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/leds.h>
  18
  19 static inline void led_set_brightness(struct led_classdev *led_cdev,
  20                                         enum led_brightness value)
  21 {
  22         if (value > LED_FULL)
  23                 value = LED_FULL;
  24         led_cdev->brightness = value;
  25         if (!(led_cdev->flags & LED_SUSPENDED))
  26                 led_cdev->brightness_set(led_cdev, value);
  27 }
  28
  29 extern rwlock_t leds_list_lock;
  30 extern struct list_head leds_list;
  31
  32 #ifdef CONFIG_LEDS_TRIGGERS
  33 void led_trigger_set_default(struct led_classdev *led_cdev);
  34 void led_trigger_set(struct led_classdev *led_cdev,
  35                         struct led_trigger *trigger);
  36 #else
  37 #define led_trigger_set_default(x) do {} while(0)
  38 #define led_trigger_set(x, y) do {} while(0)
  39 #endif
  40
  41 ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
  42                         const char *buf, size_t count);
  43 ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
  44                         char *buf);
  45
  46 #endif  /* __LEDS_H_INCLUDED */