[M] Change in coreboot[main]: mb/google/rex: Add Intel Touch for controller 1 for Rex

[Cliff Huang (Code Review)]

Attention is currently required from: Cliff Huang, Dinesh Gehlot, Eran Mitrani, Jakub Czapiga, Jingyuan Liang, Kapil Porwal, Kyoung Il Kim, Paul Menzel, Subrata Banik, Tarun.

Hello Dinesh Gehlot, Eran Mitrani, Jakub Czapiga, Jingyuan Liang, Kapil Porwal, Kyoung Il Kim, Subrata Banik, Tarun, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/81333?usp=email

to look at the new patch set (#5).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: mb/google/rex: Add Intel Touch for controller 1 for Rex
......................................................................

mb/google/rex: Add Intel Touch for controller 1 for Rex

This patch enables THC1 support for Rex according to the corresponding
CBI fw_config. The change includes the GPIO pad configuration and
adding ACPI entries in SSDT for ELAN touch device.
THC0 is also enabled when THC1 is enabled due to the design constraint.

NOTE for Rework info:
- Major rework is required when using THC1 with Rex P1 and P2.
Minor rework is needed for EVT.

- Rex with THC rework won't be able to support UWB and FPCMU as the
original board does. And their CBI fw_config shouled be disabled
to avoid conflict with THC1.

- The resistor on the THC1 THC-SPI MISO pin should be 100 Ohm.

NOTE for downstream device:
- The ELAN touch device interface must be converted from I2C to SPI prior
 to use.

BUG=b:307775082

TEST=set CBI TOUCHSREEN fw_config to TOUCHSCREEN_THC, FP fw_config to
FP_ABSENT, and UWB fw_config to UWB_ABSENT. boot Rex to OS and run
lspci to check THC device and check that THC device driver
initialization successfully.
/sys/class/hidraw/hidraw0/device/input/ should have several
inputs enumerated.

Signed-off-by: Cliff Huang 
Change-Id: Id89b5b46d67b90491410d3d08c1a3ae9549b4da5
---
M src/mainboard/google/rex/Kconfig
M src/mainboard/google/rex/variants/rex0/fw_config.c
M src/mainboard/google/rex/variants/rex0/overridetree.cb
3 files changed, 163 insertions(+), 9 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/81333/5