Raul Rangel has uploaded a new patch set (#2). ( https://review.coreboot.org/c/coreboot/+/52955 )
Change subject: mb/google/guybrush: Switch eSPI ALERT# to in-band ......................................................................
mb/google/guybrush: Switch eSPI ALERT# to in-band
Using the push-pull alert was causing leakages when in S0i3. This is because the EC drives ALERT#, so when the AP enters S0i3, the extra current leaks into the SoC and ends up turning on the power regulators. By using in-band ALERT#, the EC no longer drives this pin high, thus fixing the leak. We could also have used an open drain alert, but the rise time is less than ideal.
BUG=b:187122344, b:186135022 TEST=Measure S0i3 power on guybrush and validate it's no longer high.
Signed-off-by: Raul E Rangel rrangel@chromium.org Change-Id: I6de771aeda8feca062652f0ea9eb57d31cb68562 --- M src/mainboard/google/guybrush/variants/baseboard/devicetree.cb 1 file changed, 1 insertion(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/55/52955/2