leds: trigger: Introduce a kernel panic LED trigger (916fe619) · Commits · 戴 / test

drivers/leds/trigger/Kconfig

+7 −0

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		@@ -108,4 +108,11 @@ config LEDS_TRIGGER_CAMERA
		This enables direct flash/torch on/off by the driver, kernel space.
		If unsure, say Y.

		config LEDS_TRIGGER_PANIC
		bool "LED Panic Trigger"
		depends on LEDS_TRIGGERS
		help
		This allows LEDs to be configured to blink on a kernel panic.
		If unsure, say Y.

		endif # LEDS_TRIGGERS

+1 −0

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		@@ -8,3 +8,4 @@ obj-$(CONFIG_LEDS_TRIGGER_CPU) += ledtrig-cpu.o
		obj-$(CONFIG_LEDS_TRIGGER_DEFAULT_ON) += ledtrig-default-on.o
		obj-$(CONFIG_LEDS_TRIGGER_TRANSIENT) += ledtrig-transient.o
		obj-$(CONFIG_LEDS_TRIGGER_CAMERA) += ledtrig-camera.o
		obj-$(CONFIG_LEDS_TRIGGER_PANIC) += ledtrig-panic.o

0 → 100644

+30 −0

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		/*
		* Kernel Panic LED Trigger
		*
		* Copyright 2016 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*
		*/

		#include <linux/kernel.h>
		#include <linux/init.h>
		#include <linux/leds.h>

		static struct led_trigger *trigger;

		static long led_panic_blink(int state)
		{
		led_trigger_event(trigger, state ? LED_FULL : LED_OFF);
		return 0;
		}

		static int __init ledtrig_panic_init(void)
		{
		led_trigger_register_simple("panic", &trigger);
		panic_blink = led_panic_blink;
		return 0;
		}
		device_initcall(ledtrig_panic_init);