[U-Boot] is it mandatory for SPL to support DM

[Simon Glass]

Hi Marek,

On Mon, 25 May 2020 at 09:43, Marek Vasut <marex at denx.de> wrote:
>
> On 5/25/20 5:36 PM, Simon Glass wrote:
> > Hi,
> >
> > On Mon, 25 May 2020 at 04:35, Marek Vasut <marex at denx.de> wrote:
> >>
> >> On 5/25/20 10:44 AM, Jagan Teki wrote:
> >>> SPL has a foot-print constraint, so fully switching a particular
> >>> subsystem like SPI or SPI Flash to DM would increase the size of it.
> >>>
> >>> Possible areas to look at are (assume SPL_DM supported)
> >>> 1) platdata
> >>> 2) implement board or platform specific spl device driver which
> >>> bypassed the actual framework ex: spl_spi_sunxi.c
> >>>
> >>> Do we have any other solutions? or any arguments on above step 2?
> >>
> >> SPL does not need to support DM until the size problem is solved.
> >
> > I don't think the problem will ever be 'solved'. It is an ongoing battle.
> >
> > But as it happens I've just sent a proposal for tiny-dm that I think will help.
> >
> > Jagan, which board are you trying to convert? If you are trying to
> > convert SPI flash, I think we need to remove the legacy code first.
>
> If you want a board which boots from SPI NOR and has some 14k or so
> limit on SPL, any of the R-Car Gen2 boards fit the bill.

Thanks...do you have a link to one?

Also was there a 64-bit board that had to run 64-bit SPL? I think I
remember you mentioning it.

Regards,
Simon