uboot/configs/meesc_dataflash_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=0x2d000
   7CONFIG_SYS_MALLOC_F_LEN=0x2000
   8CONFIG_TARGET_MEESC=y
   9CONFIG_NR_DRAM_BANKS=1
  10CONFIG_ENV_SIZE=0x4200
  11CONFIG_ENV_OFFSET=0x4200
  12CONFIG_ENV_SECT_SIZE=0x210
  13CONFIG_DM_GPIO=y
  14CONFIG_DEFAULT_DEVICE_TREE="at91sam9263ek"
  15CONFIG_SYS_LOAD_ADDR=0x20100000
  16CONFIG_FIT=y
  17CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9263,SYS_USE_DATAFLASH"
  18CONFIG_BOOTDELAY=3
  19CONFIG_USE_PREBOOT=y
  20CONFIG_BOARD_EARLY_INIT_F=y
  21CONFIG_MISC_INIT_R=y
  22CONFIG_HUSH_PARSER=y
  23# CONFIG_CMD_BDI is not set
  24CONFIG_CMD_BOOTZ=y
  25# CONFIG_CMD_LOADS is not set
  26# CONFIG_CMD_SETEXPR is not set
  27CONFIG_CMD_DHCP=y
  28CONFIG_CMD_PING=y
  29CONFIG_OF_CONTROL=y
  30CONFIG_ENV_IS_IN_SPI_FLASH=y
  31CONFIG_USE_ENV_SPI_MAX_HZ=y
  32CONFIG_ENV_SPI_MAX_HZ=15000000
  33CONFIG_SYS_RELOC_GD_ENV_ADDR=y
  34CONFIG_DM=y
  35CONFIG_CLK=y
  36CONFIG_CLK_AT91=y
  37CONFIG_AT91_GPIO=y
  38# CONFIG_MMC is not set
  39CONFIG_MTD=y
  40CONFIG_DM_SPI_FLASH=y
  41CONFIG_SPI_FLASH_ATMEL=y
  42CONFIG_SPI_FLASH_DATAFLASH=y
  43CONFIG_MACB=y
  44CONFIG_PINCTRL=y
  45CONFIG_PINCTRL_AT91=y
  46CONFIG_DM_SERIAL=y
  47CONFIG_ATMEL_USART=y
  48CONFIG_SPI=y
  49CONFIG_DM_SPI=y
  50