board/firefly/firefly-rk3288/sd-image.cfg

image sdcard.img {
  hdimage {
  }

  partition u-boot-spl-dtb {
    in-partition-table = "no"
    image = "u-boot-spl-dtb.img"
    offset = 32K
  }

  partition u-boot-dtb {
    in-partition-table = "no"
    image = "u-boot-dtb.img"
    offset = 128K
  }

  partition rootfs {
    partition-type = 0x83
    image = "rootfs.ext4"
    size = 512M
  }
}