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backlight: lm3639: document sysfs attributes

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Add documentation for sysfs interfaces of Texas Instruments lm3639
backlight + flash led driver chip by looking through git commits and
reading code.

Signed-off-by: Aishwarya Pant <aishpant@gmail.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Aishwarya Pant 2018-02-06 13:09:42 +05:30 committed by Jonathan Corbet
parent 2d39f681bc
commit 24f4c6c890
1 changed files with 11 additions and 0 deletions
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Documentation/ABI/testing/sysfs-class-backlight-lm3639 Normal file
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sysfs interface for Texas Instruments lm3639 backlight + flash led driver chip
------------------------------------------------------------------------------
What: /sys/class/backlight/<backlight>/bled_mode
Date: Oct, 2012
KernelVersion: v3.10
Contact: dri-devel@lists.freedesktop.org
Description:
(WO) Write to the backlight mapping mode. The backlight current
can be mapped for either exponential (value "0") or linear
mapping modes (default).