diff --git a/board/socionext/developerbox/Kconfig b/board/socionext/developerbox/Kconfig
index c181d26a44..4e2c341aad 100644
--- a/board/socionext/developerbox/Kconfig
+++ b/board/socionext/developerbox/Kconfig
@@ -32,4 +32,23 @@ config SYS_CONFIG_NAME
 	default "synquacer"
 
 endif
+
+config FWU_MULTI_BANK_UPDATE
+	select FWU_MULTI_BANK_UPDATE_SF
+
+config FWU_MULTI_BANK_UPDATE_SF
+	select DM_SPI_FLASH
+
+config FWU_NUM_BANKS
+	default 6
+
+config FWU_NUM_IMAGES_PER_BANK
+	default 1
+
+config FWU_SF_PRIMARY_MDATA_OFFSET
+	default 0x500000
+
+config FWU_SF_SECONDARY_MDATA_OFFSET
+	default 0x520000
+
 endif
diff --git a/board/socionext/developerbox/Makefile b/board/socionext/developerbox/Makefile
index 4a46de995a..15cce9c57e 100644
--- a/board/socionext/developerbox/Makefile
+++ b/board/socionext/developerbox/Makefile
@@ -7,3 +7,4 @@
 #
 
 obj-y	:= developerbox.o
+obj-$(CONFIG_FWU_MULTI_BANK_UPDATE_SF) += fwu_plat.o
diff --git a/board/socionext/developerbox/fwu_plat.c b/board/socionext/developerbox/fwu_plat.c
new file mode 100644
index 0000000000..dbb814f1fd
--- /dev/null
+++ b/board/socionext/developerbox/fwu_plat.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2021, Linaro Limited
+ */
+
+#include <efi_loader.h>
+#include <fwu.h>
+#include <fwu_mdata.h>
+#include <malloc.h>
+#include <memalign.h>
+#include <spi.h>
+#include <spi_flash.h>
+#include <flash.h>
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <u-boot/crc.h>
+
+/* SPI Flash accessors */
+static struct spi_flash *plat_spi_flash;
+
+static int __plat_sf_get_flash(void)
+{
+	struct udevice *new;
+	int	ret;
+
+	//TODO: use CONFIG_FWU_SPI_*
+	ret = spi_flash_probe_bus_cs(CONFIG_SF_DEFAULT_BUS, CONFIG_SF_DEFAULT_CS,
+				     CONFIG_SF_DEFAULT_SPEED, CONFIG_SF_DEFAULT_MODE,
+				     &new);
+	if (ret)
+		return ret;
+
+	plat_spi_flash = dev_get_uclass_priv(new);
+	return 0;
+}
+
+static int plat_sf_get_flash(struct spi_flash **flash)
+{
+	int ret = 0;
+
+	if (!plat_spi_flash)
+		ret = __plat_sf_get_flash();
+
+	*flash = plat_spi_flash;
+
+	return ret;
+}
+
+static int sf_load_data(u32 offs, u32 size, void **data)
+{
+	struct spi_flash *flash;
+	int ret;
+
+	ret = plat_sf_get_flash(&flash);
+	if (ret < 0)
+		return ret;
+
+	*data = memalign(ARCH_DMA_MINALIGN, size);
+	if (!*data)
+		return -ENOMEM;
+
+	ret = spi_flash_read(flash, offs, size, *data);
+	if (ret < 0) {
+		free(*data);
+		*data = NULL;
+	}
+
+	return ret;
+}
+
+/* Platform dependent GUIDs */
+
+/* The GUID for the SNI FIP image type GUID */
+#define FWU_IMAGE_TYPE_DEVBOX_FIP_GUID \
+	EFI_GUID(0x7d6dc310, 0x52ca, 0x43b8, 0xb7, 0xb9, \
+		 0xf9, 0xd6, 0xc5, 0x01, 0xd1, 0x08)
+
+#define PLAT_METADATA_OFFSET	0x510000
+#define PLAT_METADATA_SIZE	(sizeof(struct devbox_metadata))
+
+struct __packed devbox_metadata {
+	u32 boot_index;
+	u32 boot_count;
+	u32 invert_dual;
+} *devbox_plat_metadata;
+
+static const efi_guid_t devbox_fip_image_type_guid = FWU_IMAGE_TYPE_DEVBOX_FIP_GUID;
+
+int fwu_plat_get_image_alt_num(efi_guid_t image_type_id, u32 update_bank,
+			       int *alt_no)
+{
+	/* DeveloperBox FWU Multi bank only supports FIP image. */
+	if (guidcmp(&image_type_id, &devbox_fip_image_type_guid))
+		return -EOPNOTSUPP;
+
+	/*
+	 * DeveloperBox FWU expects Bank:Image = 1:1, and the dfu_alt_info
+	 * only has the entries for banks. Thus the alt_no should be equal
+	 * to the update_bank.
+	 */
+	update_bank %= CONFIG_FWU_NUM_BANKS;
+	*alt_no = update_bank;
+
+	return 0;
+}
+
+/* SPI flash doesn't have GPT, and it's not blk device */
+int fwu_plat_fill_partition_guids(efi_guid_t **part_guid_arr)
+{
+	efi_status_t ret;
+
+	free(*part_guid_arr);
+
+	ret = efi_fill_part_guid_array(&devbox_fip_image_type_guid, part_guid_arr);
+	return (ret != EFI_SUCCESS) ? -ENOMEM : 0;
+}
+
+/* TBD: add a usage counter for wear leveling */
+int fwu_plat_get_update_index(u32 *update_idx)
+{
+	int ret;
+	u32 active_idx;
+
+	ret = fwu_get_active_index(&active_idx);
+
+	if (ret < 0)
+		return -1;
+
+	*update_idx = (active_idx + 1) % CONFIG_FWU_NUM_BANKS;
+
+	return ret;
+}
+
+static int devbox_load_plat_metadata(void)
+{
+	if (devbox_plat_metadata)
+		return 0;
+
+	return sf_load_data(PLAT_METADATA_OFFSET, PLAT_METADATA_SIZE,
+			 (void **)&devbox_plat_metadata);
+}
+
+void fwu_plat_get_bootidx(void *boot_idx)
+{
+	u32 *bootidx = boot_idx;
+
+	if (devbox_load_plat_metadata() < 0)
+		*bootidx = 0;
+	else
+		*bootidx = devbox_plat_metadata->boot_index;
+}
+
+struct fwu_mdata_ops *get_plat_fwu_mdata_ops(void)
+{
+	return fwu_sf_get_fwu_mdata_ops();
+}
+
diff --git a/include/configs/synquacer.h b/include/configs/synquacer.h
index 6d67bd2af5..f859237550 100644
--- a/include/configs/synquacer.h
+++ b/include/configs/synquacer.h
@@ -47,8 +47,18 @@
 
 /* Since U-Boot 64bit PCIe support is limited, disable 64bit MMIO support */
 
+#ifdef CONFIG_FWU_MULTI_BANK_UPDATE
+#define DEFAULT_DFU_ALT_INFO "dfu_alt_info="				\
+				"mtd nor1=bank0 raw  600000 400000;"	\
+					 "bank1 raw  a00000 400000;"	\
+					 "bank2 raw  e00000 400000;"	\
+					 "bank3 raw 1200000 400000;"	\
+					 "bank4 raw 1600000 400000;"	\
+					 "bank5 raw 1a00000 400000\0"
+#else
 #define DEFAULT_DFU_ALT_INFO "dfu_alt_info="				\
 			"mtd nor1=fip.bin raw 600000 400000\0"
+#endif
 
 /* Distro boot settings */
 #ifndef CONFIG_SPL_BUILD
diff --git a/include/efi_loader.h b/include/efi_loader.h
index f20d361876..d6dc173feb 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -953,6 +953,9 @@ void efi_memcpy_runtime(void *dest, const void *src, size_t n);
 u16 *efi_create_indexed_name(u16 *buffer, size_t buffer_size, const char *name,
 			     unsigned int index);
 
+efi_status_t efi_fill_part_guid_array(const efi_guid_t *guid,
+				      efi_guid_t **part_guid_arr);
+
 extern const struct efi_firmware_management_protocol efi_fmp_fit;
 extern const struct efi_firmware_management_protocol efi_fmp_raw;
 
diff --git a/lib/efi_loader/efi_firmware.c b/lib/efi_loader/efi_firmware.c
index 107f0cb074..c100be35d3 100644
--- a/lib/efi_loader/efi_firmware.c
+++ b/lib/efi_loader/efi_firmware.c
@@ -97,8 +97,8 @@ efi_status_t EFIAPI efi_firmware_set_package_info_unsupported(
 	return EFI_EXIT(EFI_UNSUPPORTED);
 }
 
-static efi_status_t fill_part_guid_array(const efi_guid_t *guid,
-					 efi_guid_t **part_guid_arr)
+efi_status_t efi_fill_part_guid_array(const efi_guid_t *guid,
+				      efi_guid_t **part_guid_arr)
 {
 	int i;
 	int dfu_num = 0;
@@ -309,8 +309,8 @@ efi_status_t EFIAPI efi_firmware_fit_get_image_info(
 	     !descriptor_size || !package_version || !package_version_name))
 		return EFI_EXIT(EFI_INVALID_PARAMETER);
 
-	ret = fill_part_guid_array(&efi_firmware_image_type_uboot_fit,
-				   &part_guid_arr);
+	ret = efi_fill_part_guid_array(&efi_firmware_image_type_uboot_fit,
+				       &part_guid_arr);
 	if (ret != EFI_SUCCESS)
 		goto out;
 
@@ -429,7 +429,7 @@ efi_status_t EFIAPI efi_firmware_raw_get_image_info(
 		return EFI_EXIT(EFI_INVALID_PARAMETER);
 
 	if (IS_ENABLED(CONFIG_FWU_MULTI_BANK_UPDATE)) {
-		ret = fill_part_guid_array(&null_guid, &part_guid_arr);
+		ret = efi_fill_part_guid_array(&null_guid, &part_guid_arr);
 		if (ret != EFI_SUCCESS)
 			goto out;
 
@@ -444,8 +444,8 @@ efi_status_t EFIAPI efi_firmware_raw_get_image_info(
 			goto out;
 		}
 	} else {
-		ret = fill_part_guid_array(&efi_firmware_image_type_uboot_raw,
-					   &part_guid_arr);
+		ret = efi_fill_part_guid_array(&efi_firmware_image_type_uboot_raw,
+					       &part_guid_arr);
 		if (ret != EFI_SUCCESS)
 			goto out;
 	}
