linux-kernel - Re: [PATCH 2/3] dt-bindings: arm: Add SolidRun LX2162A SoM & Clearfog Board

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Date:   Fri, 16 Jun 2023 18:57:28 +0200
From:   Andreas Kemnade <andreas@...nade.info>
To:     Josua Mayer <josua@...id-run.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Li Yang <leoyang.li@....com>, Marek Vasut <marex@...x.de>,
        Fabio Estevam <festevam@...x.de>,
        Stefan Wahren <stefan.wahren@...rgebyte.com>,
        Frieder Schrempf <frieder.schrempf@...tron.de>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>
Subject: Re: [PATCH 2/3] dt-bindings: arm: Add SolidRun LX2162A SoM &
 Clearfog Board

On Fri, 16 Jun 2023 16:32:01 +0300
Josua Mayer <josua@...id-run.com> wrote:

> HI Krzysztof,
> 
> Am 16.06.23 um 14:36 schrieb Krzysztof Kozlowski:
> > On 16/06/2023 13:06, Josua Mayer wrote:  
> >> Add DT compatible for SolidRun LX2162A SoM and Clearfog board.
> >>
> >> Signed-off-by: Josua Mayer <josua@...id-run.com>
> >> ---
> >>   Documentation/devicetree/bindings/arm/fsl.yaml | 2 ++
> >>   1 file changed, 2 insertions(+)
> >>
> >> diff --git a/Documentation/devicetree/bindings/arm/fsl.yaml b/Documentation/devicetree/bindings/arm/fsl.yaml
> >> index 15d411084065..438a4ece8157 100644
> >> --- a/Documentation/devicetree/bindings/arm/fsl.yaml
> >> +++ b/Documentation/devicetree/bindings/arm/fsl.yaml
> >> @@ -1373,9 +1373,11 @@ properties:
> >>         - description: SolidRun LX2160A based Boards
> >>           items:
> >>             - enum:
> >> +              - solidrun,clearfog
> >>                 - solidrun,clearfog-cx
> >>                 - solidrun,honeycomb
> >>             - const: solidrun,lx2160a-cex7
> >> +          - const: solidrun,lx2162a-som
> >>             - const: fsl,lx2160a  
> > You change existing entries, breaking boards and changing the meaning,
> > without any explanation in commit msg. That's not how it is done. Please
> > provide rationale in commit msg.  
> 
> I'm sorry. Given your comment I think I did not understand how these 
> entries are supposed to work.
> So perhaps you can provide some guidance based on my explanation?:
> 

it breaks:
arm64/boot/dts/freescale/fsl-lx2160a-clearfog-cx.dts
compatible = "solidrun,clearfog-cx",
                "solidrun,lx2160a-cex7", "fsl,lx2160a";

now you would require:
compatible = "solidrun,clearfog-cx",
                "solidrun,lx2160a-cex7", "solidrun,lx2162a-som", "fsl,lx2160a"

which is probably not what you want.

Regards,
Andreas