diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 9cf8e9800d..5cb9bdf2ee 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -84,13 +84,13 @@ config ARCH_MTMIPS
 	select DM_SERIAL
 	imply DM_SPI
 	imply DM_SPI_FLASH
-	select ARCH_MISC_INIT
 	select MIPS_TUNE_24KC
 	select OF_CONTROL
 	select ROM_EXCEPTION_VECTORS
 	select SUPPORTS_CPU_MIPS32_R1
 	select SUPPORTS_CPU_MIPS32_R2
 	select SUPPORTS_LITTLE_ENDIAN
+	select SYS_MALLOC_CLEAR_ON_INIT
 	select SYSRESET
 
 config ARCH_JZ47XX
diff --git a/arch/mips/mach-mtmips/cpu.c b/arch/mips/mach-mtmips/cpu.c
index fcd0484a6d..b0a6397d68 100644
--- a/arch/mips/mach-mtmips/cpu.c
+++ b/arch/mips/mach-mtmips/cpu.c
@@ -68,18 +68,3 @@ int print_cpuinfo(void)
 
 	return 0;
 }
-
-int arch_misc_init(void)
-{
-	/*
-	 * It has been noticed, that sometimes the d-cache is not in a
-	 * "clean-state" when U-Boot is running on MT7688. This was
-	 * detected when using the ethernet driver (which uses d-cache)
-	 * and a TFTP command does not complete. Flushing the complete
-	 * d-cache (again?) here seems to fix this issue.
-	 */
-	flush_dcache_range(gd->bd->bi_memstart,
-			   gd->bd->bi_memstart + gd->ram_size - 1);
-
-	return 0;
-}
diff --git a/configs/gardena-smart-gateway-mt7688-ram_defconfig b/configs/gardena-smart-gateway-mt7688-ram_defconfig
index e09950637f..cb0d33e944 100644
--- a/configs/gardena-smart-gateway-mt7688-ram_defconfig
+++ b/configs/gardena-smart-gateway-mt7688-ram_defconfig
@@ -12,6 +12,7 @@ CONFIG_IMAGE_FORMAT_LEGACY=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
@@ -26,6 +27,7 @@ CONFIG_CMD_GPIO=y
 CONFIG_CMD_MTD=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_WDT=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
diff --git a/configs/gardena-smart-gateway-mt7688_defconfig b/configs/gardena-smart-gateway-mt7688_defconfig
index ad0db2e723..ad2fbd07f7 100644
--- a/configs/gardena-smart-gateway-mt7688_defconfig
+++ b/configs/gardena-smart-gateway-mt7688_defconfig
@@ -15,6 +15,7 @@ CONFIG_IMAGE_FORMAT_LEGACY=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
@@ -29,6 +30,7 @@ CONFIG_CMD_GPIO=y
 CONFIG_CMD_MTD=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_CMD_WDT=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y