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| author | Mark Brown <broonie@kernel.org> | 2020-12-04 20:39:45 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-12-04 20:39:45 +0000 |
| commit | 4ecc08b2f51d874f35185724eda769492b60a18d (patch) | |
| tree | f4d9e97304e9ff423fd4efa5193a1b94ebfc5912 /Documentation/ABI/testing/sysfs-class-backlight | |
| parent | 0b3355b070434f9901f641aac9000df93e2c96ad (diff) | |
| parent | 0d2bf11a6b3e275a526b8d42d8d4a3a6067cf953 (diff) | |
Merge tag 'auxbus-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core into asoc-5.11
Auxiliary Bus support tag for 5.11-rc1
This is a signed tag for other subsystems to be able to pull in the
auxiliary bus support into their trees for the 5.11-rc1 merge.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-backlight')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-backlight | 60 |
1 files changed, 60 insertions, 0 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. |