mb/google/rex: Add GPIO stubs
Add stubbed out GPIO configuration and perform GPIO initialization
during bootblock, romstage and ramstage.
BUG=b:224325352
TEST=util/abuild/abuild -p none -t google/rex -a -c max
Signed-off-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Change-Id: I51426f9557dafc357fc54a971b6f76fac5323e0a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64593
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index b9388a3..1c9ed23 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -31,4 +31,8 @@
config MAINBOARD_PART_NUMBER
default "Rex" if BOARD_GOOGLE_REX0
+config VARIANT_DIR
+ string
+ default "rex0" if BOARD_GOOGLE_REX0
+
endif # BOARD_GOOGLE_REX_COMMON