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

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Message-Id: <35405ed3-1319-4d3a-84a5-ad67f4c823ad@app.fastmail.com>
Date: Wed, 17 Dec 2025 17:04:05 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "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>, "Daniel Mack" <daniel@...que.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

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.

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.

    Arnd