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ledtrig-sleep: Add led trigger for sleep debugging.

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Signed-off-by: Brian Swetland <swetland@google.com>
This commit is contained in:
Arve Hjønnevåg
2008-03-30 21:47:13 -07:00
committed by Colin Cross
parent fa56540eb5
commit 04bbdfd360
3 changed files with 87 additions and 0 deletions
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6
drivers/leds/Kconfig
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@@ -466,6 +466,12 @@ config LEDS_TRIGGER_DEFAULT_ON
This allows LEDs to be initialised in the ON state.
If unsure, say Y.
config LEDS_TRIGGER_SLEEP
tristate "LED Sleep Mode Trigger"
depends on LEDS_TRIGGERS && HAS_EARLYSUSPEND
help
This turns LEDs on when the screen is off but the cpu still running.
comment "iptables trigger is under Netfilter config (LED target)"
depends on LEDS_TRIGGERS

1
drivers/leds/Makefile
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@@ -54,3 +54,4 @@ obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT) += ledtrig-heartbeat.o
obj-$(CONFIG_LEDS_TRIGGER_BACKLIGHT) += ledtrig-backlight.o
obj-$(CONFIG_LEDS_TRIGGER_GPIO) += ledtrig-gpio.o
obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
obj-$(CONFIG_LEDS_TRIGGER_SLEEP) += ledtrig-sleep.o

80
drivers/leds/ledtrig-sleep.c Normal file
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@@ -0,0 +1,80 @@
/* drivers/leds/ledtrig-sleep.c
*
* Copyright (C) 2007 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/earlysuspend.h>
#include <linux/leds.h>
#include <linux/suspend.h>
static int ledtrig_sleep_pm_callback(struct notifier_block *nfb,
unsigned long action,
void *ignored);
DEFINE_LED_TRIGGER(ledtrig_sleep)
static struct notifier_block ledtrig_sleep_pm_notifier = {
.notifier_call = ledtrig_sleep_pm_callback,
.priority = 0,
};
static void ledtrig_sleep_early_suspend(struct early_suspend *h)
{
led_trigger_event(ledtrig_sleep, LED_FULL);
}
static void ledtrig_sleep_early_resume(struct early_suspend *h)
{
led_trigger_event(ledtrig_sleep, LED_OFF);
}
static struct early_suspend ledtrig_sleep_early_suspend_handler = {
.suspend = ledtrig_sleep_early_suspend,
.resume = ledtrig_sleep_early_resume,
};
static int ledtrig_sleep_pm_callback(struct notifier_block *nfb,
unsigned long action,
void *ignored)
{
switch (action) {
case PM_HIBERNATION_PREPARE:
case PM_SUSPEND_PREPARE:
led_trigger_event(ledtrig_sleep, LED_OFF);
return NOTIFY_OK;
case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
led_trigger_event(ledtrig_sleep, LED_FULL);
return NOTIFY_OK;
}
return NOTIFY_DONE;
}
static int __init ledtrig_sleep_init(void)
{
led_trigger_register_simple("sleep", &ledtrig_sleep);
register_pm_notifier(&ledtrig_sleep_pm_notifier);
register_early_suspend(&ledtrig_sleep_early_suspend_handler);
return 0;
}
static void __exit ledtrig_sleep_exit(void)
{
unregister_early_suspend(&ledtrig_sleep_early_suspend_handler);
unregister_pm_notifier(&ledtrig_sleep_pm_notifier);
led_trigger_unregister_simple(ledtrig_sleep);
}
module_init(ledtrig_sleep_init);
module_exit(ledtrig_sleep_exit);