NAME

SYNOPSIS

int
BACKLIGHT_GET_STATUS(device_t bus, struct backlight_props *props);

int
BACKLIGHT_SET_STATUS(device_t bus, struct backlight_props *props);

struct cdev *
backlight_register(const char *name, device_t dev);

int
backlight_destroy(struct cdev *cdev);

DESCRIPTION

Drivers for backlight system register themselves globally using the backlight_register() function. They must define two methods, BACKLIGHT_GET_STATUS() which is used to query the current brightness level and BACKLIGHT_SET_STATUS() which is used to update it.

INTERFACE

BACKLIGHT_GET_STATUS(device_t bus, struct backlight_props *props)

Driver fills the current brightless level and the optional supported levels.

BACKLIGHT_SET_STATUS(device_t bus, struct backlight_props *props)

Driver update the backlight level based on the brightness member of the props struct.

FILES

/dev/backlight/*

 

HISTORY