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0858e03b3d
When U-Boot is running from flash memory (execute in place) then gd->fdt_blob before relocation points to read-only flash memory. So U-Boot calls board_fix_fdt() with read-only gd->fdt_blob pointer which cause immediate CPU crash when callback is trying to modify gd->fdt_blob. Fix this issue by introducing a new config option OF_INITIAL_DTB_READONLY which moves fix_fdt callback after the reloc_fdt callback. This makes CONFIG_OF_BOARD_FIXUP working also if U-Boot before relocation is not running from read/write (S)RAM memory. This is required for mpc85xx boards when booting from flash NOR. Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Marek Mojík <marek.mojik@nic.cz> Reviewed-by: Marek Behún <kabel@kernel.org>