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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 18:46:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 18:46:13 -0700
commit8f446a7a069e0af0639385f67c78ee2279bca04c (patch)
tree580cf495616b36ca0af0826afa87c430cdc1e7cb /arch/arm/mach-shark
parent84be4ae2c038e2b03d650cbf2a7cfd9e8d6e9e51 (diff)
parent04ef037c926ddb31088c976538e29eada4fd1490 (diff)
Merge tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM soc driver specific changes from Olof Johansson: - A long-coming conversion of various platforms to a common LED infrastructure - AT91 is moved over to use the newer MCI driver for MMC - Pincontrol conversions for samsung platforms - DT bindings for gscaler on samsung - i2c driver fixes for tegra, acked by i2c maintainer Fix up conflicts as per Olof. * tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (48 commits) drivers: bus: omap_l3: use resources instead of hardcoded irqs pinctrl: exynos: Fix wakeup IRQ domain registration check pinctrl: samsung: Uninline samsung_pinctrl_get_soc_data pinctrl: exynos: Correct the detection of wakeup-eint node pinctrl: exynos: Mark exynos_irq_demux_eint as inline pinctrl: exynos: Handle only unmasked wakeup interrupts pinctrl: exynos: Fix typos in gpio/wkup _irq_mask pinctrl: exynos: Set pin function to EINT in irq_set_type of GPIO EINTa drivers: bus: Move the OMAP interconnect driver to drivers/bus/ i2c: tegra: dynamically control fast clk i2c: tegra: I2_M_NOSTART functionality not supported in Tegra20 ARM: tegra: clock: remove unused clock entry for i2c ARM: tegra: clock: add connection name in i2c clock entry i2c: tegra: pass proper name for getting clock ARM: tegra: clock: add i2c fast clock entry in clock table ARM: EXYNOS: Adds G-Scaler device from Device Tree ARM: EXYNOS: Add clock support for G-Scaler ARM: EXYNOS: Enable pinctrl driver support for EXYNOS4 device tree enabled platform ARM: dts: Add pinctrl node entries for SAMSUNG EXYNOS4210 SoC ARM: EXYNOS: skip wakeup interrupt setup if pinctrl driver is used ...
Diffstat (limited to 'arch/arm/mach-shark')
-rw-r--r--arch/arm/mach-shark/Makefile4
-rw-r--r--arch/arm/mach-shark/core.c1
-rw-r--r--arch/arm/mach-shark/leds.c220
3 files changed, 87 insertions, 138 deletions
diff --git a/arch/arm/mach-shark/Makefile b/arch/arm/mach-shark/Makefile
index 45be9b04e7b..29657183c45 100644
--- a/arch/arm/mach-shark/Makefile
+++ b/arch/arm/mach-shark/Makefile
@@ -4,9 +4,7 @@
# Object file lists.
-obj-y := core.o dma.o irq.o pci.o
+obj-y := core.o dma.o irq.o pci.o leds.o
obj-m :=
obj-n :=
obj- :=
-
-obj-$(CONFIG_LEDS) += leds.o
diff --git a/arch/arm/mach-shark/core.c b/arch/arm/mach-shark/core.c
index d35b94ef73b..9ad2e9737fb 100644
--- a/arch/arm/mach-shark/core.c
+++ b/arch/arm/mach-shark/core.c
@@ -13,7 +13,6 @@
#include <asm/setup.h>
#include <asm/mach-types.h>
-#include <asm/leds.h>
#include <asm/param.h>
#include <asm/system_misc.h>
diff --git a/arch/arm/mach-shark/leds.c b/arch/arm/mach-shark/leds.c
index 25609076921..081c778a10a 100644
--- a/arch/arm/mach-shark/leds.c
+++ b/arch/arm/mach-shark/leds.c
@@ -1,165 +1,117 @@
/*
- * arch/arm/mach-shark/leds.c
- * by Alexander Schulz
- *
- * derived from:
- * arch/arm/kernel/leds-footbridge.c
- * Copyright (C) 1998-1999 Russell King
- *
* DIGITAL Shark LED control routines.
*
- * The leds use is as follows:
- * - Green front - toggles state every 50 timer interrupts
- * - Amber front - Unused, this is a dual color led (Amber/Green)
- * - Amber back - On if system is not idle
+ * Driver for the 3 user LEDs found on the Shark
+ * Based on Versatile and RealView machine LED code
*
- * Changelog:
+ * License terms: GNU General Public License (GPL) version 2
+ * Author: Bryan Wu <bryan.wu@canonical.com>
*/
#include <linux/kernel.h>
-#include <linux/module.h>
#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/ioport.h>
#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
-#include <asm/leds.h>
+#include <asm/mach-types.h>
-#define LED_STATE_ENABLED 1
-#define LED_STATE_CLAIMED 2
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+struct shark_led {
+ struct led_classdev cdev;
+ u8 mask;
+};
-#define SEQUOIA_LED_GREEN (1<<6)
-#define SEQUOIA_LED_AMBER (1<<5)
-#define SEQUOIA_LED_BACK (1<<7)
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static const struct {
+ const char *name;
+ const char *trigger;
+} shark_leds[] = {
+ { "shark:amber0", "default-on", }, /* Bit 5 */
+ { "shark:green", "heartbeat", }, /* Bit 6 */
+ { "shark:amber1", "cpu0" }, /* Bit 7 */
+};
+
+static u16 led_reg_read(void)
+{
+ outw(0x09, 0x24);
+ return inw(0x26);
+}
-static char led_state;
-static short hw_led_state;
-static short saved_state;
+static void led_reg_write(u16 value)
+{
+ outw(0x09, 0x24);
+ outw(value, 0x26);
+}
-static DEFINE_RAW_SPINLOCK(leds_lock);
+static void shark_led_set(struct led_classdev *cdev,
+ enum led_brightness b)
+{
+ struct shark_led *led = container_of(cdev,
+ struct shark_led, cdev);
+ u16 reg = led_reg_read();
-short sequoia_read(int addr) {
- outw(addr,0x24);
- return inw(0x26);
-}
+ if (b != LED_OFF)
+ reg |= led->mask;
+ else
+ reg &= ~led->mask;
-void sequoia_write(short value,short addr) {
- outw(addr,0x24);
- outw(value,0x26);
+ led_reg_write(reg);
}
-static void sequoia_leds_event(led_event_t evt)
+static enum led_brightness shark_led_get(struct led_classdev *cdev)
{
- unsigned long flags;
-
- raw_spin_lock_irqsave(&leds_lock, flags);
+ struct shark_led *led = container_of(cdev,
+ struct shark_led, cdev);
+ u16 reg = led_reg_read();
- hw_led_state = sequoia_read(0x09);
+ return (reg & led->mask) ? LED_FULL : LED_OFF;
+}
- switch (evt) {
- case led_start:
- hw_led_state |= SEQUOIA_LED_GREEN;
- hw_led_state |= SEQUOIA_LED_AMBER;
-#ifdef CONFIG_LEDS_CPU
- hw_led_state |= SEQUOIA_LED_BACK;
-#else
- hw_led_state &= ~SEQUOIA_LED_BACK;
-#endif
- led_state |= LED_STATE_ENABLED;
- break;
-
- case led_stop:
- hw_led_state &= ~SEQUOIA_LED_BACK;
- hw_led_state |= SEQUOIA_LED_GREEN;
- hw_led_state |= SEQUOIA_LED_AMBER;
- led_state &= ~LED_STATE_ENABLED;
- break;
-
- case led_claim:
- led_state |= LED_STATE_CLAIMED;
- saved_state = hw_led_state;
- hw_led_state &= ~SEQUOIA_LED_BACK;
- hw_led_state |= SEQUOIA_LED_GREEN;
- hw_led_state |= SEQUOIA_LED_AMBER;
- break;
-
- case led_release:
- led_state &= ~LED_STATE_CLAIMED;
- hw_led_state = saved_state;
- break;
-
-#ifdef CONFIG_LEDS_TIMER
- case led_timer:
- if (!(led_state & LED_STATE_CLAIMED))
- hw_led_state ^= SEQUOIA_LED_GREEN;
- break;
-#endif
+static int __init shark_leds_init(void)
+{
+ int i;
+ u16 reg;
-#ifdef CONFIG_LEDS_CPU
- case led_idle_start:
- if (!(led_state & LED_STATE_CLAIMED))
- hw_led_state &= ~SEQUOIA_LED_BACK;
- break;
+ if (!machine_is_shark())
+ return -ENODEV;
- case led_idle_end:
- if (!(led_state & LED_STATE_CLAIMED))
- hw_led_state |= SEQUOIA_LED_BACK;
- break;
-#endif
+ for (i = 0; i < ARRAY_SIZE(shark_leds); i++) {
+ struct shark_led *led;
- case led_green_on:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state &= ~SEQUOIA_LED_GREEN;
- break;
-
- case led_green_off:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state |= SEQUOIA_LED_GREEN;
- break;
-
- case led_amber_on:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state &= ~SEQUOIA_LED_AMBER;
- break;
-
- case led_amber_off:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state |= SEQUOIA_LED_AMBER;
- break;
-
- case led_red_on:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state |= SEQUOIA_LED_BACK;
- break;
-
- case led_red_off:
- if (led_state & LED_STATE_CLAIMED)
- hw_led_state &= ~SEQUOIA_LED_BACK;
- break;
-
- default:
- break;
- }
+ led = kzalloc(sizeof(*led), GFP_KERNEL);
+ if (!led)
+ break;
- if (led_state & LED_STATE_ENABLED)
- sequoia_write(hw_led_state,0x09);
+ led->cdev.name = shark_leds[i].name;
+ led->cdev.brightness_set = shark_led_set;
+ led->cdev.brightness_get = shark_led_get;
+ led->cdev.default_trigger = shark_leds[i].trigger;
- raw_spin_unlock_irqrestore(&leds_lock, flags);
-}
+ /* Count in 5 bits offset */
+ led->mask = BIT(i + 5);
-static int __init leds_init(void)
-{
- extern void (*leds_event)(led_event_t);
- short temp;
-
- leds_event = sequoia_leds_event;
+ if (led_classdev_register(NULL, &led->cdev) < 0) {
+ kfree(led);
+ break;
+ }
+ }
/* Make LEDs independent of power-state */
- request_region(0x24,4,"sequoia");
- temp = sequoia_read(0x09);
- temp |= 1<<10;
- sequoia_write(temp,0x09);
- leds_event(led_start);
+ request_region(0x24, 4, "led_reg");
+ reg = led_reg_read();
+ reg |= 1 << 10;
+ led_reg_write(reg);
+
return 0;
}
-__initcall(leds_init);
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(shark_leds_init);
+#endif