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

Add method variant_romstage_gpio_table() with empty weak implementation
to allow variants to override as needed for touchscreen power
sequencing (to be implemented in a subsequent commit). Call method
in romstage to program any GPIOs the variant may need to set.

TEST=tested with rest of patch train

Change-Id: I4a8e11945ae64b000051989089e0ebae22896c6b
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70905
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/octopus/romstage.c

@@ -5,13 +5,20 @@
 #include <console/console.h>
 #include <ec/google/chromeec/ec.h>
 #include <memory_info.h>
+#include <soc/gpio.h>
 #include <soc/meminit.h>
 #include <soc/romstage.h>
 
 void mainboard_memory_init_params(FSPM_UPD *memupd)
 {
+	const struct pad_config *pads;
+	size_t pads_num;
+
 	meminit_lpddr4_by_sku(&memupd->FspmConfig,
 		variant_lpddr4_config(), variant_memory_sku());
+
+	pads = variant_romstage_gpio_table(&pads_num);
+	gpio_configure_pads(pads, pads_num);
 }
 
 static void save_dimm_info_by_sku_config(void)

src/mainboard/google/octopus/variants/baseboard/Makefile.inc

@@ -1,6 +1,7 @@
 bootblock-y += gpio.c
 
 romstage-y += memory.c
+romstage-y += gpio.c
 
 ramstage-y += gpio.c
 ramstage-y += nhlt.c

src/mainboard/google/octopus/variants/baseboard/gpio.c

@@ -377,6 +377,13 @@ variant_sleep_gpio_table(size_t *num, int slp_typ)
 	return sleep_gpio_table;
 }
 
+const struct pad_config *__weak
+variant_romstage_gpio_table(size_t *num)
+{
+	*num = 0;
+	return NULL;
+}
+
 static const struct cros_gpio cros_gpios[] = {
 	CROS_GPIO_REC_AL(CROS_GPIO_VIRTUAL, CROS_GPIO_DEVICE_NAME),
 	CROS_GPIO_WP_AH(PAD_SCC(GPIO_PCH_WP), GPIO_COMM_SCC_NAME),

src/mainboard/google/octopus/variants/baseboard/include/baseboard/variants.h

@@ -15,6 +15,7 @@ const struct pad_config *variant_override_gpio_table(size_t *num);
 const struct pad_config *variant_early_gpio_table(size_t *num);
 const struct pad_config *variant_early_override_gpio_table(size_t *num);
 const struct pad_config *variant_sleep_gpio_table(size_t *num, int slp_typ);
+const struct pad_config *variant_romstage_gpio_table(size_t *num);
 
 /* Baseboard default swizzle. Can be reused if swizzle is same. */
 extern const struct lpddr4_swizzle_cfg baseboard_lpddr4_swizzle;