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backlight: backlight: Document inline functions in backlight.h 

Add documentation for the inline functions in backlight.h

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Sam Ravnborg 2020-07-19 10:07:30 +02:00 committed by Lee Jones
parent 6f10cd124c
commit d160fd4e91
1 changed files with 16 additions and 0 deletions
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16
include/linux/backlight.h
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@ -268,6 +268,10 @@ struct backlight_device {
int use_count; int use_count;
}; };
/**
* backlight_update_status - force an update of the backlight device status
* @bd: the backlight device
*/
static inline int backlight_update_status(struct backlight_device *bd) static inline int backlight_update_status(struct backlight_device *bd)
{ {
int ret = -ENOENT; int ret = -ENOENT;
@ -361,6 +365,18 @@ extern int backlight_device_set_brightness(struct backlight_device *bd, unsigned
#define to_backlight_device(obj) container_of(obj, struct backlight_device, dev) #define to_backlight_device(obj) container_of(obj, struct backlight_device, dev)
/**
* bl_get_data - access devdata
* @bl_dev: pointer to backlight device
*
* When a backlight device is registered the driver has the possibility
* to supply a void * devdata. bl_get_data() return a pointer to the
* devdata.
*
* RETURNS:
*
* pointer to devdata stored while registering the backlight device.
*/
static inline void * bl_get_data(struct backlight_device *bl_dev) static inline void * bl_get_data(struct backlight_device *bl_dev)
{ {
return dev_get_drvdata(&bl_dev->dev); return dev_get_drvdata(&bl_dev->dev);