drivers/leds/leds.h

   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_FULL)
  24                 value = LED_FULL;
  25         led_cdev->brightness = value;
  26         if (!(led_cdev->flags & LED_SUSPENDED))
  27                 led_cdev->brightness_set(led_cdev, value);
  28 }
  29
  30 extern struct rw_semaphore leds_list_lock;
  31 extern struct list_head leds_list;
  32
  33 #ifdef CONFIG_LEDS_TRIGGERS
  34 void led_trigger_set_default(struct led_classdev *led_cdev);
  35 void led_trigger_set(struct led_classdev *led_cdev,
  36                         struct led_trigger *trigger);
  37 #else
  38 #define led_trigger_set_default(x) do {} while(0)
  39 #define led_trigger_set(x, y) do {} while(0)
  40 #endif
  41
  42 ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
  43                         const char *buf, size_t count);
  44 ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
  45                         char *buf);
  46
  47 #endif  /* __LEDS_H_INCLUDED */