include/linux/leds.h

   1 /*
   2  * Driver model for leds and led triggers
   3  *
   4  * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
   5  * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  */
  12 #ifndef __LINUX_LEDS_H_INCLUDED
  13 #define __LINUX_LEDS_H_INCLUDED
  14
  15 struct device;
  16 struct class_device;
  17 /*
  18  * LED Core
  19  */
  20
  21 enum led_brightness {
  22         LED_OFF = 0,
  23         LED_HALF = 127,
  24         LED_FULL = 255,
  25 };
  26
  27 struct led_classdev {
  28         const char *name;
  29         int brightness;
  30         int flags;
  31 #define LED_SUSPENDED       (1 << 0)
  32
  33         /* A function to set the brightness of the led */
  34         void (*brightness_set)(struct led_classdev *led_cdev,
  35                                 enum led_brightness brightness);
  36
  37         struct class_device *class_dev;
  38         /* LED Device linked list */
  39         struct list_head node;
  40
  41         /* Trigger data */
  42         char *default_trigger;
  43 };
  44
  45 extern int led_classdev_register(struct device *parent,
  46                                 struct led_classdev *led_cdev);
  47 extern void led_classdev_unregister(struct led_classdev *led_cdev);
  48 extern void led_classdev_suspend(struct led_classdev *led_cdev);
  49 extern void led_classdev_resume(struct led_classdev *led_cdev);
  50
  51 #endif          /* __LINUX_LEDS_H_INCLUDED */