1/* 2 * LED Core 3 * 4 * Copyright 2005 Openedhand Ltd. 5 * 6 * Author: Richard Purdie <rpurdie@openedhand.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 */ 13#ifndef __LEDS_H_INCLUDED 14#define __LEDS_H_INCLUDED 15 16#include <linux/device.h> 17#include <linux/rwsem.h> 18#include <linux/leds.h> 19 20static inline void led_set_brightness(struct led_classdev *led_cdev, 21 enum led_brightness value) 22{ 23 if (value > led_cdev->max_brightness) 24 value = led_cdev->max_brightness; 25 led_cdev->brightness = value; 26 if (!(led_cdev->flags & LED_SUSPENDED)) 27 led_cdev->brightness_set(led_cdev, value); 28} 29 30static inline int led_get_brightness(struct led_classdev *led_cdev) 31{ 32 return led_cdev->brightness; 33} 34 35extern struct rw_semaphore leds_list_lock; 36extern struct list_head leds_list; 37 38#ifdef CONFIG_LEDS_TRIGGERS 39void led_trigger_set_default(struct led_classdev *led_cdev); 40void led_trigger_set(struct led_classdev *led_cdev, 41 struct led_trigger *trigger); 42void led_trigger_remove(struct led_classdev *led_cdev); 43#else 44#define led_trigger_set_default(x) do {} while (0) 45#define led_trigger_set(x, y) do {} while (0) 46#define led_trigger_remove(x) do {} while (0) 47#endif 48 49ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, 50 const char *buf, size_t count); 51ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, 52 char *buf); 53 54#endif /* __LEDS_H_INCLUDED */ 55