[PATCH RESEND] powerpc: dts: Build devicetrees of enabled platforms

[J. Neuschäfer]

On Tue, Mar 03, 2026 at 10:34:26PM +0100, Geert Uytterhoeven wrote:
> Hi J,
> 
> On Tue, 3 Mar 2026 at 16:56, J. Neuschäfer via B4 Relay
> <devnull+j.ne.posteo.net at kernel.org> wrote:
> > From: "J. Neuschäfer" <j.ne at posteo.net>
> >
> > Follow the same approach as other architectures such as Arm or RISC-V,
> > and build devicetrees based on platforms selected in Kconfig. This makes
> > it unnecessary to use CONFIG_OF_ALL_DTBS on PowerPC in order to build
> > DTB files.
> >
> > This makes it easier to use other build and test infrastructure such as
> > `make dtbs_check`, and is a first step towards generating FIT images
> > that include all the relevant DTBs with `make image.fit`.
> >
> > Signed-off-by: J. Neuschäfer <j.ne at posteo.net>
> 
> Thanks for your patch!
> 
> > --- a/arch/powerpc/boot/dts/Makefile
> > +++ b/arch/powerpc/boot/dts/Makefile
> > @@ -3,3 +3,158 @@
> >  subdir-y += fsl
> >
> >  dtb-$(CONFIG_OF_ALL_DTBS) := $(patsubst $(src)/%.dts,%.dtb, $(wildcard $(src)/*.dts))
> > +
> > +# PPC44x platforms
> > +dtb-$(CONFIG_PPC44x_SIMPLE) += \
> > +       arches.dtb \
[...]
> > +       icon.dtb
> > +dtb-$(CONFIG_EBONY) += \
> > +       ebony.dtb
> 
> This fits on a single line (many more below)
> 
> [...]
> 
> > +# MPC5200 platforms
> > +dtb-$(CONFIG_PPC_MPC5200_SIMPLE) += \
[...]
> > +       tqm5200.dtb \
> > +       uc101.dtb
> 
> Even when it wouldn't fit on a single line, having separate
> 
>     dtb-$(CONFIG_FOO) += bar1.dtb
>     dtb-$(CONFIG_FOO) += bar2.dtb
> 
> lines not only makes it a little bit shorter, but avoids the churn of
> adding a backslash to the previous line when adding new entries.

Sounds good, I'll do that for v2.

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> -- 
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds