--- /dev/null
+Not all board variants are represented with a specific defconfig in
+mainline U-Boot. Here a small documentation on how to generate U-Boot
+images for all other board variants, available via different dts
+files and defconfigs.
+
+Use a different dts than in the defconfig:
+
+make DEVICE_TREE=cn9131-db-B
+
+Use a different boot device (e.g. MMC or NAND instead of SPI NOR):
+
+For MMC, please make the following changes to the defconfig via
+e.g. "make menuconfig":
+Remove CONFIG_MVEBU_SPI_BOOT
+Select CONFIG_MVEBU_MMC_BOOT
+Remove CONFIG_ENV_IS_IN_SPI_FLASH
+Select CONFIG_ENV_IS_IN_MMC
+
+For NAND, please make the following changes to the defconfig via
+e.g. "make menuconfig":
+Remove CONFIG_MVEBU_SPI_BOOT
+Select CONFIG_MVEBU_NAND_BOOT
+Remove CONFIG_ENV_IS_IN_SPI_FLASH
+Select CONFIG_ENV_IS_IN_NAND
--- /dev/null
+CONFIG_ARM=y
+CONFIG_ARCH_CPU_INIT=y
+CONFIG_ARCH_MVEBU=y
+CONFIG_SYS_TEXT_BASE=0x00000000
+CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_TARGET_OCTEONTX2_CN913x=y
+CONFIG_ENV_SIZE=0x10000
+CONFIG_ENV_OFFSET=0x3f0000
+CONFIG_ENV_SECT_SIZE=0x10000
+CONFIG_DM_GPIO=y
+CONFIG_DEBUG_UART_BASE=0xf0512000
+CONFIG_DEBUG_UART_CLOCK=200000000
+CONFIG_DEFAULT_DEVICE_TREE="cn9130-db-A"
+CONFIG_DEBUG_UART=y
+CONFIG_AHCI=y
+CONFIG_DISTRO_DEFAULTS=y
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_USE_PREBOOT=y
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_ARCH_EARLY_INIT_R=y
+CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_SYS_PROMPT="Marvell>> "
+CONFIG_CMD_I2C=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_MTD=y
+CONFIG_CMD_PCI=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_USB=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_TFTPPUT=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_MVEBU_BUBT=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_MAC_PARTITION=y
+CONFIG_ENV_OVERWRITE=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_SYS_MMC_ENV_DEV=1
+CONFIG_AHCI_MVEBU=y
+CONFIG_DM_GPIO_LOOKUP_LABEL=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_MVTWSI=y
+CONFIG_MISC=y
+CONFIG_MVEBU_SAR=y
+CONFIG_MMC_BROKEN_CD=y
+CONFIG_DM_MMC=y
+CONFIG_MMC_HS200_SUPPORT=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_XENON=y
+CONFIG_MTD=y
+CONFIG_MTD_RAW_NAND=y
+CONFIG_SYS_NAND_USE_FLASH_BBT=y
+CONFIG_NAND_PXA3XX=y
+CONFIG_SF_DEFAULT_MODE=0
+CONFIG_SPI_FLASH_SFDP_SUPPORT=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_SST=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
+CONFIG_PHY_MARVELL=y
+CONFIG_PHY_GIGE=y
+CONFIG_MVPP2=y
+CONFIG_NVME=y
+CONFIG_PCI=y
+CONFIG_DM_PCI=y
+CONFIG_PCIE_DW_MVEBU=y
+CONFIG_MVEBU_COMPHY_SUPPORT=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_ARMADA_8K=y
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_DEBUG_UART_ANNOUNCE=y
+CONFIG_SYS_NS16550=y
+CONFIG_KIRKWOOD_SPI=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_HOST_ETHER=y
+CONFIG_USB_ETHER_ASIX=y
+CONFIG_USB_ETHER_MCS7830=y
+CONFIG_USB_ETHER_RTL8152=y
+CONFIG_USB_ETHER_SMSC95XX=y