sysfs interface for analog devices adp8860 backlight driver
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The backlight brightness control operates at three different levels for the
adp8860, adp8861 and adp8863 devices: daylight (level 1), office (level 2) and
dark (level 3). By default the brightness operates at the daylight brightness
level.

See also /sys/class/backlight/<backlight>/ambient_light_level and
/sys/class/backlight/<backlight>/ambient_light_zone.


What:		/sys/class/backlight/<backlight>/l1_daylight_max
What:		/sys/class/backlight/<backlight>/l2_office_max
What:		/sys/class/backlight/<backlight>/l3_dark_max
Date:		Apr, 2010
KernelVersion:	v2.6.35
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>/l1_daylight_dim
What:		/sys/class/backlight/<backlight>/l2_office_dim
What:		/sys/class/backlight/<backlight>/l3_dark_dim
Date:		Apr, 2010
KernelVersion:	v2.6.35
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.