1c72a1d60SRichard Purdie /* 2c72a1d60SRichard Purdie * LED Core 3c72a1d60SRichard Purdie * 4c72a1d60SRichard Purdie * Copyright 2005 Openedhand Ltd. 5c72a1d60SRichard Purdie * 6c72a1d60SRichard Purdie * Author: Richard Purdie <rpurdie@openedhand.com> 7c72a1d60SRichard Purdie * 8c72a1d60SRichard Purdie * This program is free software; you can redistribute it and/or modify 9c72a1d60SRichard Purdie * it under the terms of the GNU General Public License version 2 as 10c72a1d60SRichard Purdie * published by the Free Software Foundation. 11c72a1d60SRichard Purdie * 12c72a1d60SRichard Purdie */ 13c72a1d60SRichard Purdie #ifndef __LEDS_H_INCLUDED 14c72a1d60SRichard Purdie #define __LEDS_H_INCLUDED 15c72a1d60SRichard Purdie 16f8a7c6feSRichard Purdie #include <linux/device.h> 1772f8da32SRichard Purdie #include <linux/rwsem.h> 18c72a1d60SRichard Purdie #include <linux/leds.h> 19c72a1d60SRichard Purdie 20c72a1d60SRichard Purdie static inline void led_set_brightness(struct led_classdev *led_cdev, 21c72a1d60SRichard Purdie enum led_brightness value) 22c72a1d60SRichard Purdie { 23*1bd465e6SGuennadi Liakhovetski if (value > led_cdev->max_brightness) 24*1bd465e6SGuennadi Liakhovetski value = led_cdev->max_brightness; 25c72a1d60SRichard Purdie led_cdev->brightness = value; 26c72a1d60SRichard Purdie if (!(led_cdev->flags & LED_SUSPENDED)) 27c72a1d60SRichard Purdie led_cdev->brightness_set(led_cdev, value); 28c72a1d60SRichard Purdie } 29c72a1d60SRichard Purdie 300013b23dSNémeth Márton static inline int led_get_brightness(struct led_classdev *led_cdev) 310013b23dSNémeth Márton { 320013b23dSNémeth Márton return led_cdev->brightness; 330013b23dSNémeth Márton } 340013b23dSNémeth Márton 3572f8da32SRichard Purdie extern struct rw_semaphore leds_list_lock; 36c72a1d60SRichard Purdie extern struct list_head leds_list; 37c72a1d60SRichard Purdie 38c3bc9956SRichard Purdie #ifdef CONFIG_LEDS_TRIGGERS 39c3bc9956SRichard Purdie void led_trigger_set_default(struct led_classdev *led_cdev); 40c3bc9956SRichard Purdie void led_trigger_set(struct led_classdev *led_cdev, 41c3bc9956SRichard Purdie struct led_trigger *trigger); 420013b23dSNémeth Márton void led_trigger_remove(struct led_classdev *led_cdev); 43c3bc9956SRichard Purdie #else 44c3bc9956SRichard Purdie #define led_trigger_set_default(x) do {} while (0) 45c3bc9956SRichard Purdie #define led_trigger_set(x, y) do {} while (0) 460013b23dSNémeth Márton #define led_trigger_remove(x) do {} while (0) 47c3bc9956SRichard Purdie #endif 48c3bc9956SRichard Purdie 49f8a7c6feSRichard Purdie ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, 50f8a7c6feSRichard Purdie const char *buf, size_t count); 51f8a7c6feSRichard Purdie ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, 52f8a7c6feSRichard Purdie char *buf); 53c3bc9956SRichard Purdie 54c72a1d60SRichard Purdie #endif /* __LEDS_H_INCLUDED */ 55