[S] Change in coreboot[main]: soc/intel/common/gpio: add function to lock GPIO configuration

[Cliff Huang (Code Review)]

Attention is currently required from: Bora Guvendik, Cliff Huang, Jérémy Compostella.

Hello Bora Guvendik, Jérémy Compostella, Wonkyu Kim, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/84901?usp=email

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

Change subject: soc/intel/common/gpio: add function to lock GPIO configuration
......................................................................

soc/intel/common/gpio: add function to lock GPIO configuration

gpio_padbased_lock_override() takes the MB gpio table and configuration
exception gpio list as arguments. MB gpio needs to provide the lock
exception list or use none for the list. This function should be called
after MB gpio table is overridden with GPIO fw_config tables.

NOTE: The SOC gpio structure does not distinguish GPP_[n] and non
GPP_[n] pads. Therefore, we only apply lock on pads in the MB gpio
table. In additon, this won't lock the TX output, which is set via
different registers.

BUG=none
TEST=This cannot be tested directly and requires MB gpio.c and
mainboard.c changes to use this added function.

Signed-off-by: Cliff Huang 
Change-Id: Iabe4e4b1d282a5f6cae8f330100c9139e0c2691d
---
M src/soc/intel/common/block/gpio/gpio.c
M src/soc/intel/common/block/include/intelblocks/gpio.h
2 files changed, 23 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/01/84901/3