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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/leds/leds.h
15109 views
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/*

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 * LED Core

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 *

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 * Copyright 2005 Openedhand Ltd.

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 *

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 * Author: Richard Purdie <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License version 2 as

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 * published by the Free Software Foundation.

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 *

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 */

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#ifndef __LEDS_H_INCLUDED

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#define __LEDS_H_INCLUDED

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#include <linux/device.h>

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#include <linux/rwsem.h>

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#include <linux/leds.h>

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static inline void led_set_brightness(struct led_classdev *led_cdev,

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					enum led_brightness value)

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{

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	if (value > led_cdev->max_brightness)

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		value = led_cdev->max_brightness;

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	led_cdev->brightness = value;

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	if (!(led_cdev->flags & LED_SUSPENDED))

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		led_cdev->brightness_set(led_cdev, value);

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}

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static inline int led_get_brightness(struct led_classdev *led_cdev)

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{

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	return led_cdev->brightness;

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}

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extern struct rw_semaphore leds_list_lock;

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extern struct list_head leds_list;

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#ifdef CONFIG_LEDS_TRIGGERS

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void led_trigger_set_default(struct led_classdev *led_cdev);

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void led_trigger_set(struct led_classdev *led_cdev,

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			struct led_trigger *trigger);

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void led_trigger_remove(struct led_classdev *led_cdev);

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static inline void *led_get_trigger_data(struct led_classdev *led_cdev)

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{

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	return led_cdev->trigger_data;

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}

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#else

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#define led_trigger_set_default(x) do {} while (0)

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#define led_trigger_set(x, y) do {} while (0)

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#define led_trigger_remove(x) do {} while (0)

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#define led_get_trigger_data(x) (NULL)

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#endif

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ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,

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			const char *buf, size_t count);

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ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,

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			char *buf);

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#endif	/* __LEDS_H_INCLUDED */

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