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>
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Documentation/ABI/testing/sysfs-class-backlight-adp5520
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Documentation/ABI/testing/sysfs-class-backlight-adp5520
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sysfs interface for analog devices adp5520(01) backlight driver
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---------------------------------------------------------------
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The backlight brightness control operates at three different levels for the
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adp5520 and adp5501 devices: daylight (level 1), office (level 2) and dark
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(level 3). By default the brightness operates at the daylight brightness level.
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What: /sys/class/backlight/<backlight>/daylight_max
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What: /sys/class/backlight/<backlight>/office_max
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What: /sys/class/backlight/<backlight>/dark_max
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Date: Sep, 2009
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KernelVersion: v2.6.32
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Contact: Michael Hennerich <michael.hennerich@analog.com>
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Description:
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(RW) Maximum current setting for the backlight when brightness
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is at one of the three levels (daylight, office or dark). This
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is an input code between 0 and 127, which is transformed to a
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value between 0 mA and 30 mA using linear or non-linear
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algorithms.
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What: /sys/class/backlight/<backlight>/daylight_dim
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What: /sys/class/backlight/<backlight>/office_dim
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What: /sys/class/backlight/<backlight>/dark_dim
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Date: Sep, 2009
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KernelVersion: v2.6.32
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Contact: Michael Hennerich <michael.hennerich@analog.com>
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Description:
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(RW) Dim current setting for the backlight when brightness is at
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one of the three levels (daylight, office or dark). This is an
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input code between 0 and 127, which is transformed to a value
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between 0 mA and 30 mA using linear or non-linear algorithms.
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