tree 8f255ff32c22a294249dd0195f2cb8f1f01953b7
parent 60a68295b817a40fd42af2f3c3de118bab97feee
author Evgeny Sorokin <me@ch1p.io> 1707525161 +0300
committer Felix Singer <service+coreboot-gerrit@felixsinger.de> 1707743012 +0000

ec/lenovo/h8/acpi: Support pulsing LEDLOGO on Haswell ThinkPads

The name LEDLOGO comes from schematics. It's the red indicator, embedded
in the dot of the 'i' of the ThinkPad logo on laptop's lid.

In vendor firmware, this led starts fading in-and-out, or, in other
words, pulsing, when laptop is put to S3. It helps to determine whether
the laptop is in S3 just by taking a look at the logo.

As of now, coreboot doesn't do anything with this particular indicator,
it's always in enabled (on) state, which is not very convenient.

This patch fixes it.

Tested on T440p.

Change-Id: I85fb69c8c1bed8635a1b31e9b8385c7036bb46dd
Signed-off-by: Evgeny Zinoviev <me@ch1p.io>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80437
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Nicholas Chin <nic.c3.14@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>