mb/google/geralt: Enable Chrome EC

Initialize SPI bus 0 for Chrome EC control.

TEST=build pass
BUG=b:236331724

Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: I6de5ea8a0273a3b0c725e4cdbcf69f4db74c5db7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66272
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/mainboard/google/geralt/Kconfig

@@ -8,17 +8,22 @@ if BOARD_GOOGLE_GERALT_COMMON
 
 config VBOOT
 	select VBOOT_VBNV_FLASH
+	select EC_GOOGLE_CHROMEEC_SWITCHES
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select SOC_MEDIATEK_MT8188
 	select BOARD_ROMSIZE_KB_8192
 	select MAINBOARD_HAS_CHROMEOS
+	select CHROMEOS_USE_EC_WATCHDOG_FLAG if CHROMEOS
 	select COMMON_CBFS_SPI_WRAPPER
 	select SPI_FLASH
 	select SPI_FLASH_INCLUDE_ALL_DRIVERS
 	select COMMONLIB_STORAGE
 	select COMMONLIB_STORAGE_MMC
+	select EC_GOOGLE_CHROMEEC
+	select EC_GOOGLE_CHROMEEC_BOARDID
+	select EC_GOOGLE_CHROMEEC_SPI
 
 config MAINBOARD_DIR
 	string
@@ -31,4 +36,8 @@ config MAINBOARD_PART_NUMBER
 config BOOT_DEVICE_SPI_FLASH_BUS
 	int
 	default 7
+
+config EC_GOOGLE_CHROMEEC_SPI_BUS
+	hex
+	default 0x0
 endif

src/mainboard/google/geralt/bootblock.c

@@ -6,5 +6,6 @@
 
 void bootblock_mainboard_init(void)
 {
+	mtk_spi_init(CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS, SPI_PAD0_MASK, 3 * MHz, 0);
 	mtk_snfc_init();
 }

src/mainboard/google/geralt/chromeos.c

@@ -7,9 +7,3 @@ void fill_lb_gpios(struct lb_gpios *gpios)
 {
 	/* TODO: add Chrome specific gpios */
 }
-
-int get_recovery_mode_switch(void)
-{
-	/* TODO: use Chrome EC switches when EC support is added */
-	return 0;
-}

src/mainboard/google/geralt/gpio.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MAINBOARD_GOOGLE_GERALT_GPIO_H__
+#define __MAINBOARD_GOOGLE_GERALT_GPIO_H__
+
+#include <soc/gpio.h>
+
+#define GPIO_AP_EC_WARM_RST_REQ	GPIO(DPI_HSYNC)
+
+void setup_chromeos_gpios(void);
+
+#endif

src/mainboard/google/geralt/reset.c

@@ -1,8 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <gpio.h>
 #include <reset.h>
 
+#include "gpio.h"
+
 void do_board_reset(void)
 {
-	/* TODO: add reset function when gpio is ready */
+	gpio_output(GPIO_AP_EC_WARM_RST_REQ, 1);
 }