mb/google/skyrim: Allow variants to override romstage GPIO table

Switch from gpio_configure_pads() to gpio_configure_pads_with_override()
so variants can override romstage GPIO defaults. Rename baseboard
function and add an weak empty override function to be used by variants.
Will be used for touchscreen power sequencing in a follow-on commit.

Change-Id: I45586237919cd07a171beac57f3510e26338f67f
Signed-off-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67811
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

3 files changed, 17 insertions, 8 deletions

diff --git a/src/mainboard/google/skyrim/romstage.c b/src/mainboard/google/skyrim/romstage.c
index cf93fc568524..ce25ee918223 100644
--- a/src/mainboard/google/skyrim/romstage.c
+++ b/src/mainboard/google/skyrim/romstage.c
@@ -5,11 +5,11 @@
 
 void mb_pre_fspm(FSP_M_CONFIG *mcfg)
 {
-	size_t base_num_gpios;
-	const struct soc_amd_gpio *base_gpios;
+	size_t num_base_gpios, num_override_gpios;
+	const struct soc_amd_gpio *base_gpios, *override_gpios;
 
-	/* Initialize PCIe reset. */
-	variant_romstage_gpio_table(&base_gpios, &base_num_gpios);
-
-	gpio_configure_pads(base_gpios, base_num_gpios);
+	baseboard_romstage_gpio_table(&base_gpios, &num_base_gpios);
+	variant_romstage_override_gpio_table(&override_gpios, &num_override_gpios);
+	gpio_configure_pads_with_override(base_gpios, num_base_gpios,
+				override_gpios, num_override_gpios);
 }
diff --git a/src/mainboard/google/skyrim/variants/baseboard/gpio.c b/src/mainboard/google/skyrim/variants/baseboard/gpio.c
index b234a5dee3c0..b44114e48c2b 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/gpio.c
+++ b/src/mainboard/google/skyrim/variants/baseboard/gpio.c
@@ -202,12 +202,18 @@ static const struct soc_amd_gpio romstage_gpio_table[] = {
 	PAD_GPO(GPIO_6, HIGH),
 };
 
-__weak void variant_romstage_gpio_table(const struct soc_amd_gpio **gpio, size_t *size)
+void baseboard_romstage_gpio_table(const struct soc_amd_gpio **gpio, size_t *size)
 {
 	*size = ARRAY_SIZE(romstage_gpio_table);
 	*gpio = romstage_gpio_table;
 }
 
+__weak void variant_romstage_override_gpio_table(const struct soc_amd_gpio **gpio, size_t *size)
+{
+	*size = 0;
+	*gpio = NULL;
+}
+
 void baseboard_gpio_table(const struct soc_amd_gpio **gpio, size_t *size)
 {
 	*size = ARRAY_SIZE(base_gpio_table);
diff --git a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
index 73ccc0399136..4d71c5cc5c44 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
+++ b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
@@ -39,6 +39,9 @@ void variant_espi_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
 void variant_tpm_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
 
 /* This function provides GPIO settings in romstage. */
-void variant_romstage_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
+void baseboard_romstage_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
+
+/* This function allows variant to override any GPIO init in romstage. */
+void variant_romstage_override_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
 
 #endif /* __BASEBOARD_VARIANTS_H__ */