[coreboot-gerrit] Change in coreboot[master]: mb/google/octopus/variants/bobba: Disable XHCI LFPS power management

[Sheng-Liang Pan (Code Review)]

Hello Marx Wang, build bot (Jenkins), Patrick Georgi, Henry Sun, Marco Chen,

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

https://review.coreboot.org/c/coreboot/+/40303

to look at the new patch set (#7).

Change subject: mb/google/octopus/variants/bobba: Disable XHCI LFPS power management
......................................................................

mb/google/octopus/variants/bobba: Disable XHCI LFPS power management

LTE module 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.

Disable XHCI LFPS power management.
If the 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:146768983
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"

Signed-off-by: Pan Sheng-Liang 
Change-Id: Ib8e5ae79e097debf0c75ead232ddbb2baced2a2a
---
M src/mainboard/google/octopus/variants/bobba/overridetree.cb
M src/mainboard/google/octopus/variants/bobba/variant.c
2 files changed, 27 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/03/40303/7