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