mb/amd/majolica: Add an empty bootblock function to handle GPIO

Change-Id: I35da3812a424ea1beef86d043a756a87e6afdaa3
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50117
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/amd/majolica/Makefile.inc

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 bootblock-y += bootblock.c
+bootblock-y += early_gpio.c
 
 APCB_SOURCES = $(MAINBOARD_BLOBS_DIR)/APCB_CZN_D4_Updatable.bin
 APCB_SOURCES_68 = $(MAINBOARD_BLOBS_DIR)/APCB_CZN_D4_Updatable_68.bin

src/mainboard/amd/majolica/bootblock.c

@@ -1,7 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <bootblock_common.h>
+#include "gpio.h"
 
 void bootblock_mainboard_early_init(void)
 {
+	mainboard_program_early_gpios();
 }

src/mainboard/amd/majolica/early_gpio.c

@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <soc/gpio.h>
+#include "gpio.h"
+
+/* GPIO pins used by coreboot should be initialized in bootblock */
+
+static const struct soc_amd_gpio gpio_set_stage_reset[] = {
+};
+
+void mainboard_program_early_gpios(void)
+{
+	program_gpios(gpio_set_stage_reset, ARRAY_SIZE(gpio_set_stage_reset));
+}

src/mainboard/amd/majolica/gpio.h

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef MAINBOARD_GPIO_H
+#define MAINBOARD_GPIO_H
+
+void mainboard_program_early_gpios(void); /* bootblock GPIO configuration */
+
+#endif  /* MAINBOARD_GPIO_H */