linux-kernel - Re: [PATCH 1/4] dt-bindings: mfd: stm32f7: add binding definition for CAN3

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Date:   Wed, 17 May 2023 17:23:13 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Marc Kleine-Budde <mkl@...gutronix.de>, Lee Jones <lee@...nel.org>
Cc:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        linux-kernel@...r.kernel.org,
        Amarula patchwork <linux-amarula@...rulasolutions.com>,
        michael@...rulasolutions.com,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-can@...r.kernel.org, oe-kbuild-all@...ts.linux.dev
Subject: Re: [PATCH 1/4] dt-bindings: mfd: stm32f7: add binding definition for
 CAN3

On 17/05/2023 16:16, Marc Kleine-Budde wrote:
> Hey Lee Jones,
> 
> On 24.04.2023 10:02:29, Lee Jones wrote:
>> On Sun, 23 Apr 2023, Dario Binacchi wrote:
>>
>>> Add binding definition for CAN3 peripheral.
>>>
>>> Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
>>> ---
>>>
>>>  include/dt-bindings/mfd/stm32f7-rcc.h | 1 +
>>>  1 file changed, 1 insertion(+)
>>
>> Applied, thanks
> 
> I upstreamed the v2 of this series
> (https://lore.kernel.org/all/20230427204540.3126234-1-dario.binacchi@amarulasolutions.com/)
> that doesn't contain this change to net/main without noticing that the
> DT changes in that series depend on it.
> 
> This broke the DT compilation of the stm32f746.dtsi in the net/main
> tree. I don't see the stm32f7-rcc.h changes in linus/master so I'm
> afraid this will break mainline too :/
> 
> What are the possible solutions? I see:
> 1) revert the stm32f746.dtsi changes via net/main
> 2) upstream the stm32f7-rcc.h changes via net/main, too
> 3) upstream the stm32f7-rcc.h changes via you tree, so that it hits
>    mainline in the v6.4 release cycle.
> 
> I'm in favor of solution number 1. Thoughts?

DTS should never go with driver changes or with driver trees, not only
because it hides ABI breaks but also for above reasons. The best if you
just drop or revert DTS commits, so they can go via platform maintainer.

Best regards,
Krzysztof