Hi, On Sun, 28 Aug 2022 at 09:19, Marek Behún <ka...@kernel.org> wrote: > > From: Pali Rohár <p...@kernel.org> > > 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_DTB_READONLY_BEFORE_RELOC 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 <p...@kernel.org> > Signed-off-by: Marek Behún <ka...@kernel.org> > --- > Changes since v1: > - just changed the new Kconfig option name and associated help string > --- > common/board_f.c | 8 +++++++- > dts/Kconfig | 6 ++++++ > 2 files changed, 13 insertions(+), 1 deletion(-)
Can we just make this the normal behaviour? I think it makes more sense to change the FDT after we have relocated it. Regards, Simon
