[coreboot-gerrit] Change in coreboot[master]: mb/google/brya/var/gimble: Decrease touchscreen T3 timing to 200ms

[Scott Chao (Code Review)]

Attention is currently required from: Paul Menzel, Nick Vaccaro, Scott Chao.
Hello build bot (Jenkins), Tim Wawrzynczak, Nick Vaccaro,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/60270

to look at the new patch set (#3).

Change subject: mb/google/brya/var/gimble: Decrease touchscreen T3 timing to 200ms
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mb/google/brya/var/gimble: Decrease touchscreen T3 timing to 200ms

We set T3 as 300ms to meet Elan's spec, but the resume/suspend times are greater than 500ms, which is the spec for Chromebooks. The actual kernel timing has been measured, and given the ACPI delay after deasserting reset in addition to
the delay until the kernel driver accesses the device, delaying
only 200ms in the ACPI method is also sufficient to meet the 300ms
requirement.

BUG=b:210772498
BRANCH=none
TEST=build and test touchscreen function on DUT.
TEST=suspend, wake DUT and check touchscreen function.

Signed-off-by: Scott Chao 
Change-Id: I4bb4eda09686cb59b6e19c741aa2b78d84332d2a
---
M src/mainboard/google/brya/variants/gimble/overridetree.cb
M src/mainboard/google/brya/variants/gimble4es/overridetree.cb
2 files changed, 2 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/70/60270/3