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1 What: /sys/class/backlight/<backlight>/<ambient light zone>_max
2 What: /sys/class/backlight/<backlight>/l1_daylight_max
3 What: /sys/class/backlight/<backlight>/l2_bright_max
4 What: /sys/class/backlight/<backlight>/l3_office_max
5 What: /sys/class/backlight/<backlight>/l4_indoor_max
6 What: /sys/class/backlight/<backlight>/l5_dark_max
7 Date: May 2011
8 KernelVersion: 3.0
9 Contact: device-drivers-devel@blackfin.uclinux.org
10 Description:
11 Control the maximum brightness for <ambient light zone>
12 on this <backlight>. Values are between 0 and 127. This file
13 will also show the brightness level stored for this
14 <ambient light zone>.
15
16 What: /sys/class/backlight/<backlight>/<ambient light zone>_dim
17 What: /sys/class/backlight/<backlight>/l2_bright_dim
18 What: /sys/class/backlight/<backlight>/l3_office_dim
19 What: /sys/class/backlight/<backlight>/l4_indoor_dim
20 What: /sys/class/backlight/<backlight>/l5_dark_dim
21 Date: May 2011
22 KernelVersion: 3.0
23 Contact: device-drivers-devel@blackfin.uclinux.org
24 Description:
25 Control the dim brightness for <ambient light zone>
26 on this <backlight>. Values are between 0 and 127, typically
27 set to 0. Full off when the backlight is disabled.
28 This file will also show the dim brightness level stored for
29 this <ambient light zone>.
30
31 What: /sys/class/backlight/<backlight>/ambient_light_level
32 Date: May 2011
33 KernelVersion: 3.0
34 Contact: device-drivers-devel@blackfin.uclinux.org
35 Description:
36 Get conversion value of the light sensor.
37 This value is updated every 80 ms (when the light sensor
38 is enabled). Returns integer between 0 (dark) and
39 8000 (max ambient brightness)
40
41 What: /sys/class/backlight/<backlight>/ambient_light_zone
42 Date: May 2011
43 KernelVersion: 3.0
44 Contact: device-drivers-devel@blackfin.uclinux.org
45 Description:
46 Get/Set current ambient light zone. Reading returns
47 integer between 1..5 (1 = daylight, 2 = bright, ..., 5 = dark).
48 Writing a value between 1..5 forces the backlight controller
49 to enter the corresponding ambient light zone.
50 Writing 0 returns to normal/automatic ambient light level
51 operation. The ambient light sensing feature on these devices
52 is an extension to the API documented in
53 Documentation/ABI/stable/sysfs-class-backlight.
54 It can be enabled by writing the value stored in
55 /sys/class/backlight/<backlight>/max_brightness to
56 /sys/class/backlight/<backlight>/brightness.