linux-kernel - Re: [PATCH] ARM: dts: intel: Drop pxa2xx

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Message-ID: <700e5050-aebe-4ca4-b02d-8ffacccf7045@zonque.org>
Date: Thu, 18 Dec 2025 09:21:29 +0100
From: Daniel <daniel@...que.org>
To: Arnd Bergmann <arnd@...db.de>, Robert Jarzmik <robert.jarzmik@...e.fr>,
 Rob Herring <robh@...nel.org>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>,
 Magnus Damm <magnus.damm@...il.com>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
 Haojian Zhuang <haojian.zhuang@...il.com>, Andrew Lunn <andrew@...n.ch>,
 Gregory Clement <gregory.clement@...tlin.com>,
 Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
 Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: dts: intel: Drop pxa2xx

Hi,

On 12/17/25 17:04, Arnd Bergmann wrote:
> On Fri, Dec 12, 2025, at 22:58, Robert Jarzmik wrote:
>> "Rob Herring (Arm)" <robh@...nel.org> writes:
>>
>>> These .dtsi files are not included anywhere in the tree and 
>>> can't be tested. They have not been touched since 2018 other than 
>>> clean-ups.
>>>
>> And yet, there are used by people using pxa2xx board with an DT 
>> support (like the mioa701 for which a board file was never merged).
>>
>> If you remove pxa25x.dtsi and pxa27x.dtsi, you might as well 
>> remove all support for this architecture from the kernel, as
>> these are the building blocks needed to make it work.
>>
>> That might be what should be done, I'll let Arnd and Daniel 
>> comment on the future of PXA in the kernel.
> 
> I agree with Rob that at the very minimum, any dtsi files in the
> kernel should be build-tested along with the rest, so either
> we add some dts files using them soon, or we can remove pxa2xx
> (and maybe pxa3xx) completely.

PXA3xx is in use by the Raumfeld boards, and I would really like to keep
them around.

For PXA2xx I'm torn. I don't have the capacity and hardware to work on
those, but I don't know how many users are out there with out-of-tree
dts files.

> I already plan to remove the remaining board files for both
> sa1100 and pxa soon, as nobody has picked up the task to do
> any further DT conversion after we removed the majority of
> the files back in 2022 and left only the ones that someone
> said they'd be interested in keeping.
>
> Robert, let me know if you or someone else is able to spend
> some time on sending (warning-free) dts files for pxa2xx
> machines soon. If not, I'd plan to remove whatever is there
> along with the board files and drivers.
> 
> I also checked the pxa3xx Raumfeld devicetree support that
> Daniel added in linux-3.7. The manufacturer's firmware
> download page contains kernel images based on this work,
> using a 4.19 kernel but built in 2022. If we remove pxa2xx
> DT support, it would be good to find out if anyone still
> plans to use something newer on that hardware, which may
> happen because of CRA requirements.

As I said, I would like to not close the door on this one if possible.


Thanks,
Daniel