mb/google/glados: do UART pad configuration at board-level

UART pad configuration should not be done in common code, because that
may cause short circuits, when the user sets a wrong UART index. Thus,
add the corresponding pads to the early gpio table for the board as a
first step. Common UART pad config code then gets dropped in CB:48829.

Also switch to `bootblock_mainboard_early_init` to configure the pads in
early bootblock before console initialization, to make the console work
as early as possible. The board does not do any other gpio configuration
in bootblock, so this should not influence behaviour in a negative way
(e.g. breaking overrides).

Change-Id: I6fedcebea3bb31d992bac1e3b21382fea93a8b82
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49429
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

7 files changed, 14 insertions, 0 deletions

diff --git a/src/mainboard/google/glados/variants/asuka/include/variant/gpio.h b/src/mainboard/google/glados/variants/asuka/include/variant/gpio.h
index b4c65baa90..17c24a2ed7 100644
--- a/src/mainboard/google/glados/variants/asuka/include/variant/gpio.h
+++ b/src/mainboard/google/glados/variants/asuka/include/variant/gpio.h
@@ -217,6 +217,8 @@ static const struct pad_config gpio_table[] = {
 /* Early pad configuration in romstage. */
 static const struct pad_config early_gpio_table[] = {
 /* SPI_WP_STATUS */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, UP_20K, DEEP),
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
 };
 
 #endif
diff --git a/src/mainboard/google/glados/variants/caroline/include/variant/gpio.h b/src/mainboard/google/glados/variants/caroline/include/variant/gpio.h
index 24e7b33cc2..f570006180 100644
--- a/src/mainboard/google/glados/variants/caroline/include/variant/gpio.h
+++ b/src/mainboard/google/glados/variants/caroline/include/variant/gpio.h
@@ -234,6 +234,8 @@ static const struct pad_config gpio_table[] = {
 /* Early pad configuration in romstage. */
 static const struct pad_config early_gpio_table[] = {
 /* UART2_CTS# */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, UP_20K, DEEP), /* PCH_WP */
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
 };
 
 #endif
diff --git a/src/mainboard/google/glados/variants/cave/include/variant/gpio.h b/src/mainboard/google/glados/variants/cave/include/variant/gpio.h
index 7d000f5d6e..45e1f67531 100644
--- a/src/mainboard/google/glados/variants/cave/include/variant/gpio.h
+++ b/src/mainboard/google/glados/variants/cave/include/variant/gpio.h
@@ -226,6 +226,8 @@ static const struct pad_config gpio_table[] = {
 /* Early pad configuration in romstage. */
 static const struct pad_config early_gpio_table[] = {
 /* UART2_CTS# */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, UP_20K, DEEP), /* PCH_WP */
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
 };
 
 #endif
diff --git a/src/mainboard/google/glados/variants/chell/include/variant/gpio.h b/src/mainboard/google/glados/variants/chell/include/variant/gpio.h
index 6d415ca30a..1c92e51df9 100644
--- a/src/mainboard/google/glados/variants/chell/include/variant/gpio.h
+++ b/src/mainboard/google/glados/variants/chell/include/variant/gpio.h
@@ -222,6 +222,8 @@ static const struct pad_config early_gpio_table[] = {
 /* SRCCLKREQ2# */	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1), /* KEPLER */
 /* UART0_CTS# */	PAD_CFG_GPO(GPP_C11, 0, DEEP), /* EN_PP3300_KEPLER */
 /* UART2_CTS# */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, UP_20K, DEEP), /* PCH_WP */
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
 };
 
 #endif
diff --git a/src/mainboard/google/glados/variants/glados/include/variant/gpio.h b/src/mainboard/google/glados/variants/glados/include/variant/gpio.h
index 9ee00d2cf9..a7bcdd7435 100644
--- a/src/mainboard/google/glados/variants/glados/include/variant/gpio.h
+++ b/src/mainboard/google/glados/variants/glados/include/variant/gpio.h
@@ -224,6 +224,8 @@ static const struct pad_config gpio_table[] = {
 static const struct pad_config early_gpio_table[] = {
 /* SRCCLKREQ2# */	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1), /* KEPLER */
 /* UART0_CTS# */	PAD_CFG_GPO(GPP_C11, 0, DEEP), /* EN_PP3300_KEPLER */
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
 };
 
 #endif
diff --git a/src/mainboard/google/glados/variants/lars/include/variant/gpio.h b/src/mainboard/google/glados/variants/lars/include/variant/gpio.h
index 3d00c353d7..acbf157ac0 100644
--- a/src/mainboard/google/glados/variants/lars/include/variant/gpio.h
+++ b/src/mainboard/google/glados/variants/lars/include/variant/gpio.h
@@ -213,6 +213,8 @@ static const struct pad_config early_gpio_table[] = {
 /* SRCCLKREQ2# */	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1), /* KEPLER */
 /* UART0_CTS# */	PAD_CFG_GPO(GPP_C11, 0, DEEP), /* EN_PP3300_KEPLER */
 /* SPI_WP_STATUS */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, UP_20K, DEEP),
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
 };
 
 #endif
diff --git a/src/mainboard/google/glados/variants/sentry/include/variant/gpio.h b/src/mainboard/google/glados/variants/sentry/include/variant/gpio.h
index 717e930d24..a2052a3379 100644
--- a/src/mainboard/google/glados/variants/sentry/include/variant/gpio.h
+++ b/src/mainboard/google/glados/variants/sentry/include/variant/gpio.h
@@ -221,6 +221,8 @@ static const struct pad_config early_gpio_table[] = {
 /* SRCCLKREQ2# */	PAD_CFG_NF(GPP_B7, NONE, DEEP, NF1), /* KEPLER */
 /* SPI_WP_STATUS */	PAD_CFG_GPI_GPIO_DRIVER(GPP_C23, UP_20K, DEEP),
 /* UART0_CTS# */	PAD_CFG_GPO(GPP_C11, 0, DEEP), /* EN_PP3300_KEPLER */
+/* GD_UART2_RXD */	PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+/* GD_UART2_TXD */	PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
 };
 
 #endif