linux/drivers/leds/leds.h
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   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
  20static inline void __led_set_brightness(struct led_classdev *led_cdev,
  21                                        enum led_brightness value)
  22{
  23        if (value > led_cdev->max_brightness)
  24                value = led_cdev->max_brightness;
  25        led_cdev->brightness = value;
  26        if (!(led_cdev->flags & LED_SUSPENDED))
  27                led_cdev->brightness_set(led_cdev, value);
  28}
  29
  30static inline int led_get_brightness(struct led_classdev *led_cdev)
  31{
  32        return led_cdev->brightness;
  33}
  34
  35void led_stop_software_blink(struct led_classdev *led_cdev);
  36
  37extern struct rw_semaphore leds_list_lock;
  38extern struct list_head leds_list;
  39
  40#ifdef CONFIG_LEDS_TRIGGERS
  41void led_trigger_set_default(struct led_classdev *led_cdev);
  42void led_trigger_set(struct led_classdev *led_cdev,
  43                        struct led_trigger *trigger);
  44void led_trigger_remove(struct led_classdev *led_cdev);
  45
  46static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
  47{
  48        return led_cdev->trigger_data;
  49}
  50
  51#else
  52#define led_trigger_set_default(x) do {} while (0)
  53#define led_trigger_set(x, y) do {} while (0)
  54#define led_trigger_remove(x) do {} while (0)
  55#define led_get_trigger_data(x) (NULL)
  56#endif
  57
  58ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
  59                        const char *buf, size_t count);
  60ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
  61                        char *buf);
  62
  63#endif  /* __LEDS_H_INCLUDED */
  64
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