1CONFIG_BASE_DEFCONFIG="rv1126_defconfig" 2CONFIG_CMD_DFU=y 3CONFIG_DFU_MMC=y 4CONFIG_DFU_MTD=y 5# CONFIG_DFU_NAND is not set 6# CONFIG_DFU_RAM is not set 7# CONFIG_DFU_SF is not set 8# CONFIG_DFU_TFTP is not set 9CONFIG_USB_FUNCTION_DFU=y 10