uboot/configs/Bananapi_m2m_defconfig
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   1CONFIG_ARM=y
   2CONFIG_ARCH_SUNXI=y
   3CONFIG_DEFAULT_DEVICE_TREE="sun8i-r16-bananapi-m2m"
   4CONFIG_SPL=y
   5CONFIG_MACH_SUN8I_A33=y
   6CONFIG_DRAM_CLK=600
   7CONFIG_DRAM_ZQ=15291
   8CONFIG_DRAM_ODT_EN=y
   9CONFIG_MMC0_CD_PIN="PB4"
  10CONFIG_MMC_SUNXI_SLOT_EXTRA=2
  11CONFIG_USB0_ID_DET="PH8"
  12# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
  13CONFIG_FASTBOOT_CMD_OEM_FORMAT=y
  14CONFIG_USB_EHCI_HCD=y
  15CONFIG_USB_OHCI_HCD=y
  16CONFIG_USB_MUSB_GADGET=y
  17CONFIG_USB_FUNCTION_MASS_STORAGE=y
  18