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/rwsem.h>
  17 #include <linux/leds.h>
  18
  19 static inline void led_set_brightness_async(struct led_classdev *led_cdev,
  20                                         enum led_brightness value)
  21 {
  22         value = min(value, led_cdev->max_brightness);
  23         led_cdev->brightness = value;
  24
  25         if (!(led_cdev->flags & LED_SUSPENDED))
  26                 led_cdev->brightness_set(led_cdev, value);
  27 }
  28
  29 static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
  30                                         enum led_brightness value)
  31 {
  32         int ret = 0;
  33
  34         led_cdev->brightness = min(value, led_cdev->max_brightness);
  35
  36         if (!(led_cdev->flags & LED_SUSPENDED))
  37                 ret = led_cdev->brightness_set_sync(led_cdev,
  38                                                 led_cdev->brightness);
  39         return ret;
  40 }
  41
  42 static inline int led_get_brightness(struct led_classdev *led_cdev)
  43 {
  44         return led_cdev->brightness;
  45 }
  46
  47 void led_init_core(struct led_classdev *led_cdev);
  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 #endif  /* __LEDS_H_INCLUDED */