[PATCH] scripts/Makefile.dts: tweak logic for deciding which dtbs to build

[Simon Glass]

On Thu, 4 May 2023 at 09:51, Tom Rini <trini at konsulko.com> wrote:
>
> On Thu, May 04, 2023 at 01:33:08PM +0200, Rasmus Villemoes wrote:
>
> > The idea in 3609e1dc5f4d (dts: automatically build necessary .dtb
> > files) was fine, but the implementation was suboptimal due to some
> > misunderstandings on my part (and possibly defects in some defconfig
> > files):
> >
> > - Sometimes DEFAULT_DEVICE_TREE is not included in OF_LIST or
> >   SPL_OF_LIST
> >
> > - SPL_OF_LIST is not always a subset of OF_LIST
> >
> > - While SPL_OF_LIST governs the list of dtbs relevant to SPL (i.e.,
> >   may be built into an
> >   SPL-with-bunch-of-dtbs-to-choose-between-at-runtime), those dtbs are
> >   not actually _built_ during the SPL build phase, i.e. when $(SPL_)
> >   would expand to SPL_. fdtgrep runs on the artifacts produced during
> >   the ordinary U-Boot build.
> >
> > Tweak the logic so that we simply add the union of all dtbs mentioned
> > in either DEFAULT_DEVICE_TREE, OF_LIST and SPL_OF_LIST to dtb-y. That
> > should, for real, ensure that we always build all the dtbs that is
> > relevant to the current board, and should in turn enable us to
> > massively simplify arch/*/dts/Makefile.
> >
> > Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
>
> Tested-by: Tom Rini <trini at konsulko.com>

Reviewed-by: Simon Glass <sjg at chromium.org>