[coreboot-gerrit] Change in coreboot[master]: mb/google/octopus/var/garg: Disable XHCI LFPS power management by sku

[Kevin Chiu (Code Review)]

Hello build bot (Jenkins), Martin Roth, Henry Sun, Justin TerAvest, Marco Chen, Keith Tzeng, Karthik Ramasubramanian,

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

https://review.coreboot.org/c/coreboot/+/46701

to look at the new patch set (#2).

Change subject: mb/google/octopus/var/garg: Disable XHCI LFPS power management by sku
......................................................................

mb/google/octopus/var/garg: Disable XHCI LFPS power management by sku

LTE module Fibocom L850-GL is lost after idle overnight,
with this workaround, host will not initiate U3 wakeup
at the same time with device, which will avoid the race condition.

If this option is set in the devicetree, the bits[7:4] in XHCI MMIO BAR +
offset 0x80A4 (PMCTRL_REG) will be updated from default 9 to 0.

BUG=b:171478764
BRANCH=octopus
TEST=build coreboot with DisableXhciLfpsPM being set to 1 and flash
     the image to the device. Run following command to check if
     bits[7:4] is set 0:
     >iotools mmio_read32 "XHCI MMIO BAR + 0x80A4"

Change-Id: I213fed2b56f216747b2727b69f97d46d8c0c872e
Signed-off-by: Kevin Chiu 
---
M src/mainboard/google/octopus/variants/garg/overridetree.cb
M src/mainboard/google/octopus/variants/garg/variant.c
2 files changed, 20 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/01/46701/2