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

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/80213?usp=email )

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

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

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

BUG=none
TEST=Build karis and try warm reboot from OS console. Check the DUT
with WD SSD boots to OS again.

Change-Id: I24a702f02278355c4f2137f0d05c8a9da7cb3c1c
Signed-off-by: Tyler Wang 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80213
Reviewed-by: Kapil Porwal 
Reviewed-by: Subrata Banik 
Tested-by: build bot (Jenkins) 
---
M src/mainboard/google/rex/variants/karis/gpio.c
1 file changed, 8 insertions(+), 3 deletions(-)

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

diff --git a/src/mainboard/google/rex/variants/karis/gpio.c b/src/mainboard/google/rex/variants/karis/gpio.c
index 69921a8..8c0f929 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),

@@ -404,6 +406,9 @@
 };

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 */