diff --git a/src/mainboard/google/geralt/Kconfig b/src/mainboard/google/geralt/Kconfig
index f327a027cd..fcc52cee36 100644
--- a/src/mainboard/google/geralt/Kconfig
+++ b/src/mainboard/google/geralt/Kconfig
@@ -25,4 +25,8 @@ config MAINBOARD_DIR
 config MAINBOARD_PART_NUMBER
 	string
 	default "Geralt" if BOARD_GOOGLE_GERALT
+
+config BOOT_DEVICE_SPI_FLASH_BUS
+	int
+	default 7
 endif
diff --git a/src/mainboard/google/geralt/bootblock.c b/src/mainboard/google/geralt/bootblock.c
index 0413ef2452..88be0ffec1 100644
--- a/src/mainboard/google/geralt/bootblock.c
+++ b/src/mainboard/google/geralt/bootblock.c
@@ -2,8 +2,9 @@
 
 #include <bootblock_common.h>
 #include <device/mmio.h>
+#include <soc/spi.h>
 
 void bootblock_mainboard_init(void)
 {
-	/* TODO: add mainboard init for bootblock */
+	mtk_snfc_init();
 }