linux-kernel - Re: [PATCH] dt-bindings: arm: qcom: Document additional sku6 for sc7180 pazquel

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Date:   Wed, 20 Jul 2022 08:07:14 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Yunlong Jia <yunlong.jia@....corp-partner.google.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Henry Sun <henrysun@...gle.com>,
        Bob Moragues <moragues@...omium.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: arm: qcom: Document additional sku6 for
 sc7180 pazquel

Hi,

On Wed, Jul 20, 2022 at 12:46 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 20/07/2022 09:38, Yunlong Jia wrote:
> > The difference between sku6 and sku4 is that there is no esim
> >
> > Signed-off-by: Yunlong Jia <yunlong.jia@....corp-partner.google.com>
> > ---
> >
> >  Documentation/devicetree/bindings/arm/qcom.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml b/Documentation/devicetree/bindings/arm/qcom.yaml
> > index 4dd18fbf20b6..aebeefdab27f 100644
> > --- a/Documentation/devicetree/bindings/arm/qcom.yaml
> > +++ b/Documentation/devicetree/bindings/arm/qcom.yaml
> > @@ -410,6 +410,7 @@ properties:
> >        - description: Google Pazquel with LTE and Parade (newest rev)
> >          items:
> >            - const: google,pazquel-sku4
> > +          - const: google,pazquel-sku6
>
> This looks wrong, did you test it?

Why do you think it's wrong? This patch is adding a second compatible
string to an existing dts. The only difference between SKU4 and SKU6
is that one of them has the eSIM component stuffed and the other one
doesn't. This need not be represented in the dts since the eSIM is
automatically detected, but it was still stuffed as a SKU strapping so
the factory could tell whether the missing eSIM was an error or
intentional.

This is just like the SKU0 vs. SKU2 difference.

Other than the fact that this should be together in one series with
the dts patch:

Reviewed-by: Douglas Anderson <dianders@...omium.org>