[S] Change in coreboot[main]: [Test] mb/google/rex/var/karis: Toggle NVMe PWR pin to reset SSD

[Tyler Wang (Code Review)]

Attention is currently required from: Dinesh Gehlot, Eran Mitrani, Jakub Czapiga, Kapil Porwal, Subrata Banik, Tarun.

Tyler Wang has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/80213?usp=email )

Change subject: [Test] mb/google/rex/var/karis: Toggle NVMe PWR pin to reset SSD
......................................................................

[Test] mb/google/rex/var/karis: Toggle NVMe PWR pin to reset SSD

Follow reference design rex0, tggles NVMe PWR pin as soon as in early
stage to make NVMe ready sooner.

BUG=none
TEST=none

Change-Id: I24a702f02278355c4f2137f0d05c8a9da7cb3c1c
Signed-off-by: Tyler Wang 
---
M src/mainboard/google/rex/variants/karis/gpio.c
1 file changed, 8 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/13/80213/1

diff --git a/src/mainboard/google/rex/variants/karis/gpio.c b/src/mainboard/google/rex/variants/karis/gpio.c
index 9ecc45d..6bd23ca 100644
--- a/src/mainboard/google/rex/variants/karis/gpio.c
+++ b/src/mainboard/google/rex/variants/karis/gpio.c
@@ -367,6 +367,11 @@

/* Early pad configuration in bootblock */
 static const struct pad_config early_gpio_table[] = {
+	/* GPP_A19 : [] ==> EN_PP3300_SSD */
+	PAD_CFG_GPO(GPP_A19, 0, DEEP),
+	/* GPP_A20 : [] ==> SSD_PERST_L */
+	PAD_CFG_GPO(GPP_A20, 1, DEEP),
+
    /* GPP_B16 : [] ==> SOC_HDMI_HPD_L */
    PAD_CFG_NF(GPP_B16, NONE, DEEP, NF2),
    /* GPP_B18 : [] ==> SOC_I2C_TPM_SDA */
@@ -393,9 +398,6 @@
    /* GPP_E13 :  [] ==> MEM_CH_SEL */
    PAD_CFG_GPI(GPP_E13, NONE, DEEP),

-	/* GPP_A20 : [] ==> SSD_PERST_L */
-	PAD_CFG_GPO(GPP_A20, 0, DEEP),
-
    /* GPP_H10 : [] ==> SOC_WP_OD */
    PAD_CFG_GPI_GPIO_DRIVER_LOCK(GPP_H10, NONE, LOCK_CONFIG),

@@ -406,6 +408,9 @@
 };

static const struct pad_config romstage_gpio_table[] = {
+	/* GPP_A19 : [] ==> EN_PP3300_SSD */
+	PAD_CFG_GPO(GPP_A19, 1, DEEP),
+
    /* GPP_B11 : [] ==> EN_FP_PWR */
    PAD_CFG_GPO(GPP_B11, 0, DEEP),
    /* A20 : [] ==> SSD_PERST_L */