config ARM_APPENDED_DTB
        bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
        depends on OF && !ZBOOT_ROM && EXPERIMENTAL
        help
          With this option, the boot code will look for a device tree binary
          (DTB) appended to zImage
          (e.g. cat zImage <filename>.dtb > zImage_w_dtb).

          This is meant as a backward compatibility convenience for those
          systems with a bootloader that can't be upgraded to accommodate
          the documented boot protocol using a device tree.

          Beware that there is very little in terms of protection against
          this option being confused by leftover garbage in memory that might
          look like a DTB header after a reboot if no actual DTB is appended
          to zImage.  Do not leave this option active in a production kernel
          if you don't intend to always append a DTB.  Proper passing of the
          location into r2 of a bootloader provided DTB is always preferable
          to this option.