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| author | Aishwarya Pant <aishpant@gmail.com> | 2018-02-06 13:10:26 +0530 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2018-02-23 08:21:13 -0700 |
| commit | 9671a7f1319a793c5dc728f29f5a62c564f806ea (patch) | |
| tree | f198d17cd267eb25dd31841112d37a76808b5e4f /Documentation | |
| parent | 24f4c6c890e69fa805cfc3112b3c7bfe75a88805 (diff) | |
| download | linux-9671a7f1319a793c5dc728f29f5a62c564f806ea.tar.gz linux-9671a7f1319a793c5dc728f29f5a62c564f806ea.tar.bz2 linux-9671a7f1319a793c5dc728f29f5a62c564f806ea.zip | |
backlight: adp5520: document sysfs attributes
Add documentation for sysfs interface of adp5520/adp5501 analog devices
backlight driver by reading code and looking through git commit logs.
Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-backlight-adp5520 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-backlight-adp5520 b/Documentation/ABI/testing/sysfs-class-backlight-adp5520 new file mode 100644 index 000000000000..34b6ebafa210 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-backlight-adp5520 @@ -0,0 +1,31 @@ +sysfs interface for analog devices adp5520(01) backlight driver +--------------------------------------------------------------- + +The backlight brightness control operates at three different levels for the +adp5520 and adp5501 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>/daylight_max +What: /sys/class/backlight/<backlight>/office_max +What: /sys/class/backlight/<backlight>/dark_max +Date: Sep, 2009 +KernelVersion: v2.6.32 +Contact: Michael Hennerich <michael.hennerich@analog.com> +Description: + (RW) Maximum current setting for the backlight when brightness + is at one of the three levels (daylight, office or dark). This + is an input code between 0 and 127, which is transformed to a + value between 0 mA and 30 mA using linear or non-linear + algorithms. + +What: /sys/class/backlight/<backlight>/daylight_dim +What: /sys/class/backlight/<backlight>/office_dim +What: /sys/class/backlight/<backlight>/dark_dim +Date: Sep, 2009 +KernelVersion: v2.6.32 +Contact: Michael Hennerich <michael.hennerich@analog.com> +Description: + (RW) Dim current setting for the backlight when brightness is at + one of the three levels (daylight, office or dark). This is an + input code between 0 and 127, which is transformed to a value + between 0 mA and 30 mA using linear or non-linear algorithms. |