mb/google/hatch: 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: I1939387b5bb98d6d282fd044e9ce8780dbe0d2c5
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71058
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/google/hatch/romstage.c

@@ -31,6 +31,8 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	struct cnl_mb_cfg memcfg;
 	int mem_sku;
 	int is_single_ch_mem;
+	const struct pad_config *pads;
+	size_t pads_num;
 
 	variant_memory_params(&memcfg);
 	mem_sku = variant_memory_sku();
@@ -53,4 +55,7 @@ void mainboard_memory_init_params(FSPM_UPD *memupd)
 	}
 
 	cannonlake_memcfg_init(&memupd->FspmConfig, &memcfg);
+
+	pads = variant_romstage_gpio_table(&pads_num);
+	gpio_configure_pads(pads, pads_num);
 }

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

@@ -434,6 +434,12 @@ const struct pad_config *__weak variant_early_gpio_table(size_t *num)
 	return NULL;
 }
 
+/* Weak implementation of romstage gpio */
+const struct pad_config *__weak variant_romstage_gpio_table(size_t *num)
+{
+	*num = 0;
+	return NULL;
+}
 /* Weak implementation of finalize gpio */
 const struct pad_config *__weak variant_finalize_gpio_table(size_t *num)
 {

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

@@ -24,6 +24,9 @@ int variant_memory_sku(void);
 /* Return variant specific gpio pads to be configured during sleep */
 const struct pad_config *variant_sleep_gpio_table(u8 slp_typ, size_t *num);
 
+/* Return GPIO pads that need to be configured during romstage */
+const struct pad_config *variant_romstage_gpio_table(size_t *num);
+
 /* Return GPIO pads that need to be configured before ramstage */
 const struct pad_config *variant_early_gpio_table(size_t *num);