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_async(struct led_classdev *led_cdev, 21 enum led_brightness value) 22 { 23 value = min(value, led_cdev->max_brightness); 24 led_cdev->brightness = value; 25 26 if (!(led_cdev->flags & LED_SUSPENDED)) 27 led_cdev->brightness_set(led_cdev, value); 28 } 29 30 static inline int led_set_brightness_sync(struct led_classdev *led_cdev, 31 enum led_brightness value) 32 { 33 int ret = 0; 34 35 led_cdev->brightness = min(value, led_cdev->max_brightness); 36 37 if (!(led_cdev->flags & LED_SUSPENDED)) 38 ret = led_cdev->brightness_set_sync(led_cdev, 39 led_cdev->brightness); 40 return ret; 41 } 42 43 static inline int led_get_brightness(struct led_classdev *led_cdev) 44 { 45 return led_cdev->brightness; 46 } 47 48 void led_stop_software_blink(struct led_classdev *led_cdev); 49 50 extern struct rw_semaphore leds_list_lock; 51 extern struct list_head leds_list; 52 53 #ifdef CONFIG_LEDS_TRIGGERS 54 void led_trigger_set_default(struct led_classdev *led_cdev); 55 void led_trigger_set(struct led_classdev *led_cdev, 56 struct led_trigger *trigger); 57 void led_trigger_remove(struct led_classdev *led_cdev); 58 59 static inline void *led_get_trigger_data(struct led_classdev *led_cdev) 60 { 61 return led_cdev->trigger_data; 62 } 63 64 #else 65 #define led_trigger_set_default(x) do {} while (0) 66 #define led_trigger_set(x, y) do {} while (0) 67 #define led_trigger_remove(x) do {} while (0) 68 #define led_get_trigger_data(x) (NULL) 69 #endif 70 71 ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, 72 const char *buf, size_t count); 73 ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, 74 char *buf); 75 76 #endif /* __LEDS_H_INCLUDED */ 77