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mb/google/rex: Do not power on FPMCU in ramstage 

When 'reset_gpio' and 'enable_gpio' properties are defined in
overridetree.cb, the kernel will power on the FPMCU. If the device was
previously enabled the kernel will reset it.

To avoid situation in which the FPMCU is powered on and reset later we
leave the FPMCU powered off in coreboot and started by the kernel. This
is exactly what other boards do (e.g. brya).

TEST=Boot the board (e.g. karis) and make sure the FPMCU was booted once
     (e.g. examine FPMCU console logs)

Change-Id: I5df8d9385be2621c02ccee2d36511a4e80ab87d1
Signed-off-by: Patryk Duda <patrykd@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80457
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: YH Lin <yueherngl@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Patryk Duda 2024-02-13 16:28:40 +01:00 committed by Subrata Banik
parent f33a7f71c3
commit dea474624d
3 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/mainboard/google/rex/variants/karis/gpio.c
View File

@ -69,7 +69,7 @@ static const struct pad_config gpio_table[] = {
/* GPP_B10 : [] ==> WIFI_DISABLE_L */
PAD_CFG_GPO(GPP_B10, 1, DEEP),
/* GPP_B11 : [] ==> EN_FP_PWR */
PAD_CFG_GPO_LOCK(GPP_B11, 1, LOCK_CONFIG),
PAD_CFG_GPO_LOCK(GPP_B11, 0, LOCK_CONFIG),
/* GPP_B12 : [] ==> SLP_SO_R_L */
PAD_CFG_NF(GPP_B12, NONE, DEEP, NF1),
/* GPP_B13 : [] ==> PLT_RST_L */
@ -140,7 +140,7 @@ static const struct pad_config gpio_table[] = {
/* GPP_C22 : [] ==> SOC_FP_BOOT0 */
PAD_CFG_GPO_LOCK(GPP_C22, 0, LOCK_CONFIG),
/* GPP_C23 : [] ==> FP_RST_ODL */
PAD_CFG_GPO_LOCK(GPP_C23, 1, LOCK_CONFIG),
PAD_CFG_GPO_LOCK(GPP_C23, 0, LOCK_CONFIG),
/* GPP_D00 : Not connected. */
PAD_NC(GPP_D00, NONE),

4
src/mainboard/google/rex/variants/rex0/gpio.c
View File

@ -76,7 +76,7 @@ static const struct pad_config gpio_table[] = {
/* GPP_B10 : [] ==> WIFI_DISABLE_L */
PAD_CFG_GPO(GPP_B10, 1, DEEP),
/* GPP_B11 : [] ==> EN_FP_PWR */
PAD_CFG_GPO_LOCK(GPP_B11, 1, LOCK_CONFIG),
PAD_CFG_GPO_LOCK(GPP_B11, 0, LOCK_CONFIG),
/* GPP_B12 : [] ==> SLP_SO_R_L */
PAD_CFG_NF(GPP_B12, NONE, DEEP, NF1),
/* GPP_B13 : [] ==> PLT_RST_L */
@ -145,7 +145,7 @@ static const struct pad_config gpio_table[] = {
/* GPP_C22 : [] ==> SOC_FP_BOOT0 */
PAD_CFG_GPO_LOCK(GPP_C22, 0, LOCK_CONFIG),
/* GPP_C23 : [] ==> FP_RST_ODL */
PAD_CFG_GPO_LOCK(GPP_C23, 1, LOCK_CONFIG),
PAD_CFG_GPO_LOCK(GPP_C23, 0, LOCK_CONFIG),
/* GPP_D00 : WCAM_MCLK_R */
PAD_CFG_NF(GPP_D00, NONE, DEEP, NF1),

4
src/mainboard/google/rex/variants/screebo/gpio.c
View File

@ -64,7 +64,7 @@ static const struct pad_config gpio_table[] = {
/* GPP_B07 : [] ==> EN_SPKR */
PAD_CFG_GPO(GPP_B07, 1, DEEP),
/* GPP_B08 : [] ==> EN_FP_PWR */
PAD_CFG_GPO_LOCK(GPP_B08, 1, LOCK_CONFIG),
PAD_CFG_GPO_LOCK(GPP_B08, 0, LOCK_CONFIG),
/* GPP_B09 : net NC is not present in the given design */
PAD_NC(GPP_B09, NONE),
/* GPP_B10 : [] ==> WIFI_DISABLE_L */
@ -138,7 +138,7 @@ static const struct pad_config gpio_table[] = {
/* GPP_C20 : [] ==> SOC_FP_BOOT0 */
PAD_CFG_GPO_LOCK(GPP_C20, 0, LOCK_CONFIG),
/* GPP_C21 : [] ==> FP_RST_ODL */
PAD_CFG_GPO_LOCK(GPP_C21, 1, LOCK_CONFIG),
PAD_CFG_GPO_LOCK(GPP_C21, 0, LOCK_CONFIG),
/* GPP_C22 : [] ==> USB_C1_LSX_TX */
PAD_CFG_NF(GPP_C22, NONE, DEEP, NF1),
/* GPP_C23 : [] ==> USB_C1_LSX_RX */