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Diffstat (limited to 'Documentation/ABI/stable/sysfs-class-backlight')
| -rw-r--r-- | Documentation/ABI/stable/sysfs-class-backlight | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/Documentation/ABI/stable/sysfs-class-backlight b/Documentation/ABI/stable/sysfs-class-backlight deleted file mode 100644 index 70302f370e7..00000000000 --- a/Documentation/ABI/stable/sysfs-class-backlight +++ /dev/null @@ -1,56 +0,0 @@ -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 - -What: /sys/class/backlight/<backlight>/type -Date: September 2010 -KernelVersion: 2.6.37 -Contact: Matthew Garrett <mjg@redhat.com> -Description: - The type of interface controlled by <backlight>. - "firmware": The driver uses a standard firmware interface - "platform": The driver uses a platform-specific interface - "raw": The driver controls hardware registers directly - - In the general case, when multiple backlight - interfaces are available for a single device, firmware - control should be preferred to platform control should - be preferred to raw control. Using a firmware - interface reduces the probability of confusion with - the hardware and the OS independently updating the - backlight state. Platform interfaces are mostly a - holdover from pre-standardisation of firmware - interfaces. |