leds.h

来自「linux 内核源代码」· C头文件 代码 · 共 48 行

/*
 * LED Core
 *
 * Copyright 2005 Openedhand Ltd.
 *
 * Author: Richard Purdie <[e-mail]>
 *
 * 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.
 *
 */
#ifndef __LEDS_H_INCLUDED
#define __LEDS_H_INCLUDED

#include <linux/device.h>
#include <linux/rwsem.h>
#include <linux/leds.h>

static inline void led_set_brightness(struct led_classdev *led_cdev,
					enum led_brightness value)
{
	if (value > LED_FULL)
		value = LED_FULL;
	led_cdev->brightness = value;
	if (!(led_cdev->flags & LED_SUSPENDED))
		led_cdev->brightness_set(led_cdev, value);
}

extern struct rw_semaphore leds_list_lock;
extern struct list_head leds_list;

#ifdef CONFIG_LEDS_TRIGGERS
void led_trigger_set_default(struct led_classdev *led_cdev);
void led_trigger_set(struct led_classdev *led_cdev,
			struct led_trigger *trigger);
#else
#define led_trigger_set_default(x) do {} while(0)
#define led_trigger_set(x, y) do {} while(0)
#endif

ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
			const char *buf, size_t count);
ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
			char *buf);

#endif	/* __LEDS_H_INCLUDED */