mb/google/rex0: Restore SSD power sequencing GPIOs in ramstage
This change restores the EN_PP3300_SSD GPIO configuration in the
ramstage for the Rex0 variant. This is necessary to enable testing
of RO lockdown scenarios on FSI'ed Screbo devices, where bootblock
changes are not applicable.
Additionally, ensures locking the GPIO PAD from getting misconfigured
after booting to OS.
BUG=b/337971452
BRANCH=firmware-rex-15709.B
TEST=Able to boot google/rex with RO locked to an older version without
SSD GPIO refactored, and RW is with the latest revision.
Change-Id: Ia7564b14a20d00e9bb2c9466b7a737dd97f01351
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82909
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
diff --git a/src/mainboard/google/rex/variants/rex0/gpio.c b/src/mainboard/google/rex/variants/rex0/gpio.c
index 9d8f9ff..d492bd1 100644
--- a/src/mainboard/google/rex/variants/rex0/gpio.c
+++ b/src/mainboard/google/rex/variants/rex0/gpio.c
@@ -45,6 +45,8 @@
/* GPP_A18 : [] ==> CAM_PSW_L */
PAD_CFG_GPI_INT_LOCK(GPP_A18, NONE, EDGE_BOTH, LOCK_CONFIG),
+ /* GPP_A19 : [] ==> EN_PP3300_SSD */
+ PAD_CFG_GPO_LOCK(GPP_A19, 1, LOCK_CONFIG),
/* GPP_A21 : [] ==> WWAN_CONFIG2 */
PAD_CFG_GPI(GPP_A21, NONE, DEEP),