Add documentation for sysfs interface of adp8860 series backlight devices by reading through code and git commits.
Signed-off-by: Aishwarya Pant aishpant@gmail.com --- .../ABI/testing/sysfs-class-backlight-adp8860 | 54 ++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-adp8860
diff --git a/Documentation/ABI/testing/sysfs-class-backlight-adp8860 b/Documentation/ABI/testing/sysfs-class-backlight-adp8860 new file mode 100644 index 000000000000..54d61c788b1b --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-backlight-adp8860 @@ -0,0 +1,54 @@ +sysfs interface for analog devices adp8860 backlight driver +----------------------------------------------------------- + +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. + +What: /sys/class/backlight/<backlight>/ambient_light_level +Date: Apr, 2010 +KernelVersion: v2.6.35 +Contact: Michael Hennerich michael.hennerich@analog.com +Description: + (RO) 13-bit conversion value for the first light sensor—high + byte (Bit 12 to Bit 8). The value is updated every 80 ms (when + the light sensor is enabled). + + +What: /sys/class/backlight/<backlight>/ambient_light_zone +Date: Apr, 2010 +KernelVersion: v2.6.35 +Contact: Michael Hennerich michael.hennerich@analog.com +Description: + (RW) Read or write the specific level at which the backlight + operates. Value "0" enables automatic ambient light sensing, and + values "1", "2" or "3" set the control to daylight, office or + dark respectively. + + +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.