linux-kernel - Re: [PATCH v4 1/4] dt-bindings: arm: qcom: update beryllium compatible property

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Date:   Tue, 30 Aug 2022 13:00:23 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Joel Selvaraj <joelselvaraj.oss@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org
Subject: Re: [PATCH v4 1/4] dt-bindings: arm: qcom: update beryllium
 compatible property

On 28/08/2022 23:57, Joel Selvaraj wrote:
> There are two panel variants of Xiaomi Poco F1. Tianma and EBBG panel.
> The previous beryllium dts supported the Tianma variant. In order to
> add support for EBBG variant, the common nodes from beryllium dts are
> moved to a new common dtsi and to make the variants distinguishable,
> sdm845-xiaomi-beryllium.dts is now named as
> sdm845-xiaomi-beryllium-tianma.dts. The board's model and compatible
> properties are also renamed to distinguish between the variants.
> So update the dt-bindings to reflect the new compatible value.
> 
> Signed-off-by: Joel Selvaraj <joelselvaraj.oss@...il.com>
> ---
>  Documentation/devicetree/bindings/arm/qcom.yaml | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml b/Documentation/devicetree/bindings/arm/qcom.yaml
> index fb1d00bcc847..e465ca45c07f 100644
> --- a/Documentation/devicetree/bindings/arm/qcom.yaml
> +++ b/Documentation/devicetree/bindings/arm/qcom.yaml
> @@ -666,7 +666,7 @@ properties:
>                - sony,akatsuki-row
>                - sony,apollo-row
>                - thundercomm,db845c
> -              - xiaomi,beryllium
> +              - xiaomi,beryllium-tianma

The board compatibles are not that important for ABI yet this creates
precedence, so I am against it. Simple renaming should not be a reason
to change compatibles.

Best regards,
Krzysztof