Re: [RFC PATCH] arm64: broadcom: bcm2712: Rework rp1 overlay handling

[Florian Fainelli]

On 12/5/25 00:08, Krzysztof Kozlowski wrote:
> On 17/11/2025 22:15, Rob Herring (Arm) wrote:
> > It's a requirement that DT overlays be applied at build time in order to
> > validate them as overlays are not validated on their own.
> >
> > Simply adding a build time target is possible, but it's also not desirable
> > to have targets which include the overlay contents and apply the same
> > overlay.
> >
> > Rework the targets such that there are 2 overlays: the existing RP1 overlay
> > and the board specific configuration of the RP1 (bcm2712-rpi-5-b.dtso).
> >
> > Signed-off-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
> > ---
> > The missing applying of rp1.dtbo will soon be a warning[1].
> >
> > The comment in bcm2712-rpi-5-b.dts(o) needs updating or removing. The RP1
> > driver or userspace handling of the overlay probably needs updating to
> > handle the 2 overlays. IIRC, I think we can apply overlays to overlays
> > which may be useful here. If not, adding that to the tools should be
> > possible.
> >
> > [1] https://lore.kernel.org/all/20251114222759.4181152-1-robh@xxxxxxxxxx/
> > ---
> >   arch/arm64/boot/dts/broadcom/Makefile                 | 10 ++++++++--
> >   ...m2712-d-rpi-5-b.dts => bcm2712-d-rpi-5-b-base.dts} |  2 +-
> >   .../{bcm2712-rpi-5-b.dts => bcm2712-rpi-5-b.dtso}     | 11 +++++------
>
>
> So now Linus' tree has warnings. Can this be applied by anyone around
> Broadcom and sent as fixes?

It's an RFC and I was hoping to get Andrea to comment on this patch 
before applying.
--
Florian