summaryrefslogtreecommitdiff
path: root/drivers/mfd
diff options
context:
space:
mode:
authorHaojian Zhuang <haojian.zhuang@marvell.com>2011-03-07 23:43:16 +0800
committerSamuel Ortiz <sameo@linux.intel.com>2011-03-23 10:42:07 +0100
commit09b034191acd1f95a749630fe366a84d3029930c (patch)
tree41a28ea82b39afc63f5d7500cee4ce3a1d15afe3 /drivers/mfd
parentc9f560b3d0222f6a6e3faeda324e786e230e4f20 (diff)
mfd: Append additional read write on 88pm860x
Append the additional read/write operation on 88pm860x for accessing test page in 88PM860x. Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/88pm860x-i2c.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/mfd/88pm860x-i2c.c b/drivers/mfd/88pm860x-i2c.c
index bc02e6b21608..e017dc88622a 100644
--- a/drivers/mfd/88pm860x-i2c.c
+++ b/drivers/mfd/88pm860x-i2c.c
@@ -126,6 +126,109 @@ out:
}
EXPORT_SYMBOL(pm860x_set_bits);
+int pm860x_page_reg_read(struct i2c_client *i2c, int reg)
+{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ unsigned char zero = 0;
+ unsigned char data;
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ pm860x_write_device(i2c, 0xFA, 0, &zero);
+ pm860x_write_device(i2c, 0xFB, 0, &zero);
+ pm860x_write_device(i2c, 0xFF, 0, &zero);
+ ret = pm860x_read_device(i2c, reg, 1, &data);
+ if (ret >= 0)
+ ret = (int)data;
+ pm860x_write_device(i2c, 0xFE, 0, &zero);
+ pm860x_write_device(i2c, 0xFC, 0, &zero);
+ mutex_unlock(&chip->io_lock);
+ return ret;
+}
+EXPORT_SYMBOL(pm860x_page_reg_read);
+
+int pm860x_page_reg_write(struct i2c_client *i2c, int reg,
+ unsigned char data)
+{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ unsigned char zero;
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ pm860x_write_device(i2c, 0xFA, 0, &zero);
+ pm860x_write_device(i2c, 0xFB, 0, &zero);
+ pm860x_write_device(i2c, 0xFF, 0, &zero);
+ ret = pm860x_write_device(i2c, reg, 1, &data);
+ pm860x_write_device(i2c, 0xFE, 0, &zero);
+ pm860x_write_device(i2c, 0xFC, 0, &zero);
+ mutex_unlock(&chip->io_lock);
+ return ret;
+}
+EXPORT_SYMBOL(pm860x_page_reg_write);
+
+int pm860x_page_bulk_read(struct i2c_client *i2c, int reg,
+ int count, unsigned char *buf)
+{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ unsigned char zero = 0;
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ pm860x_write_device(i2c, 0xFA, 0, &zero);
+ pm860x_write_device(i2c, 0xFB, 0, &zero);
+ pm860x_write_device(i2c, 0xFF, 0, &zero);
+ ret = pm860x_read_device(i2c, reg, count, buf);
+ pm860x_write_device(i2c, 0xFE, 0, &zero);
+ pm860x_write_device(i2c, 0xFC, 0, &zero);
+ mutex_unlock(&chip->io_lock);
+ return ret;
+}
+EXPORT_SYMBOL(pm860x_page_bulk_read);
+
+int pm860x_page_bulk_write(struct i2c_client *i2c, int reg,
+ int count, unsigned char *buf)
+{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ unsigned char zero = 0;
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ pm860x_write_device(i2c, 0xFA, 0, &zero);
+ pm860x_write_device(i2c, 0xFB, 0, &zero);
+ pm860x_write_device(i2c, 0xFF, 0, &zero);
+ ret = pm860x_write_device(i2c, reg, count, buf);
+ pm860x_write_device(i2c, 0xFE, 0, &zero);
+ pm860x_write_device(i2c, 0xFC, 0, &zero);
+ mutex_unlock(&chip->io_lock);
+ return ret;
+}
+EXPORT_SYMBOL(pm860x_page_bulk_write);
+
+int pm860x_page_set_bits(struct i2c_client *i2c, int reg,
+ unsigned char mask, unsigned char data)
+{
+ struct pm860x_chip *chip = i2c_get_clientdata(i2c);
+ unsigned char zero;
+ unsigned char value;
+ int ret;
+
+ mutex_lock(&chip->io_lock);
+ pm860x_write_device(i2c, 0xFA, 0, &zero);
+ pm860x_write_device(i2c, 0xFB, 0, &zero);
+ pm860x_write_device(i2c, 0xFF, 0, &zero);
+ ret = pm860x_read_device(i2c, reg, 1, &value);
+ if (ret < 0)
+ goto out;
+ value &= ~mask;
+ value |= data;
+ ret = pm860x_write_device(i2c, reg, 1, &value);
+out:
+ pm860x_write_device(i2c, 0xFE, 0, &zero);
+ pm860x_write_device(i2c, 0xFC, 0, &zero);
+ mutex_unlock(&chip->io_lock);
+ return ret;
+}
+EXPORT_SYMBOL(pm860x_page_set_bits);
static const struct i2c_device_id pm860x_id_table[] = {
{ "88PM860x", 0 },