[M] Change in coreboot[master]: mb/google/poppy: Implement touchscreen,digitizer power sequencing

[Matt DeVillier (Code Review)]

Matt DeVillier has uploaded a new patch set (#2). ( https://review.coreboot.org/c/coreboot/+/70919 )

Change subject: mb/google/poppy: Implement touchscreen,digitizer power sequencing
......................................................................

mb/google/poppy: Implement touchscreen,digitizer power sequencing

For touchscreens/digitizers on poppy variants, drive the enable
GPIO high and hold in reset in romstage, then release from reset in
ramstage. This will allow coreboot to detect the presence of i2c
touchscreens/digitizers during ACPI SSDT generation (enabled in a
subsequent commit).

TEST=tested with the rest of patch train

Change-Id: I90ac4f09c343a28328f7d30254f0448cbe0c78b3
Signed-off-by: Matt DeVillier 
---
M src/mainboard/google/poppy/variants/atlas/gpio.c
M src/mainboard/google/poppy/variants/baseboard/gpio.c
M src/mainboard/google/poppy/variants/nami/gpio.c
M src/mainboard/google/poppy/variants/nautilus/gpio.c
M src/mainboard/google/poppy/variants/nocturne/gpio.c
M src/mainboard/google/poppy/variants/rammus/gpio.c
M src/mainboard/google/poppy/variants/soraka/gpio.c
7 files changed, 93 insertions(+), 17 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/70919/2