linux-kernel - Re: [PATCH] arm64: dts: marvell: Fix compatible strings for Armada 3720 boards

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Message-ID: <20220714093605.wdyrcxehg2ij5lvx@pali>
Date:   Thu, 14 Jul 2022 11:36:05 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: marvell: Fix compatible strings for Armada
 3720 boards

On Thursday 14 July 2022 08:56:12 Krzysztof Kozlowski wrote:
> On 13/07/2022 22:03, Pali Rohár wrote:
> > On Wednesday 13 July 2022 21:42:43 Krzysztof Kozlowski wrote:
> >> On 13/07/2022 14:56, Pali Rohár wrote:
> >>> All Armada 3720 boards have Armada 3720 processor which is of Armada 3700
> >>> family and do not have Armada 3710 processor. So none of them should have
> >>> compatible string for Armada 3710 processor.
> >>>
> >>> Fix compatible string for all these boards by removing wrong processor
> >>> string "marvell,armada3710" and adding family string "marvell,armada3700"
> >>> as the last one. (Note that this is same way how are defined Armada 3710
> >>> DTS files).
> >>
> >> Please do not introduce some changes just in DTS, but start from the
> >> bindings. Someone wrote the bindings like that and expected to be that
> >> way, so first change the bindings with proper rationale. Then change the
> >> DTS files.
> >>
> >>
> >> Best regards,
> >> Krzysztof
> > 
> > Ok, I tried to update bindings and fix example in it, see patch:
> > https://lore.kernel.org/linux-devicetree/20220713200123.22612-1-pali@kernel.org/
> 
> The reason you used here should be expressed in that commit as well

Which I exactly did (Armada 3700 = famity, Armada 3720 = SoC, Armada
3720 DB is name of the board with Armada 3720 SoC, so correctly indicate
SoC in example). So what else?

> because you change the ABI and affect other users (projects, systems).
> 
> Best regards,
> Krzysztof