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authorMichael Niewöhner <foss@mniewoehner.de>2020-12-21 03:46:58 +0100
committerMichael Niewöhner <foss@mniewoehner.de>2021-01-23 09:23:51 +0000
commit58a3f765e9ee014783337669e80c0df5433baace (patch)
tree8443fd5b53b7c36aa6c3160c4a75d156f8d09014
parentd509ee55b6b91270b1369311e20cbc717ad7b4b4 (diff)
downloadcoreboot-58a3f765e9ee014783337669e80c0df5433baace.tar.xz
mb/intel/coffeelake_rvp: 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 UART 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: Ib827e9b2919dbd0e16f30b8dfde46348365d9622 Signed-off-by: Michael Niewöhner <foss@mniewoehner.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/49438 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
-rw-r--r--src/mainboard/intel/coffeelake_rvp/bootblock.c2
-rw-r--r--src/mainboard/intel/coffeelake_rvp/variants/baseboard/gpio.c10
2 files changed, 11 insertions, 1 deletions
diff --git a/src/mainboard/intel/coffeelake_rvp/bootblock.c b/src/mainboard/intel/coffeelake_rvp/bootblock.c
index c39a8ff9ba..90833269e4 100644
--- a/src/mainboard/intel/coffeelake_rvp/bootblock.c
+++ b/src/mainboard/intel/coffeelake_rvp/bootblock.c
@@ -4,7 +4,7 @@
#include <bootblock_common.h>
#include <soc/gpio.h>
-void bootblock_mainboard_init(void)
+void bootblock_mainboard_early_init(void)
{
const struct pad_config *pads;
size_t num;
diff --git a/src/mainboard/intel/coffeelake_rvp/variants/baseboard/gpio.c b/src/mainboard/intel/coffeelake_rvp/variants/baseboard/gpio.c
index 5700f064b0..f9eba5c580 100644
--- a/src/mainboard/intel/coffeelake_rvp/variants/baseboard/gpio.c
+++ b/src/mainboard/intel/coffeelake_rvp/variants/baseboard/gpio.c
@@ -107,8 +107,14 @@ static const struct pad_config gpio_table[] = {
/* C17 : I2C0_SCL */
/* C18 : I2C1_SDA */
/* C19 : I2C1_SCL */
+
+ /*
+ * Note: It's unconfirmed if this redundancy to the bootblock table is necessary.
+ */
/* C20 : UART2_RXD */
+ PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
/* C21 : UART2_TXD */
+ PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
/* C22 : UART2_RTSB */
/* C23 : UART2_CTSB */
@@ -579,6 +585,10 @@ static const struct pad_config gpio_table[] = {
/* Early pad configuration in bootblock */
static const struct pad_config early_gpio_table[] = {
+ /* C20 : UART2_RXD */
+ PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
+ /* C21 : UART2_TXD */
+ PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
};
const struct pad_config *__weak variant_gpio_table(size_t *num)