[XS] Change in coreboot[main]: mb/google/fatcat/var/francka: Adjust NVMe SSD power sequence

[Matt DeVillier (Code Review)]

Matt DeVillier has submitted this change. ( https://review.coreboot.org/c/coreboot/+/86593?usp=email )

Change subject: mb/google/fatcat/var/francka: Adjust NVMe SSD power sequence
......................................................................

mb/google/fatcat/var/francka: Adjust NVMe SSD power sequence

Move SSD enable/reset pins to romstage to have more time for initialization.

BUG=b:398070426
BRANCH=None
TEST=Build francka and do EC reset to check the SSD boots to OS successfully

Change-Id: I468ba34a54046ef6ed3d5ec4c625a87bb5255640
Signed-off-by: Frank Wu 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86593
Reviewed-by: Ian Feng 
Reviewed-by: Kapil Porwal 
Reviewed-by: Dtrain Hsu 
Reviewed-by: Subrata Banik 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/google/fatcat/variants/francka/gpio.c
1 file changed, 4 insertions(+), 0 deletions(-)

Approvals:
  Kapil Porwal: Looks good to me, approved
  build bot (Jenkins): Verified
  Ian Feng: Looks good to me, approved
  Dtrain Hsu: Looks good to me, approved
  Subrata Banik: Looks good to me, approved

diff --git a/src/mainboard/google/fatcat/variants/francka/gpio.c b/src/mainboard/google/fatcat/variants/francka/gpio.c
index 6265b16..f2868fc 100644
--- a/src/mainboard/google/fatcat/variants/francka/gpio.c
+++ b/src/mainboard/google/fatcat/variants/francka/gpio.c
@@ -416,6 +416,8 @@

/* Pad configuration in romstage */
 static const struct pad_config romstage_gpio_table[] = {
+	/* GPP_B16:     SOC_SSD2_EN */
+	PAD_CFG_GPO(GPP_B16, 1, PLTRST),
    /* GPP_C00:     SOC_SMBCLK */
    PAD_CFG_NF(GPP_C00, NONE, DEEP, NF1),
    /* GPP_C01:     SOC_SMBDATA */
@@ -424,6 +426,8 @@
    PAD_CFG_GPO(GPP_H03, 0, DEEP),
    /* GPP_H17:     FP_RST_1V8_OD# */
    PAD_CFG_GPO(GPP_H17, 0, DEEP),
+	/* GPP_E03:     SOC_SSD2_RST# */
+	PAD_CFG_GPO(GPP_E03, 1, PLTRST),
 };

const struct pad_config *variant_gpio_table(size_t *num)