[U-Boot] [PATCH 19/26] configs: mx6sabresd: Add SPL FIT and DM support

[Abel Vesa]

On 19-01-18 13:16:07, Fabio Estevam wrote:
> Hi Abel,
> 
> On Fri, Jan 18, 2019 at 12:59 PM Abel Vesa <abel.vesa at nxp.com> wrote:
> 
> > +CONFIG_OF_CONTROL=y
> > +CONFIG_SPL_OF_CONTROL=y
> > +CONFIG_DEFAULT_DEVICE_TREE="imx6q-sabresd"
> 
> Does this mean that only imx6q-sabresd variant is supported after this
> series is applied?
> 
> We still need to support imx6dl/imx6qp sabresd in the same binary as
> we currently do today.

Hmmm, so all the dtbs get built, trouble is we need to specify which dtb gets
used by SPL. This is why the DEFAULT_DEVICE_TREE gets set.

A solution to do what you're asking is to have a dtb in SPL that works for
all socs (dl/qp/q) for each board (sabreauto/sabresd). I'm afraid it might
get too big to fit in sram. I'll give it a try tomorrow.

As for the u-boot proper, in order to have one u-boot.itb file that works
on all socs we need to support MULTI_FIT in u-boot proper and make u-boot
chose from the fit table the right dtb. I'll try to do that for the next
version of this patchset. I'll keep you up to date with the development.