diff --git a/arch/mips/mach-mtmips/Kconfig b/arch/mips/mach-mtmips/Kconfig
index 83d7648..5a5f2e3 100644
--- a/arch/mips/mach-mtmips/Kconfig
+++ b/arch/mips/mach-mtmips/Kconfig
@@ -65,7 +65,6 @@
 	bool "GARDENA smart Gateway"
 	depends on SOC_MT7628
 	select BOARD_LATE_INIT
-	select SUPPORTS_BOOT_RAM
 	help
 	  GARDENA smart Gateway boards have a MT7688 SoC with 128 MiB of RAM
 	  and 8 MiB of flash (SPI NOR) and additional SPI NAND storage.
@@ -73,7 +72,6 @@
 config BOARD_LINKIT_SMART_7688
 	bool "LinkIt Smart 7688"
 	depends on SOC_MT7628
-	select SUPPORTS_BOOT_RAM
 	help
 	  Seeed LinkIt Smart 7688 boards have a MT7688 SoC with 128 MiB of RAM
 	  and 32 MiB of flash (SPI).
@@ -83,30 +81,6 @@
 
 endchoice
 
-choice
-	prompt "Boot mode"
-
-config BOOT_RAM
-	bool "RAM boot"
-	depends on SUPPORTS_BOOT_RAM
-	help
-	  This builds an image that is linked to a RAM address. It can be used
-	  for booting from CFE via TFTP using an ELF image, but it can also be
-	  booted from RAM by other bootloaders using a BIN image.
-
-config BOOT_ROM
-	bool "ROM boot"
-	depends on SUPPORTS_BOOT_RAM
-	help
-	  This builds an image that is linked to a ROM address. It can be
-	  used as main bootloader image which is programmed onto the onboard
-	  flash storage (SPI NOR).
-
-endchoice
-
-config SUPPORTS_BOOT_RAM
-	bool
-
 config SPL_UART2_SPIS_PINMUX
 	bool "Use alternative pinmux for UART2 in SPL stage"
 	depends on SPL_SERIAL_SUPPORT
diff --git a/board/gardena/smart-gateway-mt7688/board.c b/board/gardena/smart-gateway-mt7688/board.c
index 48cf309..776afa4 100644
--- a/board/gardena/smart-gateway-mt7688/board.c
+++ b/board/gardena/smart-gateway-mt7688/board.c
@@ -295,8 +295,10 @@
 	return ret;
 }
 
+#ifndef CONFIG_SPL_BUILD
 U_BOOT_CMD(
 	fd_write,	1,	0,	do_fd_write,
 	"Write test factory-data values to SPI NOR",
 	"\n"
 );
+#endif
diff --git a/configs/gardena-smart-gateway-mt7688-ram_defconfig b/configs/gardena-smart-gateway-mt7688-ram_defconfig
deleted file mode 100644
index 48b7a43..0000000
--- a/configs/gardena-smart-gateway-mt7688-ram_defconfig
+++ /dev/null
@@ -1,74 +0,0 @@
-CONFIG_MIPS=y
-CONFIG_SYS_TEXT_BASE=0x80010000
-CONFIG_ENV_SIZE=0x10000
-CONFIG_ENV_SECT_SIZE=0x10000
-CONFIG_ENV_OFFSET=0xA0000
-CONFIG_SYS_BOOTCOUNT_ADDR=0xb000006c
-CONFIG_NR_DRAM_BANKS=1
-CONFIG_SYS_BOOTCOUNT_SINGLEWORD=y
-CONFIG_ENV_OFFSET_REDUND=0xB0000
-CONFIG_ARCH_MTMIPS=y
-CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
-# CONFIG_MIPS_BOOT_ENV_LEGACY is not set
-CONFIG_MIPS_BOOT_FDT=y
-CONFIG_ENV_VARS_UBOOT_CONFIG=y
-CONFIG_FIT=y
-CONFIG_FIT_SIGNATURE=y
-CONFIG_LEGACY_IMAGE_FORMAT=y
-CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_USE_BOOTCOMMAND=y
-CONFIG_BOOTCOMMAND="cp.b 83000000 84000000 10000 && dhcp uEnv.txt && env import -t ${fileaddr} ${filesize} && run do_u_boot_init; reset"
-CONFIG_USE_PREBOOT=y
-CONFIG_SYS_CONSOLE_INFO_QUIET=y
-CONFIG_VERSION_VARIABLE=y
-CONFIG_BOARD_EARLY_INIT_F=y
-CONFIG_HUSH_PARSER=y
-CONFIG_CMD_LICENSE=y
-# CONFIG_CMD_ELF is not set
-# CONFIG_CMD_XIMG is not set
-CONFIG_CMD_MEMINFO=y
-# CONFIG_CMD_FLASH is not set
-CONFIG_CMD_GPIO=y
-# CONFIG_CMD_LOADS is not set
-CONFIG_CMD_MTD=y
-CONFIG_CMD_SPI=y
-CONFIG_CMD_WDT=y
-CONFIG_CMD_DHCP=y
-CONFIG_CMD_MII=y
-CONFIG_CMD_PING=y
-CONFIG_CMD_BOOTCOUNT=y
-CONFIG_CMD_TIME=y
-CONFIG_CMD_UUID=y
-CONFIG_CMD_MTDPARTS=y
-CONFIG_MTDIDS_DEFAULT="spi-nand0=spi0.1,nor0=spi0.0"
-CONFIG_MTDPARTS_DEFAULT="spi0.0:640k(uboot),64k(uboot_env0),64k(uboot_env1),64k(factory),-(unused);spi0.1:-(nand)"
-CONFIG_CMD_UBI=y
-CONFIG_DEFAULT_DEVICE_TREE="gardena-smart-gateway-mt7688"
-CONFIG_ENV_IS_IN_SPI_FLASH=y
-CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
-CONFIG_SYS_RELOC_GD_ENV_ADDR=y
-CONFIG_NET_RANDOM_ETHADDR=y
-# CONFIG_DM_DEVICE_REMOVE is not set
-CONFIG_HAVE_BLOCK_DEVICE=y
-CONFIG_BOOTCOUNT_LIMIT=y
-CONFIG_LED=y
-CONFIG_LED_BLINK=y
-CONFIG_LED_GPIO=y
-CONFIG_MTD=y
-CONFIG_DM_MTD=y
-CONFIG_MTD_SPI_NAND=y
-CONFIG_SPI_FLASH_GIGADEVICE=y
-CONFIG_SPI_FLASH_MACRONIX=y
-CONFIG_SPI_FLASH_SPANSION=y
-CONFIG_SPI_FLASH_STMICRO=y
-CONFIG_SPI_FLASH_WINBOND=y
-CONFIG_SPI_FLASH_XMC=y
-CONFIG_SPI_FLASH_MTD=y
-CONFIG_MTD_UBI_BEB_LIMIT=22
-CONFIG_MT7628_ETH=y
-CONFIG_PHY=y
-CONFIG_SPI=y
-CONFIG_MT7621_SPI=y
-CONFIG_WDT=y
-CONFIG_WDT_MT7621=y
-CONFIG_LZMA=y
diff --git a/configs/gardena-smart-gateway-mt7688_defconfig b/configs/gardena-smart-gateway-mt7688_defconfig
index 0209af0..8951bd3 100644
--- a/configs/gardena-smart-gateway-mt7688_defconfig
+++ b/configs/gardena-smart-gateway-mt7688_defconfig
@@ -1,14 +1,17 @@
 CONFIG_MIPS=y
-CONFIG_SYS_TEXT_BASE=0x9c000000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_ENV_SIZE=0x10000
-CONFIG_ENV_SECT_SIZE=0x10000
 CONFIG_ENV_OFFSET=0xA0000
+CONFIG_ENV_SECT_SIZE=0x10000
 CONFIG_SYS_BOOTCOUNT_ADDR=0xb000006c
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x20000
 CONFIG_NR_DRAM_BANKS=1
+CONFIG_SPL=y
 CONFIG_SYS_BOOTCOUNT_SINGLEWORD=y
 CONFIG_ENV_OFFSET_REDUND=0xB0000
 CONFIG_ARCH_MTMIPS=y
-CONFIG_BOOT_ROM=y
 CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
 # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
 CONFIG_MIPS_BOOT_FDT=y
@@ -23,6 +26,8 @@
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_VERSION_VARIABLE=y
 CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_NOR_SUPPORT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_LICENSE=y
 # CONFIG_CMD_ELF is not set
@@ -49,6 +54,7 @@
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_DM=y
 # CONFIG_DM_DEVICE_REMOVE is not set
 CONFIG_HAVE_BLOCK_DEVICE=y
 CONFIG_BOOTCOUNT_LIMIT=y
@@ -73,3 +79,4 @@
 CONFIG_WDT=y
 CONFIG_WDT_MT7621=y
 CONFIG_LZMA=y
+CONFIG_SPL_LZMA=y
diff --git a/configs/linkit-smart-7688-ram_defconfig b/configs/linkit-smart-7688-ram_defconfig
deleted file mode 100644
index 1db94db..0000000
--- a/configs/linkit-smart-7688-ram_defconfig
+++ /dev/null
@@ -1,65 +0,0 @@
-CONFIG_MIPS=y
-CONFIG_SYS_TEXT_BASE=0x80010000
-CONFIG_ENV_SIZE=0x4000
-CONFIG_ENV_SECT_SIZE=0x10000
-CONFIG_ENV_OFFSET=0x80000
-CONFIG_NR_DRAM_BANKS=1
-CONFIG_ARCH_MTMIPS=y
-CONFIG_BOARD_LINKIT_SMART_7688=y
-CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
-# CONFIG_MIPS_BOOT_ENV_LEGACY is not set
-CONFIG_MIPS_BOOT_FDT=y
-CONFIG_FIT=y
-CONFIG_FIT_SIGNATURE=y
-CONFIG_LEGACY_IMAGE_FORMAT=y
-CONFIG_OF_STDOUT_VIA_ALIAS=y
-CONFIG_SYS_CONSOLE_INFO_QUIET=y
-CONFIG_BOARD_EARLY_INIT_F=y
-CONFIG_HUSH_PARSER=y
-CONFIG_CMD_LICENSE=y
-# CONFIG_CMD_ELF is not set
-# CONFIG_CMD_XIMG is not set
-CONFIG_CMD_MEMINFO=y
-# CONFIG_CMD_FLASH is not set
-CONFIG_CMD_GPIO=y
-# CONFIG_CMD_LOADS is not set
-CONFIG_CMD_MTD=y
-CONFIG_CMD_PART=y
-CONFIG_CMD_SPI=y
-CONFIG_CMD_USB=y
-CONFIG_CMD_DHCP=y
-CONFIG_CMD_MII=y
-CONFIG_CMD_PING=y
-CONFIG_CMD_TIME=y
-CONFIG_CMD_FS_GENERIC=y
-# CONFIG_DOS_PARTITION is not set
-CONFIG_DEFAULT_DEVICE_TREE="linkit-smart-7688"
-CONFIG_ENV_IS_IN_SPI_FLASH=y
-CONFIG_SYS_RELOC_GD_ENV_ADDR=y
-CONFIG_NET_RANDOM_ETHADDR=y
-# CONFIG_DM_DEVICE_REMOVE is not set
-CONFIG_BLK=y
-CONFIG_LED=y
-CONFIG_LED_BLINK=y
-CONFIG_LED_GPIO=y
-CONFIG_MTD=y
-CONFIG_SPI_FLASH_GIGADEVICE=y
-CONFIG_SPI_FLASH_MACRONIX=y
-CONFIG_SPI_FLASH_SPANSION=y
-CONFIG_SPI_FLASH_STMICRO=y
-CONFIG_SPI_FLASH_WINBOND=y
-CONFIG_SPI_FLASH_MTD=y
-CONFIG_MT7628_ETH=y
-CONFIG_PHY=y
-CONFIG_MT76X8_USB_PHY=y
-CONFIG_SPI=y
-CONFIG_MT7621_SPI=y
-CONFIG_USB=y
-CONFIG_DM_USB=y
-CONFIG_USB_EHCI_HCD=y
-CONFIG_USB_EHCI_GENERIC=y
-CONFIG_USB_STORAGE=y
-CONFIG_FS_EXT4=y
-CONFIG_FS_FAT=y
-CONFIG_LZMA=y
-CONFIG_LZO=y
diff --git a/configs/linkit-smart-7688_defconfig b/configs/linkit-smart-7688_defconfig
index 34066dd..629c33a 100644
--- a/configs/linkit-smart-7688_defconfig
+++ b/configs/linkit-smart-7688_defconfig
@@ -1,12 +1,15 @@
 CONFIG_MIPS=y
-CONFIG_SYS_TEXT_BASE=0x9c000000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_ENV_SIZE=0x4000
-CONFIG_ENV_SECT_SIZE=0x10000
 CONFIG_ENV_OFFSET=0x80000
+CONFIG_ENV_SECT_SIZE=0x10000
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x20000
 CONFIG_NR_DRAM_BANKS=1
+CONFIG_SPL=y
 CONFIG_ARCH_MTMIPS=y
 CONFIG_BOARD_LINKIT_SMART_7688=y
-CONFIG_BOOT_ROM=y
 CONFIG_RESTORE_EXCEPTION_VECTOR_BASE=y
 # CONFIG_MIPS_BOOT_ENV_LEGACY is not set
 CONFIG_MIPS_BOOT_FDT=y
@@ -16,6 +19,8 @@
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_SPL_SYS_MALLOC_SIMPLE=y
+CONFIG_SPL_NOR_SUPPORT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_LICENSE=y
 # CONFIG_CMD_ELF is not set
@@ -39,6 +44,7 @@
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_DM=y
 # CONFIG_DM_DEVICE_REMOVE is not set
 CONFIG_BLK=y
 CONFIG_LED=y
@@ -65,3 +71,4 @@
 CONFIG_FS_FAT=y
 CONFIG_LZMA=y
 CONFIG_LZO=y
+CONFIG_SPL_LZMA=y
diff --git a/include/configs/gardena-smart-gateway-mt7688.h b/include/configs/gardena-smart-gateway-mt7688.h
index 59c6074..6412efc 100644
--- a/include/configs/gardena-smart-gateway-mt7688.h
+++ b/include/configs/gardena-smart-gateway-mt7688.h
@@ -16,10 +16,29 @@
 
 #define CONFIG_SYS_INIT_SP_OFFSET	0x400000
 
-#ifdef CONFIG_BOOT_RAM
+/* SPL */
+#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
 #define CONFIG_SKIP_LOWLEVEL_INIT
 #endif
 
+#define CONFIG_SYS_UBOOT_START		CONFIG_SYS_TEXT_BASE
+#define CONFIG_SPL_BSS_START_ADDR	0x80010000
+#define CONFIG_SPL_BSS_MAX_SIZE		0x10000
+#define CONFIG_SPL_MAX_SIZE		0x10000
+#define CONFIG_SPL_PAD_TO		0
+
+/* Dummy value */
+#define CONFIG_SYS_UBOOT_BASE		0
+
+/* Serial SPL */
+#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_SERIAL_SUPPORT)
+#define CONFIG_SYS_NS16550_MEM32
+#define CONFIG_SYS_NS16550_CLK		40000000
+#define CONFIG_SYS_NS16550_REG_SIZE	-4
+#define CONFIG_SYS_NS16550_COM1		0xb0000c00
+#define CONFIG_CONS_INDEX		1
+#endif
+
 /* UART */
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200, \
 					  230400, 460800, 921600 }
diff --git a/include/configs/linkit-smart-7688.h b/include/configs/linkit-smart-7688.h
index ca5b693..4276e95 100644
--- a/include/configs/linkit-smart-7688.h
+++ b/include/configs/linkit-smart-7688.h
@@ -16,10 +16,30 @@
 
 #define CONFIG_SYS_INIT_SP_OFFSET	0x400000
 
-#ifdef CONFIG_BOOT_RAM
+/* SPL */
+#if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
 #define CONFIG_SKIP_LOWLEVEL_INIT
 #endif
 
+#define CONFIG_SYS_UBOOT_START		CONFIG_SYS_TEXT_BASE
+#define CONFIG_SPL_BSS_START_ADDR	0x80010000
+#define CONFIG_SPL_BSS_MAX_SIZE		0x10000
+#define CONFIG_SPL_MAX_SIZE		0x10000
+#define CONFIG_SPL_PAD_TO		0
+
+/* Dummy value */
+#define CONFIG_SYS_UBOOT_BASE		0
+
+/* Serial SPL */
+#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_SERIAL_SUPPORT)
+#define CONFIG_SYS_NS16550_MEM32
+#define CONFIG_SYS_NS16550_CLK		40000000
+#define CONFIG_SYS_NS16550_REG_SIZE	-4
+#define CONFIG_SYS_NS16550_COM3		0xb0000e00
+#define CONFIG_CONS_INDEX		3
+
+#endif
+
 /* UART */
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200, \
 					  230400, 460800, 921600 }