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mb/lenovo/t420: Add support for ThinkLight 

With this patch, the ThinkLight on the ThinkPad T420 can be controlled
through the OS.  The same change was done for the ThinkPad X200 in
b45912f4: mb/lenovo/x200: Add support for ThinkLight

After applying this patch, the light can be controlled like this:

    echo on >/proc/acpi/ibm/light
    echo off >/proc/acpi/ibm/light

Or through sysfs at /sys/class/leds/tpacpi::thinklight

Unfortunately I do not own a T420 to test this.

Change-Id: I4f9a9937a45995b72a9712919316e95bb8f82f45
Signed-off-by: Stefan Ott <stefan@ott.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40714
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Stefan Ott 2020-04-22 23:20:03 +02:00 committed by Alexander Couzens
parent 6107064d66
commit b29b22888d
1 changed files with 1 additions and 0 deletions
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src/mainboard/lenovo/t420/dsdt.asl
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@ -35,4 +35,5 @@ DefinitionBlock(
} }
#include <southbridge/intel/common/acpi/sleepstates.asl> #include <southbridge/intel/common/acpi/sleepstates.asl>
#include <ec/lenovo/h8/acpi/thinklight.asl>
} }