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Diffstat (limited to 'Documentation/ABI/testing/sysfs-platform-dell-laptop')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform-dell-laptop | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-dell-laptop b/Documentation/ABI/testing/sysfs-platform-dell-laptop new file mode 100644 index 000000000000..8c6a0b8e1131 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-dell-laptop @@ -0,0 +1,69 @@ +What: /sys/class/leds/dell::kbd_backlight/als_enabled +Date: December 2014 +KernelVersion: 3.19 +Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, + Pali Rohár <pali.rohar@gmail.com> +Description: + This file allows to control the automatic keyboard + illumination mode on some systems that have an ambient + light sensor. Write 1 to this file to enable the auto + mode, 0 to disable it. + +What: /sys/class/leds/dell::kbd_backlight/als_setting +Date: December 2014 +KernelVersion: 3.19 +Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, + Pali Rohár <pali.rohar@gmail.com> +Description: + This file allows to specifiy the on/off threshold value, + as reported by the ambient light sensor. + +What: /sys/class/leds/dell::kbd_backlight/start_triggers +Date: December 2014 +KernelVersion: 3.19 +Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, + Pali Rohár <pali.rohar@gmail.com> +Description: + This file allows to control the input triggers that + turn on the keyboard backlight illumination that is + disabled because of inactivity. + Read the file to see the triggers available. The ones + enabled are preceded by '+', those disabled by '-'. + + To enable a trigger, write its name preceded by '+' to + this file. To disable a trigger, write its name preceded + by '-' instead. + + For example, to enable the keyboard as trigger run: + echo +keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers + To disable it: + echo -keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers + + Note that not all the available triggers can be configured. + +What: /sys/class/leds/dell::kbd_backlight/stop_timeout +Date: December 2014 +KernelVersion: 3.19 +Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>, + Pali Rohár <pali.rohar@gmail.com> +Description: + This file allows to specify the interval after which the + keyboard illumination is disabled because of inactivity. + The timeouts are expressed in seconds, minutes, hours and + days, for which the symbols are 's', 'm', 'h' and 'd' + respectively. + + To configure the timeout, write to this file a value along + with any the above units. If no unit is specified, the value + is assumed to be expressed in seconds. + + For example, to set the timeout to 10 minutes run: + echo 10m > /sys/class/leds/dell::kbd_backlight/stop_timeout + + Note that when this file is read, the returned value might be + expressed in a different unit than the one used when the timeout + was set. + + Also note that only some timeouts are supported and that + some systems might fall back to a specific timeout in case + an invalid timeout is written to this file. |