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This patch adds the support for the configuration of the keyboard backlight on supported Dell laptops. With this patch it is possible to set: * keyboard backlight level * timeout after which the backlight will be automatically turned off * input activity triggers (keyboard, touchpad, mouse) that enable the backlight * ambient light settings The settings are exposed via /sys/class/leds/dell::kbd_backlight/ The code is based on the newly released documentation by Dell in the libsmbios project. Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Gabriele Mazzotta <gabriele.mzt@gmail.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Darren Hart <dvhart@linux.intel.com>
70 lines
2.6 KiB
Plaintext
70 lines
2.6 KiB
Plaintext
What: /sys/class/leds/dell::kbd_backlight/als_enabled
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Date: December 2014
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KernelVersion: 3.19
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Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
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Pali Rohár <pali.rohar@gmail.com>
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Description:
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This file allows to control the automatic keyboard
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illumination mode on some systems that have an ambient
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light sensor. Write 1 to this file to enable the auto
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mode, 0 to disable it.
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What: /sys/class/leds/dell::kbd_backlight/als_setting
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Date: December 2014
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KernelVersion: 3.19
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Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
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Pali Rohár <pali.rohar@gmail.com>
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Description:
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This file allows to specifiy the on/off threshold value,
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as reported by the ambient light sensor.
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What: /sys/class/leds/dell::kbd_backlight/start_triggers
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Date: December 2014
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KernelVersion: 3.19
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Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
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Pali Rohár <pali.rohar@gmail.com>
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Description:
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This file allows to control the input triggers that
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turn on the keyboard backlight illumination that is
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disabled because of inactivity.
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Read the file to see the triggers available. The ones
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enabled are preceded by '+', those disabled by '-'.
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To enable a trigger, write its name preceded by '+' to
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this file. To disable a trigger, write its name preceded
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by '-' instead.
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For example, to enable the keyboard as trigger run:
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echo +keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
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To disable it:
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echo -keyboard > /sys/class/leds/dell::kbd_backlight/start_triggers
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Note that not all the available triggers can be configured.
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What: /sys/class/leds/dell::kbd_backlight/stop_timeout
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Date: December 2014
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KernelVersion: 3.19
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Contact: Gabriele Mazzotta <gabriele.mzt@gmail.com>,
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Pali Rohár <pali.rohar@gmail.com>
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Description:
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This file allows to specify the interval after which the
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keyboard illumination is disabled because of inactivity.
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The timeouts are expressed in seconds, minutes, hours and
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days, for which the symbols are 's', 'm', 'h' and 'd'
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respectively.
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To configure the timeout, write to this file a value along
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with any the above units. If no unit is specified, the value
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is assumed to be expressed in seconds.
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For example, to set the timeout to 10 minutes run:
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echo 10m > /sys/class/leds/dell::kbd_backlight/stop_timeout
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Note that when this file is read, the returned value might be
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expressed in a different unit than the one used when the timeout
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was set.
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Also note that only some timeouts are supported and that
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some systems might fall back to a specific timeout in case
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an invalid timeout is written to this file.
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