Commit 3c4c1b69 authored by Corentin Chary's avatar Corentin Chary Committed by Len Brown
Browse files

video/backlight: document sysfs interface 



Date and KernelVersion may be wrong because the backlight
interface was introduced before git initial import.

Cc:Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarCorentin Chary <corentincj@iksaif.net>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent d0a6825c

Documentation/ABI/stable/sysfs-class-backlight

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+36 −0
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What:		/sys/class/backlight/<backlight>/bl_power

Date:		April 2005

KernelVersion:	2.6.12

Contact:	Richard Purdie <rpurdie@rpsys.net>

Description:

		Control BACKLIGHT power, values are FB_BLANK_* from fb.h

		 - FB_BLANK_UNBLANK (0)   : power on.

		 - FB_BLANK_POWERDOWN (4) : power off

Users:		HAL



What:		/sys/class/backlight/<backlight>/brightness

Date:		April 2005

KernelVersion:	2.6.12

Contact:	Richard Purdie <rpurdie@rpsys.net>

Description:

		Control the brightness for this <backlight>. Values

		are between 0 and max_brightness. This file will also

		show the brightness level stored in the driver, which

		may not be the actual brightness (see actual_brightness).

Users:		HAL



What:		/sys/class/backlight/<backlight>/actual_brightness

Date:		March 2006

KernelVersion:	2.6.17

Contact:	Richard Purdie <rpurdie@rpsys.net>

Description:

		Show the actual brightness by querying the hardware.

Users:		HAL



What:		/sys/class/backlight/<backlight>/max_brightness

Date:		April 2005

KernelVersion:	2.6.12

Contact:	Richard Purdie <rpurdie@rpsys.net>

Description:

		Maximum brightness for <backlight>.

Users:		HAL

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