mb/google/drallion: Add method to set GPIOs in romstage

Add method variant_romstage_gpio_table() with empty implementation to
be used in a subsequent commit for touchscreen power sequencing.
Call method in romstage to program any GPIOs that may need to be set.

TEST=tested with rest of patch train

Change-Id: I0ad0c18a8b61e59a943a453882bf74762bac4700
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71190
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/src/mainboard/google/drallion/variants/drallion/gpio.c b/src/mainboard/google/drallion/variants/drallion/gpio.c
index 6220bf28b7..b008427b7b 100644
--- a/src/mainboard/google/drallion/variants/drallion/gpio.c
+++ b/src/mainboard/google/drallion/variants/drallion/gpio.c
@@ -249,6 +249,12 @@ const struct pad_config *variant_early_gpio_table(size_t *num)
 	return early_gpio_table;
 }
 
+const struct pad_config *variant_romstage_gpio_table(size_t *num)
+{
+	*num = 0;
+	return NULL;
+}
+
 static const struct cros_gpio cros_gpios[] = {
 	CROS_GPIO_REC_AL(GPP_E8, CROS_GPIO_DEVICE_NAME),
 	CROS_GPIO_WP_AH(GPP_E15, CROS_GPIO_DEVICE_NAME),
diff --git a/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h b/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h
index db0b3a9466..ee48fec46b 100644
--- a/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h
+++ b/src/mainboard/google/drallion/variants/drallion/include/variant/gpio.h
@@ -28,5 +28,6 @@
 
 const struct pad_config *variant_gpio_table(size_t *num);
 const struct pad_config *variant_early_gpio_table(size_t *num);
+const struct pad_config *variant_romstage_gpio_table(size_t *num);
 
 #endif