uboot/configs/at91sam9g20ek_nandflash_defconfig
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   1CONFIG_ARM=y
   2CONFIG_SKIP_LOWLEVEL_INIT=y
   3CONFIG_ARCH_CPU_INIT=y
   4CONFIG_ARCH_AT91=y
   5CONFIG_SYS_TEXT_BASE=0x21f00000
   6CONFIG_SYS_MALLOC_LEN=0x80000
   7CONFIG_SYS_MALLOC_F_LEN=0x2000
   8CONFIG_TARGET_AT91SAM9260EK=y
   9CONFIG_NR_DRAM_BANKS=1
  10CONFIG_DM_GPIO=y
  11CONFIG_DEFAULT_DEVICE_TREE="at91sam9g20ek"
  12CONFIG_DEBUG_UART_BOARD_INIT=y
  13CONFIG_DEBUG_UART_BASE=0xfffff200
  14CONFIG_DEBUG_UART_CLOCK=132000000
  15CONFIG_ENV_OFFSET_REDUND=0x100000
  16CONFIG_DEBUG_UART=y
  17CONFIG_SYS_LOAD_ADDR=0x22000000
  18CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9G20,SYS_USE_NANDFLASH"
  19CONFIG_BOOTDELAY=3
  20CONFIG_USE_BOOTARGS=y
  21CONFIG_BOOTARGS="console=ttyS0,115200 earlyprintk mtdparts=atmel_nand:256k(bootstrap)ro,512k(uboot)ro,256k(env),256k(env_redundant),256k(spare),512k(dtb),6M(kernel)ro,-(rootfs) root=/dev/mtdblock7 rw rootfstype=jffs2"
  22# CONFIG_DISPLAY_BOARDINFO is not set
  23CONFIG_SYS_PROMPT="U-Boot> "
  24# CONFIG_CMD_BDI is not set
  25CONFIG_CMD_BOOTZ=y
  26# CONFIG_CMD_IMI is not set
  27# CONFIG_CMD_LOADS is not set
  28CONFIG_CMD_NAND=y
  29# CONFIG_CMD_SOURCE is not set
  30# CONFIG_CMD_SETEXPR is not set
  31CONFIG_CMD_DHCP=y
  32CONFIG_CMD_PING=y
  33CONFIG_CMD_FAT=y
  34CONFIG_OF_CONTROL=y
  35CONFIG_ENV_IS_IN_NAND=y
  36CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
  37CONFIG_SYS_RELOC_GD_ENV_ADDR=y
  38CONFIG_DM=y
  39CONFIG_CLK=y
  40CONFIG_CLK_AT91=y
  41CONFIG_AT91_GPIO=y
  42# CONFIG_MMC is not set
  43CONFIG_MTD=y
  44CONFIG_MTD_RAW_NAND=y
  45CONFIG_NAND_ATMEL=y
  46CONFIG_DM_SPI_FLASH=y
  47CONFIG_SPI_FLASH_ATMEL=y
  48CONFIG_SPI_FLASH_DATAFLASH=y
  49CONFIG_DM_ETH=y
  50CONFIG_MACB=y
  51CONFIG_PINCTRL=y
  52CONFIG_PINCTRL_AT91=y
  53CONFIG_DM_SERIAL=y
  54CONFIG_DEBUG_UART_ANNOUNCE=y
  55CONFIG_ATMEL_USART=y
  56CONFIG_SPI=y
  57CONFIG_DM_SPI=y
  58CONFIG_TIMER=y
  59CONFIG_ATMEL_PIT_TIMER=y
  60CONFIG_USB=y
  61