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 20 static 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 30 static inline int led_get_brightness(struct led_classdev *led_cdev) 31 { 32 return led_cdev->brightness; 33 } 34 35 extern struct rw_semaphore leds_list_lock; 36 extern struct list_head leds_list; 37 38 #ifdef CONFIG_LEDS_TRIGGERS 39 void led_trigger_set_default(struct led_classdev *led_cdev); 40 void led_trigger_set(struct led_classdev *led_cdev, 41 struct led_trigger *trigger); 42 void led_trigger_remove(struct led_classdev *led_cdev); 43 44 static inline void *led_get_trigger_data(struct led_classdev *led_cdev) 45 { 46 return led_cdev->trigger_data; 47 } 48 49 #else 50 #define led_trigger_set_default(x) do {} while (0) 51 #define led_trigger_set(x, y) do {} while (0) 52 #define led_trigger_remove(x) do {} while (0) 53 #define led_get_trigger_data(x) (NULL) 54 #endif 55 56 ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, 57 const char *buf, size_t count); 58 ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, 59 char *buf); 60 61 #endif /* __LEDS_H_INCLUDED */ 62