[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 at kernel.org>
>> ---
>> 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@kernel.org/
>> ---
>>   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