mvebu/x530: Difference between spl/u-boot-spl.bin and spl/u-boot-spl-dtb.bin

[Pali Rohár]

On Thursday 07 October 2021 21:09:40 Chris Packham wrote:
> On Thu, Oct 7, 2021 at 1:38 AM Pali Rohár <pali at kernel.org> wrote:
> >
> > Hello!
> >
> > I would like to ask, what is the difference between spl/u-boot-spl.bin
> > and spl/u-boot-spl-dtb.bin binaries?
> 
> The latter has a dtb appended. But I can't recall the x530
> specifically needing to be different to the other platforms... sure
> enough all the a385 boards the time the x530 was added used
> spl/u-boot-spl-dtb.bin.

I have checked that A385 Omnia board has these two files same. So seems
that both files for this board have DTB appended.

> > Because there is board/alliedtelesis/x530/kwbimage.cfg file which
> > overrides global file arch/arm/mach-mvebu/kwbimage.cfg.in and the only
> > difference between these files is that board specific file uses
> > spl/u-boot-spl-dtb.bin instead of spl/u-boot-spl.bin.
> 
> I think the real source of the discrepancy is that the addition of the
> x530 board was in flight at the same time as ca1a4c863232 ("mvebu:
> select boot device at SoC level"). I don't know of any reason
> specifically that the x530 needs to be different. If I get a chance
> I'll try it without a custom kwbimage.cfg.

Ok. If you have a time, please check if default kwbimage.cfg works. It
could simplify build.