diff options
Diffstat (limited to 'Documentation')
3 files changed, 65 insertions, 46 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-backlight b/Documentation/ABI/testing/sysfs-class-backlight index 3ab175a3f5cb..1fc86401bf95 100644 --- a/Documentation/ABI/testing/sysfs-class-backlight +++ b/Documentation/ABI/testing/sysfs-class-backlight @@ -24,3 +24,63 @@ Description: non-linear The brightness changes non-linearly with each step. Brightness controls should use a linear mapping for a linear perception. + +What: /sys/class/backlight/<backlight>/ambient_light_level +Date: Apr, 2010 +KernelVersion: v2.6.35 +Contact: Michael Hennerich <michael.hennerich@analog.com> +Description: + (RO) Get conversion value of the light sensor. + + The value is automatically updated every 80 ms when the + light sensor is enabled. + + The value range is device-driver specific: + + For ADP8870: + + It returns integer between 0 (dark) and 8000 (max ambient + brightness). + + For ADP8860: + + It returns a 13-bits integer. + +What: /sys/class/backlight/<backlight>/ambient_light_zone +Date: Apr, 2010 +KernelVersion: v2.6.35 +Contact: Michael Hennerich <michael.hennerich@analog.com>, + device-drivers-devel@blackfin.uclinux.org + +Description: + (RW) Read or write the specific brightness level at which the + backlight operates. + + The value meaning is device-driver specific: + + For ADP8860: + + == ========================== + 0 Off: Backlight set to 0 mA + 1 Level 1: daylight + 2 Level 2: bright + 3 Level 3: dark + == ========================== + + For ADP8870: + + == ========================== + 0 Off: Backlight set to 0 mA + 1 Level 1: daylight + 2 Level 2: bright + 3 Level 3: office + 4 Level 4: indoor + 5 Level 5: dark + == ========================== + + Writing 0 returns to normal/automatic ambient light level + operation. + + It can be enabled by writing the value stored in + /sys/class/backlight/<backlight>/max_brightness to + /sys/class/backlight/<backlight>/brightness. diff --git a/Documentation/ABI/testing/sysfs-class-backlight-adp8860 b/Documentation/ABI/testing/sysfs-class-backlight-adp8860 index 54d61c788b1b..6610ac73f9ba 100644 --- a/Documentation/ABI/testing/sysfs-class-backlight-adp8860 +++ b/Documentation/ABI/testing/sysfs-class-backlight-adp8860 @@ -6,25 +6,8 @@ adp8860, adp8861 and adp8863 devices: daylight (level 1), office (level 2) and dark (level 3). By default the brightness operates at the daylight brightness level. -What: /sys/class/backlight/<backlight>/ambient_light_level -Date: Apr, 2010 -KernelVersion: v2.6.35 -Contact: Michael Hennerich <michael.hennerich@analog.com> -Description: - (RO) 13-bit conversion value for the first light sensor—high - byte (Bit 12 to Bit 8). The value is updated every 80 ms (when - the light sensor is enabled). - - -What: /sys/class/backlight/<backlight>/ambient_light_zone -Date: Apr, 2010 -KernelVersion: v2.6.35 -Contact: Michael Hennerich <michael.hennerich@analog.com> -Description: - (RW) Read or write the specific level at which the backlight - operates. Value "0" enables automatic ambient light sensing, and - values "1", "2" or "3" set the control to daylight, office or - dark respectively. +See also /sys/class/backlight/<backlight>/ambient_light_level and +/sys/class/backlight/<backlight>/ambient_light_zone. What: /sys/class/backlight/<backlight>/l1_daylight_max diff --git a/Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870 b/Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870 index 33e648808117..b08ca912cad4 100644 --- a/Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870 +++ b/Documentation/ABI/testing/sysfs-class-backlight-driver-adp8870 @@ -1,3 +1,6 @@ +See also /sys/class/backlight/<backlight>/ambient_light_level and +/sys/class/backlight/<backlight>/ambient_light_zone. + What: /sys/class/backlight/<backlight>/<ambient light zone>_max What: /sys/class/backlight/<backlight>/l1_daylight_max What: /sys/class/backlight/<backlight>/l2_bright_max @@ -27,30 +30,3 @@ Description: set to 0. Full off when the backlight is disabled. This file will also show the dim brightness level stored for this <ambient light zone>. - -What: /sys/class/backlight/<backlight>/ambient_light_level -Date: May 2011 -KernelVersion: 3.0 -Contact: device-drivers-devel@blackfin.uclinux.org -Description: - Get conversion value of the light sensor. - This value is updated every 80 ms (when the light sensor - is enabled). Returns integer between 0 (dark) and - 8000 (max ambient brightness) - -What: /sys/class/backlight/<backlight>/ambient_light_zone -Date: May 2011 -KernelVersion: 3.0 -Contact: device-drivers-devel@blackfin.uclinux.org -Description: - Get/Set current ambient light zone. Reading returns - integer between 1..5 (1 = daylight, 2 = bright, ..., 5 = dark). - Writing a value between 1..5 forces the backlight controller - to enter the corresponding ambient light zone. - Writing 0 returns to normal/automatic ambient light level - operation. The ambient light sensing feature on these devices - is an extension to the API documented in - Documentation/ABI/stable/sysfs-class-backlight. - It can be enabled by writing the value stored in - /sys/class/backlight/<backlight>/max_brightness to - /sys/class/backlight/<backlight>/brightness. |