#ifndef _LINUX_BACKLIGHT_H

#define _LINUX_BACKLIGHT_H

#include <linux/device.h>

#include <linux/fb.h>

#include <linux/mutex.h>

#include <linux/notifier.h>

enum backlight_update_reason {

BACKLIGHT_UPDATE_HOTKEY,

BACKLIGHT_UPDATE_SYSFS,

};

enum backlight_type {

};

enum backlight_notification {

BACKLIGHT_REGISTERED,

BACKLIGHT_UNREGISTERED,

};

struct backlight_device;

struct fb_info;

struct backlight_ops {

};

struct backlight_properties {

};

struct backlight_device {

};

static inline int backlight_update_status(struct backlight_device *bd)

{

int ret = -ENOENT;

mutex_lock(&bd->update_lock);

if (bd->ops && bd->ops->update_status)

ret = bd->ops->update_status(bd);

mutex_unlock(&bd->update_lock);

return ret;

}

extern struct backlight_device *backlight_device_register(const char *name,

struct device *dev, void *devdata, const struct backlight_ops *ops,

const struct backlight_properties *props);

extern struct backlight_device *devm_backlight_device_register(

struct device *dev, const char *name, struct device *parent,

void *devdata, const struct backlight_ops *ops,

const struct backlight_properties *props);

extern void backlight_device_unregister(struct backlight_device *bd);

extern void devm_backlight_device_unregister(struct device *dev,

struct backlight_device *bd);

extern void backlight_force_update(struct backlight_device *bd,

enum backlight_update_reason reason);

extern bool backlight_device_registered(enum backlight_type type);

extern int backlight_register_notifier(struct notifier_block *nb);

extern int backlight_unregister_notifier(struct notifier_block *nb);

#define to_backlight_device(obj) container_of(obj, struct backlight_device, dev)

static inline void * bl_get_data(struct backlight_device *bl_dev)

{

return dev_get_drvdata(&bl_dev->dev);

}

struct generic_bl_info {

};

#ifdef CONFIG_OF

struct backlight_device *of_find_backlight_by_node(struct device_node *node);

static inline struct backlight_device *

of_find_backlight_by_node(struct device_node *node)

{

return NULL;

}