U-Boot needs to get its device tree from somewhere. This can
be done using one of the three options below:
- CONFIG_OF_EMBED
- If this variable is defined, U-Boot will embed a device tree
- binary in its image. This device tree file should be in the
- board directory and called <soc>-<board>.dts. The binary file
- is then picked up in board_init_f() and made available through
- the global data structure as gd->fdt_blob.
-
CONFIG_OF_SEPARATE
If this variable is defined, U-Boot will build a device tree
binary. It will be called u-boot.dtb. Architecture-specific