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    Subject[PATCH 4/5] 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>
    ---
    .../ABI/testing/sysfs-class-backlight-adp5520 | 31 ++++++++++++++++++++++
    1 file changed, 31 insertions(+)
    create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp5520

    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.
    --
    2.16.1
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