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/*
* Backlight Lowlevel Control Abstraction
*
* Copyright (C) 2003,2004 Hewlett-Packard Company
*
*/
#ifndef _LINUX_BACKLIGHT_H
#define _LINUX_BACKLIGHT_H
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
enum backlight_update_reason {
BACKLIGHT_UPDATE_HOTKEY,
BACKLIGHT_UPDATE_SYSFS,
};
enum backlight_type {
BACKLIGHT_RAW = 1,
BACKLIGHT_PLATFORM,
BACKLIGHT_FIRMWARE,
BACKLIGHT_TYPE_MAX,
};
struct backlight_device;
struct fb_info;
struct backlight_ops {
unsigned int options;
#define BL_CORE_SUSPENDRESUME (1 << 0)
int (*update_status)(struct backlight_device *);
int (*get_brightness)(struct backlight_device *);
int (*check_fb)(struct backlight_device *, struct fb_info *);
};
struct backlight_properties {
int brightness;
int max_brightness;
int power;
int fb_blank;
enum backlight_type type;
unsigned int state;
#define BL_CORE_SUSPENDED (1 << 0)
#define BL_CORE_FBBLANK (1 << 1)
#define BL_CORE_DRIVER4 (1 << 28)
#define BL_CORE_DRIVER3 (1 << 29)
#define BL_CORE_DRIVER2 (1 << 30)
#define BL_CORE_DRIVER1 (1 << 31)
};
struct backlight_device {
struct backlight_properties props;
struct mutex update_lock;
struct mutex ops_lock;
const struct backlight_ops *ops;
struct notifier_block fb_notif;
struct device dev;
};
static inline void backlight_update_status(struct backlight_device *bd)
{
mutex_lock(&bd->update_lock);
if (bd->ops && bd->ops->update_status)
bd->ops->update_status(bd);
mutex_unlock(&bd->update_lock);
}
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 void backlight_device_unregister(struct backlight_device *bd);
extern void backlight_force_update(struct backlight_device *bd,
enum backlight_update_reason reason);
#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 {
const char *name;
int max_intensity;
int default_intensity;
int limit_mask;
void (*set_bl_intensity)(int intensity);
void (*kick_battery)(void);
};
#endif
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