linux-kernel - Re: [PATCH] dt-bindings: qcom: geni-se: Fix '#address-cells' & '#size-cells' related dt-binding error

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Message-ID: <CAH=2Ntx5rLWu4jzXV8DwKj+yweHPRqb4+Rv8uZpDn_brWDxyJg@mail.gmail.com>
Date:   Mon, 16 Jan 2023 03:03:02 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        linux-kernel@...r.kernel.org, bhupesh.linux@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org
Subject: Re: [PATCH] dt-bindings: qcom: geni-se: Fix '#address-cells' &
 '#size-cells' related dt-binding error

On Sun, 15 Jan 2023 at 20:57, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 13/01/2023 21:10, Bhupesh Sharma wrote:
> > Fix the following '#address-cells' & '#size-cells' related
> > dt-binding error:
> >
> >    $ make dtbs_check
> >
> >    From schema: Documentation/devicetree/bindings/soc/qcom/qcom,geni-se.yaml
> >         arch/arm64/boot/dts/qcom/sm4250-oneplus-billie2.dtb: geniqup@...0000:
> >               #address-cells:0:0: 2 was expected
> >       From schema: Documentation/devicetree/bindings/soc/qcom/qcom,geni-se.yaml
>
> Don't we want rather to unify the soc address range?

Well, the assumption in the original dt-bindings was that every reg
variable is 4 * u32 wide (as most new qcom SoCs set #address- and
#size-cells to <2>). However, that is not the case for all of the
SoCs.

So, ideally we shouldn't set the  "#address-cells" and  "#size-cells":
as const: 2 in the bindings.

See as an example:
https://www.kernel.org/doc/Documentation/devicetree/bindings/usb/usb-device.yaml

Thanks.