diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/leds/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/leds/Makefile | 1 | ||||
| -rw-r--r-- | drivers/leds/ledtrig-sleep.c | 80 |
3 files changed, 87 insertions, 0 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index e4112622e5a2..3845131ee555 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -373,6 +373,12 @@ 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 diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 7d6b95831f8e..5fe6885c77a3 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -49,3 +49,4 @@ 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 diff --git a/drivers/leds/ledtrig-sleep.c b/drivers/leds/ledtrig-sleep.c new file mode 100644 index 000000000000..f16404212152 --- /dev/null +++ b/drivers/leds/ledtrig-sleep.c @@ -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); + |