c b/drivers/staging/iio/adc/ad7606_ring.c
index 20927fd5372..e8f94a18a94 100644
--- a/drivers/staging/iio/adc/ad7606_ring.c
+++ b/drivers/staging/iio/adc/ad7606_ring.c
@@ -12,36 +12,12 @@
 #include <linux/slab.h>
 
 #include "../iio.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger_consumer.h"
 
 #include "ad7606.h"
 
-int ad7606_scan_from_ring(struct iio_dev *indio_dev, unsigned ch)
-{
-	struct iio_buffer *ring = indio_dev->buffer;
-	int ret;
-	u16 *ring_data;
-
-	ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
-			    GFP_KERNEL);
-	if (ring_data == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	ret = ring->access->read_last(ring, (u8 *) ring_data);
-	if (ret)
-		goto error_free_ring_data;
-
-	ret = ring_data[ch];
-
-error_free_ring_data:
-	kfree(ring_data);
-error_ret:
-	return ret;
-}
-
 /**
  * ad7606_trigger_handler_th() th/bh of trigger launched polling to ring buffer
  *
@@ -136,8 +112,6 @@ int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 
 	/* Effectively select the ring buffer implementation */
 	indio_dev->buffer->access = &ring_sw_access_funcs;
-	indio_dev->buffer->bpe =
-		st->chip_info->channels[0].scan_type.storagebits / 8;
 	indio_dev->pollfunc = iio_alloc_pollfunc(&ad7606_trigger_handler_th_bh,
 						 &ad7606_trigger_handler_th_bh,
 						 0,
@@ -152,7 +126,7 @@ int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 
 	/* Ring buffer functions - here trigger setup related */
 
-	indio_dev->buffer->setup_ops = &ad7606_ring_setup_ops;
+	indio_dev->setup_ops = &ad7606_ring_setup_ops;
 	indio_dev->buffer->scan_timestamp = true ;
 
 	INIT_WORK(&st->poll_work, &ad7606_poll_bh_to_ring);
diff --git a/drivers/staging/iio/adc/ad7606_spi.c b/drivers/staging/iio/adc/ad7606_spi.c
index b984bd2048b..237f1c44d29 100644
--- a/drivers/staging/iio/adc/ad7606_spi.c
+++ b/drivers/staging/iio/adc/ad7606_spi.c
@@ -97,11 +97,11 @@ static const struct spi_device_id ad7606_id[] = {
 	{"ad7606-4", ID_AD7606_4},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7606_id);
 
 static struct spi_driver ad7606_driver = {
 	.driver = {
 		.name = "ad7606",
-		.bus = &spi_bus_type,
 		.owner = THIS_MODULE,
 		.pm    = AD7606_SPI_PM_OPS,
 	},
@@ -114,4 +114,3 @@ module_spi_driver(ad7606_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad7606_spi");
diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index ec90261cbc3..a13e58c814e 100644
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -114,7 +114,7 @@ static int ad7780_read_raw(struct iio_dev *indio_dev,
 			*val *= 128;
 
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		scale_uv = (st->int_vref_mv * 100000)
 			>> (channel.scan_type.realbits - 1);
 		*val =  scale_uv / 100000;
@@ -127,12 +127,12 @@ static int ad7780_read_raw(struct iio_dev *indio_dev,
 static const struct ad7780_chip_info ad7780_chip_info_tbl[] = {
 	[ID_AD7780] = {
 		.channel = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				    0, 0, IIO_ST('s', 24, 32, 8), 0),
 	},
 	[ID_AD7781] = {
 		.channel = IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 0, 0,
-				    (1 << IIO_CHAN_INFO_SCALE_SHARED),
+				    IIO_CHAN_INFO_SCALE_SHARED_BIT,
 				    0, 0, IIO_ST('s', 20, 32, 12), 0),
 	},
 };
@@ -272,11 +272,11 @@ static const struct spi_device_id ad7780_id[] = {
 	{"ad7781", ID_AD7781},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7780_id);
 
 static struct spi_driver ad7780_driver = {
 	.driver = {
 		.name	= "ad7780",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7780_probe,
diff --git a/drivers/staging/iio/adc/ad7793.c b/drivers/staging/iio/adc/ad7793.c
index 1c5588e88cd..6a058b19c49 100644
--- a/drivers/staging/iio/adc/ad7793.c
+++ b/drivers/staging/iio/adc/ad7793.c
@@ -20,7 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger.h"
 #include "../trigger_consumer.h"
@@ -316,25 +316,6 @@ out:
 	return ret;
 }
 
-static int ad7793_scan_from_ring(struct ad7793_state *st, unsigned ch, int *val)
-{
-	struct iio_buffer *ring = iio_priv_to_dev(st)->buffer;
-	int ret;
-	s64 dat64[2];
-	u32 *dat32 = (u32 *)dat64;
-
-	if (!(test_bit(ch, ring->scan_mask)))
-		return  -EBUSY;
-
-	ret = ring->access->read_last(ring, (u8 *) &dat64);
-	if (ret)
-		return ret;
-
-	*val = *dat32;
-
-	return 0;
-}
-
 static int ad7793_ring_preenable(struct iio_dev *indio_dev)
 {
 	struct ad7793_state *st = iio_priv(indio_dev);
@@ -342,14 +323,15 @@ static int ad7793_ring_preenable(struct iio_dev *indio_dev)
 	size_t d_size;
 	unsigned channel;
 
-	if (!ring->scan_count)
+	if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		return -EINVAL;
 
-	channel = find_first_bit(ring->scan_mask,
+	channel = find_first_bit(indio_dev->active_scan_mask,
 				 indio_dev->masklength);
 
-	d_size = ring->scan_count *
-		 indio_dev->channels[0].scan_type.storagebits / 8;
+	d_size = bitmap_weight(indio_dev->active_scan_mask,
+			       indio_dev->masklength) *
+		indio_dev->channels[0].scan_type.storagebits / 8;
 
 	if (ring->scan_timestamp) {
 		d_size += sizeof(s64);
@@ -411,7 +393,7 @@ static irqreturn_t ad7793_trigger_handler(int irq, void *p)
 	s64 dat64[2];
 	s32 *dat32 = (s32 *)dat64;
 
-	if (ring->scan_count)
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		__ad7793_read_reg(st, 1, 1, AD7793_REG_DATA,
 				  dat32,
 				  indio_dev->channels[0].scan_type.realbits/8);
@@ -459,7 +441,7 @@ static int ad7793_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	}
 
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &ad7793_ring_setup_ops;
+	indio_dev->setup_ops = &ad7793_ring_setup_ops;
 
 	/* Flag that polled ring buffering is possible */
 	indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
@@ -493,6 +475,10 @@ static irqreturn_t ad7793_data_rdy_trig_poll(int irq, void *private)
 	return IRQ_HANDLED;
 }
 
+static struct iio_trigger_ops ad7793_trigger_ops = {
+	.owner = THIS_MODULE,
+};
+
 static int ad7793_probe_trigger(struct iio_dev *indio_dev)
 {
 	struct ad7793_state *st = iio_priv(indio_dev);
@@ -505,6 +491,7 @@ static int ad7793_probe_trigger(struct iio_dev *indio_dev)
 		ret = -ENOMEM;
 		goto error_ret;
 	}
+	st->trig->ops = &ad7793_trigger_ops;
 
 	ret = request_irq(st->spi->irq,
 			  ad7793_data_rdy_trig_poll,
@@ -517,7 +504,6 @@ static int ad7793_probe_trigger(struct iio_dev *indio_dev)
 	disable_irq_nosync(st->spi->irq);
 	st->irq_dis = true;
 	st->trig->dev.parent = &st->spi->dev;
-	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = indio_dev;
 
 	ret = iio_trigger_register(st->trig);
@@ -649,8 +635,7 @@ static int ad7793_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		mutex_lock(&indio_dev->mlock);
 		if (iio_buffer_enabled(indio_dev))
-			ret = ad7793_scan_from_ring(st,
-					chan->scan_index, &smpl);
+			ret = -EBUSY;
 		else
 			ret = ad7793_read(st, chan->address,
 					chan->scan_type.realbits / 8, &smpl);
@@ -667,19 +652,21 @@ static int ad7793_read_raw(struct iio_dev *indio_dev,
 
 		return IIO_VAL_INT;
 
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
-		*val = st->scale_avail[(st->conf >> 8) & 0x7][0];
-		*val2 = st->scale_avail[(st->conf >> 8) & 0x7][1];
-
-		return IIO_VAL_INT_PLUS_NANO;
-
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_VOLTAGE:
-			/* 1170mV / 2^23 * 6 */
-			scale_uv = (1170ULL * 100000000ULL * 6ULL)
-				>> (chan->scan_type.realbits -
-				(unipolar ? 0 : 1));
+			if (chan->differential) {
+				*val = st->
+					scale_avail[(st->conf >> 8) & 0x7][0];
+				*val2 = st->
+					scale_avail[(st->conf >> 8) & 0x7][1];
+				return IIO_VAL_INT_PLUS_NANO;
+			} else {
+				/* 1170mV / 2^23 * 6 */
+				scale_uv = (1170ULL * 100000000ULL * 6ULL)
+					>> (chan->scan_type.realbits -
+					    (unipolar ? 0 : 1));
+			}
 			break;
 		case IIO_TEMP:
 			/* Always uses unity gain and internal ref */
@@ -716,7 +703,7 @@ static int ad7793_write_raw(struct iio_dev *indio_dev,
 	}
 
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		ret = -EINVAL;
 		for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
 			if (val2 == st->scale_avail[i][1]) {
@@ -775,7 +762,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 0,
 			.channel2 = 0,
 			.address = AD7793_CH_AIN1P_AIN1M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 0,
 			.scan_type = IIO_ST('s', 24, 32, 0)
 		},
@@ -786,7 +773,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 1,
 			.channel2 = 1,
 			.address = AD7793_CH_AIN2P_AIN2M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 1,
 			.scan_type = IIO_ST('s', 24, 32, 0)
 		},
@@ -797,7 +784,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 2,
 			.channel2 = 2,
 			.address = AD7793_CH_AIN3P_AIN3M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 2,
 			.scan_type = IIO_ST('s', 24, 32, 0)
 		},
@@ -809,7 +796,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 2,
 			.channel2 = 2,
 			.address = AD7793_CH_AIN1M_AIN1M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 2,
 			.scan_type = IIO_ST('s', 24, 32, 0)
 		},
@@ -818,7 +805,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.indexed = 1,
 			.channel = 0,
 			.address = AD7793_CH_TEMP,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+			.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 			.scan_index = 4,
 			.scan_type = IIO_ST('s', 24, 32, 0),
 		},
@@ -828,7 +815,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.indexed = 1,
 			.channel = 4,
 			.address = AD7793_CH_AVDD_MONITOR,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+			.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 			.scan_index = 5,
 			.scan_type = IIO_ST('s', 24, 32, 0),
 		},
@@ -842,7 +829,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 0,
 			.channel2 = 0,
 			.address = AD7793_CH_AIN1P_AIN1M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 0,
 			.scan_type = IIO_ST('s', 16, 32, 0)
 		},
@@ -853,7 +840,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 1,
 			.channel2 = 1,
 			.address = AD7793_CH_AIN2P_AIN2M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 1,
 			.scan_type = IIO_ST('s', 16, 32, 0)
 		},
@@ -864,7 +851,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 2,
 			.channel2 = 2,
 			.address = AD7793_CH_AIN3P_AIN3M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 2,
 			.scan_type = IIO_ST('s', 16, 32, 0)
 		},
@@ -876,7 +863,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.channel = 2,
 			.channel2 = 2,
 			.address = AD7793_CH_AIN1M_AIN1M,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.scan_index = 2,
 			.scan_type = IIO_ST('s', 16, 32, 0)
 		},
@@ -885,7 +872,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.indexed = 1,
 			.channel = 0,
 			.address = AD7793_CH_TEMP,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+			.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 			.scan_index = 4,
 			.scan_type = IIO_ST('s', 16, 32, 0),
 		},
@@ -895,7 +882,7 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
 			.indexed = 1,
 			.channel = 4,
 			.address = AD7793_CH_AVDD_MONITOR,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+			.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 			.scan_index = 5,
 			.scan_type = IIO_ST('s', 16, 32, 0),
 		},
@@ -1034,11 +1021,11 @@ static const struct spi_device_id ad7793_id[] = {
 	{"ad7793", ID_AD7793},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7793_id);
 
 static struct spi_driver ad7793_driver = {
 	.driver = {
 		.name	= "ad7793",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7793_probe,
diff --git a/drivers/staging/iio/adc/ad7816.c b/drivers/staging/iio/adc/ad7816.c
index acbf9363132..52b720e2b03 100644
--- a/drivers/staging/iio/adc/ad7816.c
+++ b/drivers/staging/iio/adc/ad7816.c
@@ -18,6 +18,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../events.h"
 
 /*
  * AD7816 config masks
@@ -459,7 +460,6 @@ MODULE_DEVICE_TABLE(spi, ad7816_id);
 static struct spi_driver ad7816_driver = {
 	.driver = {
 		.name = "ad7816",
-		.bus = &spi_bus_type,
 		.owner = THIS_MODULE,
 	},
 	.probe = ad7816_probe,
diff --git a/drivers/staging/iio/adc/ad7887.h b/drivers/staging/iio/adc/ad7887.h
index 3452d181907..bc53b653212 100644
--- a/drivers/staging/iio/adc/ad7887.h
+++ b/drivers/staging/iio/adc/ad7887.h
@@ -83,14 +83,9 @@ enum ad7887_supported_device_ids {
 };
 
 #ifdef CONFIG_IIO_BUFFER
-int ad7887_scan_from_ring(struct ad7887_state *st, int channum);
 int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void ad7887_ring_cleanup(struct iio_dev *indio_dev);
 #else /* CONFIG_IIO_BUFFER */
-static inline int ad7887_scan_from_ring(struct ad7887_state *st, int channum)
-{
-	return 0;
-}
 
 static inline int
 ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev)
diff --git a/drivers/staging/iio/adc/ad7887_core.c b/drivers/staging/iio/adc/ad7887_core.c
index 91b8fb09d92..e9bbc3eed15 100644
--- a/drivers/staging/iio/adc/ad7887_core.c
+++ b/drivers/staging/iio/adc/ad7887_core.c
@@ -17,7 +17,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 
 #include "ad7887.h"
@@ -45,7 +45,7 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		mutex_lock(&indio_dev->mlock);
 		if (iio_buffer_enabled(indio_dev))
-			ret = ad7887_scan_from_ring(st, 1 << chan->address);
+			ret = -EBUSY;
 		else
 			ret = ad7887_scan_direct(st, chan->address);
 		mutex_unlock(&indio_dev->mlock);
@@ -55,7 +55,7 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
 		*val = (ret >> st->chip_info->channel[0].scan_type.shift) &
 			RES_MASK(st->chip_info->channel[0].scan_type.realbits);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		scale_uv = (st->int_vref_mv * 1000)
 			>> st->chip_info->channel[0].scan_type.realbits;
 		*val =  scale_uv/1000;
@@ -75,7 +75,7 @@ static const struct ad7887_chip_info ad7887_chip_info_tbl[] = {
 			.type = IIO_VOLTAGE,
 			.indexed = 1,
 			.channel = 1,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.address = 1,
 			.scan_index = 1,
 			.scan_type = IIO_ST('u', 12, 16, 0),
@@ -84,7 +84,7 @@ static const struct ad7887_chip_info ad7887_chip_info_tbl[] = {
 			.type = IIO_VOLTAGE,
 			.indexed = 1,
 			.channel = 0,
-			.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+			.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 			.address = 0,
 			.scan_index = 0,
 			.scan_type = IIO_ST('u', 12, 16, 0),
@@ -246,11 +246,11 @@ static const struct spi_device_id ad7887_id[] = {
 	{"ad7887", ID_AD7887},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad7887_id);
 
 static struct spi_driver ad7887_driver = {
 	.driver = {
 		.name	= "ad7887",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad7887_probe,
@@ -262,4 +262,3 @@ module_spi_driver(ad7887_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD7887 ADC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad7887");
diff --git a/drivers/staging/iio/adc/ad7887_ring.c b/drivers/staging/iio/adc/ad7887_ring.c
index cb74cada561..85076cd962e 100644
--- a/drivers/staging/iio/adc/ad7887_ring.c
+++ b/drivers/staging/iio/adc/ad7887_ring.c
@@ -13,46 +13,12 @@
 #include <linux/spi/spi.h>
 
 #include "../iio.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger_consumer.h"
 
 #include "ad7887.h"
 
-int ad7887_scan_from_ring(struct ad7887_state *st, int channum)
-{
-	struct iio_buffer *ring = iio_priv_to_dev(st)->buffer;
-	int count = 0, ret;
-	u16 *ring_data;
-
-	if (!(test_bit(channum, ring->scan_mask))) {
-		ret = -EBUSY;
-		goto error_ret;
-	}
-
-	ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
-			    GFP_KERNEL);
-	if (ring_data == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	ret = ring->access->read_last(ring, (u8 *) ring_data);
-	if (ret)
-		goto error_free_ring_data;
-
-	/* for single channel scan the result is stored with zero offset */
-	if ((test_bit(1, ring->scan_mask) || test_bit(0, ring->scan_mask)) &&
-	    (channum == 1))
-		count = 1;
-
-	ret = be16_to_cpu(ring_data[count]);
-
-error_free_ring_data:
-	kfree(ring_data);
-error_ret:
-	return ret;
-}
-
 /**
  * ad7887_ring_preenable() setup the parameters of the ring before enabling
  *
@@ -65,7 +31,8 @@ static int ad7887_ring_preenable(struct iio_dev *indio_dev)
 	struct ad7887_state *st = iio_priv(indio_dev);
 	struct iio_buffer *ring = indio_dev->buffer;
 
-	st->d_size = ring->scan_count *
+	st->d_size = bitmap_weight(indio_dev->active_scan_mask,
+				   indio_dev->masklength) *
 		st->chip_info->channel[0].scan_type.storagebits / 8;
 
 	if (ring->scan_timestamp) {
@@ -80,7 +47,7 @@ static int ad7887_ring_preenable(struct iio_dev *indio_dev)
 			set_bytes_per_datum(indio_dev->buffer, st->d_size);
 
 	/* We know this is a single long so can 'cheat' */
-	switch (*ring->scan_mask) {
+	switch (*indio_dev->active_scan_mask) {
 	case (1 << 0):
 		st->ring_msg = &st->msg[AD7887_CH0];
 		break;
@@ -121,7 +88,8 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p)
 	__u8 *buf;
 	int b_sent;
 
-	unsigned int bytes = ring->scan_count *
+	unsigned int bytes = bitmap_weight(indio_dev->active_scan_mask,
+					   indio_dev->masklength) *
 		st->chip_info->channel[0].scan_type.storagebits / 8;
 
 	buf = kzalloc(st->d_size, GFP_KERNEL);
@@ -176,7 +144,7 @@ int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 		goto error_deallocate_sw_rb;
 	}
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &ad7887_ring_setup_ops;
+	indio_dev->setup_ops = &ad7887_ring_setup_ops;
 
 	/* Flag that polled ring buffering is possible */
 	indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
diff --git a/drivers/staging/iio/adc/ad799x.h b/drivers/staging/iio/adc/ad799x.h
index eda01d5bab7..356f690a76f 100644
--- a/drivers/staging/iio/adc/ad799x.h
+++ b/drivers/staging/iio/adc/ad799x.h
@@ -124,15 +124,9 @@ struct ad799x_platform_data {
 int ad7997_8_set_scan_mode(struct ad799x_state *st, unsigned mask);
 
 #ifdef CONFIG_AD799X_RING_BUFFER
-int ad799x_single_channel_from_ring(struct iio_dev *indio_dev, int channum);
 int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void ad799x_ring_cleanup(struct iio_dev *indio_dev);
 #else /* CONFIG_AD799X_RING_BUFFER */
-int ad799x_single_channel_from_ring(struct iio_dev *indio_dev, int channum)
-{
-	return -EINVAL;
-}
-
 
 static inline int
 ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)
diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
index c0d2f886ea2..d5b581d8bc2 100644
--- a/drivers/staging/iio/adc/ad799x_core.c
+++ b/drivers/staging/iio/adc/ad799x_core.c
@@ -35,7 +35,8 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../events.h"
+#include "../buffer.h"
 
 #include "ad799x.h"
 
@@ -150,8 +151,7 @@ static int ad799x_read_raw(struct iio_dev *indio_dev,
 	case 0:
 		mutex_lock(&indio_dev->mlock);
 		if (iio_buffer_enabled(indio_dev))
-			ret = ad799x_single_channel_from_ring(indio_dev,
-							      chan->scan_index);
+			ret = -EBUSY;
 		else
 			ret = ad799x_scan_direct(st, chan->scan_index);
 		mutex_unlock(&indio_dev->mlock);
@@ -161,7 +161,7 @@ static int ad799x_read_raw(struct iio_dev *indio_dev,
 		*val = (ret >> chan->scan_type.shift) &
 			RES_MASK(chan->scan_type.realbits);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		scale_uv = (st->int_vref_mv * 1000) >> chan->scan_type.realbits;
 		*val =  scale_uv / 1000;
 		*val2 = (scale_uv % 1000) * 1000;
@@ -934,4 +934,3 @@ module_i2c_driver(ad799x_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD799x ADC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("i2c:ad799x");
diff --git a/drivers/staging/iio/adc/ad799x_ring.c b/drivers/staging/iio/adc/ad799x_ring.c
index e3f4698d781..5dded9e7820 100644
--- a/drivers/staging/iio/adc/ad799x_ring.c
+++ b/drivers/staging/iio/adc/ad799x_ring.c
@@ -17,42 +17,12 @@
 #include <linux/bitops.h>
 
 #include "../iio.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger_consumer.h"
 
 #include "ad799x.h"
 
-int ad799x_single_channel_from_ring(struct iio_dev *indio_dev, int channum)
-{
-	struct iio_buffer *ring = indio_dev->buffer;
-	int count = 0, ret;
-	u16 *ring_data;
-
-	if (!(test_bit(channum, ring->scan_mask))) {
-		ret = -EBUSY;
-		goto error_ret;
-	}
-
-	ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
-			    GFP_KERNEL);
-	if (ring_data == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	ret = ring->access->read_last(ring, (u8 *) ring_data);
-	if (ret)
-		goto error_free_ring_data;
-	/* Need a count of channels prior to this one */
-	count = bitmap_weight(ring->scan_mask, channum);
-	ret = be16_to_cpu(ring_data[count]);
-
-error_free_ring_data:
-	kfree(ring_data);
-error_ret:
-	return ret;
-}
-
 /**
  * ad799x_ring_preenable() setup the parameters of the ring before enabling
  *
@@ -71,9 +41,10 @@ static int ad799x_ring_preenable(struct iio_dev *indio_dev)
 	 */
 
 	if (st->id == ad7997 || st->id == ad7998)
-		ad7997_8_set_scan_mode(st, *ring->scan_mask);
+		ad7997_8_set_scan_mode(st, *indio_dev->active_scan_mask);
 
-	st->d_size = ring->scan_count * 2;
+	st->d_size = bitmap_weight(indio_dev->active_scan_mask,
+				   indio_dev->masklength) * 2;
 
 	if (ring->scan_timestamp) {
 		st->d_size += sizeof(s64);
@@ -115,12 +86,13 @@ static irqreturn_t ad799x_trigger_handler(int irq, void *p)
 	case ad7991:
 	case ad7995:
 	case ad7999:
-		cmd = st->config | (*ring->scan_mask << AD799X_CHANNEL_SHIFT);
+		cmd = st->config |
+			(*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT);
 		break;
 	case ad7992:
 	case ad7993:
 	case ad7994:
-		cmd = (*ring->scan_mask << AD799X_CHANNEL_SHIFT) |
+		cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) |
 			AD7998_CONV_RES_REG;
 		break;
 	case ad7997:
@@ -132,7 +104,8 @@ static irqreturn_t ad799x_trigger_handler(int irq, void *p)
 	}
 
 	b_sent = i2c_smbus_read_i2c_block_data(st->client,
-			cmd, ring->scan_count * 2, rxbuf);
+			cmd, bitmap_weight(indio_dev->active_scan_mask,
+					   indio_dev->masklength) * 2, rxbuf);
 	if (b_sent < 0)
 		goto done;
 
@@ -183,7 +156,7 @@ int ad799x_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	}
 
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &ad799x_buf_setup_ops;
+	indio_dev->setup_ops = &ad799x_buf_setup_ops;
 	indio_dev->buffer->scan_timestamp = true;
 
 	/* Flag that polled ring buffering is possible */
diff --git a/drivers/staging/iio/adc/adt7310.c b/drivers/staging/iio/adc/adt7310.c
index bc307f3b024..eec2f325d54 100644
--- a/drivers/staging/iio/adc/adt7310.c
+++ b/drivers/staging/iio/adc/adt7310.c
@@ -17,7 +17,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-
+#include "../events.h"
 /*
  * ADT7310 registers definition
  */
@@ -877,7 +877,6 @@ MODULE_DEVICE_TABLE(spi, adt7310_id);
 static struct spi_driver adt7310_driver = {
 	.driver = {
 		.name = "adt7310",
-		.bus = &spi_bus_type,
 		.owner = THIS_MODULE,
 	},
 	.probe = adt7310_probe,
diff --git a/drivers/staging/iio/adc/adt7410.c b/drivers/staging/iio/adc/adt7410.c
index 3481cf6f757..c62248ceb37 100644
--- a/drivers/staging/iio/adc/adt7410.c
+++ b/drivers/staging/iio/adc/adt7410.c
@@ -17,6 +17,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../events.h"
 
 /*
  * ADT7410 registers definition
diff --git a/drivers/staging/iio/adc/max1363.h b/drivers/staging/iio/adc/max1363.h
index cbcb08a2cb5..2cd0112067b 100644
--- a/drivers/staging/iio/adc/max1363.h
+++ b/drivers/staging/iio/adc/max1363.h
@@ -146,22 +146,22 @@ struct max1363_state {
 };
 
 const struct max1363_mode
-*max1363_match_mode(unsigned long *mask, const struct max1363_chip_info *ci);
+*max1363_match_mode(const unsigned long *mask,
+		    const struct max1363_chip_info *ci);
 
 int max1363_set_scan_mode(struct max1363_state *st);
 
 #ifdef CONFIG_MAX1363_RING_BUFFER
-
-int max1363_single_channel_from_ring(const long *mask,
-				     struct max1363_state *st);
+int max1363_update_scan_mode(struct iio_dev *indio_dev,
+			     const unsigned long *scan_mask);
 int max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev);
 void max1363_ring_cleanup(struct iio_dev *indio_dev);
 
 #else /* CONFIG_MAX1363_RING_BUFFER */
-
-int max1363_single_channel_from_ring(long mask, struct max1363_state *st)
+int max1363_update_scan_mode(struct iio_dev *indio_dev,
+			     const long *scan_mask)
 {
-	return -EINVAL;
+	return 0;
 }
 
 static inline int
diff --git a/drivers/staging/iio/adc/max1363_core.c b/drivers/staging/iio/adc/max1363_core.c
index 3f28f1ab52a..b92cb4af18c 100644
--- a/drivers/staging/iio/adc/max1363_core.c
+++ b/drivers/staging/iio/adc/max1363_core.c
@@ -34,7 +34,8 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../events.h"
+#include "../buffer.h"
 
 #include "max1363.h"
 
@@ -147,7 +148,8 @@ static const struct max1363_mode max1363_mode_table[] = {
 };
 
 const struct max1363_mode
-*max1363_match_mode(unsigned long *mask, const struct max1363_chip_info *ci)
+*max1363_match_mode(const unsigned long *mask,
+const struct max1363_chip_info *ci)
 {
 	int i;
 	if (mask)
@@ -189,7 +191,6 @@ static int max1363_read_single_chan(struct iio_dev *indio_dev,
 	int ret = 0;
 	s32 data;
 	char rxbuf[2];
-	const unsigned long *mask;
 	struct max1363_state *st = iio_priv(indio_dev);
 	struct i2c_client *client = st->client;
 
@@ -198,46 +199,38 @@ static int max1363_read_single_chan(struct iio_dev *indio_dev,
 	 * If monitor mode is enabled, the method for reading a single
 	 * channel will have to be rather different and has not yet
 	 * been implemented.
+	 *
+	 * Also, cannot read directly if buffered capture enabled.
 	 */
-	if (st->monitor_on) {
+	if (st->monitor_on || iio_buffer_enabled(indio_dev)) {
 		ret = -EBUSY;
 		goto error_ret;
 	}
 
-	/* If ring buffer capture is occurring, query the buffer */
-	if (iio_buffer_enabled(indio_dev)) {
-		mask = max1363_mode_table[chan->address].modemask;
-		data = max1363_single_channel_from_ring(mask, st);
+	/* Check to see if current scan mode is correct */
+	if (st->current_mode != &max1363_mode_table[chan->address]) {
+		/* Update scan mode if needed */
+		st->current_mode = &max1363_mode_table[chan->address];
+		ret = max1363_set_scan_mode(st);
+		if (ret < 0)
+			goto error_ret;
+	}
+	if (st->chip_info->bits != 8) {
+		/* Get reading */
+		data = i2c_master_recv(client, rxbuf, 2);
 		if (data < 0) {
 			ret = data;
 			goto error_ret;
 		}
+		data = (s32)(rxbuf[1]) | ((s32)(rxbuf[0] & 0x0F)) << 8;
 	} else {
-		/* Check to see if current scan mode is correct */
-		if (st->current_mode != &max1363_mode_table[chan->address]) {
-			/* Update scan mode if needed */
-			st->current_mode = &max1363_mode_table[chan->address];
-			ret = max1363_set_scan_mode(st);
-			if (ret < 0)
-				goto error_ret;
-		}
-		if (st->chip_info->bits != 8) {
-			/* Get reading */
-			data = i2c_master_recv(client, rxbuf, 2);
-			if (data < 0) {
-				ret = data;
-				goto error_ret;
-			}
-			data = (s32)(rxbuf[1]) | ((s32)(rxbuf[0] & 0x0F)) << 8;
-		} else {
-			/* Get reading */
-			data = i2c_master_recv(client, rxbuf, 1);
-			if (data < 0) {
-				ret = data;
-				goto error_ret;
-			}
-			data = rxbuf[0];
+		/* Get reading */
+		data = i2c_master_recv(client, rxbuf, 1);
+		if (data < 0) {
+			ret = data;
+			goto error_ret;
 		}
+		data = rxbuf[0];
 	}
 	*val = data;
 error_ret:
@@ -260,7 +253,7 @@ static int max1363_read_raw(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		if ((1 << (st->chip_info->bits + 1)) >
 		    st->chip_info->int_vref_mv) {
 			*val = 0;
@@ -288,7 +281,7 @@ static const enum max1363_modes max1363_mode_list[] = {
 #define MAX1363_EV_M						\
 	(IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING)	\
 	 | IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING))
-#define MAX1363_INFO_MASK (1 << IIO_CHAN_INFO_SCALE_SHARED)
+#define MAX1363_INFO_MASK IIO_CHAN_INFO_SCALE_SHARED_BIT
 #define MAX1363_CHAN_U(num, addr, si, bits, evmask)			\
 	{								\
 		.type = IIO_VOLTAGE,					\
@@ -296,7 +289,13 @@ static const enum max1363_modes max1363_mode_list[] = {
 		.channel = num,						\
 		.address = addr,					\
 		.info_mask = MAX1363_INFO_MASK,				\
-		.scan_type = IIO_ST('u', bits, (bits > 8) ? 16 : 8, 0), \
+		.datasheet_name = "AIN"#num,				\
+		.scan_type = {						\
+			.sign = 'u',					\
+			.realbits = bits,				\
+			.storagebits = (bits > 8) ? 16 : 8,		\
+			.endianness = IIO_BE,				\
+		},							\
 		.scan_index = si,					\
 		.event_mask = evmask,					\
 	}
@@ -311,7 +310,13 @@ static const enum max1363_modes max1363_mode_list[] = {
 		.channel2 = num2,					\
 		.address = addr,					\
 		.info_mask = MAX1363_INFO_MASK,				\
-		.scan_type = IIO_ST('u', bits, (bits > 8) ? 16 : 8, 0), \
+		.datasheet_name = "AIN"#num"-AIN"#num2,			\
+		.scan_type = {						\
+			.sign = 's',					\
+			.realbits = bits,				\
+			.storagebits = (bits > 8) ? 16 : 8,		\
+			.endianness = IIO_BE,				\
+		},							\
 		.scan_index = si,					\
 		.event_mask = evmask,					\
 	}
@@ -833,6 +838,7 @@ static const struct iio_info max1363_info = {
 	.read_event_config = &max1363_read_event_config,
 	.write_event_config = &max1363_write_event_config,
 	.read_raw = &max1363_read_raw,
+	.update_scan_mode = &max1363_update_scan_mode,
 	.driver_module = THIS_MODULE,
 	.event_attrs = &max1363_event_attribute_group,
 };
diff --git a/drivers/staging/iio/adc/max1363_ring.c b/drivers/staging/iio/adc/max1363_ring.c
index df6893e058c..f730b3fb971 100644
--- a/drivers/staging/iio/adc/max1363_ring.c
+++ b/drivers/staging/iio/adc/max1363_ring.c
@@ -15,88 +15,25 @@
 #include <linux/bitops.h>
 
 #include "../iio.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 #include "../trigger_consumer.h"
 
 #include "max1363.h"
 
-int max1363_single_channel_from_ring(const long *mask, struct max1363_state *st)
-{
-	struct iio_buffer *ring = iio_priv_to_dev(st)->buffer;
-	int count = 0, ret, index;
-	u8 *ring_data;
-	index = find_first_bit(mask, MAX1363_MAX_CHANNELS);
-
-	if (!(test_bit(index, st->current_mode->modemask))) {
-		ret = -EBUSY;
-		goto error_ret;
-	}
-
-	ring_data = kmalloc(ring->access->get_bytes_per_datum(ring),
-			    GFP_KERNEL);
-	if (ring_data == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	ret = ring->access->read_last(ring, ring_data);
-	if (ret)
-		goto error_free_ring_data;
-	/* Need a count of channels prior to this one */
-
-	count = bitmap_weight(mask, index - 1);
-	if (st->chip_info->bits != 8)
-		ret = ((int)(ring_data[count*2 + 0] & 0x0F) << 8)
-			+ (int)(ring_data[count*2 + 1]);
-	else
-		ret = ring_data[count];
-
-error_free_ring_data:
-	kfree(ring_data);
-error_ret:
-	return ret;
-}
-
-
-/**
- * max1363_ring_preenable() - setup the parameters of the ring before enabling
- *
- * The complex nature of the setting of the nuber of bytes per datum is due
- * to this driver currently ensuring that the timestamp is stored at an 8
- * byte boundary.
- **/
-static int max1363_ring_preenable(struct iio_dev *indio_dev)
+int max1363_update_scan_mode(struct iio_dev *indio_dev,
+			     const unsigned long *scan_mask)
 {
 	struct max1363_state *st = iio_priv(indio_dev);
-	struct iio_buffer *ring = indio_dev->buffer;
-	size_t d_size = 0;
-	unsigned long numvals;
 
 	/*
 	 * Need to figure out the current mode based upon the requested
 	 * scan mask in iio_dev
 	 */
-	st->current_mode = max1363_match_mode(ring->scan_mask,
-					st->chip_info);
+	st->current_mode = max1363_match_mode(scan_mask, st->chip_info);
 	if (!st->current_mode)
 		return -EINVAL;
-
 	max1363_set_scan_mode(st);
-
-	numvals = bitmap_weight(st->current_mode->modemask,
-				indio_dev->masklength);
-	if (ring->access->set_bytes_per_datum) {
-		if (ring->scan_timestamp)
-			d_size += sizeof(s64);
-		if (st->chip_info->bits != 8)
-			d_size += numvals*2;
-		else
-			d_size += numvals;
-		if (ring->scan_timestamp && (d_size % 8))
-			d_size += 8 - (d_size % 8);
-		ring->access->set_bytes_per_datum(ring, d_size);
-	}
-
 	return 0;
 }
 
@@ -114,12 +51,14 @@ static irqreturn_t max1363_trigger_handler(int irq, void *p)
 
 	/* Ensure the timestamp is 8 byte aligned */
 	if (st->chip_info->bits != 8)
-		d_size = numvals*2 + sizeof(s64);
+		d_size = numvals*2;
 	else
-		d_size = numvals + sizeof(s64);
-	if (d_size % sizeof(s64))
-		d_size += sizeof(s64) - (d_size % sizeof(s64));
-
+		d_size = numvals;
+	if (indio_dev->buffer->scan_timestamp) {
+		d_size += sizeof(s64);
+		if (d_size % sizeof(s64))
+			d_size += sizeof(s64) - (d_size % sizeof(s64));
+	}
 	/* Monitor mode prevents reading. Whilst not currently implemented
 	 * might as well have this test in here in the meantime as it does
 	 * no harm.
@@ -139,9 +78,10 @@ static irqreturn_t max1363_trigger_handler(int irq, void *p)
 
 	time_ns = iio_get_time_ns();
 
-	memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns));
+	if (indio_dev->buffer->scan_timestamp)
+		memcpy(rxbuf + d_size - sizeof(s64), &time_ns, sizeof(time_ns));
+	iio_push_to_buffer(indio_dev->buffer, rxbuf, time_ns);
 
-	indio_dev->buffer->access->store_to(indio_dev->buffer, rxbuf, time_ns);
 done:
 	iio_trigger_notify_done(indio_dev->trig);
 	kfree(rxbuf);
@@ -151,7 +91,7 @@ done:
 
 static const struct iio_buffer_setup_ops max1363_ring_setup_ops = {
 	.postenable = &iio_triggered_buffer_postenable,
-	.preenable = &max1363_ring_preenable,
+	.preenable = &iio_sw_buffer_preenable,
 	.predisable = &iio_triggered_buffer_predisable,
 };
 
@@ -179,7 +119,7 @@ int max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	/* Effectively select the ring buffer implementation */
 	indio_dev->buffer->access = &ring_sw_access_funcs;
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &max1363_ring_setup_ops;
+	indio_dev->setup_ops = &max1363_ring_setup_ops;
 
 	/* Flag that polled ring buffering is possible */
 	indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
diff --git a/drivers/staging/iio/addac/adt7316-spi.c b/drivers/staging/iio/addac/adt7316-spi.c
index 1e93c7b7aed..1ea3cd06299 100644
--- a/drivers/staging/iio/addac/adt7316-spi.c
+++ b/drivers/staging/iio/addac/adt7316-spi.c
@@ -151,7 +151,6 @@ static int adt7316_spi_resume(struct spi_device *spi_dev)
 static struct spi_driver adt7316_driver = {
 	.driver = {
 		.name = "adt7316",
-		.bus = &spi_bus_type,
 		.owner = THIS_MODULE,
 	},
 	.probe = adt7316_spi_probe,
diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
index 8df24704ff2..13c39292d3f 100644
--- a/drivers/staging/iio/addac/adt7316.c
+++ b/drivers/staging/iio/addac/adt7316.c
@@ -20,6 +20,7 @@
 #include <linux/module.h>
 
 #include "../iio.h"
+#include "../events.h"
 #include "../sysfs.h"
 #include "adt7316.h"
 
diff --git a/drivers/staging/iio/buffer_generic.h b/drivers/staging/iio/buffer.h
index 9e8f0100997..6fb6e64181a 100644
--- a/drivers/staging/iio/buffer_generic.h
+++ b/drivers/staging/iio/buffer.h
@@ -11,7 +11,6 @@
 #define _IIO_BUFFER_GENERIC_H_
 #include <linux/sysfs.h>
 #include "iio.h"
-#include "chrdev.h"
 
 #ifdef CONFIG_IIO_BUFFER
 
@@ -19,22 +18,14 @@ struct iio_buffer;
 
 /**
  * struct iio_buffer_access_funcs - access functions for buffers.
- * @mark_in_use:	reference counting, typically to prevent module removal
- * @unmark_in_use:	reduce reference count when no longer using buffer
  * @store_to:		actually store stuff to the buffer
- * @read_last:		get the last element stored
- * @read_first_n:	try to get a specified number of elements (must exist)
- * @mark_param_change:	notify buffer that some relevant parameter has changed
- *			Often this means the underlying storage may need to
- *			change.
+ * @read_first_n:	try to get a specified number of bytes (must exist)
  * @request_update:	if a parameter change has been marked, update underlying
  *			storage.
  * @get_bytes_per_datum:get current bytes per datum
  * @set_bytes_per_datum:set number of bytes per datum
  * @get_length:		get number of datums in buffer
  * @set_length:		set number of datums in buffer
- * @is_enabled:		query if buffer is currently being used
- * @enable:		enable the buffer
  *
  * The purpose of this structure is to make the buffer element
  * modular as event for a given driver, different usecases may require
@@ -45,85 +36,60 @@ struct iio_buffer;
  * any of them not existing.
  **/
 struct iio_buffer_access_funcs {
-	void (*mark_in_use)(struct iio_buffer *buffer);
-	void (*unmark_in_use)(struct iio_buffer *buffer);
-
 	int (*store_to)(struct iio_buffer *buffer, u8 *data, s64 timestamp);
-	int (*read_last)(struct iio_buffer *buffer, u8 *data);
 	int (*read_first_n)(struct iio_buffer *buffer,
 			    size_t n,
 			    char __user *buf);
 
-	int (*mark_param_change)(struct iio_buffer *buffer);
 	int (*request_update)(struct iio_buffer *buffer);
 
 	int (*get_bytes_per_datum)(struct iio_buffer *buffer);
 	int (*set_bytes_per_datum)(struct iio_buffer *buffer, size_t bpd);
 	int (*get_length)(struct iio_buffer *buffer);
 	int (*set_length)(struct iio_buffer *buffer, int length);
-
-	int (*is_enabled)(struct iio_buffer *buffer);
-	int (*enable)(struct iio_buffer *buffer);
-};
-
-/**
- * struct iio_buffer_setup_ops - buffer setup related callbacks
- * @preenable:		[DRIVER] function to run prior to marking buffer enabled
- * @postenable:		[DRIVER] function to run after marking buffer enabled
- * @predisable:		[DRIVER] function to run prior to marking buffer
- *			disabled
- * @postdisable:	[DRIVER] function to run after marking buffer disabled
- */
-struct iio_buffer_setup_ops {
-	int				(*preenable)(struct iio_dev *);
-	int				(*postenable)(struct iio_dev *);
-	int				(*predisable)(struct iio_dev *);
-	int				(*postdisable)(struct iio_dev *);
 };
 
 /**
  * struct iio_buffer - general buffer structure
- * @indio_dev:		industrial I/O device structure
- * @owner:		module that owns the buffer (for ref counting)
  * @length:		[DEVICE] number of datums in buffer
  * @bytes_per_datum:	[DEVICE] size of individual datum including timestamp
- * @bpe:		[DEVICE] size of individual channel value
  * @scan_el_attrs:	[DRIVER] control of scan elements if that scan mode
  *			control method is used
- * @scan_count:	[INTERN] the number of elements in the current scan mode
  * @scan_mask:		[INTERN] bitmask used in masking scan mode elements
+ * @scan_index_timestamp:[INTERN] cache of the index to the timestamp
  * @scan_timestamp:	[INTERN] does the scan mode include a timestamp
  * @access:		[DRIVER] buffer access functions associated with the
  *			implementation.
- * @flags:		[INTERN] file ops related flags including busy flag.
+ * @scan_el_dev_attr_list:[INTERN] list of scan element related attributes.
+ * @scan_el_group:	[DRIVER] attribute group for those attributes not
+ *			created from the iio_chan_info array.
+ * @pollq:		[INTERN] wait queue to allow for polling on the buffer.
+ * @stufftoread:	[INTERN] flag to indicate new data.
+ * @demux_list:		[INTERN] list of operations required to demux the scan.
+ * @demux_bounce:	[INTERN] buffer for doing gather from incoming scan.
  **/
 struct iio_buffer {
-	struct iio_dev				*indio_dev;
-	struct module				*owner;
 	int					length;
 	int					bytes_per_datum;
-	int					bpe;
 	struct attribute_group			*scan_el_attrs;
-	int					scan_count;
 	long					*scan_mask;
 	bool					scan_timestamp;
+	unsigned				scan_index_timestamp;
 	const struct iio_buffer_access_funcs	*access;
-	const struct iio_buffer_setup_ops		*setup_ops;
 	struct list_head			scan_el_dev_attr_list;
 	struct attribute_group			scan_el_group;
 	wait_queue_head_t			pollq;
 	bool					stufftoread;
-	unsigned long				flags;
 	const struct attribute_group *attrs;
+	struct list_head			demux_list;
+	unsigned char				*demux_bounce;
 };
 
 /**
  * iio_buffer_init() - Initialize the buffer structure
  * @buffer: buffer to be initialized
- * @indio_dev: the iio device the buffer is assocated with
  **/
-void iio_buffer_init(struct iio_buffer *buffer,
-			  struct iio_dev *indio_dev);
+void iio_buffer_init(struct iio_buffer *buffer);
 
 void iio_buffer_deinit(struct iio_buffer *buffer);
 
@@ -140,17 +106,27 @@ static inline void __iio_update_buffer(struct iio_buffer *buffer,
 	buffer->length = length;
 }
 
-int iio_scan_mask_query(struct iio_buffer *buffer, int bit);
+int iio_scan_mask_query(struct iio_dev *indio_dev,
+			struct iio_buffer *buffer, int bit);
 
 /**
  * iio_scan_mask_set() - set particular bit in the scan mask
  * @buffer: the buffer whose scan mask we are interested in
  * @bit: the bit to be set.
  **/
-int iio_scan_mask_set(struct iio_buffer *buffer, int bit);
+int iio_scan_mask_set(struct iio_dev *indio_dev,
+		      struct iio_buffer *buffer, int bit);
 
-#define to_iio_buffer(d)				\
-	container_of(d, struct iio_buffer, dev)
+/**
+ * iio_push_to_buffer() - push to a registered buffer.
+ * @buffer:		IIO buffer structure for device
+ * @scan:		Full scan.
+ * @timestamp:
+ */
+int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
+		       s64 timestamp);
+
+int iio_update_demux(struct iio_dev *indio_dev);
 
 /**
  * iio_buffer_register() - register the buffer with IIO core
@@ -180,12 +156,6 @@ ssize_t iio_buffer_write_length(struct device *dev,
 			      const char *buf,
 			      size_t len);
 /**
- * iio_buffer_read_bytes_per_datum() - attr for number of bytes in whole datum
- **/
-ssize_t iio_buffer_read_bytes_per_datum(struct device *dev,
-					struct device_attribute *attr,
-					char *buf);
-/**
  * iio_buffer_store_enable() - attr to turn the buffer on
  **/
 ssize_t iio_buffer_store_enable(struct device *dev,
@@ -201,9 +171,6 @@ ssize_t iio_buffer_show_enable(struct device *dev,
 #define IIO_BUFFER_LENGTH_ATTR DEVICE_ATTR(length, S_IRUGO | S_IWUSR,	\
 					   iio_buffer_read_length,	\
 					   iio_buffer_write_length)
-#define IIO_BUFFER_BYTES_PER_DATUM_ATTR					\
-	DEVICE_ATTR(bytes_per_datum, S_IRUGO | S_IWUSR,			\
-		    iio_buffer_read_bytes_per_datum, NULL)
 
 #define IIO_BUFFER_ENABLE_ATTR DEVICE_ATTR(enable, S_IRUGO | S_IWUSR,	\
 					   iio_buffer_show_enable,	\
diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c
index 47181875e11..b73007dcf4b 100644
--- a/drivers/staging/iio/cdc/ad7150.c
+++ b/drivers/staging/iio/cdc/ad7150.c
@@ -15,7 +15,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-
+#include "../events.h"
 /*
  * AD7150 registers definition
  */
@@ -111,7 +111,7 @@ static int ad7150_read_raw(struct iio_dev *indio_dev,
 			return ret;
 		*val = swab16(ret);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE):
+	case IIO_CHAN_INFO_AVERAGE_RAW:
 		ret = i2c_smbus_read_word_data(chip->client,
 					ad7150_addresses[chan->channel][1]);
 		if (ret < 0)
@@ -429,7 +429,7 @@ static const struct iio_chan_spec ad7150_channels[] = {
 		.type = IIO_CAPACITANCE,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE_BIT,
 		.event_mask =
 		IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) |
 		IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING) |
@@ -441,7 +441,7 @@ static const struct iio_chan_spec ad7150_channels[] = {
 		.type = IIO_CAPACITANCE,
 		.indexed = 1,
 		.channel = 1,
-		.info_mask = (1 << IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE_BIT,
 		.event_mask =
 		IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) |
 		IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING) |
diff --git a/drivers/staging/iio/cdc/ad7152.c b/drivers/staging/iio/cdc/ad7152.c
index 152d3be6d97..fdb83c35e6d 100644
--- a/drivers/staging/iio/cdc/ad7152.c
+++ b/drivers/staging/iio/cdc/ad7152.c
@@ -259,7 +259,7 @@ static int ad7152_write_raw(struct iio_dev *indio_dev,
 	mutex_lock(&indio_dev->mlock);
 
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		if (val != 1) {
 			ret = -EINVAL;
 			goto out;
@@ -276,7 +276,7 @@ static int ad7152_write_raw(struct iio_dev *indio_dev,
 		ret = 0;
 		break;
 
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		if ((val < 0) | (val > 0xFFFF)) {
 			ret = -EINVAL;
 			goto out;
@@ -289,7 +289,7 @@ static int ad7152_write_raw(struct iio_dev *indio_dev,
 
 		ret = 0;
 		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		if (val != 0) {
 			ret = -EINVAL;
 			goto out;
@@ -372,7 +372,7 @@ static int ad7152_read_raw(struct iio_dev *indio_dev,
 
 		ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 
 		ret = i2c_smbus_read_word_data(chip->client,
 				ad7152_addresses[chan->channel][AD7152_GAIN]);
@@ -384,7 +384,7 @@ static int ad7152_read_raw(struct iio_dev *indio_dev,
 
 		ret = IIO_VAL_INT_PLUS_MICRO;
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		ret = i2c_smbus_read_word_data(chip->client,
 				ad7152_addresses[chan->channel][AD7152_OFFS]);
 		if (ret < 0)
@@ -393,7 +393,7 @@ static int ad7152_read_raw(struct iio_dev *indio_dev,
 
 		ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		ret = i2c_smbus_read_byte_data(chip->client,
 				ad7152_addresses[chan->channel][AD7152_SETUP]);
 		if (ret < 0)
@@ -416,7 +416,7 @@ static int ad7152_write_raw_get_fmt(struct iio_dev *indio_dev,
 			       long mask)
 {
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		return IIO_VAL_INT_PLUS_NANO;
 	default:
 		return IIO_VAL_INT_PLUS_MICRO;
@@ -436,34 +436,34 @@ static const struct iio_chan_spec ad7152_channels[] = {
 		.type = IIO_CAPACITANCE,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 	}, {
 		.type = IIO_CAPACITANCE,
 		.differential = 1,
 		.indexed = 1,
 		.channel = 0,
 		.channel2 = 2,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 	}, {
 		.type = IIO_CAPACITANCE,
 		.indexed = 1,
 		.channel = 1,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 	}, {
 		.type = IIO_CAPACITANCE,
 		.differential = 1,
 		.indexed = 1,
 		.channel = 1,
 		.channel2 = 3,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 	}
 };
 /*
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c
index 9df590891a6..40b8512cbc3 100644
--- a/drivers/staging/iio/cdc/ad7746.c
+++ b/drivers/staging/iio/cdc/ad7746.c
@@ -123,7 +123,7 @@ static const struct iio_chan_spec ad7746_channels[] = {
 		.type = IIO_VOLTAGE,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = AD7746_REG_VT_DATA_HIGH << 8 |
 			AD7746_VTSETUP_VTMD_EXT_VIN,
 	},
@@ -132,7 +132,7 @@ static const struct iio_chan_spec ad7746_channels[] = {
 		.indexed = 1,
 		.channel = 1,
 		.extend_name = "supply",
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = AD7746_REG_VT_DATA_HIGH << 8 |
 			AD7746_VTSETUP_VTMD_VDD_MON,
 	},
@@ -156,10 +156,10 @@ static const struct iio_chan_spec ad7746_channels[] = {
 		.type = IIO_CAPACITANCE,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SHARED) |
-		(1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SHARED_BIT |
+		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = AD7746_REG_CAP_DATA_HIGH << 8,
 	},
 	[CIN1_DIFF] = {
@@ -168,10 +168,10 @@ static const struct iio_chan_spec ad7746_channels[] = {
 		.indexed = 1,
 		.channel = 0,
 		.channel2 = 2,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SHARED) |
-		(1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SHARED_BIT |
+		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = AD7746_REG_CAP_DATA_HIGH << 8 |
 			AD7746_CAPSETUP_CAPDIFF
 	},
@@ -179,10 +179,10 @@ static const struct iio_chan_spec ad7746_channels[] = {
 		.type = IIO_CAPACITANCE,
 		.indexed = 1,
 		.channel = 1,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SHARED) |
-		(1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SHARED_BIT |
+		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = AD7746_REG_CAP_DATA_HIGH << 8 |
 			AD7746_CAPSETUP_CIN2,
 	},
@@ -192,10 +192,10 @@ static const struct iio_chan_spec ad7746_channels[] = {
 		.indexed = 1,
 		.channel = 1,
 		.channel2 = 3,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SHARED) |
-		(1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_CALIBBIAS_SHARED_BIT |
+		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = AD7746_REG_CAP_DATA_HIGH << 8 |
 			AD7746_CAPSETUP_CAPDIFF | AD7746_CAPSETUP_CIN2,
 	}
@@ -477,7 +477,7 @@ static int ad7746_write_raw(struct iio_dev *indio_dev,
 	mutex_lock(&indio_dev->mlock);
 
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		if (val != 1) {
 			ret = -EINVAL;
 			goto out;
@@ -503,7 +503,7 @@ static int ad7746_write_raw(struct iio_dev *indio_dev,
 
 		ret = 0;
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SHARED):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		if ((val < 0) | (val > 0xFFFF)) {
 			ret = -EINVAL;
 			goto out;
@@ -515,7 +515,7 @@ static int ad7746_write_raw(struct iio_dev *indio_dev,
 
 		ret = 0;
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		if ((val < 0) | (val > 43008000)) { /* 21pF */
 			ret = -EINVAL;
 			goto out;
@@ -612,7 +612,7 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
 
 		ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		switch (chan->type) {
 		case IIO_CAPACITANCE:
 			reg = AD7746_REG_CAP_GAINH;
@@ -634,7 +634,7 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
 
 		ret = IIO_VAL_INT_PLUS_MICRO;
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SHARED):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		ret = i2c_smbus_read_word_data(chip->client,
 					       AD7746_REG_CAP_OFFH);
 		if (ret < 0)
@@ -643,13 +643,13 @@ static int ad7746_read_raw(struct iio_dev *indio_dev,
 
 		ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = AD7746_CAPDAC_DACP(chip->capdac[chan->channel]
 			[chan->differential]) * 338646;
 
 		ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_CAPACITANCE:
 			/* 8.192pf / 2^24 */
diff --git a/drivers/staging/iio/chrdev.h b/drivers/staging/iio/chrdev.h
deleted file mode 100644
index d8e736f6052..00000000000
--- a/drivers/staging/iio/chrdev.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* The industrial I/O core - character device related
- *
- * Copyright (c) 2008 Jonathan Cameron
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- */
-
-#ifndef _IIO_CHRDEV_H_
-#define _IIO_CHRDEV_H_
-
-/**
- * struct iio_event_data - The actual event being pushed to userspace
- * @id:		event identifier
- * @timestamp:	best estimate of time of event occurrence (often from
- *		the interrupt handler)
- */
-struct iio_event_data {
-	u64	id;
-	s64	timestamp;
-};
-
-#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
-#endif
diff --git a/drivers/staging/iio/dac/Kconfig b/drivers/staging/iio/dac/Kconfig
index fac8549dc8e..13e27979df2 100644
--- a/drivers/staging/iio/dac/Kconfig
+++ b/drivers/staging/iio/dac/Kconfig
@@ -24,6 +24,29 @@ config AD5360
 	  To compile this driver as module choose M here: the module will be called
 	  ad5360.
 
+config AD5380
+	tristate "Analog Devices AD5380/81/82/83/84/90/91/92 DAC driver"
+	depends on (SPI_MASTER || I2C)
+	select REGMAP_I2C if I2C
+	select REGMAP_SPI if SPI_MASTER
+	help
+	  Say yes here to build support for Analog Devices AD5380, AD5381,
+	  AD5382, AD5383, AD5384, AD5390, AD5391, AD5392 multi-channel
+	  Digital to Analog Converters (DAC).
+
+	  To compile this driver as module choose M here: the module will be called
+	  ad5380.
+
+config AD5421
+	tristate "Analog Devices AD5421 DAC driver"
+	depends on SPI
+	help
+	  Say yes here to build support for Analog Devices AD5421 loop-powered
+	  digital-to-analog convertors (DAC).
+
+	  To compile this driver as module choose M here: the module will be called
+	  ad5421.
+
 config AD5624R_SPI
 	tristate "Analog Devices AD5624/44/64R DAC spi driver"
 	depends on SPI
@@ -37,7 +60,7 @@ config AD5446
 	help
 	  Say yes here to build support for Analog Devices AD5444, AD5446,
 	  AD5512A, AD5542A, AD5543, AD5553, AD5601, AD5611, AD5620, AD5621,
-	  AD5640, AD5660 DACs.
+	  AD5640, AD5660, AD5662 DACs.
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad5446.
@@ -52,12 +75,22 @@ config AD5504
 	  To compile this driver as a module, choose M here: the
 	  module will be called ad5504.
 
+config AD5764
+	tristate "Analog Devices AD5764/64R/44/44R DAC driver"
+	depends on SPI_MASTER
+	help
+	  Say yes here to build support for Analog Devices AD5764, AD5764R, AD5744,
+	  AD5744R Digital to Analog Converter.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad5764.
+
 config AD5791
-	tristate "Analog Devices AD5760/AD5780/AD5781/AD5791 DAC SPI driver"
+	tristate "Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC SPI driver"
 	depends on SPI
 	help
 	  Say yes here to build support for Analog Devices AD5760, AD5780,
-	  AD5781, AD5791 High Resolution Voltage Output Digital to
+	  AD5781, AD5790, AD5791 High Resolution Voltage Output Digital to
 	  Analog Converter.
 
 	  To compile this driver as a module, choose M here: the
diff --git a/drivers/staging/iio/dac/Makefile b/drivers/staging/iio/dac/Makefile
index 07b6f5ebdb5..8ab1d264aab 100644
--- a/drivers/staging/iio/dac/Makefile
+++ b/drivers/staging/iio/dac/Makefile
@@ -3,10 +3,13 @@
 #
 
 obj-$(CONFIG_AD5360) += ad5360.o
+obj-$(CONFIG_AD5380) += ad5380.o
+obj-$(CONFIG_AD5421) += ad5421.o
 obj-$(CONFIG_AD5624R_SPI) += ad5624r_spi.o
 obj-$(CONFIG_AD5064) += ad5064.o
 obj-$(CONFIG_AD5504) += ad5504.o
 obj-$(CONFIG_AD5446) += ad5446.o
+obj-$(CONFIG_AD5764) += ad5764.o
 obj-$(CONFIG_AD5791) += ad5791.o
 obj-$(CONFIG_AD5686) += ad5686.o
 obj-$(CONFIG_MAX517) += max517.o
diff --git a/drivers/staging/iio/dac/ad5064.c b/drivers/staging/iio/dac/ad5064.c
index 39cfe6cb02a..049a855039c 100644
--- a/drivers/staging/iio/dac/ad5064.c
+++ b/drivers/staging/iio/dac/ad5064.c
@@ -91,7 +91,7 @@ enum ad5064_type {
 	.indexed = 1,						\
 	.output = 1,						\
 	.channel = (chan),					\
-	.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),	\
+	.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,	\
 	.address = AD5064_ADDR_DAC(chan),			\
 	.scan_type = IIO_ST('u', (bits), 16, 20 - (bits))	\
 }
@@ -280,14 +280,14 @@ static int ad5064_read_raw(struct iio_dev *indio_dev,
 			   long m)
 {
 	struct ad5064_state *st = iio_priv(indio_dev);
-	unsigned long scale_uv;
 	unsigned int vref;
+	int scale_uv;
 
 	switch (m) {
 	case 0:
 		*val = st->dac_cache[chan->channel];
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		vref = st->chip_info->shared_vref ? 0 : chan->channel;
 		scale_uv = regulator_get_voltage(st->vref_reg[vref].consumer);
 		if (scale_uv < 0)
diff --git a/drivers/staging/iio/dac/ad5360.c b/drivers/staging/iio/dac/ad5360.c
index bc0459e32d0..710b256affc 100644
--- a/drivers/staging/iio/dac/ad5360.c
+++ b/drivers/staging/iio/dac/ad5360.c
@@ -103,10 +103,10 @@ enum ad5360_type {
 	.type = IIO_VOLTAGE,					\
 	.indexed = 1,						\
 	.output = 1,						\
-	.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE) |	\
-		(1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |		\
-		(1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |	\
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),	\
+	.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT |	\
+		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |		\
+		IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |	\
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,	\
 	.scan_type = IIO_ST('u', (bits), 16, 16 - (bits))	\
 }
 
@@ -326,21 +326,21 @@ static int ad5360_write_raw(struct iio_dev *indio_dev,
 		return ad5360_write(indio_dev, AD5360_CMD_WRITE_DATA,
 				 chan->address, val, chan->scan_type.shift);
 
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		if (val >= max_val || val < 0)
 			return -EINVAL;
 
 		return ad5360_write(indio_dev, AD5360_CMD_WRITE_OFFSET,
 				 chan->address, val, chan->scan_type.shift);
 
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		if (val >= max_val || val < 0)
 			return -EINVAL;
 
 		return ad5360_write(indio_dev, AD5360_CMD_WRITE_GAIN,
 				 chan->address, val, chan->scan_type.shift);
 
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		if (val <= -max_val || val > 0)
 			return -EINVAL;
 
@@ -371,8 +371,8 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
 			   long m)
 {
 	struct ad5360_state *st = iio_priv(indio_dev);
-	unsigned long scale_uv;
 	unsigned int ofs_index;
+	int scale_uv;
 	int ret;
 
 	switch (m) {
@@ -383,7 +383,7 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
 			return ret;
 		*val = ret >> chan->scan_type.shift;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		/* vout = 4 * vref * dac_code */
 		scale_uv = ad5360_get_channel_vref(st, chan->channel) * 4 * 100;
 		if (scale_uv < 0)
@@ -393,21 +393,21 @@ static int ad5360_read_raw(struct iio_dev *indio_dev,
 		*val =  scale_uv / 100000;
 		*val2 = (scale_uv % 100000) * 10;
 		return IIO_VAL_INT_PLUS_MICRO;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		ret = ad5360_read(indio_dev, AD5360_READBACK_OFFSET,
 			chan->address);
 		if (ret < 0)
 			return ret;
 		*val = ret;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		ret = ad5360_read(indio_dev, AD5360_READBACK_GAIN,
 			chan->address);
 		if (ret < 0)
 			return ret;
 		*val = ret;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		ofs_index = ad5360_get_channel_vref_index(st, chan->channel);
 		ret = ad5360_read(indio_dev, AD5360_READBACK_SF,
 			AD5360_REG_SF_OFS(ofs_index));
diff --git a/drivers/staging/iio/dac/ad5380.c b/drivers/staging/iio/dac/ad5380.c
new file mode 100644
index 00000000000..eff97ae05c4
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5380.c
@@ -0,0 +1,676 @@
+/*
+ * Analog devices AD5380, AD5381, AD5382, AD5383, AD5390, AD5391, AD5392
+ * multi-channel Digital to Analog Converters driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "dac.h"
+
+
+#define AD5380_REG_DATA(x)	(((x) << 2) | 3)
+#define AD5380_REG_OFFSET(x)	(((x) << 2) | 2)
+#define AD5380_REG_GAIN(x)	(((x) << 2) | 1)
+#define AD5380_REG_SF_PWR_DOWN	(8 << 2)
+#define AD5380_REG_SF_PWR_UP	(9 << 2)
+#define AD5380_REG_SF_CTRL	(12 << 2)
+
+#define AD5380_CTRL_PWR_DOWN_MODE_OFFSET	13
+#define AD5380_CTRL_INT_VREF_2V5		BIT(12)
+#define AD5380_CTRL_INT_VREF_EN			BIT(10)
+
+/**
+ * struct ad5380_chip_info - chip specific information
+ * @channel_template:	channel specification template
+ * @num_channels:	number of channels
+ * @int_vref:		internal vref in uV
+*/
+
+struct ad5380_chip_info {
+	struct iio_chan_spec	channel_template;
+	unsigned int		num_channels;
+	unsigned int		int_vref;
+};
+
+/**
+ * struct ad5380_state - driver instance specific data
+ * @regmap:		regmap instance used by the device
+ * @chip_info:		chip model specific constants, available modes etc
+ * @vref_reg:		vref supply regulator
+ * @vref:		actual reference voltage used in uA
+ * @pwr_down:		whether the chip is currently in power down mode
+ */
+
+struct ad5380_state {
+	struct regmap			*regmap;
+	const struct ad5380_chip_info	*chip_info;
+	struct regulator		*vref_reg;
+	int				vref;
+	bool				pwr_down;
+};
+
+enum ad5380_type {
+	ID_AD5380_3,
+	ID_AD5380_5,
+	ID_AD5381_3,
+	ID_AD5381_5,
+	ID_AD5382_3,
+	ID_AD5382_5,
+	ID_AD5383_3,
+	ID_AD5383_5,
+	ID_AD5390_3,
+	ID_AD5390_5,
+	ID_AD5391_3,
+	ID_AD5391_5,
+	ID_AD5392_3,
+	ID_AD5392_5,
+};
+
+#define AD5380_CHANNEL(_bits) {					\
+	.type = IIO_VOLTAGE,					\
+	.indexed = 1,						\
+	.output = 1,						\
+	.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT |		\
+		IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |		\
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,		\
+	.scan_type = IIO_ST('u', (_bits), 16, 14 - (_bits))	\
+}
+
+static const struct ad5380_chip_info ad5380_chip_info_tbl[] = {
+	[ID_AD5380_3] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 40,
+		.int_vref = 1250000,
+	},
+	[ID_AD5380_5] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 40,
+		.int_vref = 2500000,
+	},
+	[ID_AD5381_3] = {
+		.channel_template = AD5380_CHANNEL(12),
+		.num_channels = 16,
+		.int_vref = 1250000,
+	},
+	[ID_AD5381_5] = {
+		.channel_template = AD5380_CHANNEL(12),
+		.num_channels = 16,
+		.int_vref = 2500000,
+	},
+	[ID_AD5382_3] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 32,
+		.int_vref = 1250000,
+	},
+	[ID_AD5382_5] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 32,
+		.int_vref = 2500000,
+	},
+	[ID_AD5383_3] = {
+		.channel_template = AD5380_CHANNEL(12),
+		.num_channels = 32,
+		.int_vref = 1250000,
+	},
+	[ID_AD5383_5] = {
+		.channel_template = AD5380_CHANNEL(12),
+		.num_channels = 32,
+		.int_vref = 2500000,
+	},
+	[ID_AD5390_3] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 16,
+		.int_vref = 1250000,
+	},
+	[ID_AD5390_5] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 16,
+		.int_vref = 2500000,
+	},
+	[ID_AD5391_3] = {
+		.channel_template = AD5380_CHANNEL(12),
+		.num_channels = 16,
+		.int_vref = 1250000,
+	},
+	[ID_AD5391_5] = {
+		.channel_template = AD5380_CHANNEL(12),
+		.num_channels = 16,
+		.int_vref = 2500000,
+	},
+	[ID_AD5392_3] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 8,
+		.int_vref = 1250000,
+	},
+	[ID_AD5392_5] = {
+		.channel_template = AD5380_CHANNEL(14),
+		.num_channels = 8,
+		.int_vref = 2500000,
+	},
+};
+
+static ssize_t ad5380_read_dac_powerdown(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5380_state *st = iio_priv(indio_dev);
+
+	return sprintf(buf, "%d\n", st->pwr_down);
+}
+
+static ssize_t ad5380_write_dac_powerdown(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5380_state *st = iio_priv(indio_dev);
+	bool pwr_down;
+	int ret;
+
+	ret = strtobool(buf, &pwr_down);
+	if (ret)
+		return ret;
+
+	mutex_lock(&indio_dev->mlock);
+
+	if (pwr_down)
+		ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_DOWN, 0);
+	else
+		ret = regmap_write(st->regmap, AD5380_REG_SF_PWR_UP, 0);
+
+	st->pwr_down = pwr_down;
+
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret ? ret : len;
+}
+
+static IIO_DEVICE_ATTR(out_voltage_powerdown,
+			S_IRUGO | S_IWUSR,
+			ad5380_read_dac_powerdown,
+			ad5380_write_dac_powerdown, 0);
+
+static const char ad5380_powerdown_modes[][15] = {
+	[0]	= "100kohm_to_gnd",
+	[1]	= "three_state",
+};
+
+static ssize_t ad5380_read_powerdown_mode(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5380_state *st = iio_priv(indio_dev);
+	unsigned int mode;
+	int ret;
+
+	ret = regmap_read(st->regmap, AD5380_REG_SF_CTRL, &mode);
+	if (ret)
+		return ret;
+
+	mode = (mode >> AD5380_CTRL_PWR_DOWN_MODE_OFFSET) & 1;
+
+	return sprintf(buf, "%s\n", ad5380_powerdown_modes[mode]);
+}
+
+static ssize_t ad5380_write_powerdown_mode(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5380_state *st = iio_priv(indio_dev);
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(ad5380_powerdown_modes); ++i) {
+		if (sysfs_streq(buf, ad5380_powerdown_modes[i]))
+			break;
+	}
+
+	if (i == ARRAY_SIZE(ad5380_powerdown_modes))
+		return -EINVAL;
+
+	ret = regmap_update_bits(st->regmap, AD5380_REG_SF_CTRL,
+		1 << AD5380_CTRL_PWR_DOWN_MODE_OFFSET,
+		i << AD5380_CTRL_PWR_DOWN_MODE_OFFSET);
+
+	return ret ? ret : len;
+}
+
+static IIO_DEVICE_ATTR(out_voltage_powerdown_mode,
+			S_IRUGO | S_IWUSR,
+			ad5380_read_powerdown_mode,
+			ad5380_write_powerdown_mode, 0);
+
+static IIO_CONST_ATTR(out_voltage_powerdown_mode_available,
+			"100kohm_to_gnd three_state");
+
+static struct attribute *ad5380_attributes[] = {
+	&iio_dev_attr_out_voltage_powerdown.dev_attr.attr,
+	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
+	&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
+	NULL,
+};
+
+static const struct attribute_group ad5380_attribute_group = {
+	.attrs = ad5380_attributes,
+};
+
+static unsigned int ad5380_info_to_reg(struct iio_chan_spec const *chan,
+	long info)
+{
+	switch (info) {
+	case 0:
+		return AD5380_REG_DATA(chan->address);
+	case IIO_CHAN_INFO_CALIBBIAS:
+		return AD5380_REG_OFFSET(chan->address);
+	case IIO_CHAN_INFO_CALIBSCALE:
+		return AD5380_REG_GAIN(chan->address);
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int ad5380_write_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int val, int val2, long info)
+{
+	const unsigned int max_val = (1 << chan->scan_type.realbits);
+	struct ad5380_state *st = iio_priv(indio_dev);
+
+	switch (info) {
+	case 0:
+	case IIO_CHAN_INFO_CALIBSCALE:
+		if (val >= max_val || val < 0)
+			return -EINVAL;
+
+		return regmap_write(st->regmap,
+			ad5380_info_to_reg(chan, info),
+			val << chan->scan_type.shift);
+	case IIO_CHAN_INFO_CALIBBIAS:
+		val += (1 << chan->scan_type.realbits) / 2;
+		if (val >= max_val || val < 0)
+			return -EINVAL;
+
+		return regmap_write(st->regmap,
+			AD5380_REG_OFFSET(chan->address),
+			val << chan->scan_type.shift);
+	default:
+		break;
+	}
+	return -EINVAL;
+}
+
+static int ad5380_read_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int *val, int *val2, long info)
+{
+	struct ad5380_state *st = iio_priv(indio_dev);
+	unsigned long scale_uv;
+	int ret;
+
+	switch (info) {
+	case 0:
+	case IIO_CHAN_INFO_CALIBSCALE:
+		ret = regmap_read(st->regmap, ad5380_info_to_reg(chan, info),
+					val);
+		if (ret)
+			return ret;
+		*val >>= chan->scan_type.shift;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		ret = regmap_read(st->regmap, AD5380_REG_OFFSET(chan->address),
+					val);
+		if (ret)
+			return ret;
+		*val >>= chan->scan_type.shift;
+		val -= (1 << chan->scan_type.realbits) / 2;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		scale_uv = ((2 * st->vref) >> chan->scan_type.realbits) * 100;
+		*val =  scale_uv / 100000;
+		*val2 = (scale_uv % 100000) * 10;
+		return IIO_VAL_INT_PLUS_MICRO;
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info ad5380_info = {
+	.read_raw = ad5380_read_raw,
+	.write_raw = ad5380_write_raw,
+	.attrs = &ad5380_attribute_group,
+	.driver_module = THIS_MODULE,
+};
+
+static int __devinit ad5380_alloc_channels(struct iio_dev *indio_dev)
+{
+	struct ad5380_state *st = iio_priv(indio_dev);
+	struct iio_chan_spec *channels;
+	unsigned int i;
+
+	channels = kcalloc(sizeof(struct iio_chan_spec),
+			st->chip_info->num_channels, GFP_KERNEL);
+
+	if (!channels)
+		return -ENOMEM;
+
+	for (i = 0; i < st->chip_info->num_channels; ++i) {
+		channels[i] = st->chip_info->channel_template;
+		channels[i].channel = i;
+		channels[i].address = i;
+	}
+
+	indio_dev->channels = channels;
+
+	return 0;
+}
+
+static int __devinit ad5380_probe(struct device *dev, struct regmap *regmap,
+	enum ad5380_type type, const char *name)
+{
+	struct iio_dev *indio_dev;
+	struct ad5380_state *st;
+	unsigned int ctrl = 0;
+	int ret;
+
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		dev_err(dev, "Failed to allocate iio device\n");
+		ret = -ENOMEM;
+		goto error_regmap_exit;
+	}
+
+	st = iio_priv(indio_dev);
+	dev_set_drvdata(dev, indio_dev);
+
+	st->chip_info = &ad5380_chip_info_tbl[type];
+	st->regmap = regmap;
+
+	indio_dev->dev.parent = dev;
+	indio_dev->name = name;
+	indio_dev->info = &ad5380_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->num_channels = st->chip_info->num_channels;
+
+	ret = ad5380_alloc_channels(indio_dev);
+	if (ret) {
+		dev_err(dev, "Failed to allocate channel spec: %d\n", ret);
+		goto error_free;
+	}
+
+	if (st->chip_info->int_vref == 2500000)
+		ctrl |= AD5380_CTRL_INT_VREF_2V5;
+
+	st->vref_reg = regulator_get(dev, "vref");
+	if (!IS_ERR(st->vref_reg)) {
+		ret = regulator_enable(st->vref_reg);
+		if (ret) {
+			dev_err(dev, "Failed to enable vref regulators: %d\n",
+				ret);
+			goto error_free_reg;
+		}
+
+		st->vref = regulator_get_voltage(st->vref_reg);
+	} else {
+		st->vref = st->chip_info->int_vref;
+		ctrl |= AD5380_CTRL_INT_VREF_EN;
+	}
+
+	ret = regmap_write(st->regmap, AD5380_REG_SF_CTRL, ctrl);
+	if (ret) {
+		dev_err(dev, "Failed to write to device: %d\n", ret);
+		goto error_disable_reg;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(dev, "Failed to register iio device: %d\n", ret);
+		goto error_disable_reg;
+	}
+
+	return 0;
+
+error_disable_reg:
+	if (!IS_ERR(st->vref_reg))
+		regulator_disable(st->vref_reg);
+error_free_reg:
+	if (!IS_ERR(st->vref_reg))
+		regulator_put(st->vref_reg);
+
+	kfree(indio_dev->channels);
+error_free:
+	iio_free_device(indio_dev);
+error_regmap_exit:
+	regmap_exit(regmap);
+
+	return ret;
+}
+
+static int __devexit ad5380_remove(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct ad5380_state *st = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	kfree(indio_dev->channels);
+
+	if (!IS_ERR(st->vref_reg)) {
+		regulator_disable(st->vref_reg);
+		regulator_put(st->vref_reg);
+	}
+
+	regmap_exit(st->regmap);
+	iio_free_device(indio_dev);
+
+	return 0;
+}
+
+static bool ad5380_reg_false(struct device *dev, unsigned int reg)
+{
+	return false;
+}
+
+static const struct regmap_config ad5380_regmap_config = {
+	.reg_bits = 10,
+	.val_bits = 14,
+
+	.max_register = AD5380_REG_DATA(40),
+	.cache_type = REGCACHE_RBTREE,
+
+	.volatile_reg = ad5380_reg_false,
+	.readable_reg = ad5380_reg_false,
+};
+
+#if IS_ENABLED(CONFIG_SPI_MASTER)
+
+static int __devinit ad5380_spi_probe(struct spi_device *spi)
+{
+	const struct spi_device_id *id = spi_get_device_id(spi);
+	struct regmap *regmap;
+
+	regmap = regmap_init_spi(spi, &ad5380_regmap_config);
+
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return ad5380_probe(&spi->dev, regmap, id->driver_data, id->name);
+}
+
+static int __devexit ad5380_spi_remove(struct spi_device *spi)
+{
+	return ad5380_remove(&spi->dev);
+}
+
+static const struct spi_device_id ad5380_spi_ids[] = {
+	{ "ad5380-3", ID_AD5380_3 },
+	{ "ad5380-5", ID_AD5380_5 },
+	{ "ad5381-3", ID_AD5381_3 },
+	{ "ad5381-5", ID_AD5381_5 },
+	{ "ad5382-3", ID_AD5382_3 },
+	{ "ad5382-5", ID_AD5382_5 },
+	{ "ad5383-3", ID_AD5383_3 },
+	{ "ad5383-5", ID_AD5383_5 },
+	{ "ad5384-3", ID_AD5380_3 },
+	{ "ad5384-5", ID_AD5380_5 },
+	{ "ad5390-3", ID_AD5390_3 },
+	{ "ad5390-5", ID_AD5390_5 },
+	{ "ad5391-3", ID_AD5391_3 },
+	{ "ad5391-5", ID_AD5391_5 },
+	{ "ad5392-3", ID_AD5392_3 },
+	{ "ad5392-5", ID_AD5392_5 },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, ad5380_spi_ids);
+
+static struct spi_driver ad5380_spi_driver = {
+	.driver = {
+		   .name = "ad5380",
+		   .owner = THIS_MODULE,
+	},
+	.probe = ad5380_spi_probe,
+	.remove = __devexit_p(ad5380_spi_remove),
+	.id_table = ad5380_spi_ids,
+};
+
+static inline int ad5380_spi_register_driver(void)
+{
+	return spi_register_driver(&ad5380_spi_driver);
+}
+
+static inline void ad5380_spi_unregister_driver(void)
+{
+	spi_unregister_driver(&ad5380_spi_driver);
+}
+
+#else
+
+static inline int ad5380_spi_register_driver(void)
+{
+	return 0;
+}
+
+static inline void ad5380_spi_unregister_driver(void)
+{
+}
+
+#endif
+
+#if IS_ENABLED(CONFIG_I2C)
+
+static int __devinit ad5380_i2c_probe(struct i2c_client *i2c,
+	const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+
+	regmap = regmap_init_i2c(i2c, &ad5380_regmap_config);
+
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return ad5380_probe(&i2c->dev, regmap, id->driver_data, id->name);
+}
+
+static int __devexit ad5380_i2c_remove(struct i2c_client *i2c)
+{
+	return ad5380_remove(&i2c->dev);
+}
+
+static const struct i2c_device_id ad5380_i2c_ids[] = {
+	{ "ad5380-3", ID_AD5380_3 },
+	{ "ad5380-5", ID_AD5380_5 },
+	{ "ad5381-3", ID_AD5381_3 },
+	{ "ad5381-5", ID_AD5381_5 },
+	{ "ad5382-3", ID_AD5382_3 },
+	{ "ad5382-5", ID_AD5382_5 },
+	{ "ad5383-3", ID_AD5383_3 },
+	{ "ad5383-5", ID_AD5383_5 },
+	{ "ad5384-3", ID_AD5380_3 },
+	{ "ad5384-5", ID_AD5380_5 },
+	{ "ad5390-3", ID_AD5390_3 },
+	{ "ad5390-5", ID_AD5390_5 },
+	{ "ad5391-3", ID_AD5391_3 },
+	{ "ad5391-5", ID_AD5391_5 },
+	{ "ad5392-3", ID_AD5392_3 },
+	{ "ad5392-5", ID_AD5392_5 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, ad5380_i2c_ids);
+
+static struct i2c_driver ad5380_i2c_driver = {
+	.driver = {
+		   .name = "ad5380",
+		   .owner = THIS_MODULE,
+	},
+	.probe = ad5380_i2c_probe,
+	.remove = __devexit_p(ad5380_i2c_remove),
+	.id_table = ad5380_i2c_ids,
+};
+
+static inline int ad5380_i2c_register_driver(void)
+{
+	return i2c_add_driver(&ad5380_i2c_driver);
+}
+
+static inline void ad5380_i2c_unregister_driver(void)
+{
+	i2c_del_driver(&ad5380_i2c_driver);
+}
+
+#else
+
+static inline int ad5380_i2c_register_driver(void)
+{
+	return 0;
+}
+
+static inline void ad5380_i2c_unregister_driver(void)
+{
+}
+
+#endif
+
+static int __init ad5380_spi_init(void)
+{
+	int ret;
+
+	ret = ad5380_spi_register_driver();
+	if (ret)
+		return ret;
+
+	ret = ad5380_i2c_register_driver();
+	if (ret) {
+		ad5380_spi_unregister_driver();
+		return ret;
+	}
+
+	return 0;
+}
+module_init(ad5380_spi_init);
+
+static void __exit ad5380_spi_exit(void)
+{
+	ad5380_i2c_unregister_driver();
+	ad5380_spi_unregister_driver();
+
+}
+module_exit(ad5380_spi_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5380/81/82/83/84/90/91/92 DAC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5421.c b/drivers/staging/iio/dac/ad5421.c
new file mode 100644
index 00000000000..71ee8682476
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5421.c
@@ -0,0 +1,555 @@
+/*
+ * AD5421 Digital to analog converters  driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "../events.h"
+#include "dac.h"
+#include "ad5421.h"
+
+
+#define AD5421_REG_DAC_DATA		0x1
+#define AD5421_REG_CTRL			0x2
+#define AD5421_REG_OFFSET		0x3
+#define AD5421_REG_GAIN			0x4
+/* load dac and fault shared the same register number. Writing to it will cause
+ * a dac load command, reading from it will return the fault status register */
+#define AD5421_REG_LOAD_DAC		0x5
+#define AD5421_REG_FAULT		0x5
+#define AD5421_REG_FORCE_ALARM_CURRENT	0x6
+#define AD5421_REG_RESET		0x7
+#define AD5421_REG_START_CONVERSION	0x8
+#define AD5421_REG_NOOP			0x9
+
+#define AD5421_CTRL_WATCHDOG_DISABLE	BIT(12)
+#define AD5421_CTRL_AUTO_FAULT_READBACK	BIT(11)
+#define AD5421_CTRL_MIN_CURRENT		BIT(9)
+#define AD5421_CTRL_ADC_SOURCE_TEMP	BIT(8)
+#define AD5421_CTRL_ADC_ENABLE		BIT(7)
+#define AD5421_CTRL_PWR_DOWN_INT_VREF	BIT(6)
+
+#define AD5421_FAULT_SPI			BIT(15)
+#define AD5421_FAULT_PEC			BIT(14)
+#define AD5421_FAULT_OVER_CURRENT		BIT(13)
+#define AD5421_FAULT_UNDER_CURRENT		BIT(12)
+#define AD5421_FAULT_TEMP_OVER_140		BIT(11)
+#define AD5421_FAULT_TEMP_OVER_100		BIT(10)
+#define AD5421_FAULT_UNDER_VOLTAGE_6V		BIT(9)
+#define AD5421_FAULT_UNDER_VOLTAGE_12V		BIT(8)
+
+/* These bits will cause the fault pin to go high */
+#define AD5421_FAULT_TRIGGER_IRQ \
+	(AD5421_FAULT_SPI | AD5421_FAULT_PEC | AD5421_FAULT_OVER_CURRENT | \
+	AD5421_FAULT_UNDER_CURRENT | AD5421_FAULT_TEMP_OVER_140)
+
+/**
+ * struct ad5421_state - driver instance specific data
+ * @spi:		spi_device
+ * @ctrl:		control register cache
+ * @current_range:	current range which the device is configured for
+ * @data:		spi transfer buffers
+ * @fault_mask:		software masking of events
+ */
+struct ad5421_state {
+	struct spi_device		*spi;
+	unsigned int			ctrl;
+	enum ad5421_current_range	current_range;
+	unsigned int			fault_mask;
+
+	/*
+	 * DMA (thus cache coherency maintenance) requires the
+	 * transfer buffers to live in their own cache lines.
+	 */
+	union {
+		u32 d32;
+		u8 d8[4];
+	} data[2] ____cacheline_aligned;
+};
+
+static const struct iio_chan_spec ad5421_channels[] = {
+	{
+		.type = IIO_CURRENT,
+		.indexed = 1,
+		.output = 1,
+		.channel = 0,
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT |
+			IIO_CHAN_INFO_OFFSET_SHARED_BIT |
+			IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+			IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
+		.scan_type = IIO_ST('u', 16, 16, 0),
+		.event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) |
+			IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
+	},
+	{
+		.type = IIO_TEMP,
+		.channel = -1,
+		.event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
+	},
+};
+
+static int ad5421_write_unlocked(struct iio_dev *indio_dev,
+	unsigned int reg, unsigned int val)
+{
+	struct ad5421_state *st = iio_priv(indio_dev);
+
+	st->data[0].d32 = cpu_to_be32((reg << 16) | val);
+
+	return spi_write(st->spi, &st->data[0].d8[1], 3);
+}
+
+static int ad5421_write(struct iio_dev *indio_dev, unsigned int reg,
+	unsigned int val)
+{
+	int ret;
+
+	mutex_lock(&indio_dev->mlock);
+	ret = ad5421_write_unlocked(indio_dev, reg, val);
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret;
+}
+
+static int ad5421_read(struct iio_dev *indio_dev, unsigned int reg)
+{
+	struct ad5421_state *st = iio_priv(indio_dev);
+	struct spi_message m;
+	int ret;
+	struct spi_transfer t[] = {
+		{
+			.tx_buf = &st->data[0].d8[1],
+			.len = 3,
+			.cs_change = 1,
+		}, {
+			.rx_buf = &st->data[1].d8[1],
+			.len = 3,
+		},
+	};
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t[0], &m);
+	spi_message_add_tail(&t[1], &m);
+
+	mutex_lock(&indio_dev->mlock);
+
+	st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16));
+
+	ret = spi_sync(st->spi, &m);
+	if (ret >= 0)
+		ret = be32_to_cpu(st->data[1].d32) & 0xffff;
+
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret;
+}
+
+static int ad5421_update_ctrl(struct iio_dev *indio_dev, unsigned int set,
+	unsigned int clr)
+{
+	struct ad5421_state *st = iio_priv(indio_dev);
+	unsigned int ret;
+
+	mutex_lock(&indio_dev->mlock);
+
+	st->ctrl &= ~clr;
+	st->ctrl |= set;
+
+	ret = ad5421_write_unlocked(indio_dev, AD5421_REG_CTRL, st->ctrl);
+
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret;
+}
+
+static irqreturn_t ad5421_fault_handler(int irq, void *data)
+{
+	struct iio_dev *indio_dev = data;
+	struct ad5421_state *st = iio_priv(indio_dev);
+	unsigned int fault;
+	unsigned int old_fault = 0;
+	unsigned int events;
+
+	fault = ad5421_read(indio_dev, AD5421_REG_FAULT);
+	if (!fault)
+		return IRQ_NONE;
+
+	/* If we had a fault, this might mean that the DAC has lost its state
+	 * and has been reset. Make sure that the control register actually
+	 * contains what we expect it to contain. Otherwise the watchdog might
+	 * be enabled and we get watchdog timeout faults, which will render the
+	 * DAC unusable. */
+	ad5421_update_ctrl(indio_dev, 0, 0);
+
+
+	/* The fault pin stays high as long as a fault condition is present and
+	 * it is not possible to mask fault conditions. For certain fault
+	 * conditions for example like over-temperature it takes some time
+	 * until the fault condition disappears. If we would exit the interrupt
+	 * handler immediately after handling the event it would be entered
+	 * again instantly. Thus we fall back to polling in case we detect that
+	 * a interrupt condition is still present.
+	 */
+	do {
+		/* 0xffff is a invalid value for the register and will only be
+		 * read if there has been a communication error */
+		if (fault == 0xffff)
+			fault = 0;
+
+		/* we are only interested in new events */
+		events = (old_fault ^ fault) & fault;
+		events &= st->fault_mask;
+
+		if (events & AD5421_FAULT_OVER_CURRENT) {
+			iio_push_event(indio_dev,
+				IIO_UNMOD_EVENT_CODE(IIO_CURRENT,
+					0,
+					IIO_EV_TYPE_THRESH,
+					IIO_EV_DIR_RISING),
+			iio_get_time_ns());
+		}
+
+		if (events & AD5421_FAULT_UNDER_CURRENT) {
+			iio_push_event(indio_dev,
+				IIO_UNMOD_EVENT_CODE(IIO_CURRENT,
+					0,
+					IIO_EV_TYPE_THRESH,
+					IIO_EV_DIR_FALLING),
+				iio_get_time_ns());
+		}
+
+		if (events & AD5421_FAULT_TEMP_OVER_140) {
+			iio_push_event(indio_dev,
+				IIO_UNMOD_EVENT_CODE(IIO_TEMP,
+					0,
+					IIO_EV_TYPE_MAG,
+					IIO_EV_DIR_RISING),
+				iio_get_time_ns());
+		}
+
+		old_fault = fault;
+		fault = ad5421_read(indio_dev, AD5421_REG_FAULT);
+
+		/* still active? go to sleep for some time */
+		if (fault & AD5421_FAULT_TRIGGER_IRQ)
+			msleep(1000);
+
+	} while (fault & AD5421_FAULT_TRIGGER_IRQ);
+
+
+	return IRQ_HANDLED;
+}
+
+static void ad5421_get_current_min_max(struct ad5421_state *st,
+	unsigned int *min, unsigned int *max)
+{
+	/* The current range is configured using external pins, which are
+	 * usually hard-wired and not run-time switchable. */
+	switch (st->current_range) {
+	case AD5421_CURRENT_RANGE_4mA_20mA:
+		*min = 4000;
+		*max = 20000;
+		break;
+	case AD5421_CURRENT_RANGE_3mA8_21mA:
+		*min = 3800;
+		*max = 21000;
+		break;
+	case AD5421_CURRENT_RANGE_3mA2_24mA:
+		*min = 3200;
+		*max = 24000;
+		break;
+	default:
+		*min = 0;
+		*max = 1;
+		break;
+	}
+}
+
+static inline unsigned int ad5421_get_offset(struct ad5421_state *st)
+{
+	unsigned int min, max;
+
+	ad5421_get_current_min_max(st, &min, &max);
+	return (min * (1 << 16)) / (max - min);
+}
+
+static inline unsigned int ad5421_get_scale(struct ad5421_state *st)
+{
+	unsigned int min, max;
+
+	ad5421_get_current_min_max(st, &min, &max);
+	return ((max - min) * 1000) / (1 << 16);
+}
+
+static int ad5421_read_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int *val, int *val2, long m)
+{
+	struct ad5421_state *st = iio_priv(indio_dev);
+	int ret;
+
+	if (chan->type != IIO_CURRENT)
+		return -EINVAL;
+
+	switch (m) {
+	case 0:
+		ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA);
+		if (ret < 0)
+			return ret;
+		*val = ret;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		*val = 0;
+		*val2 = ad5421_get_scale(st);
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = ad5421_get_offset(st);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		ret = ad5421_read(indio_dev, AD5421_REG_OFFSET);
+		if (ret < 0)
+			return ret;
+		*val = ret - 32768;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBSCALE:
+		ret = ad5421_read(indio_dev, AD5421_REG_GAIN);
+		if (ret < 0)
+			return ret;
+		*val = ret;
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static int ad5421_write_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+	const unsigned int max_val = 1 << 16;
+
+	switch (mask) {
+	case 0:
+		if (val >= max_val || val < 0)
+			return -EINVAL;
+
+		return ad5421_write(indio_dev, AD5421_REG_DAC_DATA, val);
+	case IIO_CHAN_INFO_CALIBBIAS:
+		val += 32768;
+		if (val >= max_val || val < 0)
+			return -EINVAL;
+
+		return ad5421_write(indio_dev, AD5421_REG_OFFSET, val);
+	case IIO_CHAN_INFO_CALIBSCALE:
+		if (val >= max_val || val < 0)
+			return -EINVAL;
+
+		return ad5421_write(indio_dev, AD5421_REG_GAIN, val);
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static int ad5421_write_event_config(struct iio_dev *indio_dev,
+	u64 event_code, int state)
+{
+	struct ad5421_state *st = iio_priv(indio_dev);
+	unsigned int mask;
+
+	switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
+	case IIO_CURRENT:
+		if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) ==
+			IIO_EV_DIR_RISING)
+			mask = AD5421_FAULT_OVER_CURRENT;
+		else
+			mask = AD5421_FAULT_UNDER_CURRENT;
+		break;
+	case IIO_TEMP:
+		mask = AD5421_FAULT_TEMP_OVER_140;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	mutex_lock(&indio_dev->mlock);
+	if (state)
+		st->fault_mask |= mask;
+	else
+		st->fault_mask &= ~mask;
+	mutex_unlock(&indio_dev->mlock);
+
+	return 0;
+}
+
+static int ad5421_read_event_config(struct iio_dev *indio_dev,
+	u64 event_code)
+{
+	struct ad5421_state *st = iio_priv(indio_dev);
+	unsigned int mask;
+
+	switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
+	case IIO_CURRENT:
+		if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) ==
+			IIO_EV_DIR_RISING)
+			mask = AD5421_FAULT_OVER_CURRENT;
+		else
+			mask = AD5421_FAULT_UNDER_CURRENT;
+		break;
+	case IIO_TEMP:
+		mask = AD5421_FAULT_TEMP_OVER_140;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return (bool)(st->fault_mask & mask);
+}
+
+static int ad5421_read_event_value(struct iio_dev *indio_dev, u64 event_code,
+	int *val)
+{
+	int ret;
+
+	switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
+	case IIO_CURRENT:
+		ret = ad5421_read(indio_dev, AD5421_REG_DAC_DATA);
+		if (ret < 0)
+			return ret;
+		*val = ret;
+		break;
+	case IIO_TEMP:
+		*val = 140000;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct iio_info ad5421_info = {
+	.read_raw =		ad5421_read_raw,
+	.write_raw =		ad5421_write_raw,
+	.read_event_config =	ad5421_read_event_config,
+	.write_event_config =	ad5421_write_event_config,
+	.read_event_value =	ad5421_read_event_value,
+	.driver_module =	THIS_MODULE,
+};
+
+static int __devinit ad5421_probe(struct spi_device *spi)
+{
+	struct ad5421_platform_data *pdata = dev_get_platdata(&spi->dev);
+	struct iio_dev *indio_dev;
+	struct ad5421_state *st;
+	int ret;
+
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		dev_err(&spi->dev, "Failed to allocate iio device\n");
+		return  -ENOMEM;
+	}
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
+
+	st->spi = spi;
+
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = "ad5421";
+	indio_dev->info = &ad5421_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = ad5421_channels;
+	indio_dev->num_channels = ARRAY_SIZE(ad5421_channels);
+
+	st->ctrl = AD5421_CTRL_WATCHDOG_DISABLE |
+			AD5421_CTRL_AUTO_FAULT_READBACK;
+
+	if (pdata) {
+		st->current_range = pdata->current_range;
+		if (pdata->external_vref)
+			st->ctrl |= AD5421_CTRL_PWR_DOWN_INT_VREF;
+	} else {
+		st->current_range = AD5421_CURRENT_RANGE_4mA_20mA;
+	}
+
+	/* write initial ctrl register value */
+	ad5421_update_ctrl(indio_dev, 0, 0);
+
+	if (spi->irq) {
+		ret = request_threaded_irq(spi->irq,
+					   NULL,
+					   ad5421_fault_handler,
+					   IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+					   "ad5421 fault",
+					   indio_dev);
+		if (ret)
+			goto error_free;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&spi->dev, "Failed to register iio device: %d\n", ret);
+		goto error_free_irq;
+	}
+
+	return 0;
+
+error_free_irq:
+	if (spi->irq)
+		free_irq(spi->irq, indio_dev);
+error_free:
+	iio_free_device(indio_dev);
+
+	return ret;
+}
+
+static int __devexit ad5421_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+
+	iio_device_unregister(indio_dev);
+	if (spi->irq)
+		free_irq(spi->irq, indio_dev);
+	iio_free_device(indio_dev);
+
+	return 0;
+}
+
+static struct spi_driver ad5421_driver = {
+	.driver = {
+		   .name = "ad5421",
+		   .owner = THIS_MODULE,
+	},
+	.probe = ad5421_probe,
+	.remove = __devexit_p(ad5421_remove),
+};
+
+static __init int ad5421_init(void)
+{
+	return spi_register_driver(&ad5421_driver);
+}
+module_init(ad5421_init);
+
+static __exit void ad5421_exit(void)
+{
+	spi_unregister_driver(&ad5421_driver);
+}
+module_exit(ad5421_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5421 DAC");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:ad5421");
diff --git a/drivers/staging/iio/dac/ad5421.h b/drivers/staging/iio/dac/ad5421.h
new file mode 100644
index 00000000000..cd2bb84ff1b
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5421.h
@@ -0,0 +1,32 @@
+#ifndef __IIO_DAC_AD5421_H__
+#define __IIO_DAC_AD5421_H__
+
+/*
+ * TODO: This file needs to go into include/linux/iio
+ */
+
+/**
+ * enum ad5421_current_range - Current range the AD5421 is configured for.
+ * @AD5421_CURRENT_RANGE_4mA_20mA: 4 mA to 20 mA (RANGE1,0 pins = 00)
+ * @AD5421_CURRENT_RANGE_3mA8_21mA: 3.8 mA to 21 mA (RANGE1,0 pins = x1)
+ * @AD5421_CURRENT_RANGE_3mA2_24mA: 3.2 mA to 24 mA (RANGE1,0 pins = 10)
+ */
+
+enum ad5421_current_range {
+	AD5421_CURRENT_RANGE_4mA_20mA,
+	AD5421_CURRENT_RANGE_3mA8_21mA,
+	AD5421_CURRENT_RANGE_3mA2_24mA,
+};
+
+/**
+ * struct ad5421_platform_data - AD5421 DAC driver platform data
+ * @external_vref: whether an external reference voltage is used or not
+ * @current_range: Current range the AD5421 is configured for
+ */
+
+struct ad5421_platform_data {
+	bool external_vref;
+	enum ad5421_current_range current_range;
+};
+
+#endif
diff --git a/drivers/staging/iio/dac/ad5446.c b/drivers/staging/iio/dac/ad5446.c
index ec701e939b6..693e7482524 100644
--- a/drivers/staging/iio/dac/ad5446.c
+++ b/drivers/staging/iio/dac/ad5446.c
@@ -26,19 +26,17 @@
 
 static void ad5446_store_sample(struct ad5446_state *st, unsigned val)
 {
-	st->data.d16 = cpu_to_be16(AD5446_LOAD |
-					(val << st->chip_info->left_shift));
+	st->data.d16 = cpu_to_be16(AD5446_LOAD | val);
 }
 
 static void ad5542_store_sample(struct ad5446_state *st, unsigned val)
 {
-	st->data.d16 = cpu_to_be16(val << st->chip_info->left_shift);
+	st->data.d16 = cpu_to_be16(val);
 }
 
 static void ad5620_store_sample(struct ad5446_state *st, unsigned val)
 {
-	st->data.d16 = cpu_to_be16(AD5620_LOAD |
-					(val << st->chip_info->left_shift));
+	st->data.d16 = cpu_to_be16(AD5620_LOAD | val);
 }
 
 static void ad5660_store_sample(struct ad5446_state *st, unsigned val)
@@ -63,50 +61,6 @@ static void ad5660_store_pwr_down(struct ad5446_state *st, unsigned mode)
 	st->data.d24[2] = val & 0xFF;
 }
 
-static ssize_t ad5446_write(struct device *dev,
-		struct device_attribute *attr,
-		const char *buf,
-		size_t len)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5446_state *st = iio_priv(indio_dev);
-	int ret;
-	long val;
-
-	ret = strict_strtol(buf, 10, &val);
-	if (ret)
-		goto error_ret;
-
-	if (val > RES_MASK(st->chip_info->bits)) {
-		ret = -EINVAL;
-		goto error_ret;
-	}
-
-	mutex_lock(&indio_dev->mlock);
-	st->cached_val = val;
-	st->chip_info->store_sample(st, val);
-	ret = spi_sync(st->spi, &st->msg);
-	mutex_unlock(&indio_dev->mlock);
-
-error_ret:
-	return ret ? ret : len;
-}
-
-static IIO_DEV_ATTR_OUT_RAW(0, ad5446_write, 0);
-
-static ssize_t ad5446_show_scale(struct device *dev,
-				struct device_attribute *attr,
-				char *buf)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5446_state *st = iio_priv(indio_dev);
-	/* Corresponds to Vref / 2^(bits) */
-	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
-
-	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
-}
-static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5446_show_scale, NULL, 0);
-
 static ssize_t ad5446_write_powerdown_mode(struct device *dev,
 				       struct device_attribute *attr,
 				       const char *buf, size_t len)
@@ -189,8 +143,6 @@ static IIO_DEVICE_ATTR(out_voltage0_powerdown, S_IRUGO | S_IWUSR,
 			ad5446_write_dac_powerdown, 0);
 
 static struct attribute *ad5446_attributes[] = {
-	&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
-	&iio_dev_attr_out_voltage_scale.dev_attr.attr,
 	&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
 	&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
@@ -223,121 +175,148 @@ static const struct attribute_group ad5446_attribute_group = {
 	.is_visible = ad5446_attr_is_visible,
 };
 
+#define AD5446_CHANNEL(bits, storage, shift) { \
+	.type = IIO_VOLTAGE, \
+	.indexed = 1, \
+	.output = 1, \
+	.channel = 0, \
+	.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
+	.scan_type = IIO_ST('u', (bits), (storage), (shift)) \
+}
+
 static const struct ad5446_chip_info ad5446_chip_info_tbl[] = {
 	[ID_AD5444] = {
-		.bits = 12,
-		.storagebits = 16,
-		.left_shift = 2,
+		.channel = AD5446_CHANNEL(12, 16, 2),
 		.store_sample = ad5446_store_sample,
 	},
 	[ID_AD5446] = {
-		.bits = 14,
-		.storagebits = 16,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(14, 16, 0),
 		.store_sample = ad5446_store_sample,
 	},
 	[ID_AD5541A] = {
-		.bits = 16,
-		.storagebits = 16,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(16, 16, 0),
 		.store_sample = ad5542_store_sample,
 	},
 	[ID_AD5542A] = {
-		.bits = 16,
-		.storagebits = 16,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(16, 16, 0),
 		.store_sample = ad5542_store_sample,
 	},
 	[ID_AD5543] = {
-		.bits = 16,
-		.storagebits = 16,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(16, 16, 0),
 		.store_sample = ad5542_store_sample,
 	},
 	[ID_AD5512A] = {
-		.bits = 12,
-		.storagebits = 16,
-		.left_shift = 4,
+		.channel = AD5446_CHANNEL(12, 16, 4),
 		.store_sample = ad5542_store_sample,
 	},
 	[ID_AD5553] = {
-		.bits = 14,
-		.storagebits = 16,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(14, 16, 0),
 		.store_sample = ad5542_store_sample,
 	},
 	[ID_AD5601] = {
-		.bits = 8,
-		.storagebits = 16,
-		.left_shift = 6,
+		.channel = AD5446_CHANNEL(8, 16, 6),
 		.store_sample = ad5542_store_sample,
 		.store_pwr_down = ad5620_store_pwr_down,
 	},
 	[ID_AD5611] = {
-		.bits = 10,
-		.storagebits = 16,
-		.left_shift = 4,
+		.channel = AD5446_CHANNEL(10, 16, 4),
 		.store_sample = ad5542_store_sample,
 		.store_pwr_down = ad5620_store_pwr_down,
 	},
 	[ID_AD5621] = {
-		.bits = 12,
-		.storagebits = 16,
-		.left_shift = 2,
+		.channel = AD5446_CHANNEL(12, 16, 2),
 		.store_sample = ad5542_store_sample,
 		.store_pwr_down = ad5620_store_pwr_down,
 	},
 	[ID_AD5620_2500] = {
-		.bits = 12,
-		.storagebits = 16,
-		.left_shift = 2,
+		.channel = AD5446_CHANNEL(12, 16, 2),
 		.int_vref_mv = 2500,
 		.store_sample = ad5620_store_sample,
 		.store_pwr_down = ad5620_store_pwr_down,
 	},
 	[ID_AD5620_1250] = {
-		.bits = 12,
-		.storagebits = 16,
-		.left_shift = 2,
+		.channel = AD5446_CHANNEL(12, 16, 2),
 		.int_vref_mv = 1250,
 		.store_sample = ad5620_store_sample,
 		.store_pwr_down = ad5620_store_pwr_down,
 	},
 	[ID_AD5640_2500] = {
-		.bits = 14,
-		.storagebits = 16,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(14, 16, 0),
 		.int_vref_mv = 2500,
 		.store_sample = ad5620_store_sample,
 		.store_pwr_down = ad5620_store_pwr_down,
 	},
 	[ID_AD5640_1250] = {
-		.bits = 14,
-		.storagebits = 16,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(14, 16, 0),
 		.int_vref_mv = 1250,
 		.store_sample = ad5620_store_sample,
 		.store_pwr_down = ad5620_store_pwr_down,
 	},
 	[ID_AD5660_2500] = {
-		.bits = 16,
-		.storagebits = 24,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(16, 16, 0),
 		.int_vref_mv = 2500,
 		.store_sample = ad5660_store_sample,
 		.store_pwr_down = ad5660_store_pwr_down,
 	},
 	[ID_AD5660_1250] = {
-		.bits = 16,
-		.storagebits = 24,
-		.left_shift = 0,
+		.channel = AD5446_CHANNEL(16, 16, 0),
 		.int_vref_mv = 1250,
 		.store_sample = ad5660_store_sample,
 		.store_pwr_down = ad5660_store_pwr_down,
 	},
 };
 
+static int ad5446_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val,
+			   int *val2,
+			   long m)
+{
+	struct ad5446_state *st = iio_priv(indio_dev);
+	unsigned long scale_uv;
+
+	switch (m) {
+	case IIO_CHAN_INFO_SCALE:
+		scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
+		*val =  scale_uv / 1000;
+		*val2 = (scale_uv % 1000) * 1000;
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	}
+	return -EINVAL;
+}
+
+static int ad5446_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct ad5446_state *st = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case 0:
+		if (val >= (1 << chan->scan_type.realbits) || val < 0)
+			return -EINVAL;
+
+		val <<= chan->scan_type.shift;
+		mutex_lock(&indio_dev->mlock);
+		st->cached_val = val;
+		st->chip_info->store_sample(st, val);
+		ret = spi_sync(st->spi, &st->msg);
+		mutex_unlock(&indio_dev->mlock);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
 static const struct iio_info ad5446_info = {
+	.read_raw = ad5446_read_raw,
+	.write_raw = ad5446_write_raw,
 	.attrs = &ad5446_attribute_group,
 	.driver_module = THIS_MODULE,
 };
@@ -376,11 +355,13 @@ static int __devinit ad5446_probe(struct spi_device *spi)
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->info = &ad5446_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = &st->chip_info->channel;
+	indio_dev->num_channels = 1;
 
 	/* Setup default message */
 
 	st->xfer.tx_buf = &st->data;
-	st->xfer.len = st->chip_info->storagebits / 8;
+	st->xfer.len = st->chip_info->channel.scan_type.storagebits / 8;
 
 	spi_message_init(&st->msg);
 	spi_message_add_tail(&st->xfer, &st->msg);
@@ -454,11 +435,11 @@ static const struct spi_device_id ad5446_id[] = {
 	{"ad5660-1250", ID_AD5660_1250},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad5446_id);
 
 static struct spi_driver ad5446_driver = {
 	.driver = {
 		.name	= "ad5446",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad5446_probe,
@@ -470,4 +451,3 @@ module_spi_driver(ad5446_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD5444/AD5446 DAC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad5446");
diff --git a/drivers/staging/iio/dac/ad5446.h b/drivers/staging/iio/dac/ad5446.h
index 7118d653ac3..4ea3476fb06 100644
--- a/drivers/staging/iio/dac/ad5446.h
+++ b/drivers/staging/iio/dac/ad5446.h
@@ -25,8 +25,6 @@
 #define AD5660_PWRDWN_100k	(0x2 << 16) /* Power-down: 100kOhm to GND */
 #define AD5660_PWRDWN_TRISTATE	(0x3 << 16) /* Power-down: Three-state */
 
-#define RES_MASK(bits)	((1 << (bits)) - 1)
-
 #define MODE_PWRDWN_1k		0x1
 #define MODE_PWRDWN_100k	0x2
 #define MODE_PWRDWN_TRISTATE	0x3
@@ -62,18 +60,14 @@ struct ad5446_state {
 
 /**
  * struct ad5446_chip_info - chip specific information
- * @bits:		accuracy of the DAC in bits
- * @storagebits:	number of bits written to the DAC
- * @left_shift:		number of bits the datum must be shifted
+ * @channel:		channel spec for the DAC
  * @int_vref_mv:	AD5620/40/60: the internal reference voltage
  * @store_sample:	chip specific helper function to store the datum
  * @store_sample:	chip specific helper function to store the powerpown cmd
  */
 
 struct ad5446_chip_info {
-	u8			bits;
-	u8			storagebits;
-	u8			left_shift;
+	struct iio_chan_spec	channel;
 	u16			int_vref_mv;
 	void (*store_sample)	(struct ad5446_state *st, unsigned val);
 	void (*store_pwr_down)	(struct ad5446_state *st, unsigned mode);
diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c
index 57539ce8e6c..bc17205fe72 100644
--- a/drivers/staging/iio/dac/ad5504.c
+++ b/drivers/staging/iio/dac/ad5504.c
@@ -18,9 +18,27 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../events.h"
 #include "dac.h"
 #include "ad5504.h"
 
+#define AD5504_CHANNEL(_chan) { \
+	.type = IIO_VOLTAGE, \
+	.indexed = 1, \
+	.output = 1, \
+	.channel = (_chan), \
+	.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
+	.address = AD5504_ADDR_DAC(_chan), \
+	.scan_type = IIO_ST('u', 12, 16, 0), \
+}
+
+static const struct iio_chan_spec ad5504_channels[] = {
+	AD5504_CHANNEL(0),
+	AD5504_CHANNEL(1),
+	AD5504_CHANNEL(2),
+	AD5504_CHANNEL(3),
+};
+
 static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
 {
 	u16 tmp = cpu_to_be16(AD5504_CMD_WRITE |
@@ -30,13 +48,14 @@ static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val)
 	return spi_write(spi, (u8 *)&tmp, 2);
 }
 
-static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
+static int ad5504_spi_read(struct spi_device *spi, u8 addr)
 {
 	u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr));
+	u16 val;
 	int ret;
 	struct spi_transfer	t = {
 			.tx_buf		= &tmp,
-			.rx_buf		= val,
+			.rx_buf		= &val,
 			.len		= 2,
 		};
 	struct spi_message	m;
@@ -45,44 +64,61 @@ static int ad5504_spi_read(struct spi_device *spi, u8 addr, u16 *val)
 	spi_message_add_tail(&t, &m);
 	ret = spi_sync(spi, &m);
 
-	*val = be16_to_cpu(*val) & AD5504_RES_MASK;
+	if (ret < 0)
+		return ret;
 
-	return ret;
+	return be16_to_cpu(val) & AD5504_RES_MASK;
 }
 
-static ssize_t ad5504_write_dac(struct device *dev,
-				 struct device_attribute *attr,
-				 const char *buf, size_t len)
+static int ad5504_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val,
+			   int *val2,
+			   long m)
 {
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct ad5504_state *st = iio_priv(indio_dev);
-	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
-	long readin;
+	unsigned long scale_uv;
 	int ret;
 
-	ret = strict_strtol(buf, 10, &readin);
-	if (ret)
-		return ret;
+	switch (m) {
+	case 0:
+		ret = ad5504_spi_read(st->spi, chan->address);
+		if (ret < 0)
+			return ret;
 
-	ret = ad5504_spi_write(st->spi, this_attr->address, readin);
-	return ret ? ret : len;
+		*val = ret;
+
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
+		*val =  scale_uv / 1000;
+		*val2 = (scale_uv % 1000) * 1000;
+		return IIO_VAL_INT_PLUS_MICRO;
+
+	}
+	return -EINVAL;
 }
 
-static ssize_t ad5504_read_dac(struct device *dev,
-					   struct device_attribute *attr,
-					   char *buf)
+static int ad5504_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
 {
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct ad5504_state *st = iio_priv(indio_dev);
-	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	int ret;
-	u16 val;
 
-	ret = ad5504_spi_read(st->spi, this_attr->address, &val);
-	if (ret)
-		return ret;
+	switch (mask) {
+	case 0:
+		if (val >= (1 << chan->scan_type.realbits) || val < 0)
+			return -EINVAL;
 
-	return sprintf(buf, "%d\n", val);
+		return ad5504_spi_write(st->spi, chan->address, val);
+	default:
+		ret = -EINVAL;
+	}
+
+	return -EINVAL;
 }
 
 static ssize_t ad5504_read_powerdown_mode(struct device *dev,
@@ -157,32 +193,6 @@ static ssize_t ad5504_write_dac_powerdown(struct device *dev,
 	return ret ? ret : len;
 }
 
-static ssize_t ad5504_show_scale(struct device *dev,
-				struct device_attribute *attr,
-				char *buf)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5504_state *st = iio_priv(indio_dev);
-	/* Corresponds to Vref / 2^(bits) */
-	unsigned int scale_uv = (st->vref_mv * 1000) >> AD5505_BITS;
-
-	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
-}
-static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5504_show_scale, NULL, 0);
-
-#define IIO_DEV_ATTR_OUT_RW_RAW(_num, _show, _store, _addr)		\
-	IIO_DEVICE_ATTR(out_voltage##_num##_raw,			\
-			S_IRUGO | S_IWUSR, _show, _store, _addr)
-
-static IIO_DEV_ATTR_OUT_RW_RAW(0, ad5504_read_dac,
-	ad5504_write_dac, AD5504_ADDR_DAC0);
-static IIO_DEV_ATTR_OUT_RW_RAW(1, ad5504_read_dac,
-	ad5504_write_dac, AD5504_ADDR_DAC1);
-static IIO_DEV_ATTR_OUT_RW_RAW(2, ad5504_read_dac,
-	ad5504_write_dac, AD5504_ADDR_DAC2);
-static IIO_DEV_ATTR_OUT_RW_RAW(3, ad5504_read_dac,
-	ad5504_write_dac, AD5504_ADDR_DAC3);
-
 static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO |
 			S_IWUSR, ad5504_read_powerdown_mode,
 			ad5504_write_powerdown_mode, 0);
@@ -203,17 +213,12 @@ static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5504_read_dac_powerdown,
 				   ad5504_write_dac_powerdown, 3);
 
 static struct attribute *ad5504_attributes[] = {
-	&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
-	&iio_dev_attr_out_voltage1_raw.dev_attr.attr,
-	&iio_dev_attr_out_voltage2_raw.dev_attr.attr,
-	&iio_dev_attr_out_voltage3_raw.dev_attr.attr,
 	&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage1_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage2_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage3_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
 	&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
-	&iio_dev_attr_out_voltage_scale.dev_attr.attr,
 	NULL,
 };
 
@@ -222,11 +227,9 @@ static const struct attribute_group ad5504_attribute_group = {
 };
 
 static struct attribute *ad5501_attributes[] = {
-	&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
 	&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
 	&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
-	&iio_dev_attr_out_voltage_scale.dev_attr.attr,
 	NULL,
 };
 
@@ -261,12 +264,16 @@ static irqreturn_t ad5504_event_handler(int irq, void *private)
 }
 
 static const struct iio_info ad5504_info = {
+	.write_raw = ad5504_write_raw,
+	.read_raw = ad5504_read_raw,
 	.attrs = &ad5504_attribute_group,
 	.event_attrs = &ad5504_ev_attribute_group,
 	.driver_module = THIS_MODULE,
 };
 
 static const struct iio_info ad5501_info = {
+	.write_raw = ad5504_write_raw,
+	.read_raw = ad5504_read_raw,
 	.attrs = &ad5501_attribute_group,
 	.event_attrs = &ad5504_ev_attribute_group,
 	.driver_module = THIS_MODULE,
@@ -307,10 +314,14 @@ static int __devinit ad5504_probe(struct spi_device *spi)
 	st->spi = spi;
 	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(st->spi)->name;
-	if (spi_get_device_id(st->spi)->driver_data == ID_AD5501)
+	if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) {
 		indio_dev->info = &ad5501_info;
-	else
+		indio_dev->num_channels = 1;
+	} else {
 		indio_dev->info = &ad5504_info;
+		indio_dev->num_channels = 4;
+	}
+	indio_dev->channels = ad5504_channels;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	if (spi->irq) {
@@ -367,6 +378,7 @@ static const struct spi_device_id ad5504_id[] = {
 	{"ad5501", ID_AD5501},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad5504_id);
 
 static struct spi_driver ad5504_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/dac/ad5504.h b/drivers/staging/iio/dac/ad5504.h
index 85beb1dd29b..afe09522f53 100644
--- a/drivers/staging/iio/dac/ad5504.h
+++ b/drivers/staging/iio/dac/ad5504.h
@@ -18,10 +18,7 @@
 
 /* Registers */
 #define AD5504_ADDR_NOOP		0
-#define AD5504_ADDR_DAC0		1
-#define AD5504_ADDR_DAC1		2
-#define AD5504_ADDR_DAC2		3
-#define AD5504_ADDR_DAC3		4
+#define AD5504_ADDR_DAC(x)		((x) + 1)
 #define AD5504_ADDR_ALL_DAC		5
 #define AD5504_ADDR_CTRL		7
 
diff --git a/drivers/staging/iio/dac/ad5624r.h b/drivers/staging/iio/dac/ad5624r.h
index b71c6a03e78..5dca3028cdf 100644
--- a/drivers/staging/iio/dac/ad5624r.h
+++ b/drivers/staging/iio/dac/ad5624r.h
@@ -32,12 +32,12 @@
 
 /**
  * struct ad5624r_chip_info - chip specific information
- * @bits:		accuracy of the DAC in bits
+ * @channels:		channel spec for the DAC
  * @int_vref_mv:	AD5620/40/60: the internal reference voltage
  */
 
 struct ad5624r_chip_info {
-	u8				bits;
+	const struct iio_chan_spec	*channels;
 	u16				int_vref_mv;
 };
 
diff --git a/drivers/staging/iio/dac/ad5624r_spi.c b/drivers/staging/iio/dac/ad5624r_spi.c
index 6e05f0dbae0..10c7484366e 100644
--- a/drivers/staging/iio/dac/ad5624r_spi.c
+++ b/drivers/staging/iio/dac/ad5624r_spi.c
@@ -21,29 +21,51 @@
 #include "dac.h"
 #include "ad5624r.h"
 
+#define AD5624R_CHANNEL(_chan, _bits) { \
+	.type = IIO_VOLTAGE, \
+	.indexed = 1, \
+	.output = 1, \
+	.channel = (_chan), \
+	.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT, \
+	.address = (_chan), \
+	.scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits)), \
+}
+
+#define DECLARE_AD5624R_CHANNELS(_name, _bits) \
+	const struct iio_chan_spec _name##_channels[] = { \
+		AD5624R_CHANNEL(0, _bits), \
+		AD5624R_CHANNEL(1, _bits), \
+		AD5624R_CHANNEL(2, _bits), \
+		AD5624R_CHANNEL(3, _bits), \
+}
+
+static DECLARE_AD5624R_CHANNELS(ad5624r, 12);
+static DECLARE_AD5624R_CHANNELS(ad5644r, 14);
+static DECLARE_AD5624R_CHANNELS(ad5664r, 16);
+
 static const struct ad5624r_chip_info ad5624r_chip_info_tbl[] = {
 	[ID_AD5624R3] = {
-		.bits = 12,
-		.int_vref_mv = 1250,
-	},
-	[ID_AD5644R3] = {
-		.bits = 14,
-		.int_vref_mv = 1250,
-	},
-	[ID_AD5664R3] = {
-		.bits = 16,
+		.channels = ad5624r_channels,
 		.int_vref_mv = 1250,
 	},
 	[ID_AD5624R5] = {
-		.bits = 12,
+		.channels = ad5624r_channels,
 		.int_vref_mv = 2500,
 	},
+	[ID_AD5644R3] = {
+		.channels = ad5644r_channels,
+		.int_vref_mv = 1250,
+	},
 	[ID_AD5644R5] = {
-		.bits = 14,
+		.channels = ad5644r_channels,
 		.int_vref_mv = 2500,
 	},
+	[ID_AD5664R3] = {
+		.channels = ad5664r_channels,
+		.int_vref_mv = 1250,
+	},
 	[ID_AD5664R5] = {
-		.bits = 16,
+		.channels = ad5664r_channels,
 		.int_vref_mv = 2500,
 	},
 };
@@ -70,24 +92,49 @@ static int ad5624r_spi_write(struct spi_device *spi,
 	return spi_write(spi, msg, 3);
 }
 
-static ssize_t ad5624r_write_dac(struct device *dev,
-				 struct device_attribute *attr,
-				 const char *buf, size_t len)
+static int ad5624r_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val,
+			   int *val2,
+			   long m)
 {
-	long readin;
-	int ret;
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct ad5624r_state *st = iio_priv(indio_dev);
-	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+	unsigned long scale_uv;
 
-	ret = strict_strtol(buf, 10, &readin);
-	if (ret)
-		return ret;
+	switch (m) {
+	case IIO_CHAN_INFO_SCALE:
+		scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits;
+		*val =  scale_uv / 1000;
+		*val2 = (scale_uv % 1000) * 1000;
+		return IIO_VAL_INT_PLUS_MICRO;
 
-	ret = ad5624r_spi_write(st->us, AD5624R_CMD_WRITE_INPUT_N_UPDATE_N,
-				this_attr->address, readin,
-				st->chip_info->bits);
-	return ret ? ret : len;
+	}
+	return -EINVAL;
+}
+
+static int ad5624r_write_raw(struct iio_dev *indio_dev,
+			       struct iio_chan_spec const *chan,
+			       int val,
+			       int val2,
+			       long mask)
+{
+	struct ad5624r_state *st = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case 0:
+		if (val >= (1 << chan->scan_type.realbits) || val < 0)
+			return -EINVAL;
+
+		return ad5624r_spi_write(st->us,
+				AD5624R_CMD_WRITE_INPUT_N_UPDATE_N,
+				chan->address, val,
+				chan->scan_type.shift);
+	default:
+		ret = -EINVAL;
+	}
+
+	return -EINVAL;
 }
 
 static ssize_t ad5624r_read_powerdown_mode(struct device *dev,
@@ -161,24 +208,6 @@ static ssize_t ad5624r_write_dac_powerdown(struct device *dev,
 	return ret ? ret : len;
 }
 
-static ssize_t ad5624r_show_scale(struct device *dev,
-				struct device_attribute *attr,
-				char *buf)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct ad5624r_state *st = iio_priv(indio_dev);
-	/* Corresponds to Vref / 2^(bits) */
-	unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
-
-	return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
-}
-static IIO_DEVICE_ATTR(out_voltage_scale, S_IRUGO, ad5624r_show_scale, NULL, 0);
-
-static IIO_DEV_ATTR_OUT_RAW(0, ad5624r_write_dac, AD5624R_ADDR_DAC0);
-static IIO_DEV_ATTR_OUT_RAW(1, ad5624r_write_dac, AD5624R_ADDR_DAC1);
-static IIO_DEV_ATTR_OUT_RAW(2, ad5624r_write_dac, AD5624R_ADDR_DAC2);
-static IIO_DEV_ATTR_OUT_RAW(3, ad5624r_write_dac, AD5624R_ADDR_DAC3);
-
 static IIO_DEVICE_ATTR(out_voltage_powerdown_mode, S_IRUGO |
 			S_IWUSR, ad5624r_read_powerdown_mode,
 			ad5624r_write_powerdown_mode, 0);
@@ -200,17 +229,12 @@ static IIO_DEV_ATTR_DAC_POWERDOWN(3, ad5624r_read_dac_powerdown,
 				   ad5624r_write_dac_powerdown, 3);
 
 static struct attribute *ad5624r_attributes[] = {
-	&iio_dev_attr_out_voltage0_raw.dev_attr.attr,
-	&iio_dev_attr_out_voltage1_raw.dev_attr.attr,
-	&iio_dev_attr_out_voltage2_raw.dev_attr.attr,
-	&iio_dev_attr_out_voltage3_raw.dev_attr.attr,
 	&iio_dev_attr_out_voltage0_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage1_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage2_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage3_powerdown.dev_attr.attr,
 	&iio_dev_attr_out_voltage_powerdown_mode.dev_attr.attr,
 	&iio_const_attr_out_voltage_powerdown_mode_available.dev_attr.attr,
-	&iio_dev_attr_out_voltage_scale.dev_attr.attr,
 	NULL,
 };
 
@@ -219,6 +243,8 @@ static const struct attribute_group ad5624r_attribute_group = {
 };
 
 static const struct iio_info ad5624r_info = {
+	.write_raw = ad5624r_write_raw,
+	.read_raw = ad5624r_read_raw,
 	.attrs = &ad5624r_attribute_group,
 	.driver_module = THIS_MODULE,
 };
@@ -259,6 +285,8 @@ static int __devinit ad5624r_probe(struct spi_device *spi)
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->info = &ad5624r_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = st->chip_info->channels;
+	indio_dev->num_channels = AD5624R_DAC_CHANNELS;
 
 	ret = ad5624r_spi_write(spi, AD5624R_CMD_INTERNAL_REFER_SETUP, 0,
 				!!voltage_uv, 16);
@@ -307,6 +335,7 @@ static const struct spi_device_id ad5624r_id[] = {
 	{"ad5664r5", ID_AD5664R5},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad5624r_id);
 
 static struct spi_driver ad5624r_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/dac/ad5686.c b/drivers/staging/iio/dac/ad5686.c
index e72db2fbfed..ce2d6193dd8 100644
--- a/drivers/staging/iio/dac/ad5686.c
+++ b/drivers/staging/iio/dac/ad5686.c
@@ -99,7 +99,7 @@ enum ad5686_supported_device_ids {
 		.indexed = 1,					\
 		.output = 1,					\
 		.channel = chan,				\
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),	\
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,	\
 		.address = AD5686_ADDR_DAC(chan),			\
 		.scan_type = IIO_ST('u', bits, 16, shift)	\
 }
@@ -306,7 +306,7 @@ static int ad5686_read_raw(struct iio_dev *indio_dev,
 		*val = ret;
 		return IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		scale_uv = (st->vref_mv * 100000)
 			>> (chan->scan_type.realbits);
 		*val =  scale_uv / 100000;
@@ -437,6 +437,7 @@ static const struct spi_device_id ad5686_id[] = {
 	{"ad5686", ID_AD5686},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad5686_id);
 
 static struct spi_driver ad5686_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/dac/ad5764.c b/drivers/staging/iio/dac/ad5764.c
new file mode 100644
index 00000000000..ff91480ae65
--- /dev/null
+++ b/drivers/staging/iio/dac/ad5764.c
@@ -0,0 +1,393 @@
+/*
+ * Analog devices AD5764, AD5764R, AD5744, AD5744R quad-channel
+ * Digital to Analog Converters driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/regulator/consumer.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "dac.h"
+
+#define AD5764_REG_SF_NOP			0x0
+#define AD5764_REG_SF_CONFIG			0x1
+#define AD5764_REG_SF_CLEAR			0x4
+#define AD5764_REG_SF_LOAD			0x5
+#define AD5764_REG_DATA(x)			((2 << 3) | (x))
+#define AD5764_REG_COARSE_GAIN(x)		((3 << 3) | (x))
+#define AD5764_REG_FINE_GAIN(x)			((4 << 3) | (x))
+#define AD5764_REG_OFFSET(x)			((5 << 3) | (x))
+
+#define AD5764_NUM_CHANNELS 4
+
+/**
+ * struct ad5764_chip_info - chip specific information
+ * @int_vref:	Value of the internal reference voltage in uV - 0 if external
+ *		reference voltage is used
+ * @channel	channel specification
+*/
+
+struct ad5764_chip_info {
+	unsigned long int_vref;
+	const struct iio_chan_spec *channels;
+};
+
+/**
+ * struct ad5764_state - driver instance specific data
+ * @spi:		spi_device
+ * @chip_info:		chip info
+ * @vref_reg:		vref supply regulators
+ * @data:		spi transfer buffers
+ */
+
+struct ad5764_state {
+	struct spi_device		*spi;
+	const struct ad5764_chip_info	*chip_info;
+	struct regulator_bulk_data	vref_reg[2];
+
+	/*
+	 * DMA (thus cache coherency maintenance) requires the
+	 * transfer buffers to live in their own cache lines.
+	 */
+	union {
+		__be32 d32;
+		u8 d8[4];
+	} data[2] ____cacheline_aligned;
+};
+
+enum ad5764_type {
+	ID_AD5744,
+	ID_AD5744R,
+	ID_AD5764,
+	ID_AD5764R,
+};
+
+#define AD5764_CHANNEL(_chan, _bits) {				\
+	.type = IIO_VOLTAGE,					\
+	.indexed = 1,						\
+	.output = 1,						\
+	.channel = (_chan),					\
+	.address = (_chan),					\
+	.info_mask = IIO_CHAN_INFO_OFFSET_SHARED_BIT |		\
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT |		\
+		IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |		\
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,		\
+	.scan_type = IIO_ST('u', (_bits), 16, 16 - (_bits))	\
+}
+
+#define DECLARE_AD5764_CHANNELS(_name, _bits) \
+const struct iio_chan_spec _name##_channels[] = { \
+	AD5764_CHANNEL(0, (_bits)), \
+	AD5764_CHANNEL(1, (_bits)), \
+	AD5764_CHANNEL(2, (_bits)), \
+	AD5764_CHANNEL(3, (_bits)), \
+};
+
+static DECLARE_AD5764_CHANNELS(ad5764, 16);
+static DECLARE_AD5764_CHANNELS(ad5744, 14);
+
+static const struct ad5764_chip_info ad5764_chip_infos[] = {
+	[ID_AD5744] = {
+		.int_vref = 0,
+		.channels = ad5744_channels,
+	},
+	[ID_AD5744R] = {
+		.int_vref = 5000000,
+		.channels = ad5744_channels,
+	},
+	[ID_AD5764] = {
+		.int_vref = 0,
+		.channels = ad5764_channels,
+	},
+	[ID_AD5764R] = {
+		.int_vref = 5000000,
+		.channels = ad5764_channels,
+	},
+};
+
+static int ad5764_write(struct iio_dev *indio_dev, unsigned int reg,
+	unsigned int val)
+{
+	struct ad5764_state *st = iio_priv(indio_dev);
+	int ret;
+
+	mutex_lock(&indio_dev->mlock);
+	st->data[0].d32 = cpu_to_be32((reg << 16) | val);
+
+	ret = spi_write(st->spi, &st->data[0].d8[1], 3);
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret;
+}
+
+static int ad5764_read(struct iio_dev *indio_dev, unsigned int reg,
+	unsigned int *val)
+{
+	struct ad5764_state *st = iio_priv(indio_dev);
+	struct spi_message m;
+	int ret;
+	struct spi_transfer t[] = {
+		{
+			.tx_buf = &st->data[0].d8[1],
+			.len = 3,
+			.cs_change = 1,
+		}, {
+			.rx_buf = &st->data[1].d8[1],
+			.len = 3,
+		},
+	};
+
+	spi_message_init(&m);
+	spi_message_add_tail(&t[0], &m);
+	spi_message_add_tail(&t[1], &m);
+
+	mutex_lock(&indio_dev->mlock);
+
+	st->data[0].d32 = cpu_to_be32((1 << 23) | (reg << 16));
+
+	ret = spi_sync(st->spi, &m);
+	if (ret >= 0)
+		*val = be32_to_cpu(st->data[1].d32) & 0xffff;
+
+	mutex_unlock(&indio_dev->mlock);
+
+	return ret;
+}
+
+static int ad5764_chan_info_to_reg(struct iio_chan_spec const *chan, long info)
+{
+	switch (info) {
+	case 0:
+		return AD5764_REG_DATA(chan->address);
+	case IIO_CHAN_INFO_CALIBBIAS:
+		return AD5764_REG_OFFSET(chan->address);
+	case IIO_CHAN_INFO_CALIBSCALE:
+		return AD5764_REG_FINE_GAIN(chan->address);
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int ad5764_write_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int val, int val2, long info)
+{
+	const int max_val = (1 << chan->scan_type.realbits);
+	unsigned int reg;
+
+	switch (info) {
+	case 0:
+		if (val >= max_val || val < 0)
+			return -EINVAL;
+		val <<= chan->scan_type.shift;
+		break;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		if (val >= 128 || val < -128)
+			return -EINVAL;
+		break;
+	case IIO_CHAN_INFO_CALIBSCALE:
+		if (val >= 32 || val < -32)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	reg = ad5764_chan_info_to_reg(chan, info);
+	return ad5764_write(indio_dev, reg, (u16)val);
+}
+
+static int ad5764_get_channel_vref(struct ad5764_state *st,
+	unsigned int channel)
+{
+	if (st->chip_info->int_vref)
+		return st->chip_info->int_vref;
+	else
+		return regulator_get_voltage(st->vref_reg[channel / 2].consumer);
+}
+
+static int ad5764_read_raw(struct iio_dev *indio_dev,
+	struct iio_chan_spec const *chan, int *val, int *val2, long info)
+{
+	struct ad5764_state *st = iio_priv(indio_dev);
+	unsigned long scale_uv;
+	unsigned int reg;
+	int vref;
+	int ret;
+
+	switch (info) {
+	case 0:
+		reg = AD5764_REG_DATA(chan->address);
+		ret = ad5764_read(indio_dev, reg, val);
+		if (ret < 0)
+			return ret;
+		*val >>= chan->scan_type.shift;
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		reg = AD5764_REG_OFFSET(chan->address);
+		ret = ad5764_read(indio_dev, reg, val);
+		if (ret < 0)
+			return ret;
+		*val = sign_extend32(*val, 7);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_CALIBSCALE:
+		reg = AD5764_REG_FINE_GAIN(chan->address);
+		ret = ad5764_read(indio_dev, reg, val);
+		if (ret < 0)
+			return ret;
+		*val = sign_extend32(*val, 5);
+		return IIO_VAL_INT;
+	case IIO_CHAN_INFO_SCALE:
+		/* vout = 4 * vref + ((dac_code / 65535) - 0.5) */
+		vref = ad5764_get_channel_vref(st, chan->channel);
+		if (vref < 0)
+			return vref;
+
+		scale_uv = (vref * 4 * 100) >> chan->scan_type.realbits;
+		*val = scale_uv / 100000;
+		*val2 = (scale_uv % 100000) * 10;
+		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_OFFSET:
+		*val = -(1 << chan->scan_type.realbits) / 2;
+		return IIO_VAL_INT;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info ad5764_info = {
+	.read_raw = ad5764_read_raw,
+	.write_raw = ad5764_write_raw,
+	.driver_module = THIS_MODULE,
+};
+
+static int __devinit ad5764_probe(struct spi_device *spi)
+{
+	enum ad5764_type type = spi_get_device_id(spi)->driver_data;
+	struct iio_dev *indio_dev;
+	struct ad5764_state *st;
+	int ret;
+
+	indio_dev = iio_allocate_device(sizeof(*st));
+	if (indio_dev == NULL) {
+		dev_err(&spi->dev, "Failed to allocate iio device\n");
+		return -ENOMEM;
+	}
+
+	st = iio_priv(indio_dev);
+	spi_set_drvdata(spi, indio_dev);
+
+	st->spi = spi;
+	st->chip_info = &ad5764_chip_infos[type];
+
+	indio_dev->dev.parent = &spi->dev;
+	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->info = &ad5764_info;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->num_channels = AD5764_NUM_CHANNELS;
+	indio_dev->channels = st->chip_info->channels;
+
+	if (st->chip_info->int_vref == 0) {
+		st->vref_reg[0].supply = "vrefAB";
+		st->vref_reg[1].supply = "vrefCD";
+
+		ret = regulator_bulk_get(&st->spi->dev,
+			ARRAY_SIZE(st->vref_reg), st->vref_reg);
+		if (ret) {
+			dev_err(&spi->dev, "Failed to request vref regulators: %d\n",
+				ret);
+			goto error_free;
+		}
+
+		ret = regulator_bulk_enable(ARRAY_SIZE(st->vref_reg),
+			st->vref_reg);
+		if (ret) {
+			dev_err(&spi->dev, "Failed to enable vref regulators: %d\n",
+				ret);
+			goto error_free_reg;
+		}
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&spi->dev, "Failed to register iio device: %d\n", ret);
+		goto error_disable_reg;
+	}
+
+	return 0;
+
+error_disable_reg:
+	if (st->chip_info->int_vref == 0)
+		regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+error_free_reg:
+	if (st->chip_info->int_vref == 0)
+		regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+error_free:
+	iio_free_device(indio_dev);
+
+	return ret;
+}
+
+static int __devexit ad5764_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ad5764_state *st = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+
+	if (st->chip_info->int_vref == 0) {
+		regulator_bulk_disable(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+		regulator_bulk_free(ARRAY_SIZE(st->vref_reg), st->vref_reg);
+	}
+
+	iio_free_device(indio_dev);
+
+	return 0;
+}
+
+static const struct spi_device_id ad5764_ids[] = {
+	{ "ad5744", ID_AD5744 },
+	{ "ad5744r", ID_AD5744R },
+	{ "ad5764", ID_AD5764 },
+	{ "ad5764r", ID_AD5764R },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, ad5764_ids);
+
+static struct spi_driver ad5764_driver = {
+	.driver = {
+		.name = "ad5764",
+		.owner = THIS_MODULE,
+	},
+	.probe = ad5764_probe,
+	.remove = __devexit_p(ad5764_remove),
+	.id_table = ad5764_ids,
+};
+
+static int __init ad5764_spi_init(void)
+{
+	return spi_register_driver(&ad5764_driver);
+}
+module_init(ad5764_spi_init);
+
+static void __exit ad5764_spi_exit(void)
+{
+	spi_unregister_driver(&ad5764_driver);
+}
+module_exit(ad5764_spi_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("Analog Devices AD5744/AD5744R/AD5764/AD5764R DAC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dac/ad5791.c b/drivers/staging/iio/dac/ad5791.c
index 4a80fd82223..ac45636a8d7 100644
--- a/drivers/staging/iio/dac/ad5791.c
+++ b/drivers/staging/iio/dac/ad5791.c
@@ -1,5 +1,6 @@
 /*
- * AD5760, AD5780, AD5781, AD5791 Voltage Output Digital to Analog Converter
+ * AD5760, AD5780, AD5781, AD5790, AD5791 Voltage Output Digital to Analog
+ * Converter
  *
  * Copyright 2011 Analog Devices Inc.
  *
@@ -77,8 +78,8 @@ static int ad5791_spi_read(struct spi_device *spi, u8 addr, u32 *val)
 	.indexed = 1,					\
 	.address = AD5791_ADDR_DAC0,			\
 	.channel = 0,					\
-	.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED) | \
-		(1 << IIO_CHAN_INFO_OFFSET_SHARED),	\
+	.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT | \
+		IIO_CHAN_INFO_OFFSET_SHARED_BIT,	\
 	.scan_type = IIO_ST('u', bits, 24, shift)	\
 }
 
@@ -237,11 +238,11 @@ static int ad5791_read_raw(struct iio_dev *indio_dev,
 		*val &= AD5791_DAC_MASK;
 		*val >>= chan->scan_type.shift;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
 		*val2 = (((u64)st->vref_mv) * 1000000ULL) >> chan->scan_type.realbits;
 		return IIO_VAL_INT_PLUS_MICRO;
-	case (1 << IIO_CHAN_INFO_OFFSET_SHARED):
+	case IIO_CHAN_INFO_OFFSET:
 		val64 = (((u64)st->vref_neg_mv) << chan->scan_type.realbits);
 		do_div(val64, st->vref_mv);
 		*val = -val64;
@@ -397,9 +398,11 @@ static const struct spi_device_id ad5791_id[] = {
 	{"ad5760", ID_AD5760},
 	{"ad5780", ID_AD5780},
 	{"ad5781", ID_AD5781},
+	{"ad5790", ID_AD5791},
 	{"ad5791", ID_AD5791},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad5791_id);
 
 static struct spi_driver ad5791_driver = {
 	.driver = {
@@ -413,5 +416,5 @@ static struct spi_driver ad5791_driver = {
 module_spi_driver(ad5791_driver);
 
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5791 DAC");
+MODULE_DESCRIPTION("Analog Devices AD5760/AD5780/AD5781/AD5790/AD5791 DAC");
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/dds/ad5930.c b/drivers/staging/iio/dds/ad5930.c
index 4a360d044a3..9c32d1beae2 100644
--- a/drivers/staging/iio/dds/ad5930.c
+++ b/drivers/staging/iio/dds/ad5930.c
@@ -148,3 +148,4 @@ module_spi_driver(ad5930_driver);
 MODULE_AUTHOR("Cliff Cai");
 MODULE_DESCRIPTION("Analog Devices ad5930 driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:" DRV_NAME);
diff --git a/drivers/staging/iio/dds/ad9832.c b/drivers/staging/iio/dds/ad9832.c
index cc32fd65b8b..2ccf25dd928 100644
--- a/drivers/staging/iio/dds/ad9832.c
+++ b/drivers/staging/iio/dds/ad9832.c
@@ -88,7 +88,7 @@ static ssize_t ad9832_write(struct device *dev,
 		goto error_ret;
 
 	mutex_lock(&indio_dev->mlock);
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD9832_FREQ0HM:
 	case AD9832_FREQ1HM:
 		ret = ad9832_write_frequency(st, this_attr->address, val);
@@ -344,11 +344,11 @@ static const struct spi_device_id ad9832_id[] = {
 	{"ad9835", 0},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad9832_id);
 
 static struct spi_driver ad9832_driver = {
 	.driver = {
 		.name	= "ad9832",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad9832_probe,
@@ -360,4 +360,3 @@ module_spi_driver(ad9832_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD9832/AD9835 DDS");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad9832");
diff --git a/drivers/staging/iio/dds/ad9834.c b/drivers/staging/iio/dds/ad9834.c
index 51fda6f6981..5e67104fea1 100644
--- a/drivers/staging/iio/dds/ad9834.c
+++ b/drivers/staging/iio/dds/ad9834.c
@@ -77,7 +77,7 @@ static ssize_t ad9834_write(struct device *dev,
 		goto error_ret;
 
 	mutex_lock(&indio_dev->mlock);
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD9834_REG_FREQ0:
 	case AD9834_REG_FREQ1:
 		ret = ad9834_write_frequency(st, this_attr->address, val);
@@ -153,7 +153,7 @@ static ssize_t ad9834_store_wavetype(struct device *dev,
 
 	mutex_lock(&indio_dev->mlock);
 
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case 0:
 		if (sysfs_streq(buf, "sine")) {
 			st->control &= ~AD9834_MODE;
@@ -435,11 +435,11 @@ static const struct spi_device_id ad9834_id[] = {
 	{"ad9838", ID_AD9838},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad9834_id);
 
 static struct spi_driver ad9834_driver = {
 	.driver = {
 		.name	= "ad9834",
-		.bus	= &spi_bus_type,
 		.owner	= THIS_MODULE,
 	},
 	.probe		= ad9834_probe,
@@ -451,4 +451,3 @@ module_spi_driver(ad9834_driver);
 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
 MODULE_DESCRIPTION("Analog Devices AD9833/AD9834/AD9837/AD9838 DDS");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:ad9834");
diff --git a/drivers/staging/iio/dds/ad9850.c b/drivers/staging/iio/dds/ad9850.c
index f9c96afcb99..f4f731bb219 100644
--- a/drivers/staging/iio/dds/ad9850.c
+++ b/drivers/staging/iio/dds/ad9850.c
@@ -134,3 +134,4 @@ module_spi_driver(ad9850_driver);
 MODULE_AUTHOR("Cliff Cai");
 MODULE_DESCRIPTION("Analog Devices ad9850 driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:" DRV_NAME);
diff --git a/drivers/staging/iio/dds/ad9852.c b/drivers/staging/iio/dds/ad9852.c
index 9fc73fdc9c3..554266c615a 100644
--- a/drivers/staging/iio/dds/ad9852.c
+++ b/drivers/staging/iio/dds/ad9852.c
@@ -285,3 +285,4 @@ module_spi_driver(ad9852_driver);
 MODULE_AUTHOR("Cliff Cai");
 MODULE_DESCRIPTION("Analog Devices ad9852 driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:" DRV_NAME);
diff --git a/drivers/staging/iio/dds/ad9910.c b/drivers/staging/iio/dds/ad9910.c
index 57046b03121..3985766d6f8 100644
--- a/drivers/staging/iio/dds/ad9910.c
+++ b/drivers/staging/iio/dds/ad9910.c
@@ -418,3 +418,4 @@ module_spi_driver(ad9910_driver);
 MODULE_AUTHOR("Cliff Cai");
 MODULE_DESCRIPTION("Analog Devices ad9910 driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:" DRV_NAME);
diff --git a/drivers/staging/iio/dds/ad9951.c b/drivers/staging/iio/dds/ad9951.c
index d29130e9acd..4d150048002 100644
--- a/drivers/staging/iio/dds/ad9951.c
+++ b/drivers/staging/iio/dds/ad9951.c
@@ -229,3 +229,4 @@ module_spi_driver(ad9951_driver);
 MODULE_AUTHOR("Cliff Cai");
 MODULE_DESCRIPTION("Analog Devices ad9951 driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:" DRV_NAME);
diff --git a/drivers/staging/iio/events.h b/drivers/staging/iio/events.h
new file mode 100644
index 00000000000..bfb63400fa6
--- /dev/null
+++ b/drivers/staging/iio/events.h
@@ -0,0 +1,103 @@
+/* The industrial I/O - event passing to userspace
+ *
+ * Copyright (c) 2008-2011 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#ifndef _IIO_EVENTS_H_
+#define _IIO_EVENTS_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+#include "types.h"
+
+/**
+ * struct iio_event_data - The actual event being pushed to userspace
+ * @id:		event identifier
+ * @timestamp:	best estimate of time of event occurrence (often from
+ *		the interrupt handler)
+ */
+struct iio_event_data {
+	__u64	id;
+	__s64	timestamp;
+};
+
+#define IIO_GET_EVENT_FD_IOCTL _IOR('i', 0x90, int)
+
+enum iio_event_type {
+	IIO_EV_TYPE_THRESH,
+	IIO_EV_TYPE_MAG,
+	IIO_EV_TYPE_ROC,
+	IIO_EV_TYPE_THRESH_ADAPTIVE,
+	IIO_EV_TYPE_MAG_ADAPTIVE,
+};
+
+enum iio_event_direction {
+	IIO_EV_DIR_EITHER,
+	IIO_EV_DIR_RISING,
+	IIO_EV_DIR_FALLING,
+};
+
+/**
+ * IIO_EVENT_CODE() - create event identifier
+ * @chan_type:	Type of the channel. Should be one of enum iio_chan_type.
+ * @diff:	Whether the event is for an differential channel or not.
+ * @modifier:	Modifier for the channel. Should be one of enum iio_modifier.
+ * @direction:	Direction of the event. One of enum iio_event_direction.
+ * @type:	Type of the event. Should be one enum iio_event_type.
+ * @chan:	Channel number for non-differential channels.
+ * @chan1:	First channel number for differential channels.
+ * @chan2:	Second channel number for differential channels.
+ */
+
+#define IIO_EVENT_CODE(chan_type, diff, modifier, direction,		\
+		       type, chan, chan1, chan2)			\
+	(((u64)type << 56) | ((u64)diff << 55) |			\
+	 ((u64)direction << 48) | ((u64)modifier << 40) |		\
+	 ((u64)chan_type << 32) | (((u16)chan2) << 16) | ((u16)chan1) | \
+	 ((u16)chan))
+
+
+#define IIO_EV_DIR_MAX 4
+#define IIO_EV_BIT(type, direction)			\
+	(1 << (type*IIO_EV_DIR_MAX + direction))
+
+/**
+ * IIO_MOD_EVENT_CODE() - create event identifier for modified channels
+ * @chan_type:	Type of the channel. Should be one of enum iio_chan_type.
+ * @number:	Channel number.
+ * @modifier:	Modifier for the channel. Should be one of enum iio_modifier.
+ * @type:	Type of the event. Should be one enum iio_event_type.
+ * @direction:	Direction of the event. One of enum iio_event_direction.
+ */
+
+#define IIO_MOD_EVENT_CODE(chan_type, number, modifier,		\
+			   type, direction)				\
+	IIO_EVENT_CODE(chan_type, 0, modifier, direction, type, number, 0, 0)
+
+/**
+ * IIO_UNMOD_EVENT_CODE() - create event identifier for unmodified channels
+ * @chan_type:	Type of the channel. Should be one of enum iio_chan_type.
+ * @number:	Channel number.
+ * @type:	Type of the event. Should be one enum iio_event_type.
+ * @direction:	Direction of the event. One of enum iio_event_direction.
+ */
+
+#define IIO_UNMOD_EVENT_CODE(chan_type, number, type, direction)	\
+	IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0)
+
+#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
+
+#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0xCF)
+
+#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
+
+/* Event code number extraction depends on which type of event we have.
+ * Perhaps review this function in the future*/
+#define IIO_EVENT_CODE_EXTRACT_NUM(mask) ((__s16)(mask & 0xFFFF))
+
+#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
+
+#endif
diff --git a/drivers/staging/iio/gyro/Kconfig b/drivers/staging/iio/gyro/Kconfig
index 22aea5b4e61..ea295b25308 100644
--- a/drivers/staging/iio/gyro/Kconfig
+++ b/drivers/staging/iio/gyro/Kconfig
@@ -37,11 +37,11 @@ config ADIS16260
 	  will be called adis16260.
 
 config ADXRS450
-	tristate "Analog Devices ADXRS450 Digital Output Gyroscope SPI driver"
+	tristate "Analog Devices ADXRS450/3 Digital Output Gyroscope SPI driver"
 	depends on SPI
 	help
-	  Say yes here to build support for Analog Devices ADXRS450 programmable
-	  digital output gyroscope.
+	  Say yes here to build support for Analog Devices ADXRS450 and ADXRS453
+	  programmable digital output gyroscope.
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called adxrs450.
diff --git a/drivers/staging/iio/gyro/adis16060_core.c b/drivers/staging/iio/gyro/adis16060_core.c
index ff1b5a82b3d..c0ca7093e0e 100644
--- a/drivers/staging/iio/gyro/adis16060_core.c
+++ b/drivers/staging/iio/gyro/adis16060_core.c
@@ -98,11 +98,11 @@ static int adis16060_read_raw(struct iio_dev *indio_dev,
 		mutex_unlock(&indio_dev->mlock);
 		*val = tval;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = -7;
 		*val2 = 461117;
 		return IIO_VAL_INT_PLUS_MICRO;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
 		*val2 = 34000;
 		return IIO_VAL_INT_PLUS_MICRO;
@@ -136,8 +136,8 @@ static const struct iio_chan_spec adis16060_channels[] = {
 		.type = IIO_TEMP,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = ADIS16060_TEMP_OUT,
 	}
 };
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c
index 9405f2d368e..1815490db8b 100644
--- a/drivers/staging/iio/gyro/adis16080_core.c
+++ b/drivers/staging/iio/gyro/adis16080_core.c
@@ -194,3 +194,4 @@ module_spi_driver(adis16080_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADIS16080/100 Yaw Rate Gyroscope Driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16080");
diff --git a/drivers/staging/iio/gyro/adis16130_core.c b/drivers/staging/iio/gyro/adis16130_core.c
index c9aaca9631f..947eb86f05d 100644
--- a/drivers/staging/iio/gyro/adis16130_core.c
+++ b/drivers/staging/iio/gyro/adis16130_core.c
@@ -173,3 +173,4 @@ module_spi_driver(adis16130_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADIS16130 High Precision Angular Rate");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:adis16130");
diff --git a/drivers/staging/iio/gyro/adis16260_core.c b/drivers/staging/iio/gyro/adis16260_core.c
index 886dddf867e..8f6af47e955 100644
--- a/drivers/staging/iio/gyro/adis16260_core.c
+++ b/drivers/staging/iio/gyro/adis16260_core.c
@@ -20,7 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 
 #include "adis16260.h"
 
@@ -390,9 +390,9 @@ enum adis16260_channel {
 #define ADIS16260_GYRO_CHANNEL_SET(axis, mod)				\
 	struct iio_chan_spec adis16260_channels_##axis[] = {		\
 		IIO_CHAN(IIO_ANGL_VEL, 1, 0, 0, NULL, 0, mod,		\
-			 (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |	\
-			 (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) |	\
-			 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),		\
+			 IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |	\
+			 IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |	\
+			 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,		\
 			 gyro, ADIS16260_SCAN_GYRO,			\
 			 IIO_ST('s', 14, 16, 0), 0),			\
 		IIO_CHAN(IIO_ANGL, 1, 0, 0, NULL, 0, mod,		\
@@ -400,16 +400,16 @@ enum adis16260_channel {
 			 angle, ADIS16260_SCAN_ANGL,			\
 			 IIO_ST('u', 14, 16, 0), 0),			\
 		IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0,			\
-			 (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |		\
-			 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),		\
+			 IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |		\
+			 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,		\
 			 temp, ADIS16260_SCAN_TEMP,			\
 			 IIO_ST('u', 12, 16, 0), 0),			\
 		IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "supply", 0, 0,		\
-			 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),		\
+			 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,		\
 			 in_supply, ADIS16260_SCAN_SUPPLY,		\
 			 IIO_ST('u', 12, 16, 0), 0),			\
 		IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, NULL, 1, 0,		\
-			 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),		\
+			 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,		\
 			 in_aux, ADIS16260_SCAN_AUX_ADC,		\
 			 IIO_ST('u', 12, 16, 0), 0),			\
 		IIO_CHAN_SOFT_TIMESTAMP(5)				\
@@ -464,8 +464,7 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_ANGL_VEL:
 			*val = 0;
@@ -489,10 +488,10 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 			return -EINVAL;
 		}
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		*val = 25;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		switch (chan->type) {
 		case IIO_ANGL_VEL:
 			bits = 12;
@@ -512,7 +511,7 @@ static int adis16260_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		switch (chan->type) {
 		case IIO_ANGL_VEL:
 			bits = 12;
@@ -544,11 +543,11 @@ static int adis16260_write_raw(struct iio_dev *indio_dev,
 	s16 val16;
 	u8 addr;
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		val16 = val & ((1 << bits) - 1);
 		addr = adis16260_addresses[chan->address][1];
 		return adis16260_spi_write_reg_16(indio_dev, addr, val16);
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		val16 = val & ((1 << bits) - 1);
 		addr = adis16260_addresses[chan->address][2];
 		return adis16260_spi_write_reg_16(indio_dev, addr, val16);
@@ -633,11 +632,16 @@ static int __devinit adis16260_probe(struct spi_device *spi)
 	}
 	if (indio_dev->buffer) {
 		/* Set default scan mode */
-		iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_SUPPLY);
-		iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_GYRO);
-		iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_AUX_ADC);
-		iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_TEMP);
-		iio_scan_mask_set(indio_dev->buffer, ADIS16260_SCAN_ANGL);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer,
+				  ADIS16260_SCAN_SUPPLY);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer,
+				  ADIS16260_SCAN_GYRO);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer,
+				  ADIS16260_SCAN_AUX_ADC);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer,
+				  ADIS16260_SCAN_TEMP);
+		iio_scan_mask_set(indio_dev, indio_dev->buffer,
+				  ADIS16260_SCAN_ANGL);
 	}
 	if (spi->irq) {
 		ret = adis16260_probe_trigger(indio_dev);
@@ -701,6 +705,7 @@ static const struct spi_device_id adis16260_id[] = {
 	{"adis16251", 1},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, adis16260_id);
 
 static struct spi_driver adis16260_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/gyro/adis16260_ring.c b/drivers/staging/iio/gyro/adis16260_ring.c
index 52a9e784e7c..699a6152c40 100644
--- a/drivers/staging/iio/gyro/adis16260_ring.c
+++ b/drivers/staging/iio/gyro/adis16260_ring.c
@@ -74,9 +74,10 @@ static irqreturn_t adis16260_trigger_handler(int irq, void *p)
 		return -ENOMEM;
 	}
 
-	if (ring->scan_count &&
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength) &&
 	    adis16260_read_ring_data(&indio_dev->dev, st->rx) >= 0)
-		for (; i < ring->scan_count; i++)
+		for (; i < bitmap_weight(indio_dev->active_scan_mask,
+					 indio_dev->masklength); i++)
 			data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
 
 	/* Guaranteed to be aligned with 8 byte boundary */
@@ -116,10 +117,8 @@ int adis16260_configure_ring(struct iio_dev *indio_dev)
 	indio_dev->buffer = ring;
 	/* Effectively select the ring buffer implementation */
 	ring->access = &ring_sw_access_funcs;
-	ring->bpe = 2;
 	ring->scan_timestamp = true;
-	ring->setup_ops = &adis16260_ring_setup_ops;
-	ring->owner = THIS_MODULE;
+	indio_dev->setup_ops = &adis16260_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &adis16260_trigger_handler,
diff --git a/drivers/staging/iio/gyro/adxrs450.h b/drivers/staging/iio/gyro/adxrs450.h
index b6b68287640..af0c870100b 100644
--- a/drivers/staging/iio/gyro/adxrs450.h
+++ b/drivers/staging/iio/gyro/adxrs450.h
@@ -39,6 +39,11 @@
 
 #define ADXRS450_GET_ST(a)	((a >> 26) & 0x3)
 
+enum {
+	ID_ADXRS450,
+	ID_ADXRS453,
+};
+
 /**
  * struct adxrs450_state - device instance specific data
  * @us:			actual spi_device
diff --git a/drivers/staging/iio/gyro/adxrs450_core.c b/drivers/staging/iio/gyro/adxrs450_core.c
index 70fd468b685..15e2496f70c 100644
--- a/drivers/staging/iio/gyro/adxrs450_core.c
+++ b/drivers/staging/iio/gyro/adxrs450_core.c
@@ -1,5 +1,5 @@
 /*
- * ADXRS450 Digital Output Gyroscope Driver
+ * ADXRS450/ADXRS453 Digital Output Gyroscope Driver
  *
  * Copyright 2011 Analog Devices Inc.
  *
@@ -243,7 +243,7 @@ static int adxrs450_write_raw(struct iio_dev *indio_dev,
 {
 	int ret;
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		ret = adxrs450_spi_write_reg_16(indio_dev,
 						ADXRS450_DNC1,
 						val & 0x3FF);
@@ -263,7 +263,7 @@ static int adxrs450_read_raw(struct iio_dev *indio_dev,
 {
 	int ret;
 	s16 t;
-	u16 ut;
+
 	switch (mask) {
 	case 0:
 		switch (chan->type) {
@@ -276,10 +276,10 @@ static int adxrs450_read_raw(struct iio_dev *indio_dev,
 			break;
 		case IIO_TEMP:
 			ret = adxrs450_spi_read_reg_16(indio_dev,
-						       ADXRS450_TEMP1, &ut);
+						       ADXRS450_TEMP1, &t);
 			if (ret)
 				break;
-			*val = ut;
+			*val = (t >> 6) + 225;
 			ret = IIO_VAL_INT;
 			break;
 		default:
@@ -287,13 +287,34 @@ static int adxrs450_read_raw(struct iio_dev *indio_dev,
 			break;
 		}
 		break;
-	case (1 << IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->type) {
+		case IIO_ANGL_VEL:
+			*val = 0;
+			*val2 = 218166;
+			return IIO_VAL_INT_PLUS_NANO;
+		case IIO_TEMP:
+			*val = 200;
+			*val2 = 0;
+			return IIO_VAL_INT;
+		default:
+			return -EINVAL;
+		}
+		break;
+	case IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW:
 		ret = adxrs450_spi_read_reg_16(indio_dev, ADXRS450_QUAD1, &t);
 		if (ret)
 			break;
 		*val = t;
 		ret = IIO_VAL_INT;
 		break;
+	case IIO_CHAN_INFO_CALIBBIAS:
+		ret = adxrs450_spi_read_reg_16(indio_dev, ADXRS450_DNC1, &t);
+		if (ret)
+			break;
+		*val = t;
+		ret = IIO_VAL_INT;
+		break;
 	default:
 		ret = -EINVAL;
 		break;
@@ -302,18 +323,36 @@ static int adxrs450_read_raw(struct iio_dev *indio_dev,
 	return ret;
 }
 
-static const struct iio_chan_spec adxrs450_channels[] = {
-	{
-		.type = IIO_ANGL_VEL,
-		.modified = 1,
-		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE)
-	}, {
-		.type = IIO_TEMP,
-		.indexed = 1,
-		.channel = 0,
-	}
+static const struct iio_chan_spec adxrs450_channels[2][2] = {
+	[ID_ADXRS450] = {
+		{
+			.type = IIO_ANGL_VEL,
+			.modified = 1,
+			.channel2 = IIO_MOD_Z,
+			.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+			IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE_BIT |
+			IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
+		}, {
+			.type = IIO_TEMP,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
+		}
+	},
+	[ID_ADXRS453] = {
+		{
+			.type = IIO_ANGL_VEL,
+			.modified = 1,
+			.channel2 = IIO_MOD_Z,
+			.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+			IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE_BIT,
+		}, {
+			.type = IIO_TEMP,
+			.indexed = 1,
+			.channel = 0,
+			.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
+		}
+	},
 };
 
 static const struct iio_info adxrs450_info = {
@@ -343,7 +382,8 @@ static int __devinit adxrs450_probe(struct spi_device *spi)
 	indio_dev->dev.parent = &spi->dev;
 	indio_dev->info = &adxrs450_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->channels = adxrs450_channels;
+	indio_dev->channels =
+		adxrs450_channels[spi_get_device_id(spi)->driver_data];
 	indio_dev->num_channels = ARRAY_SIZE(adxrs450_channels);
 	indio_dev->name = spi->dev.driver->name;
 
@@ -373,6 +413,13 @@ static int adxrs450_remove(struct spi_device *spi)
 	return 0;
 }
 
+static const struct spi_device_id adxrs450_id[] = {
+	{"adxrs450", ID_ADXRS450},
+	{"adxrs453", ID_ADXRS453},
+	{}
+};
+MODULE_DEVICE_TABLE(spi, adxrs450_id);
+
 static struct spi_driver adxrs450_driver = {
 	.driver = {
 		.name = "adxrs450",
@@ -380,9 +427,10 @@ static struct spi_driver adxrs450_driver = {
 	},
 	.probe = adxrs450_probe,
 	.remove = __devexit_p(adxrs450_remove),
+	.id_table	= adxrs450_id,
 };
 module_spi_driver(adxrs450_driver);
 
 MODULE_AUTHOR("Cliff Cai <cliff.cai@xxxxxxxxxx>");
-MODULE_DESCRIPTION("Analog Devices ADXRS450 Gyroscope SPI driver");
+MODULE_DESCRIPTION("Analog Devices ADXRS450/ADXRS453 Gyroscope SPI driver");
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index f3d88cd7e8a..be6ced31f65 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -7,13 +7,12 @@
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  */
-
 #ifndef _INDUSTRIAL_IO_H_
 #define _INDUSTRIAL_IO_H_
 
 #include <linux/device.h>
 #include <linux/cdev.h>
-
+#include "types.h"
 /* IIO TODO LIST */
 /*
  * Provide means of adjusting timer accuracy.
@@ -25,62 +24,64 @@ enum iio_data_type {
 	IIO_PROCESSED,
 };
 
-enum iio_chan_type {
-	/* real channel types */
-	IIO_VOLTAGE,
-	IIO_CURRENT,
-	IIO_POWER,
-	IIO_ACCEL,
-	IIO_ANGL_VEL,
-	IIO_MAGN,
-	IIO_LIGHT,
-	IIO_INTENSITY,
-	IIO_PROXIMITY,
-	IIO_TEMP,
-	IIO_INCLI,
-	IIO_ROT,
-	IIO_ANGL,
-	IIO_TIMESTAMP,
-	IIO_CAPACITANCE,
-};
-
-enum iio_modifier {
-	IIO_NO_MOD,
-	IIO_MOD_X,
-	IIO_MOD_Y,
-	IIO_MOD_Z,
-	IIO_MOD_X_AND_Y,
-	IIO_MOD_X_ANX_Z,
-	IIO_MOD_Y_AND_Z,
-	IIO_MOD_X_AND_Y_AND_Z,
-	IIO_MOD_X_OR_Y,
-	IIO_MOD_X_OR_Z,
-	IIO_MOD_Y_OR_Z,
-	IIO_MOD_X_OR_Y_OR_Z,
-	IIO_MOD_LIGHT_BOTH,
-	IIO_MOD_LIGHT_IR,
-};
-
 /* Could add the raw attributes as well - allowing buffer only devices */
 enum iio_chan_info_enum {
-	IIO_CHAN_INFO_SCALE_SHARED,
-	IIO_CHAN_INFO_SCALE_SEPARATE,
-	IIO_CHAN_INFO_OFFSET_SHARED,
-	IIO_CHAN_INFO_OFFSET_SEPARATE,
-	IIO_CHAN_INFO_CALIBSCALE_SHARED,
-	IIO_CHAN_INFO_CALIBSCALE_SEPARATE,
-	IIO_CHAN_INFO_CALIBBIAS_SHARED,
-	IIO_CHAN_INFO_CALIBBIAS_SEPARATE,
-	IIO_CHAN_INFO_PEAK_SHARED,
-	IIO_CHAN_INFO_PEAK_SEPARATE,
-	IIO_CHAN_INFO_PEAK_SCALE_SHARED,
-	IIO_CHAN_INFO_PEAK_SCALE_SEPARATE,
-	IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SHARED,
-	IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE,
-	IIO_CHAN_INFO_AVERAGE_RAW_SHARED,
-	IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE,
+	/* 0 is reserverd for raw attributes */
+	IIO_CHAN_INFO_SCALE = 1,
+	IIO_CHAN_INFO_OFFSET,
+	IIO_CHAN_INFO_CALIBSCALE,
+	IIO_CHAN_INFO_CALIBBIAS,
+	IIO_CHAN_INFO_PEAK,
+	IIO_CHAN_INFO_PEAK_SCALE,
+	IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW,
+	IIO_CHAN_INFO_AVERAGE_RAW,
+	IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY,
 };
 
+#define IIO_CHAN_INFO_SHARED_BIT(type) BIT(type*2)
+#define IIO_CHAN_INFO_SEPARATE_BIT(type) BIT(type*2 + 1)
+
+#define IIO_CHAN_INFO_SCALE_SEPARATE_BIT		\
+	IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_SCALE)
+#define IIO_CHAN_INFO_SCALE_SHARED_BIT			\
+	IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_SCALE)
+#define IIO_CHAN_INFO_OFFSET_SEPARATE_BIT			\
+	IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_OFFSET)
+#define IIO_CHAN_INFO_OFFSET_SHARED_BIT			\
+	IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_OFFSET)
+#define IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT			\
+	IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_CALIBSCALE)
+#define IIO_CHAN_INFO_CALIBSCALE_SHARED_BIT			\
+	IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_CALIBSCALE)
+#define IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT			\
+	IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_CALIBBIAS)
+#define IIO_CHAN_INFO_CALIBBIAS_SHARED_BIT			\
+	IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_CALIBBIAS)
+#define IIO_CHAN_INFO_PEAK_SEPARATE_BIT			\
+	IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PEAK)
+#define IIO_CHAN_INFO_PEAK_SHARED_BIT			\
+	IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_PEAK)
+#define IIO_CHAN_INFO_PEAKSCALE_SEPARATE_BIT			\
+	IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_PEAKSCALE)
+#define IIO_CHAN_INFO_PEAKSCALE_SHARED_BIT			\
+	IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_PEAKSCALE)
+#define IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE_BIT	\
+	IIO_CHAN_INFO_SEPARATE_BIT(				\
+		IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW)
+#define IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SHARED_BIT	\
+	IIO_CHAN_INFO_SHARED_BIT(				\
+		IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW)
+#define IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE_BIT			\
+	IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_AVERAGE_RAW)
+#define IIO_CHAN_INFO_AVERAGE_RAW_SHARED_BIT			\
+	IIO_CHAN_INFO_SHARED_BIT(IIO_CHAN_INFO_AVERAGE_RAW)
+#define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT \
+	IIO_CHAN_INFO_SHARED_BIT(			       \
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY)
+#define IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SEPARATE_BIT \
+	IIO_CHAN_INFO_SEPARATE_BIT(			       \
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY)
+
 enum iio_endian {
 	IIO_CPU,
 	IIO_BE,
@@ -109,6 +110,10 @@ enum iio_endian {
  * @extend_name:	Allows labeling of channel attributes with an
  *			informative name. Note this has no effect codes etc,
  *			unlike modifiers.
+ * @datasheet_name:	A name used in in kernel mapping of channels. It should
+ *			corrspond to the first name that the channel is referred
+ *			to by in the datasheet (e.g. IND), or the nearest
+ *			possible compound name (e.g. IND-INC).
  * @processed_val:	Flag to specify the data access attribute should be
  *			*_input rather than *_raw.
  * @modified:		Does a modifier apply to this channel. What these are
@@ -137,6 +142,7 @@ struct iio_chan_spec {
 	long			info_mask;
 	long			event_mask;
 	char			*extend_name;
+	const char		*datasheet_name;
 	unsigned		processed_val:1;
 	unsigned		modified:1;
 	unsigned		indexed:1;
@@ -261,7 +267,23 @@ struct iio_info {
 				 int val);
 	int (*validate_trigger)(struct iio_dev *indio_dev,
 				struct iio_trigger *trig);
+	int (*update_scan_mode)(struct iio_dev *indio_dev,
+				const unsigned long *scan_mask);
+};
 
+/**
+ * struct iio_buffer_setup_ops - buffer setup related callbacks
+ * @preenable:		[DRIVER] function to run prior to marking buffer enabled
+ * @postenable:		[DRIVER] function to run after marking buffer enabled
+ * @predisable:		[DRIVER] function to run prior to marking buffer
+ *			disabled
+ * @postdisable:	[DRIVER] function to run after marking buffer disabled
+ */
+struct iio_buffer_setup_ops {
+	int				(*preenable)(struct iio_dev *);
+	int				(*postenable)(struct iio_dev *);
+	int				(*predisable)(struct iio_dev *);
+	int				(*postdisable)(struct iio_dev *);
 };
 
 /**
@@ -278,6 +300,7 @@ struct iio_info {
  * @available_scan_masks: [DRIVER] optional array of allowed bitmasks
  * @masklength:		[INTERN] the length of the mask established from
  *			channels
+ * @active_scan_mask:	[INTERN] union of all scan masks requested by buffers
  * @trig:		[INTERN] current device trigger (buffer modes)
  * @pollfunc:		[DRIVER] function run on trigger being received
  * @channels:		[DRIVER] channel specification structure table
@@ -290,6 +313,7 @@ struct iio_info {
  * @chrdev:		[INTERN] associated character device
  * @groups:		[INTERN] attribute groups
  * @groupcounter:	[INTERN] index of next attribute group
+ * @flags:		[INTERN] file ops related flags including busy flag.
  **/
 struct iio_dev {
 	int				id;
@@ -305,6 +329,7 @@ struct iio_dev {
 
 	unsigned long			*available_scan_masks;
 	unsigned			masklength;
+	unsigned long			*active_scan_mask;
 	struct iio_trigger		*trig;
 	struct iio_poll_func		*pollfunc;
 
@@ -315,13 +340,24 @@ struct iio_dev {
 	struct attribute_group		chan_attr_group;
 	const char			*name;
 	const struct iio_info		*info;
+	const struct iio_buffer_setup_ops	*setup_ops;
 	struct cdev			chrdev;
 #define IIO_MAX_GROUPS 6
 	const struct attribute_group	*groups[IIO_MAX_GROUPS + 1];
 	int				groupcounter;
+
+	unsigned long			flags;
 };
 
 /**
+ * iio_find_channel_from_si() - get channel from its scan index
+ * @indio_dev:		device
+ * @si:			scan index to match
+ */
+const struct iio_chan_spec
+*iio_find_channel_from_si(struct iio_dev *indio_dev, int si);
+
+/**
  * iio_device_register() - register a device with the IIO subsystem
  * @indio_dev:		Device structure filled by the device driver
  **/
diff --git a/drivers/staging/iio/iio_core.h b/drivers/staging/iio/iio_core.h
index 36159e0dbfc..107cfb1cbb0 100644
--- a/drivers/staging/iio/iio_core.h
+++ b/drivers/staging/iio/iio_core.h
@@ -33,9 +33,6 @@ int __iio_add_chan_devattr(const char *postfix,
 #ifdef CONFIG_IIO_BUFFER
 struct poll_table_struct;
 
-int iio_chrdev_buffer_open(struct iio_dev *indio_dev);
-void iio_chrdev_buffer_release(struct iio_dev *indio_dev);
-
 unsigned int iio_buffer_poll(struct file *filp,
 			     struct poll_table_struct *wait);
 ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
@@ -47,14 +44,6 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
 
 #else
 
-static inline int iio_chrdev_buffer_open(struct iio_dev *indio_dev)
-{
-	return -EINVAL;
-}
-
-static inline void iio_chrdev_buffer_release(struct iio_dev *indio_dev)
-{}
-
 #define iio_buffer_poll_addr NULL
 #define iio_buffer_read_first_n_outer_addr NULL
 
diff --git a/drivers/staging/iio/iio_core_trigger.h b/drivers/staging/iio/iio_core_trigger.h
index 523c288b776..6f7c56fcbe7 100644
--- a/drivers/staging/iio/iio_core_trigger.h
+++ b/drivers/staging/iio/iio_core_trigger.h
@@ -13,8 +13,7 @@
  * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
  * @indio_dev: iio_dev associated with the device that will consume the trigger
  **/
-
-int iio_device_register_trigger_consumer(struct iio_dev *indio_dev);
+void iio_device_register_trigger_consumer(struct iio_dev *indio_dev);
 
 /**
  * iio_device_unregister_trigger_consumer() - reverse the registration process
diff --git a/drivers/staging/iio/iio_dummy_evgen.c b/drivers/staging/iio/iio_dummy_evgen.c
index da657d10471..cdbf289bfe2 100644
--- a/drivers/staging/iio/iio_dummy_evgen.c
+++ b/drivers/staging/iio/iio_dummy_evgen.c
@@ -102,6 +102,10 @@ static int iio_dummy_evgen_create(void)
 int iio_dummy_evgen_get_irq(void)
 {
 	int i, ret = 0;
+
+	if (iio_evgen == NULL)
+		return -ENODEV;
+
 	mutex_lock(&iio_evgen->lock);
 	for (i = 0; i < IIO_EVENTGEN_NO; i++)
 		if (iio_evgen->inuse[i] == false) {
diff --git a/drivers/staging/iio/iio_simple_dummy.c b/drivers/staging/iio/iio_simple_dummy.c
index af0c99236d4..e3a94572bb4 100644
--- a/drivers/staging/iio/iio_simple_dummy.c
+++ b/drivers/staging/iio/iio_simple_dummy.c
@@ -21,7 +21,8 @@
 
 #include "iio.h"
 #include "sysfs.h"
-#include "buffer_generic.h"
+#include "events.h"
+#include "buffer.h"
 #include "iio_simple_dummy.h"
 
 /*
@@ -76,13 +77,13 @@ static struct iio_chan_spec iio_dummy_channels[] = {
 		 * Offset for userspace to apply prior to scale
 		 * when converting to standard units (microvolts)
 		 */
-		(1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
+		IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
 		/*
 		 * in_voltage0_scale
 		 * Multipler for userspace to apply post offset
 		 * when converting to standard units (microvolts)
 		 */
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		/* The ordering of elements in the buffer via an enum */
 		.scan_index = voltage0,
 		.scan_type = { /* Description of storage in buffer */
@@ -117,7 +118,7 @@ static struct iio_chan_spec iio_dummy_channels[] = {
 		 * Shared version of scale - shared by differential
 		 * input channels of type IIO_VOLTAGE.
 		 */
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.scan_index = diffvoltage1m2,
 		.scan_type = { /* Description of storage in buffer */
 			.sign = 's', /* signed */
@@ -134,7 +135,7 @@ static struct iio_chan_spec iio_dummy_channels[] = {
 		.channel = 3,
 		.channel2 = 4,
 		.info_mask =
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.scan_index = diffvoltage3m4,
 		.scan_type = {
 			.sign = 's',
@@ -159,7 +160,7 @@ static struct iio_chan_spec iio_dummy_channels[] = {
 		 * seeing the readings. Typically part of hardware
 		 * calibration.
 		 */
-		(1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE),
+		IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
 		.scan_index = accelx,
 		.scan_type = { /* Description of storage in buffer */
 			.sign = 's', /* signed */
@@ -228,29 +229,32 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
 			break;
 		}
 		break;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		/* only single ended adc -> 7 */
 		*val = 7;
 		ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
-		/* only single ended adc -> 0.001333 */
-		*val = 0;
-		*val2 = 1333;
-		ret = IIO_VAL_INT_PLUS_MICRO;
-		break;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
-		/* all differential adc channels -> 0.000001344 */
-		*val = 0;
-		*val2 = 1344;
-		ret = IIO_VAL_INT_PLUS_NANO;
+	case IIO_CHAN_INFO_SCALE:
+		switch (chan->differential) {
+		case 0:
+			/* only single ended adc -> 0.001333 */
+			*val = 0;
+			*val2 = 1333;
+			ret = IIO_VAL_INT_PLUS_MICRO;
+			break;
+		case 1:
+			/* all differential adc channels -> 0.000001344 */
+			*val = 0;
+			*val2 = 1344;
+			ret = IIO_VAL_INT_PLUS_NANO;
+		}
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		/* only the acceleration axis - read from cache */
 		*val = st->accel_calibbias;
 		ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		*val = st->accel_calibscale->val;
 		*val2 = st->accel_calibscale->val2;
 		ret = IIO_VAL_INT_PLUS_MICRO;
@@ -295,7 +299,7 @@ static int iio_dummy_write_raw(struct iio_dev *indio_dev,
 		st->dac_val = val;
 		mutex_unlock(&st->lock);
 		return 0;
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		mutex_lock(&st->lock);
 		/* Compare against table - hard matching here */
 		for (i = 0; i < ARRAY_SIZE(dummy_scales); i++)
@@ -514,7 +518,8 @@ static __init int iio_dummy_init(void)
 		return -EINVAL;
 	}
 	/* Fake a bus */
-	iio_dummy_devs = kzalloc(sizeof(*iio_dummy_devs)*instances, GFP_KERNEL);
+	iio_dummy_devs = kcalloc(instances, sizeof(*iio_dummy_devs),
+				 GFP_KERNEL);
 	/* Here we have no actual device so call probe */
 	for (i = 0; i < instances; i++) {
 		ret = iio_dummy_probe(i);
diff --git a/drivers/staging/iio/iio_simple_dummy_buffer.c b/drivers/staging/iio/iio_simple_dummy_buffer.c
index edad0e7b4f4..d6a1c0e82a5 100644
--- a/drivers/staging/iio/iio_simple_dummy_buffer.c
+++ b/drivers/staging/iio/iio_simple_dummy_buffer.c
@@ -57,7 +57,7 @@ static irqreturn_t iio_simple_dummy_trigger_h(int irq, void *p)
 	if (data == NULL)
 		return -ENOMEM;
 
-	if (buffer->scan_count) {
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)) {
 		/*
 		 * Three common options here:
 		 * hardware scans: certain combinations of channels make
@@ -75,7 +75,10 @@ static irqreturn_t iio_simple_dummy_trigger_h(int irq, void *p)
 		 * in the constant table fakedata.
 		 */
 		int i, j;
-		for (i = 0, j = 0; i < buffer->scan_count; i++) {
+		for (i = 0, j = 0;
+		     i < bitmap_weight(indio_dev->active_scan_mask,
+				       indio_dev->masklength);
+		     i++) {
 			j = find_next_bit(buffer->scan_mask,
 					  indio_dev->masklength, j + 1);
 			/* random access read form the 'device' */
@@ -142,8 +145,6 @@ int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
 	/* Tell the core how to access the buffer */
 	buffer->access = &kfifo_access_funcs;
 
-	/* Number of bytes per element */
-	buffer->bpe = 2;
 	/* Enable timestamps by default */
 	buffer->scan_timestamp = true;
 
@@ -151,8 +152,7 @@ int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
 	 * Tell the core what device type specific functions should
 	 * be run on either side of buffer capture enable / disable.
 	 */
-	buffer->setup_ops = &iio_simple_dummy_buffer_setup_ops;
-	buffer->owner = THIS_MODULE;
+	indio_dev->setup_ops = &iio_simple_dummy_buffer_setup_ops;
 
 	/*
 	 * Configure a polling function.
diff --git a/drivers/staging/iio/iio_simple_dummy_events.c b/drivers/staging/iio/iio_simple_dummy_events.c
index 9f00cff7ddd..449c7a5ece8 100644
--- a/drivers/staging/iio/iio_simple_dummy_events.c
+++ b/drivers/staging/iio/iio_simple_dummy_events.c
@@ -14,6 +14,7 @@
 
 #include "iio.h"
 #include "sysfs.h"
+#include "events.h"
 #include "iio_simple_dummy.h"
 
 /* Evgen 'fakes' interrupt events for this example */
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index 454d131455d..9a2ca55625f 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -21,7 +21,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "../ring_sw.h"
 
 #include "ad5933.h"
@@ -113,10 +113,10 @@ static struct iio_chan_spec ad5933_channels[] = {
 		 0, AD5933_REG_TEMP_DATA, IIO_ST('s', 14, 16, 0), 0),
 	/* Ring Channels */
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "real_raw", 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 AD5933_REG_REAL_DATA, 0, IIO_ST('s', 16, 16, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "imag_raw", 0, 0,
-		 (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		 IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		 AD5933_REG_IMAG_DATA, 1, IIO_ST('s', 16, 16, 0), 0),
 };
 
@@ -329,7 +329,7 @@ static ssize_t ad5933_show(struct device *dev,
 	int ret = 0, len = 0;
 
 	mutex_lock(&indio_dev->mlock);
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD5933_OUT_RANGE:
 		len = sprintf(buf, "%d\n",
 			      st->range_avail[(st->ctrl_hb >> 1) & 0x3]);
@@ -380,7 +380,7 @@ static ssize_t ad5933_store(struct device *dev,
 	}
 
 	mutex_lock(&indio_dev->mlock);
-	switch (this_attr->address) {
+	switch ((u32) this_attr->address) {
 	case AD5933_OUT_RANGE:
 		for (i = 0; i < 4; i++)
 			if (val == st->range_avail[i]) {
@@ -537,14 +537,14 @@ static const struct iio_info ad5933_info = {
 static int ad5933_ring_preenable(struct iio_dev *indio_dev)
 {
 	struct ad5933_state *st = iio_priv(indio_dev);
-	struct iio_buffer *ring = indio_dev->buffer;
 	size_t d_size;
 	int ret;
 
-	if (!ring->scan_count)
+	if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		return -EINVAL;
 
-	d_size = ring->scan_count *
+	d_size = bitmap_weight(indio_dev->active_scan_mask,
+			       indio_dev->masklength) *
 		 ad5933_channels[1].scan_type.storagebits / 8;
 
 	if (indio_dev->buffer->access->set_bytes_per_datum)
@@ -611,7 +611,7 @@ static int ad5933_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 	indio_dev->buffer->access = &ring_sw_access_funcs;
 
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->buffer->setup_ops = &ad5933_ring_setup_ops;
+	indio_dev->setup_ops = &ad5933_ring_setup_ops;
 
 	indio_dev->modes |= INDIO_BUFFER_HARDWARE;
 
@@ -640,12 +640,14 @@ static void ad5933_work(struct work_struct *work)
 	ad5933_i2c_read(st->client, AD5933_REG_STATUS, 1, &status);
 
 	if (status & AD5933_STAT_DATA_VALID) {
+		int scan_count = bitmap_weight(indio_dev->active_scan_mask,
+					       indio_dev->masklength);
 		ad5933_i2c_read(st->client,
-				test_bit(1, ring->scan_mask) ?
+				test_bit(1, indio_dev->active_scan_mask) ?
 				AD5933_REG_REAL_DATA : AD5933_REG_IMAG_DATA,
-				ring->scan_count * 2, (u8 *)buf);
+				scan_count * 2, (u8 *)buf);
 
-		if (ring->scan_count == 2) {
+		if (scan_count == 2) {
 			buf[0] = be16_to_cpu(buf[0]);
 			buf[1] = be16_to_cpu(buf[1]);
 		} else {
@@ -734,8 +736,8 @@ static int __devinit ad5933_probe(struct i2c_client *client,
 		goto error_unreg_ring;
 
 	/* enable both REAL and IMAG channels by default */
-	iio_scan_mask_set(indio_dev->buffer, 0);
-	iio_scan_mask_set(indio_dev->buffer, 1);
+	iio_scan_mask_set(indio_dev, indio_dev->buffer, 0);
+	iio_scan_mask_set(indio_dev, indio_dev->buffer, 1);
 
 	ret = ad5933_setup(st);
 	if (ret)
diff --git a/drivers/staging/iio/imu/adis16400.h b/drivers/staging/iio/imu/adis16400.h
index f3546ee910a..83d133efaac 100644
--- a/drivers/staging/iio/imu/adis16400.h
+++ b/drivers/staging/iio/imu/adis16400.h
@@ -148,12 +148,14 @@ struct adis16400_chip_info {
  * @tx:			transmit buffer
  * @rx:			receive buffer
  * @buf_lock:		mutex to protect tx and rx
+ * @filt_int:		integer part of requested filter frequency
  **/
 struct adis16400_state {
 	struct spi_device		*us;
 	struct iio_trigger		*trig;
 	struct mutex			buf_lock;
 	struct adis16400_chip_info	*variant;
+	int				filt_int;
 
 	u8	tx[ADIS16400_MAX_TX] ____cacheline_aligned;
 	u8	rx[ADIS16400_MAX_RX] ____cacheline_aligned;
diff --git a/drivers/staging/iio/imu/adis16400_core.c b/drivers/staging/iio/imu/adis16400_core.c
index efc0f652900..e73ad7818d8 100644
--- a/drivers/staging/iio/imu/adis16400_core.c
+++ b/drivers/staging/iio/imu/adis16400_core.c
@@ -28,7 +28,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "adis16400.h"
 
 enum adis16400_chip_variant {
@@ -161,25 +161,65 @@ error_ret:
 	return ret;
 }
 
+static int adis16400_get_freq(struct iio_dev *indio_dev)
+{
+	u16 t;
+	int sps, ret;
+
+	ret = adis16400_spi_read_reg_16(indio_dev, ADIS16400_SMPL_PRD, &t);
+	if (ret < 0)
+		return ret;
+	sps =  (t & ADIS16400_SMPL_PRD_TIME_BASE) ? 53 : 1638;
+	sps /= (t & ADIS16400_SMPL_PRD_DIV_MASK) + 1;
+
+	return sps;
+}
+
 static ssize_t adis16400_read_frequency(struct device *dev,
 		struct device_attribute *attr,
 		char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	int ret, len = 0;
-	u16 t;
-	int sps;
-	ret = adis16400_spi_read_reg_16(indio_dev,
-			ADIS16400_SMPL_PRD,
-			&t);
-	if (ret)
+	ret = adis16400_get_freq(indio_dev);
+	if (ret < 0)
 		return ret;
-	sps =  (t & ADIS16400_SMPL_PRD_TIME_BASE) ? 53 : 1638;
-	sps /= (t & ADIS16400_SMPL_PRD_DIV_MASK) + 1;
-	len = sprintf(buf, "%d SPS\n", sps);
+	len = sprintf(buf, "%d SPS\n", ret);
 	return len;
 }
 
+static const unsigned adis16400_3db_divisors[] = {
+	[0] = 2, /* Special case */
+	[1] = 5,
+	[2] = 10,
+	[3] = 50,
+	[4] = 200,
+};
+
+static int adis16400_set_filter(struct iio_dev *indio_dev, int sps, int val)
+{
+	int i, ret;
+	u16 val16;
+	for (i = ARRAY_SIZE(adis16400_3db_divisors) - 1; i >= 0; i--)
+		if (sps/adis16400_3db_divisors[i] > val)
+			break;
+	if (i == -1)
+		ret = -EINVAL;
+	else {
+		ret = adis16400_spi_read_reg_16(indio_dev,
+						ADIS16400_SENS_AVG,
+						&val16);
+		if (ret < 0)
+			goto error_ret;
+
+		ret = adis16400_spi_write_reg_16(indio_dev,
+						 ADIS16400_SENS_AVG,
+						 (val16 & ~0x03) | i);
+	}
+error_ret:
+	return ret;
+}
+
 static ssize_t adis16400_write_frequency(struct device *dev,
 		struct device_attribute *attr,
 		const char *buf,
@@ -210,6 +250,7 @@ static ssize_t adis16400_write_frequency(struct device *dev,
 			ADIS16400_SMPL_PRD,
 			t);
 
+	/* Also update the filter */
 	mutex_unlock(&indio_dev->mlock);
 
 	return ret ? ret : len;
@@ -455,22 +496,39 @@ static u8 adis16400_addresses[17][2] = {
 	[incli_y] = { ADIS16300_ROLL_OUT }
 };
 
+
 static int adis16400_write_raw(struct iio_dev *indio_dev,
 			       struct iio_chan_spec const *chan,
 			       int val,
 			       int val2,
 			       long mask)
 {
-	int ret;
+	struct adis16400_state *st = iio_priv(indio_dev);
+	int ret, sps;
 
 	switch (mask) {
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		mutex_lock(&indio_dev->mlock);
 		ret = adis16400_spi_write_reg_16(indio_dev,
 				adis16400_addresses[chan->address][1],
 				val);
 		mutex_unlock(&indio_dev->mlock);
 		return ret;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		/* Need to cache values so we can update if the frequency
+		   changes */
+		mutex_lock(&indio_dev->mlock);
+		st->filt_int = val;
+		/* Work out update to current value */
+		sps = adis16400_get_freq(indio_dev);
+		if (sps < 0) {
+			mutex_unlock(&indio_dev->mlock);
+			return sps;
+		}
+
+		ret = adis16400_set_filter(indio_dev, sps, val);
+		mutex_unlock(&indio_dev->mlock);
+		return ret;
 	default:
 		return -EINVAL;
 	}
@@ -504,8 +562,7 @@ static int adis16400_read_raw(struct iio_dev *indio_dev,
 		*val = val16;
 		mutex_unlock(&indio_dev->mlock);
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_ANGL_VEL:
 			*val = 0;
@@ -533,7 +590,7 @@ static int adis16400_read_raw(struct iio_dev *indio_dev,
 		default:
 			return -EINVAL;
 		}
-	case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE):
+	case IIO_CHAN_INFO_CALIBBIAS:
 		mutex_lock(&indio_dev->mlock);
 		ret = adis16400_spi_read_reg_16(indio_dev,
 				adis16400_addresses[chan->address][1],
@@ -544,11 +601,29 @@ static int adis16400_read_raw(struct iio_dev *indio_dev,
 		val16 = ((val16 & 0xFFF) << 4) >> 4;
 		*val = val16;
 		return IIO_VAL_INT;
-	case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE):
+	case IIO_CHAN_INFO_OFFSET:
 		/* currently only temperature */
 		*val = 198;
 		*val2 = 160000;
 		return IIO_VAL_INT_PLUS_MICRO;
+	case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+		mutex_lock(&indio_dev->mlock);
+		/* Need both the number of taps and the sampling frequency */
+		ret = adis16400_spi_read_reg_16(indio_dev,
+						ADIS16400_SENS_AVG,
+						&val16);
+		if (ret < 0) {
+			mutex_unlock(&indio_dev->mlock);
+			return ret;
+		}
+		ret = adis16400_get_freq(indio_dev);
+		if (ret > 0)
+			*val = ret/adis16400_3db_divisors[val16 & 0x03];
+		*val2 = 0;
+		mutex_unlock(&indio_dev->mlock);
+		if (ret < 0)
+			return ret;
+		return IIO_VAL_INT_PLUS_MICRO;
 	default:
 		return -EINVAL;
 	}
@@ -560,7 +635,7 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.indexed = 1,
 		.channel = 0,
 		.extend_name = "supply",
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_supply,
 		.scan_index = ADIS16400_SCAN_SUPPLY,
 		.scan_type = IIO_ST('u', 14, 16, 0)
@@ -568,8 +643,9 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_x,
 		.scan_index = ADIS16400_SCAN_GYRO_X,
 		.scan_type = IIO_ST('s', 14, 16, 0)
@@ -577,8 +653,9 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_y,
 		.scan_index = ADIS16400_SCAN_GYRO_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -586,8 +663,9 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_z,
 		.scan_index = ADIS16400_SCAN_GYRO_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -595,8 +673,9 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_x,
 		.scan_index = ADIS16400_SCAN_ACC_X,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -604,8 +683,9 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_y,
 		.scan_index = ADIS16400_SCAN_ACC_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -613,8 +693,9 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_z,
 		.scan_index = ADIS16400_SCAN_ACC_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -622,7 +703,8 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_MAGN,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = magn_x,
 		.scan_index = ADIS16400_SCAN_MAGN_X,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -630,7 +712,8 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_MAGN,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = magn_y,
 		.scan_index = ADIS16400_SCAN_MAGN_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -638,7 +721,8 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_MAGN,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = magn_z,
 		.scan_index = ADIS16400_SCAN_MAGN_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -646,8 +730,8 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_TEMP,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = temp,
 		.scan_index = ADIS16400_SCAN_TEMP,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -655,7 +739,7 @@ static struct iio_chan_spec adis16400_channels[] = {
 		.type = IIO_VOLTAGE,
 		.indexed = 1,
 		.channel = 1,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in1,
 		.scan_index = ADIS16400_SCAN_ADC_0,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -669,7 +753,7 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.indexed = 1,
 		.channel = 0,
 		.extend_name = "supply",
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_supply,
 		.scan_index = ADIS16400_SCAN_SUPPLY,
 		.scan_type = IIO_ST('u', 12, 16, 0)
@@ -677,8 +761,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_x,
 		.scan_index = ADIS16400_SCAN_GYRO_X,
 		.scan_type = IIO_ST('s', 14, 16, 0)
@@ -686,8 +771,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_y,
 		.scan_index = ADIS16400_SCAN_GYRO_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -695,8 +781,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_z,
 		.scan_index = ADIS16400_SCAN_GYRO_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -704,8 +791,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 	.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_x,
 		.scan_index = ADIS16400_SCAN_ACC_X,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -713,8 +801,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_y,
 		.scan_index = ADIS16400_SCAN_ACC_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -722,8 +811,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_z,
 		.scan_index = ADIS16400_SCAN_ACC_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -732,8 +822,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.indexed = 1,
 		.channel = 0,
 		.extend_name = "x",
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = temp0,
 		.scan_index = ADIS16350_SCAN_TEMP_X,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -742,8 +833,9 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.indexed = 1,
 		.channel = 1,
 		.extend_name = "y",
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = temp1,
 		.scan_index = ADIS16350_SCAN_TEMP_Y,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -752,8 +844,8 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.indexed = 1,
 		.channel = 2,
 		.extend_name = "z",
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = temp2,
 		.scan_index = ADIS16350_SCAN_TEMP_Z,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -761,7 +853,7 @@ static struct iio_chan_spec adis16350_channels[] = {
 		.type = IIO_VOLTAGE,
 		.indexed = 1,
 		.channel = 1,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in1,
 		.scan_index = ADIS16350_SCAN_ADC_0,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -775,7 +867,7 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.indexed = 1,
 		.channel = 0,
 		.extend_name = "supply",
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in_supply,
 		.scan_index = ADIS16400_SCAN_SUPPLY,
 		.scan_type = IIO_ST('u', 12, 16, 0)
@@ -783,8 +875,9 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_x,
 		.scan_index = ADIS16400_SCAN_GYRO_X,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -792,8 +885,9 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_x,
 		.scan_index = ADIS16400_SCAN_ACC_X,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -801,8 +895,9 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_y,
 		.scan_index = ADIS16400_SCAN_ACC_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -810,8 +905,9 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_z,
 		.scan_index = ADIS16400_SCAN_ACC_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -819,8 +915,8 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_TEMP,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_OFFSET_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_OFFSET_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = temp,
 		.scan_index = ADIS16400_SCAN_TEMP,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -828,7 +924,7 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_VOLTAGE,
 		.indexed = 1,
 		.channel = 1,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
 		.address = in1,
 		.scan_index = ADIS16350_SCAN_ADC_0,
 		.scan_type = IIO_ST('s', 12, 16, 0),
@@ -836,7 +932,7 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_INCLI,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = incli_x,
 		.scan_index = ADIS16300_SCAN_INCLI_X,
 		.scan_type = IIO_ST('s', 13, 16, 0),
@@ -844,7 +940,7 @@ static struct iio_chan_spec adis16300_channels[] = {
 		.type = IIO_INCLI,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = incli_y,
 		.scan_index = ADIS16300_SCAN_INCLI_Y,
 		.scan_type = IIO_ST('s', 13, 16, 0),
@@ -857,8 +953,9 @@ static const struct iio_chan_spec adis16334_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_x,
 		.scan_index = ADIS16400_SCAN_GYRO_X,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -866,8 +963,9 @@ static const struct iio_chan_spec adis16334_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_y,
 		.scan_index = ADIS16400_SCAN_GYRO_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -875,8 +973,9 @@ static const struct iio_chan_spec adis16334_channels[] = {
 		.type = IIO_ANGL_VEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = gyro_z,
 		.scan_index = ADIS16400_SCAN_GYRO_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -884,8 +983,9 @@ static const struct iio_chan_spec adis16334_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_X,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_x,
 		.scan_index = ADIS16400_SCAN_ACC_X,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -893,8 +993,9 @@ static const struct iio_chan_spec adis16334_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Y,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_y,
 		.scan_index = ADIS16400_SCAN_ACC_Y,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -902,8 +1003,9 @@ static const struct iio_chan_spec adis16334_channels[] = {
 		.type = IIO_ACCEL,
 		.modified = 1,
 		.channel2 = IIO_MOD_Z,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT |
+		IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY_SHARED_BIT,
 		.address = accel_z,
 		.scan_index = ADIS16400_SCAN_ACC_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -911,8 +1013,8 @@ static const struct iio_chan_spec adis16334_channels[] = {
 		.type = IIO_TEMP,
 		.indexed = 1,
 		.channel = 0,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE) |
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		.info_mask = IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT |
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		.address = accel_z,
 		.scan_index = ADIS16400_SCAN_ACC_Z,
 		.scan_type = IIO_ST('s', 14, 16, 0),
@@ -1118,6 +1220,7 @@ static const struct spi_device_id adis16400_id[] = {
 	{"adis16405", ADIS16400},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, adis16400_id);
 
 static struct spi_driver adis16400_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/imu/adis16400_ring.c b/drivers/staging/iio/imu/adis16400_ring.c
index fd886bf51a6..ac22de573f3 100644
--- a/drivers/staging/iio/imu/adis16400_ring.c
+++ b/drivers/staging/iio/imu/adis16400_ring.c
@@ -79,14 +79,16 @@ static int adis16350_spi_read_all(struct device *dev, u8 *rx)
 	struct spi_message msg;
 	int i, j = 0, ret;
 	struct spi_transfer *xfers;
+	int scan_count = bitmap_weight(indio_dev->active_scan_mask,
+				       indio_dev->masklength);
 
-	xfers = kzalloc(sizeof(*xfers)*indio_dev->buffer->scan_count + 1,
+	xfers = kzalloc(sizeof(*xfers)*(scan_count + 1),
 			GFP_KERNEL);
 	if (xfers == NULL)
 		return -ENOMEM;
 
 	for (i = 0; i < ARRAY_SIZE(read_all_tx_array); i++)
-		if (test_bit(i, indio_dev->buffer->scan_mask)) {
+		if (test_bit(i, indio_dev->active_scan_mask)) {
 			xfers[j].tx_buf = &read_all_tx_array[i];
 			xfers[j].bits_per_word = 16;
 			xfers[j].len = 2;
@@ -97,7 +99,7 @@ static int adis16350_spi_read_all(struct device *dev, u8 *rx)
 	xfers[j].len = 2;
 
 	spi_message_init(&msg);
-	for (j = 0; j < indio_dev->buffer->scan_count + 1; j++)
+	for (j = 0; j < scan_count + 1; j++)
 		spi_message_add_tail(&xfers[j], &msg);
 
 	ret = spi_sync(st->us, &msg);
@@ -119,26 +121,27 @@ static irqreturn_t adis16400_trigger_handler(int irq, void *p)
 	s16 *data;
 	size_t datasize = ring->access->get_bytes_per_datum(ring);
 	/* Asumption that long is enough for maximum channels */
-	unsigned long mask = *ring->scan_mask;
-
+	unsigned long mask = *indio_dev->active_scan_mask;
+	int scan_count = bitmap_weight(indio_dev->active_scan_mask,
+				       indio_dev->masklength);
 	data = kmalloc(datasize , GFP_KERNEL);
 	if (data == NULL) {
 		dev_err(&st->us->dev, "memory alloc failed in ring bh");
 		return -ENOMEM;
 	}
 
-	if (ring->scan_count) {
+	if (scan_count) {
 		if (st->variant->flags & ADIS16400_NO_BURST) {
 			ret = adis16350_spi_read_all(&indio_dev->dev, st->rx);
 			if (ret < 0)
 				goto err;
-			for (; i < ring->scan_count; i++)
+			for (; i < scan_count; i++)
 				data[i]	= *(s16 *)(st->rx + i*2);
 		} else {
 			ret = adis16400_spi_read_burst(&indio_dev->dev, st->rx);
 			if (ret < 0)
 				goto err;
-			for (; i < indio_dev->buffer->scan_count; i++) {
+			for (; i < scan_count; i++) {
 				j = __ffs(mask);
 				mask &= ~(1 << j);
 				data[i] = be16_to_cpup(
@@ -186,10 +189,8 @@ int adis16400_configure_ring(struct iio_dev *indio_dev)
 	indio_dev->buffer = ring;
 	/* Effectively select the ring buffer implementation */
 	ring->access = &ring_sw_access_funcs;
-	ring->bpe = 2;
 	ring->scan_timestamp = true;
-	ring->setup_ops = &adis16400_ring_setup_ops;
-	ring->owner = THIS_MODULE;
+	indio_dev->setup_ops = &adis16400_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &adis16400_trigger_handler,
diff --git a/drivers/staging/iio/industrialio-buffer.c b/drivers/staging/iio/industrialio-buffer.c
index 9df0ce81dad..d7b1e9e435a 100644
--- a/drivers/staging/iio/industrialio-buffer.c
+++ b/drivers/staging/iio/industrialio-buffer.c
@@ -24,7 +24,7 @@
 #include "iio.h"
 #include "iio_core.h"
 #include "sysfs.h"
-#include "buffer_generic.h"
+#include "buffer.h"
 
 static const char * const iio_endian_prefix[] = {
 	[IIO_BE] = "be",
@@ -43,7 +43,7 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
 	struct iio_dev *indio_dev = filp->private_data;
 	struct iio_buffer *rb = indio_dev->buffer;
 
-	if (!rb->access->read_first_n)
+	if (!rb || !rb->access->read_first_n)
 		return -EINVAL;
 	return rb->access->read_first_n(rb, n, buf);
 }
@@ -64,28 +64,9 @@ unsigned int iio_buffer_poll(struct file *filp,
 	return 0;
 }
 
-int iio_chrdev_buffer_open(struct iio_dev *indio_dev)
+void iio_buffer_init(struct iio_buffer *buffer)
 {
-	struct iio_buffer *rb = indio_dev->buffer;
-	if (!rb)
-		return -EINVAL;
-	if (rb->access->mark_in_use)
-		rb->access->mark_in_use(rb);
-	return 0;
-}
-
-void iio_chrdev_buffer_release(struct iio_dev *indio_dev)
-{
-	struct iio_buffer *rb = indio_dev->buffer;
-
-	clear_bit(IIO_BUSY_BIT_POS, &rb->flags);
-	if (rb->access->unmark_in_use)
-		rb->access->unmark_in_use(rb);
-}
-
-void iio_buffer_init(struct iio_buffer *buffer, struct iio_dev *indio_dev)
-{
-	buffer->indio_dev = indio_dev;
+	INIT_LIST_HEAD(&buffer->demux_list);
 	init_waitqueue_head(&buffer->pollq);
 }
 EXPORT_SYMBOL(iio_buffer_init);
@@ -126,17 +107,15 @@ static ssize_t iio_scan_el_show(struct device *dev,
 	int ret;
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 
-	ret = iio_scan_mask_query(indio_dev->buffer,
-				  to_iio_dev_attr(attr)->address);
-	if (ret < 0)
-		return ret;
+	ret = test_bit(to_iio_dev_attr(attr)->address,
+		       indio_dev->buffer->scan_mask);
+
 	return sprintf(buf, "%d\n", ret);
 }
 
 static int iio_scan_mask_clear(struct iio_buffer *buffer, int bit)
 {
 	clear_bit(bit, buffer->scan_mask);
-	buffer->scan_count--;
 	return 0;
 }
 
@@ -153,11 +132,11 @@ static ssize_t iio_scan_el_store(struct device *dev,
 
 	state = !(buf[0] == '0');
 	mutex_lock(&indio_dev->mlock);
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
+	if (iio_buffer_enabled(indio_dev)) {
 		ret = -EBUSY;
 		goto error_ret;
 	}
-	ret = iio_scan_mask_query(buffer, this_attr->address);
+	ret = iio_scan_mask_query(indio_dev, buffer, this_attr->address);
 	if (ret < 0)
 		goto error_ret;
 	if (!state && ret) {
@@ -165,7 +144,7 @@ static ssize_t iio_scan_el_store(struct device *dev,
 		if (ret)
 			goto error_ret;
 	} else if (state && !ret) {
-		ret = iio_scan_mask_set(buffer, this_attr->address);
+		ret = iio_scan_mask_set(indio_dev, buffer, this_attr->address);
 		if (ret)
 			goto error_ret;
 	}
@@ -173,7 +152,7 @@ static ssize_t iio_scan_el_store(struct device *dev,
 error_ret:
 	mutex_unlock(&indio_dev->mlock);
 
-	return ret ? ret : len;
+	return ret < 0 ? ret : len;
 
 }
 
@@ -196,7 +175,7 @@ static ssize_t iio_scan_el_ts_store(struct device *dev,
 
 	state = !(buf[0] == '0');
 	mutex_lock(&indio_dev->mlock);
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
+	if (iio_buffer_enabled(indio_dev)) {
 		ret = -EBUSY;
 		goto error_ret;
 	}
@@ -311,12 +290,14 @@ int iio_buffer_register(struct iio_dev *indio_dev,
 			if (ret < 0)
 				goto error_cleanup_dynamic;
 			attrcount += ret;
+			if (channels[i].type == IIO_TIMESTAMP)
+				buffer->scan_index_timestamp =
+					channels[i].scan_index;
 		}
 		if (indio_dev->masklength && buffer->scan_mask == NULL) {
-			buffer->scan_mask
-				= kzalloc(sizeof(*buffer->scan_mask)*
-					  BITS_TO_LONGS(indio_dev->masklength),
-					  GFP_KERNEL);
+			buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
+						    sizeof(*buffer->scan_mask),
+						    GFP_KERNEL);
 			if (buffer->scan_mask == NULL) {
 				ret = -ENOMEM;
 				goto error_cleanup_dynamic;
@@ -326,10 +307,9 @@ int iio_buffer_register(struct iio_dev *indio_dev,
 
 	buffer->scan_el_group.name = iio_scan_elements_group_name;
 
-	buffer->scan_el_group.attrs
-		= kzalloc(sizeof(buffer->scan_el_group.attrs[0])*
-			  (attrcount + 1),
-			  GFP_KERNEL);
+	buffer->scan_el_group.attrs = kcalloc(attrcount + 1,
+					      sizeof(buffer->scan_el_group.attrs[0]),
+					      GFP_KERNEL);
 	if (buffer->scan_el_group.attrs == NULL) {
 		ret = -ENOMEM;
 		goto error_free_scan_mask;
@@ -395,31 +375,20 @@ ssize_t iio_buffer_write_length(struct device *dev,
 		if (val == buffer->access->get_length(buffer))
 			return len;
 
-	if (buffer->access->set_length) {
-		buffer->access->set_length(buffer, val);
-		if (buffer->access->mark_param_change)
-			buffer->access->mark_param_change(buffer);
+	mutex_lock(&indio_dev->mlock);
+	if (iio_buffer_enabled(indio_dev)) {
+		ret = -EBUSY;
+	} else {
+		if (buffer->access->set_length)
+			buffer->access->set_length(buffer, val);
+		ret = 0;
 	}
+	mutex_unlock(&indio_dev->mlock);
 
-	return len;
+	return ret ? ret : len;
 }
 EXPORT_SYMBOL(iio_buffer_write_length);
 
-ssize_t iio_buffer_read_bytes_per_datum(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	struct iio_buffer *buffer = indio_dev->buffer;
-
-	if (buffer->access->get_bytes_per_datum)
-		return sprintf(buf, "%d\n",
-			       buffer->access->get_bytes_per_datum(buffer));
-
-	return 0;
-}
-EXPORT_SYMBOL(iio_buffer_read_bytes_per_datum);
-
 ssize_t iio_buffer_store_enable(struct device *dev,
 				struct device_attribute *attr,
 				const char *buf,
@@ -434,14 +403,14 @@ ssize_t iio_buffer_store_enable(struct device *dev,
 	mutex_lock(&indio_dev->mlock);
 	previous_mode = indio_dev->currentmode;
 	requested_state = !(buf[0] == '0');
-	current_state = !!(previous_mode & INDIO_ALL_BUFFER_MODES);
+	current_state = iio_buffer_enabled(indio_dev);
 	if (current_state == requested_state) {
 		printk(KERN_INFO "iio-buffer, current state requested again\n");
 		goto done;
 	}
 	if (requested_state) {
-		if (buffer->setup_ops->preenable) {
-			ret = buffer->setup_ops->preenable(indio_dev);
+		if (indio_dev->setup_ops->preenable) {
+			ret = indio_dev->setup_ops->preenable(indio_dev);
 			if (ret) {
 				printk(KERN_ERR
 				       "Buffer not started:"
@@ -458,16 +427,12 @@ ssize_t iio_buffer_store_enable(struct device *dev,
 				goto error_ret;
 			}
 		}
-		if (buffer->access->mark_in_use)
-			buffer->access->mark_in_use(buffer);
 		/* Definitely possible for devices to support both of these.*/
 		if (indio_dev->modes & INDIO_BUFFER_TRIGGERED) {
 			if (!indio_dev->trig) {
 				printk(KERN_INFO
 				       "Buffer not started: no trigger\n");
 				ret = -EINVAL;
-				if (buffer->access->unmark_in_use)
-					buffer->access->unmark_in_use(buffer);
 				goto error_ret;
 			}
 			indio_dev->currentmode = INDIO_BUFFER_TRIGGERED;
@@ -478,32 +443,28 @@ ssize_t iio_buffer_store_enable(struct device *dev,
 			goto error_ret;
 		}
 
-		if (buffer->setup_ops->postenable) {
-			ret = buffer->setup_ops->postenable(indio_dev);
+		if (indio_dev->setup_ops->postenable) {
+			ret = indio_dev->setup_ops->postenable(indio_dev);
 			if (ret) {
 				printk(KERN_INFO
 				       "Buffer not started:"
 				       "postenable failed\n");
-				if (buffer->access->unmark_in_use)
-					buffer->access->unmark_in_use(buffer);
 				indio_dev->currentmode = previous_mode;
-				if (buffer->setup_ops->postdisable)
-					buffer->setup_ops->
+				if (indio_dev->setup_ops->postdisable)
+					indio_dev->setup_ops->
 						postdisable(indio_dev);
 				goto error_ret;
 			}
 		}
 	} else {
-		if (buffer->setup_ops->predisable) {
-			ret = buffer->setup_ops->predisable(indio_dev);
+		if (indio_dev->setup_ops->predisable) {
+			ret = indio_dev->setup_ops->predisable(indio_dev);
 			if (ret)
 				goto error_ret;
 		}
-		if (buffer->access->unmark_in_use)
-			buffer->access->unmark_in_use(buffer);
 		indio_dev->currentmode = INDIO_DIRECT_MODE;
-		if (buffer->setup_ops->postdisable) {
-			ret = buffer->setup_ops->postdisable(indio_dev);
+		if (indio_dev->setup_ops->postdisable) {
+			ret = indio_dev->setup_ops->postdisable(indio_dev);
 			if (ret)
 				goto error_ret;
 		}
@@ -523,37 +484,10 @@ ssize_t iio_buffer_show_enable(struct device *dev,
 			       char *buf)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
-	return sprintf(buf, "%d\n", !!(indio_dev->currentmode
-				       & INDIO_ALL_BUFFER_MODES));
+	return sprintf(buf, "%d\n", iio_buffer_enabled(indio_dev));
 }
 EXPORT_SYMBOL(iio_buffer_show_enable);
 
-int iio_sw_buffer_preenable(struct iio_dev *indio_dev)
-{
-	struct iio_buffer *buffer = indio_dev->buffer;
-	size_t size;
-	dev_dbg(&indio_dev->dev, "%s\n", __func__);
-	/* Check if there are any scan elements enabled, if not fail*/
-	if (!(buffer->scan_count || buffer->scan_timestamp))
-		return -EINVAL;
-	if (buffer->scan_timestamp)
-		if (buffer->scan_count)
-			/* Timestamp (aligned to s64) and data */
-			size = (((buffer->scan_count * buffer->bpe)
-					+ sizeof(s64) - 1)
-				& ~(sizeof(s64) - 1))
-				+ sizeof(s64);
-		else /* Timestamp only  */
-			size = sizeof(s64);
-	else /* Data only */
-		size = buffer->scan_count * buffer->bpe;
-	buffer->access->set_bytes_per_datum(buffer, size);
-
-	return 0;
-}
-EXPORT_SYMBOL(iio_sw_buffer_preenable);
-
-
 /* note NULL used as error indicator as it doesn't make sense. */
 static unsigned long *iio_scan_mask_match(unsigned long *av_masks,
 					  unsigned int masklength,
@@ -569,14 +503,57 @@ static unsigned long *iio_scan_mask_match(unsigned long *av_masks,
 	return NULL;
 }
 
+int iio_sw_buffer_preenable(struct iio_dev *indio_dev)
+{
+	struct iio_buffer *buffer = indio_dev->buffer;
+	const struct iio_chan_spec *ch;
+	unsigned bytes = 0;
+	int length, i;
+	dev_dbg(&indio_dev->dev, "%s\n", __func__);
+
+	/* How much space will the demuxed element take? */
+	for_each_set_bit(i, buffer->scan_mask,
+			 indio_dev->masklength) {
+		ch = iio_find_channel_from_si(indio_dev, i);
+		length = ch->scan_type.storagebits/8;
+		bytes = ALIGN(bytes, length);
+		bytes += length;
+	}
+	if (buffer->scan_timestamp) {
+		ch = iio_find_channel_from_si(indio_dev,
+					      buffer->scan_index_timestamp);
+		length = ch->scan_type.storagebits/8;
+		bytes = ALIGN(bytes, length);
+		bytes += length;
+	}
+	buffer->access->set_bytes_per_datum(buffer, bytes);
+
+	/* What scan mask do we actually have ?*/
+	if (indio_dev->available_scan_masks)
+		indio_dev->active_scan_mask =
+			iio_scan_mask_match(indio_dev->available_scan_masks,
+					    indio_dev->masklength,
+					    buffer->scan_mask);
+	else
+		indio_dev->active_scan_mask = buffer->scan_mask;
+	iio_update_demux(indio_dev);
+
+	if (indio_dev->info->update_scan_mode)
+		return indio_dev->info
+			->update_scan_mode(indio_dev,
+					   indio_dev->active_scan_mask);
+	return 0;
+}
+EXPORT_SYMBOL(iio_sw_buffer_preenable);
+
 /**
  * iio_scan_mask_set() - set particular bit in the scan mask
  * @buffer: the buffer whose scan mask we are interested in
  * @bit: the bit to be set.
  **/
-int iio_scan_mask_set(struct iio_buffer *buffer, int bit)
+int iio_scan_mask_set(struct iio_dev *indio_dev,
+		      struct iio_buffer *buffer, int bit)
 {
-	struct iio_dev *indio_dev = buffer->indio_dev;
 	unsigned long *mask;
 	unsigned long *trialmask;
 
@@ -604,7 +581,6 @@ int iio_scan_mask_set(struct iio_buffer *buffer, int bit)
 		}
 	}
 	bitmap_copy(buffer->scan_mask, trialmask, indio_dev->masklength);
-	buffer->scan_count++;
 
 	kfree(trialmask);
 
@@ -612,25 +588,147 @@ int iio_scan_mask_set(struct iio_buffer *buffer, int bit)
 };
 EXPORT_SYMBOL_GPL(iio_scan_mask_set);
 
-int iio_scan_mask_query(struct iio_buffer *buffer, int bit)
+int iio_scan_mask_query(struct iio_dev *indio_dev,
+			struct iio_buffer *buffer, int bit)
 {
-	struct iio_dev *indio_dev = buffer->indio_dev;
-	long *mask;
-
 	if (bit > indio_dev->masklength)
 		return -EINVAL;
 
 	if (!buffer->scan_mask)
 		return 0;
-	if (indio_dev->available_scan_masks)
-		mask = iio_scan_mask_match(indio_dev->available_scan_masks,
-					   indio_dev->masklength,
-					   buffer->scan_mask);
-	else
-		mask = buffer->scan_mask;
-	if (!mask)
-		return 0;
 
-	return test_bit(bit, mask);
+	return test_bit(bit, buffer->scan_mask);
 };
 EXPORT_SYMBOL_GPL(iio_scan_mask_query);
+
+/**
+ * struct iio_demux_table() - table describing demux memcpy ops
+ * @from:	index to copy from
+ * @to:	index to copy to
+ * @length:	how many bytes to copy
+ * @l:		list head used for management
+ */
+struct iio_demux_table {
+	unsigned from;
+	unsigned to;
+	unsigned length;
+	struct list_head l;
+};
+
+static unsigned char *iio_demux(struct iio_buffer *buffer,
+				 unsigned char *datain)
+{
+	struct iio_demux_table *t;
+
+	if (list_empty(&buffer->demux_list))
+		return datain;
+	list_for_each_entry(t, &buffer->demux_list, l)
+		memcpy(buffer->demux_bounce + t->to,
+		       datain + t->from, t->length);
+
+	return buffer->demux_bounce;
+}
+
+int iio_push_to_buffer(struct iio_buffer *buffer, unsigned char *data,
+		       s64 timestamp)
+{
+	unsigned char *dataout = iio_demux(buffer, data);
+
+	return buffer->access->store_to(buffer, dataout, timestamp);
+}
+EXPORT_SYMBOL_GPL(iio_push_to_buffer);
+
+int iio_update_demux(struct iio_dev *indio_dev)
+{
+	const struct iio_chan_spec *ch;
+	struct iio_buffer *buffer = indio_dev->buffer;
+	int ret, in_ind = -1, out_ind, length;
+	unsigned in_loc = 0, out_loc = 0;
+	struct iio_demux_table *p, *q;
+
+	/* Clear out any old demux */
+	list_for_each_entry_safe(p, q, &buffer->demux_list, l) {
+		list_del(&p->l);
+		kfree(p);
+	}
+	kfree(buffer->demux_bounce);
+	buffer->demux_bounce = NULL;
+
+	/* First work out which scan mode we will actually have */
+	if (bitmap_equal(indio_dev->active_scan_mask,
+			 buffer->scan_mask,
+			 indio_dev->masklength))
+		return 0;
+
+	/* Now we have the two masks, work from least sig and build up sizes */
+	for_each_set_bit(out_ind,
+			 indio_dev->active_scan_mask,
+			 indio_dev->masklength) {
+		in_ind = find_next_bit(indio_dev->active_scan_mask,
+				       indio_dev->masklength,
+				       in_ind + 1);
+		while (in_ind != out_ind) {
+			in_ind = find_next_bit(indio_dev->active_scan_mask,
+					       indio_dev->masklength,
+					       in_ind + 1);
+			ch = iio_find_channel_from_si(indio_dev, in_ind);
+			length = ch->scan_type.storagebits/8;
+			/* Make sure we are aligned */
+			in_loc += length;
+			if (in_loc % length)
+				in_loc += length - in_loc % length;
+		}
+		p = kmalloc(sizeof(*p), GFP_KERNEL);
+		if (p == NULL) {
+			ret = -ENOMEM;
+			goto error_clear_mux_table;
+		}
+		ch = iio_find_channel_from_si(indio_dev, in_ind);
+		length = ch->scan_type.storagebits/8;
+		if (out_loc % length)
+			out_loc += length - out_loc % length;
+		if (in_loc % length)
+			in_loc += length - in_loc % length;
+		p->from = in_loc;
+		p->to = out_loc;
+		p->length = length;
+		list_add_tail(&p->l, &buffer->demux_list);
+		out_loc += length;
+		in_loc += length;
+	}
+	/* Relies on scan_timestamp being last */
+	if (buffer->scan_timestamp) {
+		p = kmalloc(sizeof(*p), GFP_KERNEL);
+		if (p == NULL) {
+			ret = -ENOMEM;
+			goto error_clear_mux_table;
+		}
+		ch = iio_find_channel_from_si(indio_dev,
+			buffer->scan_index_timestamp);
+		length = ch->scan_type.storagebits/8;
+		if (out_loc % length)
+			out_loc += length - out_loc % length;
+		if (in_loc % length)
+			in_loc += length - in_loc % length;
+		p->from = in_loc;
+		p->to = out_loc;
+		p->length = length;
+		list_add_tail(&p->l, &buffer->demux_list);
+		out_loc += length;
+		in_loc += length;
+	}
+	buffer->demux_bounce = kzalloc(out_loc, GFP_KERNEL);
+	if (buffer->demux_bounce == NULL) {
+		ret = -ENOMEM;
+		goto error_clear_mux_table;
+	}
+	return 0;
+
+error_clear_mux_table:
+	list_for_each_entry_safe(p, q, &buffer->demux_list, l) {
+		list_del(&p->l);
+		kfree(p);
+	}
+	return ret;
+}
+EXPORT_SYMBOL_GPL(iio_update_demux);
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index aec9311b108..19f897f3c85 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -25,8 +25,8 @@
 #include "iio.h"
 #include "iio_core.h"
 #include "iio_core_trigger.h"
-#include "chrdev.h"
 #include "sysfs.h"
+#include "events.h"
 
 /* IDA to assign each registered device a unique id*/
 static DEFINE_IDA(iio_ida);
@@ -77,17 +77,29 @@ static const char * const iio_modifier_names[] = {
 
 /* relies on pairs of these shared then separate */
 static const char * const iio_chan_info_postfix[] = {
-	[IIO_CHAN_INFO_SCALE_SHARED/2] = "scale",
-	[IIO_CHAN_INFO_OFFSET_SHARED/2] = "offset",
-	[IIO_CHAN_INFO_CALIBSCALE_SHARED/2] = "calibscale",
-	[IIO_CHAN_INFO_CALIBBIAS_SHARED/2] = "calibbias",
-	[IIO_CHAN_INFO_PEAK_SHARED/2] = "peak_raw",
-	[IIO_CHAN_INFO_PEAK_SCALE_SHARED/2] = "peak_scale",
-	[IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SHARED/2]
-	= "quadrature_correction_raw",
-	[IIO_CHAN_INFO_AVERAGE_RAW_SHARED/2] = "mean_raw",
+	[IIO_CHAN_INFO_SCALE] = "scale",
+	[IIO_CHAN_INFO_OFFSET] = "offset",
+	[IIO_CHAN_INFO_CALIBSCALE] = "calibscale",
+	[IIO_CHAN_INFO_CALIBBIAS] = "calibbias",
+	[IIO_CHAN_INFO_PEAK] = "peak_raw",
+	[IIO_CHAN_INFO_PEAK_SCALE] = "peak_scale",
+	[IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW] = "quadrature_correction_raw",
+	[IIO_CHAN_INFO_AVERAGE_RAW] = "mean_raw",
+	[IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY]
+	= "filter_low_pass_3db_frequency",
 };
 
+const struct iio_chan_spec
+*iio_find_channel_from_si(struct iio_dev *indio_dev, int si)
+{
+	int i;
+
+	for (i = 0; i < indio_dev->num_channels; i++)
+		if (indio_dev->channels[i].scan_index == si)
+			return &indio_dev->channels[i];
+	return NULL;
+}
+
 /**
  * struct iio_detected_event_list - list element for events that have occurred
  * @list:		linked list header
@@ -169,8 +181,11 @@ static ssize_t iio_event_chrdev_read(struct file *filep,
 {
 	struct iio_event_interface *ev_int = filep->private_data;
 	struct iio_detected_event_list *el;
+	size_t len = sizeof(el->ev);
 	int ret;
-	size_t len;
+
+	if (count < len)
+		return -EINVAL;
 
 	mutex_lock(&ev_int->event_list_lock);
 	if (list_empty(&ev_int->det_events)) {
@@ -192,7 +207,6 @@ static ssize_t iio_event_chrdev_read(struct file *filep,
 	el = list_first_entry(&ev_int->det_events,
 			      struct iio_detected_event_list,
 			      list);
-	len = sizeof el->ev;
 	if (copy_to_user(buf, &(el->ev), len)) {
 		ret = -EFAULT;
 		goto error_mutex_unlock;
@@ -415,7 +429,7 @@ int __iio_device_attr_init(struct device_attribute *dev_attr,
 	sysfs_attr_init(&dev_attr->attr);
 
 	/* Build up postfix of <extend_name>_<modifier>_postfix */
-	if (chan->modified) {
+	if (chan->modified && !generic) {
 		if (chan->extend_name)
 			full_postfix = kasprintf(GFP_KERNEL, "%s_%s_%s",
 						 iio_modifier_names[chan
@@ -600,7 +614,7 @@ static int iio_device_add_channel_sysfs(struct iio_dev *indio_dev,
 					     chan,
 					     &iio_read_channel_info,
 					     &iio_write_channel_info,
-					     (1 << i),
+					     i/2,
 					     !(i%2),
 					     &indio_dev->dev,
 					     &indio_dev->channel_attr_list);
@@ -665,10 +679,9 @@ static int iio_device_register_sysfs(struct iio_dev *indio_dev)
 	if (indio_dev->name)
 		attrcount++;
 
-	indio_dev->chan_attr_group.attrs
-		= kzalloc(sizeof(indio_dev->chan_attr_group.attrs[0])*
-			  (attrcount + 1),
-			  GFP_KERNEL);
+	indio_dev->chan_attr_group.attrs = kcalloc(attrcount + 1,
+						   sizeof(indio_dev->chan_attr_group.attrs[0]),
+						   GFP_KERNEL);
 	if (indio_dev->chan_attr_group.attrs == NULL) {
 		ret = -ENOMEM;
 		goto error_clear_attrs;
@@ -788,6 +801,9 @@ static ssize_t iio_ev_value_store(struct device *dev,
 	unsigned long val;
 	int ret;
 
+	if (!indio_dev->info->write_event_value)
+		return -EINVAL;
+
 	ret = strict_strtoul(buf, 10, &val);
 	if (ret)
 		return ret;
@@ -958,10 +974,9 @@ static int iio_device_register_eventset(struct iio_dev *indio_dev)
 	}
 
 	indio_dev->event_interface->group.name = iio_event_group_name;
-	indio_dev->event_interface->group.attrs =
-		kzalloc(sizeof(indio_dev->event_interface->group.attrs[0])
-			*(attrcount + 1),
-			GFP_KERNEL);
+	indio_dev->event_interface->group.attrs = kcalloc(attrcount + 1,
+							  sizeof(indio_dev->event_interface->group.attrs[0]),
+							  GFP_KERNEL);
 	if (indio_dev->event_interface->group.attrs == NULL) {
 		ret = -ENOMEM;
 		goto error_free_setup_event_lines;
@@ -1068,9 +1083,13 @@ static int iio_chrdev_open(struct inode *inode, struct file *filp)
 {
 	struct iio_dev *indio_dev = container_of(inode->i_cdev,
 						struct iio_dev, chrdev);
+
+	if (test_and_set_bit(IIO_BUSY_BIT_POS, &indio_dev->flags))
+		return -EBUSY;
+
 	filp->private_data = indio_dev;
 
-	return iio_chrdev_buffer_open(indio_dev);
+	return 0;
 }
 
 /**
@@ -1078,8 +1097,9 @@ static int iio_chrdev_open(struct inode *inode, struct file *filp)
  **/
 static int iio_chrdev_release(struct inode *inode, struct file *filp)
 {
-	iio_chrdev_buffer_release(container_of(inode->i_cdev,
-					     struct iio_dev, chrdev));
+	struct iio_dev *indio_dev = container_of(inode->i_cdev,
+						struct iio_dev, chrdev);
+	clear_bit(IIO_BUSY_BIT_POS, &indio_dev->flags);
 	return 0;
 }
 
diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c
index 68a4d4e8c63..47ecadd4818 100644
--- a/drivers/staging/iio/industrialio-trigger.c
+++ b/drivers/staging/iio/industrialio-trigger.c
@@ -159,13 +159,12 @@ EXPORT_SYMBOL(iio_trigger_generic_data_rdy_poll);
 void iio_trigger_poll_chained(struct iio_trigger *trig, s64 time)
 {
 	int i;
-	if (!trig->use_count) {
+	if (!trig->use_count)
 		for (i = 0; i < CONFIG_IIO_CONSUMERS_PER_TRIGGER; i++)
 			if (trig->subirqs[i].enabled) {
 				trig->use_count++;
 				handle_nested_irq(trig->subirq_base + i);
 			}
-	}
 }
 EXPORT_SYMBOL(iio_trigger_poll_chained);
 
@@ -173,10 +172,9 @@ void iio_trigger_notify_done(struct iio_trigger *trig)
 {
 	trig->use_count--;
 	if (trig->use_count == 0 && trig->ops && trig->ops->try_reenable)
-		if (trig->ops->try_reenable(trig)) {
+		if (trig->ops->try_reenable(trig))
 			/* Missed and interrupt so launch new poll now */
 			iio_trigger_poll(trig, 0);
-		}
 }
 EXPORT_SYMBOL(iio_trigger_notify_done);
 
@@ -222,8 +220,16 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig,
 	ret = request_threaded_irq(pf->irq, pf->h, pf->thread,
 				   pf->type, pf->name,
 				   pf);
-	if (trig->ops && trig->ops->set_trigger_state && notinuse)
+	if (ret < 0) {
+		module_put(pf->indio_dev->info->driver_module);
+		return ret;
+	}
+
+	if (trig->ops && trig->ops->set_trigger_state && notinuse) {
 		ret = trig->ops->set_trigger_state(trig, true);
+		if (ret < 0)
+			module_put(pf->indio_dev->info->driver_module);
+	}
 
 	return ret;
 }
@@ -336,6 +342,8 @@ static ssize_t iio_trigger_write_current(struct device *dev,
 	mutex_unlock(&indio_dev->mlock);
 
 	trig = iio_trigger_find_by_name(buf, len);
+	if (oldtrig == trig)
+		return len;
 
 	if (trig && indio_dev->info->validate_trigger) {
 		ret = indio_dev->info->validate_trigger(indio_dev, trig);
@@ -473,12 +481,10 @@ void iio_free_trigger(struct iio_trigger *trig)
 }
 EXPORT_SYMBOL(iio_free_trigger);
 
-int iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
+void iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
 {
 	indio_dev->groups[indio_dev->groupcounter++] =
 		&iio_trigger_consumer_attr_group;
-
-	return 0;
 }
 
 void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev)
@@ -490,18 +496,14 @@ void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev)
 
 int iio_triggered_buffer_postenable(struct iio_dev *indio_dev)
 {
-	return indio_dev->trig
-		? iio_trigger_attach_poll_func(indio_dev->trig,
-					       indio_dev->pollfunc)
-		: 0;
+	return iio_trigger_attach_poll_func(indio_dev->trig,
+					    indio_dev->pollfunc);
 }
 EXPORT_SYMBOL(iio_triggered_buffer_postenable);
 
 int iio_triggered_buffer_predisable(struct iio_dev *indio_dev)
 {
-	return indio_dev->trig
-		? iio_trigger_dettach_poll_func(indio_dev->trig,
-						indio_dev->pollfunc)
-		: 0;
+	return iio_trigger_dettach_poll_func(indio_dev->trig,
+					     indio_dev->pollfunc);
 }
 EXPORT_SYMBOL(iio_triggered_buffer_predisable);
diff --git a/drivers/staging/iio/kfifo_buf.c b/drivers/staging/iio/kfifo_buf.c
index e8c234bb18f..e1e9c06cde4 100644
--- a/drivers/staging/iio/kfifo_buf.c
+++ b/drivers/staging/iio/kfifo_buf.c
@@ -11,9 +11,7 @@
 struct iio_kfifo {
 	struct iio_buffer buffer;
 	struct kfifo kf;
-	int use_count;
 	int update_needed;
-	struct mutex use_lock;
 };
 
 #define iio_to_kfifo(r) container_of(r, struct iio_kfifo, buffer)
@@ -33,54 +31,25 @@ static int iio_request_update_kfifo(struct iio_buffer *r)
 	int ret = 0;
 	struct iio_kfifo *buf = iio_to_kfifo(r);
 
-	mutex_lock(&buf->use_lock);
 	if (!buf->update_needed)
 		goto error_ret;
-	if (buf->use_count) {
-		ret = -EAGAIN;
-		goto error_ret;
-	}
 	kfifo_free(&buf->kf);
 	ret = __iio_allocate_kfifo(buf, buf->buffer.bytes_per_datum,
 				   buf->buffer.length);
 error_ret:
-	mutex_unlock(&buf->use_lock);
 	return ret;
 }
 
-static void iio_mark_kfifo_in_use(struct iio_buffer *r)
-{
-	struct iio_kfifo *buf = iio_to_kfifo(r);
-	mutex_lock(&buf->use_lock);
-	buf->use_count++;
-	mutex_unlock(&buf->use_lock);
-}
-
-static void iio_unmark_kfifo_in_use(struct iio_buffer *r)
-{
-	struct iio_kfifo *buf = iio_to_kfifo(r);
-	mutex_lock(&buf->use_lock);
-	buf->use_count--;
-	mutex_unlock(&buf->use_lock);
-}
-
 static int iio_get_length_kfifo(struct iio_buffer *r)
 {
 	return r->length;
 }
 
-static inline void __iio_init_kfifo(struct iio_kfifo *kf)
-{
-	mutex_init(&kf->use_lock);
-}
-
 static IIO_BUFFER_ENABLE_ATTR;
-static IIO_BUFFER_BYTES_PER_DATUM_ATTR;
 static IIO_BUFFER_LENGTH_ATTR;
 
 static struct attribute *iio_kfifo_attributes[] = {
 	&dev_attr_length.attr,
-	&dev_attr_bytes_per_datum.attr,
 	&dev_attr_enable.attr,
 	NULL,
 };
@@ -98,9 +67,8 @@ struct iio_buffer *iio_kfifo_allocate(struct iio_dev *indio_dev)
 	if (!kf)
 		return NULL;
 	kf->update_needed = true;
-	iio_buffer_init(&kf->buffer, indio_dev);
+	iio_buffer_init(&kf->buffer);
 	kf->buffer.attrs = &iio_kfifo_attribute_group;
-	__iio_init_kfifo(kf);
 
 	return &kf->buffer;
 }
@@ -111,20 +79,19 @@ static int iio_get_bytes_per_datum_kfifo(struct iio_buffer *r)
 	return r->bytes_per_datum;
 }
 
-static int iio_set_bytes_per_datum_kfifo(struct iio_buffer *r, size_t bpd)
+static int iio_mark_update_needed_kfifo(struct iio_buffer *r)
 {
-	if (r->bytes_per_datum != bpd) {
-		r->bytes_per_datum = bpd;
-		if (r->access->mark_param_change)
-			r->access->mark_param_change(r);
-	}
+	struct iio_kfifo *kf = iio_to_kfifo(r);
+	kf->update_needed = true;
 	return 0;
 }
 
-static int iio_mark_update_needed_kfifo(struct iio_buffer *r)
+static int iio_set_bytes_per_datum_kfifo(struct iio_buffer *r, size_t bpd)
 {
-	struct iio_kfifo *kf = iio_to_kfifo(r);
-	kf->update_needed = true;
+	if (r->bytes_per_datum != bpd) {
+		r->bytes_per_datum = bpd;
+		iio_mark_update_needed_kfifo(r);
+	}
 	return 0;
 }
 
@@ -132,8 +99,7 @@ static int iio_set_length_kfifo(struct iio_buffer *r, int length)
 {
 	if (r->length != length) {
 		r->length = length;
-		if (r->access->mark_param_change)
-			r->access->mark_param_change(r);
+		iio_mark_update_needed_kfifo(r);
 	}
 	return 0;
 }
@@ -150,16 +116,9 @@ static int iio_store_to_kfifo(struct iio_buffer *r,
 {
 	int ret;
 	struct iio_kfifo *kf = iio_to_kfifo(r);
-	u8 *datal = kmalloc(r->bytes_per_datum, GFP_KERNEL);
-	memcpy(datal, data, r->bytes_per_datum - sizeof(timestamp));
-	memcpy(datal + r->bytes_per_datum - sizeof(timestamp),
-		&timestamp, sizeof(timestamp));
 	ret = kfifo_in(&kf->kf, data, r->bytes_per_datum);
-	if (ret != r->bytes_per_datum) {
-		kfree(datal);
+	if (ret != r->bytes_per_datum)
 		return -EBUSY;
-	}
-	kfree(datal);
 	return 0;
 }
 
@@ -169,17 +128,18 @@ static int iio_read_first_n_kfifo(struct iio_buffer *r,
 	int ret, copied;
 	struct iio_kfifo *kf = iio_to_kfifo(r);
 
-	ret = kfifo_to_user(&kf->kf, buf, r->bytes_per_datum*n, &copied);
+	if (n < r->bytes_per_datum)
+		return -EINVAL;
+
+	n = rounddown(n, r->bytes_per_datum);
+	ret = kfifo_to_user(&kf->kf, buf, n, &copied);
 
 	return copied;
 }
 
 const struct iio_buffer_access_funcs kfifo_access_funcs = {
-	.mark_in_use = &iio_mark_kfifo_in_use,
-	.unmark_in_use = &iio_unmark_kfifo_in_use,
 	.store_to = &iio_store_to_kfifo,
 	.read_first_n = &iio_read_first_n_kfifo,
-	.mark_param_change = &iio_mark_update_needed_kfifo,
 	.request_update = &iio_request_update_kfifo,
 	.get_bytes_per_datum = &iio_get_bytes_per_datum_kfifo,
 	.set_bytes_per_datum = &iio_set_bytes_per_datum_kfifo,
diff --git a/drivers/staging/iio/kfifo_buf.h b/drivers/staging/iio/kfifo_buf.h
index a15598bb9fd..cc2bd9a1ccf 100644
--- a/drivers/staging/iio/kfifo_buf.h
+++ b/drivers/staging/iio/kfifo_buf.h
@@ -1,7 +1,7 @@
 
 #include <linux/kfifo.h>
 #include "iio.h"
-#include "buffer_generic.h"
+#include "buffer.h"
 
 extern const struct iio_buffer_access_funcs kfifo_access_funcs;
 
diff --git a/drivers/staging/iio/light/isl29018.c b/drivers/staging/iio/light/isl29018.c
index 47638362224..849d6a564af 100644
--- a/drivers/staging/iio/light/isl29018.c
+++ b/drivers/staging/iio/light/isl29018.c
@@ -362,8 +362,7 @@ static int isl29018_write_raw(struct iio_dev *indio_dev,
 	int ret = -EINVAL;
 
 	mutex_lock(&chip->lock);
-	if (mask == (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE) &&
-	    chan->type == IIO_LIGHT) {
+	if (mask == IIO_CHAN_INFO_CALIBSCALE && chan->type == IIO_LIGHT) {
 		chip->lux_scale = val;
 		ret = 0;
 	}
@@ -402,7 +401,7 @@ static int isl29018_read_raw(struct iio_dev *indio_dev,
 		if (!ret)
 			ret = IIO_VAL_INT;
 		break;
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		if (chan->type == IIO_LIGHT) {
 			*val = chip->lux_scale;
 			ret = IIO_VAL_INT;
@@ -421,7 +420,7 @@ static const struct iio_chan_spec isl29018_channels[] = {
 		.indexed = 1,
 		.channel = 0,
 		.processed_val = IIO_PROCESSED,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
 	}, {
 		.type = IIO_INTENSITY,
 		.modified = 1,
diff --git a/drivers/staging/iio/light/tsl2563.c b/drivers/staging/iio/light/tsl2563.c
index 1942db13b03..ffca85e81ef 100644
--- a/drivers/staging/iio/light/tsl2563.c
+++ b/drivers/staging/iio/light/tsl2563.c
@@ -37,6 +37,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
+#include "../events.h"
 #include "tsl2563.h"
 
 /* Use this many bits for fraction part. */
@@ -226,6 +227,8 @@ static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id)
 	if (ret < 0)
 		return ret;
 
+	*id = ret;
+
 	return 0;
 }
 
@@ -510,7 +513,7 @@ static int tsl2563_read_raw(struct iio_dev *indio_dev,
 		}
 		break;
 
-	case (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE):
+	case IIO_CHAN_INFO_CALIBSCALE:
 		if (chan->channel == 0)
 			*val = calib_to_sysfs(chip->calib0);
 		else
@@ -536,7 +539,7 @@ static const struct iio_chan_spec tsl2563_channels[] = {
 		.type = IIO_INTENSITY,
 		.modified = 1,
 		.channel2 = IIO_MOD_LIGHT_BOTH,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE),
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
 		.event_mask = (IIO_EV_BIT(IIO_EV_TYPE_THRESH,
 					  IIO_EV_DIR_RISING) |
 			       IIO_EV_BIT(IIO_EV_TYPE_THRESH,
@@ -544,8 +547,8 @@ static const struct iio_chan_spec tsl2563_channels[] = {
 	}, {
 		.type = IIO_INTENSITY,
 		.modified = 1,
-		.channel2 = IIO_MOD_LIGHT_BOTH,
-		.info_mask = (1 << IIO_CHAN_INFO_CALIBSCALE_SEPARATE),
+		.channel2 = IIO_MOD_LIGHT_IR,
+		.info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
 	}
 };
 
diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
index 3836f73a529..5b6455a238d 100644
--- a/drivers/staging/iio/light/tsl2583.c
+++ b/drivers/staging/iio/light/tsl2583.c
@@ -194,6 +194,7 @@ static int taos_get_lux(struct iio_dev *indio_dev)
 {
 	u16 ch0, ch1; /* separated ch0/ch1 data from device */
 	u32 lux; /* raw lux calculated from device data */
+	u64 lux64;
 	u32 ratio;
 	u8 buf[5];
 	struct taos_lux *p;
@@ -297,9 +298,19 @@ static int taos_get_lux(struct iio_dev *indio_dev)
 		lux = (lux + (chip->als_time_scale >> 1)) /
 			chip->als_time_scale;
 
-	/* adjust for active gain scale */
-	lux >>= 13; /* tables have factor of 8192 builtin for accuracy */
-	lux = (lux * chip->taos_settings.als_gain_trim + 500) / 1000;
+	/* Adjust for active gain scale.
+	 * The taos_device_lux tables above have a factor of 8192 built in,
+	 * so we need to shift right.
+	 * User-specified gain provides a multiplier.
+	 * Apply user-specified gain before shifting right to retain precision.
+	 * Use 64 bits to avoid overflow on multiplication.
+	 * Then go back to 32 bits before division to avoid using div_u64().
+	 */
+	lux64 = lux;
+	lux64 = lux64 * chip->taos_settings.als_gain_trim;
+	lux64 >>= 13;
+	lux = lux64;
+	lux = (lux + 500) / 1000;
 	if (lux > TSL258X_LUX_CALC_OVER_FLOW) { /* check for overflow */
 return_max:
 		lux = TSL258X_LUX_CALC_OVER_FLOW;
diff --git a/drivers/staging/iio/magnetometer/ak8975.c b/drivers/staging/iio/magnetometer/ak8975.c
index db31d6d0e5b..3158f12cb05 100644
--- a/drivers/staging/iio/magnetometer/ak8975.c
+++ b/drivers/staging/iio/magnetometer/ak8975.c
@@ -431,7 +431,7 @@ static int ak8975_read_raw(struct iio_dev *indio_dev,
 	switch (mask) {
 	case 0:
 		return ak8975_read_axis(indio_dev, chan->address, val);
-	case (1 << IIO_CHAN_INFO_SCALE_SEPARATE):
+	case IIO_CHAN_INFO_SCALE:
 		*val = data->raw_to_gauss[chan->address];
 		return IIO_VAL_INT;
 	}
@@ -443,7 +443,7 @@ static int ak8975_read_raw(struct iio_dev *indio_dev,
 		.type = IIO_MAGN,					\
 		.modified = 1,						\
 		.channel2 = IIO_MOD_##axis,				\
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SEPARATE),	\
+		.info_mask = IIO_CHAN_INFO_SCALE_SEPARATE_BIT,	\
 		.address = index,					\
 	}
 
diff --git a/drivers/staging/iio/magnetometer/hmc5843.c b/drivers/staging/iio/magnetometer/hmc5843.c
index 7bb1bc60513..f2e85a9cf19 100644
--- a/drivers/staging/iio/magnetometer/hmc5843.c
+++ b/drivers/staging/iio/magnetometer/hmc5843.c
@@ -463,7 +463,7 @@ static int hmc5843_read_raw(struct iio_dev *indio_dev,
 		return hmc5843_read_measurement(indio_dev,
 						chan->address,
 						val);
-	case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+	case IIO_CHAN_INFO_SCALE:
 		*val = 0;
 		*val2 = hmc5843_regval_to_nanoscale[data->range];
 		return IIO_VAL_INT_PLUS_NANO;
@@ -476,7 +476,7 @@ static int hmc5843_read_raw(struct iio_dev *indio_dev,
 		.type = IIO_MAGN,					\
 		.modified = 1,						\
 		.channel2 = IIO_MOD_##axis,				\
-		.info_mask = (1 << IIO_CHAN_INFO_SCALE_SHARED),		\
+		.info_mask = IIO_CHAN_INFO_SCALE_SHARED_BIT,		\
 		.address = add						\
 	}
 
@@ -605,6 +605,7 @@ static const struct i2c_device_id hmc5843_id[] = {
 	{ "hmc5843", 0 },
 	{ }
 };
+MODULE_DEVICE_TABLE(i2c, hmc5843_id);
 
 static struct i2c_driver hmc5843_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/meter/ade7753.c b/drivers/staging/iio/meter/ade7753.c
index 4c7b0cbf49f..57baac6c0d4 100644
--- a/drivers/staging/iio/meter/ade7753.c
+++ b/drivers/staging/iio/meter/ade7753.c
@@ -582,3 +582,4 @@ module_spi_driver(ade7753_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADE7753/6 Single-Phase Multifunction Meter");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:ade7753");
diff --git a/drivers/staging/iio/meter/ade7754.c b/drivers/staging/iio/meter/ade7754.c
index 15c98cde76d..8d81c92007e 100644
--- a/drivers/staging/iio/meter/ade7754.c
+++ b/drivers/staging/iio/meter/ade7754.c
@@ -605,3 +605,4 @@ module_spi_driver(ade7754_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADE7754 Polyphase Multifunction Energy Metering IC Driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:ad7754");
diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c
index 39338bcb187..dcb20294dfe 100644
--- a/drivers/staging/iio/meter/ade7758_core.c
+++ b/drivers/staging/iio/meter/ade7758_core.c
@@ -20,7 +20,7 @@
 
 #include "../iio.h"
 #include "../sysfs.h"
-#include "../buffer_generic.h"
+#include "../buffer.h"
 #include "meter.h"
 #include "ade7758.h"
 
@@ -663,63 +663,63 @@ static const struct attribute_group ade7758_attribute_group = {
 
 static struct iio_chan_spec ade7758_channels[] = {
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "raw", 0, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_A, AD7758_VOLTAGE),
 		0, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 0, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_A, AD7758_CURRENT),
 		1, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 0, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_A, AD7758_APP_PWR),
 		2, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 0, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_A, AD7758_ACT_PWR),
 		3, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 0, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_A, AD7758_REACT_PWR),
 		4, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "raw", 1, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_B, AD7758_VOLTAGE),
 		5, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 1, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_B, AD7758_CURRENT),
 		6, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 1, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_B, AD7758_APP_PWR),
 		7, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 1, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_B, AD7758_ACT_PWR),
 		8, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 1, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_B, AD7758_REACT_PWR),
 		9, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_VOLTAGE, 0, 1, 0, "raw", 2, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_C, AD7758_VOLTAGE),
 		10, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_CURRENT, 0, 1, 0, "raw", 2, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_C, AD7758_CURRENT),
 		11, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "apparent_raw", 2, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_C, AD7758_APP_PWR),
 		12, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "active_raw", 2, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_C, AD7758_ACT_PWR),
 		13, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN(IIO_POWER, 0, 1, 0, "reactive_raw", 2, 0,
-		(1 << IIO_CHAN_INFO_SCALE_SHARED),
+		IIO_CHAN_INFO_SCALE_SHARED_BIT,
 		AD7758_WT(AD7758_PHASE_C, AD7758_REACT_PWR),
 		14, IIO_ST('s', 24, 32, 0), 0),
 	IIO_CHAN_SOFT_TIMESTAMP(15),
@@ -746,12 +746,12 @@ static int __devinit ade7758_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 
 	/* Allocate the comms buffers */
-	st->rx = kzalloc(sizeof(*st->rx)*ADE7758_MAX_RX, GFP_KERNEL);
+	st->rx = kcalloc(ADE7758_MAX_RX, sizeof(*st->rx), GFP_KERNEL);
 	if (st->rx == NULL) {
 		ret = -ENOMEM;
 		goto error_free_dev;
 	}
-	st->tx = kzalloc(sizeof(*st->tx)*ADE7758_MAX_TX, GFP_KERNEL);
+	st->tx = kcalloc(ADE7758_MAX_TX, sizeof(*st->tx), GFP_KERNEL);
 	if (st->tx == NULL) {
 		ret = -ENOMEM;
 		goto error_free_rx;
@@ -843,6 +843,7 @@ static const struct spi_device_id ade7758_id[] = {
 	{"ade7758", 0},
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ade7758_id);
 
 static struct spi_driver ade7758_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c
index 00fa2ac5c45..f29f2b278fe 100644
--- a/drivers/staging/iio/meter/ade7758_ring.c
+++ b/drivers/staging/iio/meter/ade7758_ring.c
@@ -67,7 +67,7 @@ static irqreturn_t ade7758_trigger_handler(int irq, void *p)
 	s64 dat64[2];
 	u32 *dat32 = (u32 *)dat64;
 
-	if (ring->scan_count)
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		if (ade7758_spi_read_burst(&indio_dev->dev) >= 0)
 			*dat32 = get_unaligned_be32(&st->rx_buf[5]) & 0xFFFFFF;
 
@@ -96,10 +96,11 @@ static int ade7758_ring_preenable(struct iio_dev *indio_dev)
 	size_t d_size;
 	unsigned channel;
 
-	if (!ring->scan_count)
+	if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
 		return -EINVAL;
 
-	channel = find_first_bit(ring->scan_mask, indio_dev->masklength);
+	channel = find_first_bit(indio_dev->active_scan_mask,
+				 indio_dev->masklength);
 
 	d_size = st->ade7758_ring_channels[channel].scan_type.storagebits / 8;
 
@@ -145,8 +146,7 @@ int ade7758_configure_ring(struct iio_dev *indio_dev)
 
 	/* Effectively select the ring buffer implementation */
 	indio_dev->buffer->access = &ring_sw_access_funcs;
-	indio_dev->buffer->setup_ops = &ade7758_ring_setup_ops;
-	indio_dev->buffer->owner = THIS_MODULE;
+	indio_dev->setup_ops = &ade7758_ring_setup_ops;
 
 	indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
 						 &ade7758_trigger_handler,
diff --git a/drivers/staging/iio/meter/ade7759.c b/drivers/staging/iio/meter/ade7759.c
index cfa2a5eff12..0beab478dcd 100644
--- a/drivers/staging/iio/meter/ade7759.c
+++ b/drivers/staging/iio/meter/ade7759.c
@@ -526,3 +526,4 @@ module_spi_driver(ade7759_driver);
 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
 MODULE_DESCRIPTION("Analog Devices ADE7759 Active Energy Metering IC Driver");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:ad7759");
diff --git a/drivers/staging/iio/meter/ade7854-spi.c b/drivers/staging/iio/meter/ade7854-spi.c
index c485a79aeec..81121862c1b 100644
--- a/drivers/staging/iio/meter/ade7854-spi.c
+++ b/drivers/staging/iio/meter/ade7854-spi.c
@@ -343,6 +343,7 @@ static const struct spi_device_id ade7854_id[] = {
 	{ "ade7878", 0 },
 	{ }
 };
+MODULE_DEVICE_TABLE(spi, ade7854_id);
 
 static struct spi_driver ade7854_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/resolver/ad2s1200.c b/drivers/staging/iio/resolver/ad2s1200.c
index 1c6a02bfd45..d8ce854c189 100644
--- a/drivers/staging/iio/resolver/ad2s1200.c
+++ b/drivers/staging/iio/resolver/ad2s1200.c
@@ -160,6 +160,7 @@ static const struct spi_device_id ad2s1200_id[] = {
 	{ "ad2s1205" },
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad2s1200_id);
 
 static struct spi_driver ad2s1200_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index ff1b3316d01..c439fcf72be 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -749,6 +749,7 @@ static const struct spi_device_id ad2s1210_id[] = {
 	{ "ad2s1210" },
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad2s1210_id);
 
 static struct spi_driver ad2s1210_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/resolver/ad2s90.c b/drivers/staging/iio/resolver/ad2s90.c
index 6d0794389e7..2a86f582ddf 100644
--- a/drivers/staging/iio/resolver/ad2s90.c
+++ b/drivers/staging/iio/resolver/ad2s90.c
@@ -109,6 +109,7 @@ static const struct spi_device_id ad2s90_id[] = {
 	{ "ad2s90" },
 	{}
 };
+MODULE_DEVICE_TABLE(spi, ad2s90_id);
 
 static struct spi_driver ad2s90_driver = {
 	.driver = {
diff --git a/drivers/staging/iio/ring_sw.c b/drivers/staging/iio/ring_sw.c
index 66a34addb75..3e24ec45585 100644
--- a/drivers/staging/iio/ring_sw.c
+++ b/drivers/staging/iio/ring_sw.c
@@ -23,11 +23,8 @@
  * @data:		the ring buffer memory
  * @read_p:		read pointer (oldest available)
  * @write_p:		write pointer
- * @last_written_p:	read pointer (newest available)
  * @half_p:		half buffer length behind write_p (event generation)
- * @use_count:		reference count to prevent resizing when in use
  * @update_needed:	flag to indicated change in size requested
- * @use_lock:		lock to prevent change in size when in use
  *
  * Note that the first element of all ring buffers must be a
  * struct iio_buffer.
@@ -37,12 +34,9 @@ struct iio_sw_ring_buffer {
 	unsigned char		*data;
 	unsigned char		*read_p;
 	unsigned char		*write_p;
-	unsigned char		*last_written_p;
 	/* used to act as a point at which to signal an event */
 	unsigned char		*half_p;
-	int			use_count;
 	int			update_needed;
-	spinlock_t		use_lock;
 };
 
 #define iio_to_sw_ring(r) container_of(r, struct iio_sw_ring_buffer, buf)
@@ -56,38 +50,15 @@ static inline int __iio_allocate_sw_ring_buffer(struct iio_sw_ring_buffer *ring,
 	ring->data = kmalloc(length*ring->buf.bytes_per_datum, GFP_ATOMIC);
 	ring->read_p = NULL;
 	ring->write_p = NULL;
-	ring->last_written_p = NULL;
 	ring->half_p = NULL;
 	return ring->data ? 0 : -ENOMEM;
 }
 
-static inline void __iio_init_sw_ring_buffer(struct iio_sw_ring_buffer *ring)
-{
-	spin_lock_init(&ring->use_lock);
-}
-
 static inline void __iio_free_sw_ring_buffer(struct iio_sw_ring_buffer *ring)
 {
 	kfree(ring->data);
 }
 
-static void iio_mark_sw_rb_in_use(struct iio_buffer *r)
-{
-	struct iio_sw_ring_buffer *ring = iio_to_sw_ring(r);
-	spin_lock(&ring->use_lock);
-	ring->use_count++;
-	spin_unlock(&ring->use_lock);
-}
-
-static void iio_unmark_sw_rb_in_use(struct iio_buffer *r)
-{
-	struct iio_sw_ring_buffer *ring = iio_to_sw_ring(r);
-	spin_lock(&ring->use_lock);
-	ring->use_count--;
-	spin_unlock(&ring->use_lock);
-}
-
-
 /* Ring buffer related functionality */
 /* Store to ring is typically called in the bh of a data ready interrupt handler
  * in the device driver */
@@ -115,7 +86,6 @@ static int iio_store_to_sw_ring(struct iio_sw_ring_buffer *ring,
 	 * Always valid as either points to latest or second latest value.
 	 * Before this runs it is null and read attempts fail with -EAGAIN.
 	 */
-	ring->last_written_p = ring->write_p;
 	barrier();
 	/* temp_ptr used to ensure we never have an invalid pointer
 	 * it may be slightly lagging, but never invalid
@@ -174,6 +144,7 @@ static int iio_read_first_n_sw_rb(struct iio_buffer *r,
 	u8 *initial_read_p, *initial_write_p, *current_read_p, *end_read_p;
 	u8 *data;
 	int ret, max_copied, bytes_to_rip, dead_offset;
+	size_t data_available, buffer_size;
 
 	/* A userspace program has probably made an error if it tries to
 	 *  read something that is not a whole number of bpds.
@@ -186,9 +157,11 @@ static int iio_read_first_n_sw_rb(struct iio_buffer *r,
 		       n, ring->buf.bytes_per_datum);
 		goto error_ret;
 	}
+
+	buffer_size = ring->buf.bytes_per_datum*ring->buf.length;
+
 	/* Limit size to whole of ring buffer */
-	bytes_to_rip = min((size_t)(ring->buf.bytes_per_datum*ring->buf.length),
-			   n);
+	bytes_to_rip = min_t(size_t, buffer_size, n);
 
 	data = kmalloc(bytes_to_rip, GFP_KERNEL);
 	if (data == NULL) {
@@ -217,38 +190,24 @@ static int iio_read_first_n_sw_rb(struct iio_buffer *r,
 		goto error_free_data_cpy;
 	}
 
-	if (initial_write_p >= initial_read_p + bytes_to_rip) {
-		/* write_p is greater than necessary, all is easy */
-		max_copied = bytes_to_rip;
-		memcpy(data, initial_read_p, max_copied);
-		end_read_p = initial_read_p + max_copied;
-	} else if (initial_write_p > initial_read_p) {
-		/*not enough data to cpy */
-		max_copied = initial_write_p - initial_read_p;
+	if (initial_write_p >= initial_read_p)
+		data_available = initial_write_p - initial_read_p;
+	else
+		data_available = buffer_size - (initial_read_p - initial_write_p);
+
+	if (data_available < bytes_to_rip)
+		bytes_to_rip = data_available;
+
+	if (initial_read_p + bytes_to_rip >= ring->data + buffer_size) {
+		max_copied = ring->data + buffer_size - initial_read_p;
 		memcpy(data, initial_read_p, max_copied);
-		end_read_p = initial_write_p;
+		memcpy(data + max_copied, ring->data, bytes_to_rip - max_copied);
+		end_read_p = ring->data + bytes_to_rip - max_copied;
 	} else {
-		/* going through 'end' of ring buffer */
-		max_copied = ring->data
-			+ ring->buf.length*ring->buf.bytes_per_datum - initial_read_p;
-		memcpy(data, initial_read_p, max_copied);
-		/* possible we are done if we align precisely with end */
-		if (max_copied == bytes_to_rip)
-			end_read_p = ring->data;
-		else if (initial_write_p
-			 > ring->data + bytes_to_rip - max_copied) {
-			/* enough data to finish */
-			memcpy(data + max_copied, ring->data,
-			       bytes_to_rip - max_copied);
-			max_copied = bytes_to_rip;
-			end_read_p = ring->data + (bytes_to_rip - max_copied);
-		} else {  /* not enough data */
-			memcpy(data + max_copied, ring->data,
-			       initial_write_p - ring->data);
-			max_copied += initial_write_p - ring->data;
-			end_read_p = initial_write_p;
-		}
+		memcpy(data, initial_read_p, bytes_to_rip);
+		end_read_p = initial_read_p + bytes_to_rip;
 	}
+
 	/* Now to verify which section was cleanly copied - i.e. how far
 	 * read pointer has been pushed */
 	current_read_p = ring->read_p;
@@ -256,15 +215,14 @@ static int iio_read_first_n_sw_rb(struct iio_buffer *r,
 	if (initial_read_p <= current_read_p)
 		dead_offset = current_read_p - initial_read_p;
 	else
-		dead_offset = ring->buf.length*ring->buf.bytes_per_datum
-			- (initial_read_p - current_read_p);
+		dead_offset = buffer_size - (initial_read_p - current_read_p);
 
 	/* possible issue if the initial write has been lapped or indeed
 	 * the point we were reading to has been passed */
 	/* No valid data read.
 	 * In this case the read pointer is already correct having been
 	 * pushed further than we would look. */
-	if (max_copied - dead_offset < 0) {
+	if (bytes_to_rip - dead_offset < 0) {
 		ret = 0;
 		goto error_free_data_cpy;
 	}
@@ -280,7 +238,7 @@ static int iio_read_first_n_sw_rb(struct iio_buffer *r,
 	while (ring->read_p != end_read_p)
 		ring->read_p = end_read_p;
 
-	ret = max_copied - dead_offset;
+	ret = bytes_to_rip - dead_offset;
 
 	if (copy_to_user(buf, data + dead_offset, ret))  {
 		ret =  -EFAULT;
@@ -305,52 +263,18 @@ static int iio_store_to_sw_rb(struct iio_buffer *r,
 	return iio_store_to_sw_ring(ring, data, timestamp);
 }
 
-static int iio_read_last_from_sw_ring(struct iio_sw_ring_buffer *ring,
-				      unsigned char *data)
-{
-	unsigned char *last_written_p_copy;
-
-	iio_mark_sw_rb_in_use(&ring->buf);
-again:
-	barrier();
-	last_written_p_copy = ring->last_written_p;
-	barrier(); /*unnessecary? */
-	/* Check there is anything here */
-	if (last_written_p_copy == NULL)
-		return -EAGAIN;
-	memcpy(data, last_written_p_copy, ring->buf.bytes_per_datum);
-
-	if (unlikely(ring->last_written_p != last_written_p_copy))
-		goto again;
-
-	iio_unmark_sw_rb_in_use(&ring->buf);
-	return 0;
-}
-
-static int iio_read_last_from_sw_rb(struct iio_buffer *r,
-			     unsigned char *data)
-{
-	return iio_read_last_from_sw_ring(iio_to_sw_ring(r), data);
-}
-
 static int iio_request_update_sw_rb(struct iio_buffer *r)
 {
 	int ret = 0;
 	struct iio_sw_ring_buffer *ring = iio_to_sw_ring(r);
 
 	r->stufftoread = false;
-	spin_lock(&ring->use_lock);
 	if (!ring->update_needed)
 		goto error_ret;
-	if (ring->use_count) {
-		ret = -EAGAIN;
-		goto error_ret;
-	}
 	__iio_free_sw_ring_buffer(ring);
 	ret = __iio_allocate_sw_ring_buffer(ring, ring->buf.bytes_per_datum,
 					    ring->buf.length);
 error_ret:
-	spin_unlock(&ring->use_lock);
 	return ret;
 }
 
@@ -360,12 +284,18 @@ static int iio_get_bytes_per_datum_sw_rb(struct iio_buffer *r)
 	return ring->buf.bytes_per_datum;
 }
 
+static int iio_mark_update_needed_sw_rb(struct iio_buffer *r)
+{
+	struct iio_sw_ring_buffer *ring = iio_to_sw_ring(r);
+	ring->update_needed = true;
+	return 0;
+}
+
 static int iio_set_bytes_per_datum_sw_rb(struct iio_buffer *r, size_t bpd)
 {
 	if (r->bytes_per_datum != bpd) {
 		r->bytes_per_datum = bpd;
-		if (r->access->mark_param_change)
-			r->access->mark_param_change(r);
+		iio_mark_update_needed_sw_rb(r);
 	}
 	return 0;
 }
@@ -379,27 +309,17 @@ static int iio_set_length_sw_rb(struct iio_buffer *r, int length)
 {
 	if (r->length != length) {
 		r->length = length;
-		if (r->access->mark_param_change)
-			r->access->mark_param_change(r);
+		iio_mark_update_needed_sw_rb(r);
 	}
 	return 0;
 }
 
-static int iio_mark_update_needed_sw_rb(struct iio_buffer *r)
-{
-	struct iio_sw_ring_buffer *ring = iio_to_sw_ring(r);
-	ring->update_needed = true;
-	return 0;
-}
-
 static IIO_BUFFER_ENABLE_ATTR;
-static IIO_BUFFER_BYTES_PER_DATUM_ATTR;
 static IIO_BUFFER_LENGTH_ATTR;
 
 /* Standard set of ring buffer attributes */
 static struct attribute *iio_ring_attributes[] = {
 	&dev_attr_length.attr,
-	&dev_attr_bytes_per_datum.attr,
 	&dev_attr_enable.attr,
 	NULL,
 };
@@ -419,8 +339,7 @@ struct iio_buffer *iio_sw_rb_allocate(struct iio_dev *indio_dev)
 		return NULL;
 	ring->update_needed = true;
 	buf = &ring->buf;
-	iio_buffer_init(buf, indio_dev);
-	__iio_init_sw_ring_buffer(ring);
+	iio_buffer_init(buf);
 	buf->attrs = &iio_ring_attribute_group;
 
 	return buf;
@@ -434,12 +353,8 @@ void iio_sw_rb_free(struct iio_buffer *r)
 EXPORT_SYMBOL(iio_sw_rb_free);
 
 const struct iio_buffer_access_funcs ring_sw_access_funcs = {
-	.mark_in_use = &iio_mark_sw_rb_in_use,
-	.unmark_in_use = &iio_unmark_sw_rb_in_use,
 	.store_to = &iio_store_to_sw_rb,
-	.read_last = &iio_read_last_from_sw_rb,
 	.read_first_n = &iio_read_first_n_sw_rb,
-	.mark_param_change = &iio_mark_update_needed_sw_rb,
 	.request_update = &iio_request_update_sw_rb,
 	.get_bytes_per_datum = &iio_get_bytes_per_datum_sw_rb,
 	.set_bytes_per_datum = &iio_set_bytes_per_datum_sw_rb,
diff --git a/drivers/staging/iio/ring_sw.h b/drivers/staging/iio/ring_sw.h
index a3e15784c22..e6a6e2c4096 100644
--- a/drivers/staging/iio/ring_sw.h
+++ b/drivers/staging/iio/ring_sw.h
@@ -23,7 +23,7 @@
 
 #ifndef _IIO_RING_SW_H_
 #define _IIO_RING_SW_H_
-#include "buffer_generic.h"
+#include "buffer.h"
 
 /**
  * ring_sw_access_funcs - access functions for a software ring buffer
diff --git a/drivers/staging/iio/sysfs.h b/drivers/staging/iio/sysfs.h
index 868952b5ba6..bfedb73b850 100644
--- a/drivers/staging/iio/sysfs.h
+++ b/drivers/staging/iio/sysfs.h
@@ -114,47 +114,4 @@ struct iio_const_attr {
 #define IIO_CONST_ATTR_TEMP_SCALE(_string)		\
 	IIO_CONST_ATTR(in_temp_scale, _string)
 
-enum iio_event_type {
-	IIO_EV_TYPE_THRESH,
-	IIO_EV_TYPE_MAG,
-	IIO_EV_TYPE_ROC,
-	IIO_EV_TYPE_THRESH_ADAPTIVE,
-	IIO_EV_TYPE_MAG_ADAPTIVE,
-};
-
-enum iio_event_direction {
-	IIO_EV_DIR_EITHER,
-	IIO_EV_DIR_RISING,
-	IIO_EV_DIR_FALLING,
-};
-
-#define IIO_EVENT_CODE(chan_type, diff, modifier, direction,		\
-		       type, chan, chan1, chan2)			\
-	(((u64)type << 56) | ((u64)diff << 55) |			\
-	 ((u64)direction << 48) | ((u64)modifier << 40) |		\
-	 ((u64)chan_type << 32) | (chan2 << 16) | chan1 | chan)
-
-#define IIO_EV_DIR_MAX 4
-#define IIO_EV_BIT(type, direction)			\
-	(1 << (type*IIO_EV_DIR_MAX + direction))
-
-#define IIO_MOD_EVENT_CODE(channelclass, number, modifier,		\
-			   type, direction)				\
-	IIO_EVENT_CODE(channelclass, 0, modifier, direction, type, number, 0, 0)
-
-#define IIO_UNMOD_EVENT_CODE(channelclass, number, type, direction)	\
-	IIO_EVENT_CODE(channelclass, 0, 0, direction, type, number, 0, 0)
-
-#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
-
-#define IIO_EVENT_CODE_EXTRACT_DIR(mask) ((mask >> 48) & 0xCF)
-
-#define IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(mask) ((mask >> 32) & 0xFF)
-
-/* Event code number extraction depends on which type of event we have.
- * Perhaps review this function in the future*/
-#define IIO_EVENT_CODE_EXTRACT_NUM(mask) (mask & 0xFFFF)
-
-#define IIO_EVENT_CODE_EXTRACT_MODIFIER(mask) ((mask >> 40) & 0xFF)
-
 #endif /* _INDUSTRIAL_IO_SYSFS_H_ */
diff --git a/drivers/staging/iio/trigger.h b/drivers/staging/iio/trigger.h
index 5cc42a655c8..1cfca231db8 100644
--- a/drivers/staging/iio/trigger.h
+++ b/drivers/staging/iio/trigger.h
@@ -46,7 +46,6 @@ struct iio_trigger_ops {
  * @private_data:	[DRIVER] device specific data
  * @list:		[INTERN] used in maintenance of global trigger list
  * @alloc_list:		[DRIVER] used for driver specific trigger list
- * @owner:		[DRIVER] used to monitor usage count of the trigger.
  * @use_count:		use count for the trigger
  * @subirq_chip:	[INTERN] associate 'virtual' irq chip.
  * @subirq_base:	[INTERN] base number for irqs provided by trigger.
@@ -63,7 +62,6 @@ struct iio_trigger {
 	void				*private_data;
 	struct list_head		list;
 	struct list_head		alloc_list;
-	struct module			*owner;
 	int use_count;
 
 	struct irq_chip			subirq_chip;
diff --git a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
index d35d085da94..bd7416b2c56 100644
--- a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
+++ b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
@@ -125,7 +125,6 @@ static int iio_trig_periodic_rtc_probe(struct platform_device *dev)
 			goto error_put_trigger_and_remove_from_list;
 		}
 		trig->private_data = trig_info;
-		trig->owner = THIS_MODULE;
 		trig->ops = &iio_prtc_trigger_ops;
 		/* RTC access */
 		trig_info->rtc
diff --git a/drivers/staging/iio/types.h b/drivers/staging/iio/types.h
new file mode 100644
index 00000000000..b7d26474ad0
--- /dev/null
+++ b/drivers/staging/iio/types.h
@@ -0,0 +1,49 @@
+/* industrial I/O data types needed both in and out of kernel
+ *
+ * Copyright (c) 2008 Jonathan Cameron
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#ifndef _IIO_TYPES_H_
+#define _IIO_TYPES_H_
+
+enum iio_chan_type {
+	/* real channel types */
+	IIO_VOLTAGE,
+	IIO_CURRENT,
+	IIO_POWER,
+	IIO_ACCEL,
+	IIO_ANGL_VEL,
+	IIO_MAGN,
+	IIO_LIGHT,
+	IIO_INTENSITY,
+	IIO_PROXIMITY,
+	IIO_TEMP,
+	IIO_INCLI,
+	IIO_ROT,
+	IIO_ANGL,
+	IIO_TIMESTAMP,
+	IIO_CAPACITANCE,
+};
+
+enum iio_modifier {
+	IIO_NO_MOD,
+	IIO_MOD_X,
+	IIO_MOD_Y,
+	IIO_MOD_Z,
+	IIO_MOD_X_AND_Y,
+	IIO_MOD_X_AND_Z,
+	IIO_MOD_Y_AND_Z,
+	IIO_MOD_X_AND_Y_AND_Z,
+	IIO_MOD_X_OR_Y,
+	IIO_MOD_X_OR_Z,
+	IIO_MOD_Y_OR_Z,
+	IIO_MOD_X_OR_Y_OR_Z,
+	IIO_MOD_LIGHT_BOTH,
+	IIO_MOD_LIGHT_IR,
+};
+
+#endif /* _IIO_TYPES_H_ */