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/* 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);
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