linux-kernel - Re: [PATCH 3/7] dt-bindings: interconnect: qcom: Fix and separate out MSM8916

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Message-ID: <992b69a5-3fa9-ada3-a7bd-1c596cac9487@linaro.org>
Date:   Sat, 22 Jul 2023 11:38:40 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Shawn Guo <shawn.guo@...aro.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/7] dt-bindings: interconnect: qcom: Fix and separate out
 MSM8916

On 21/07/2023 15:54, Konrad Dybcio wrote:
> Separate out MSM8916 icc bindings and fix the clocks description by
> removing the wrong internal RPM bus clock representation that we've
> been carrying for years.
> 
> Replace the example in qcom,rpm.yaml with MSM8939 to keep it relevant
> to the file.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  .../bindings/interconnect/qcom,msm8916.yaml        | 52 ++++++++++++++++++++++
>  .../devicetree/bindings/interconnect/qcom,rpm.yaml | 24 +++++-----
>  2 files changed, 65 insertions(+), 11 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/interconnect/qcom,msm8916.yaml b/Documentation/devicetree/bindings/interconnect/qcom,msm8916.yaml
> new file mode 100644
> index 000000000000..49baf808c087
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interconnect/qcom,msm8916.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/interconnect/qcom,msm8916.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm MSM8916 Network-On-Chip interconnect
> +
> +maintainers:
> +  - Konrad Dybcio <konradybcio@...nel.org>
> +
> +description: |
> +  The Qualcomm MSM8916 interconnect providers support adjusting the
> +  bandwidth requirements between the various NoC fabrics.
> +
> +allOf:
> +  - $ref: qcom,rpm-common.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,msm8916-bimc
> +      - qcom,msm8916-pcnoc
> +      - qcom,msm8916-snoc
> +

Keeping reg here also makes it nicely aligned with required: (property
and required are both in one file)

> +required:
> +  - compatible
> +  - reg
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,rpmcc.h>
> +
> +    snoc: interconnect@...000 {
> +        compatible = "qcom,msm8916-snoc";
> +        reg = <0x00580000 0x14000>;
> +        #interconnect-cells = <1>;
> +    };
> +
> +    pcnoc: interconnect@...000 {
> +        compatible = "qcom,msm8916-pcnoc";
> +        reg = <0x00500000 0x11000>;
> +        #interconnect-cells = <1>;
> +    };
> +
> +    bimc: interconnect@...000 {
> +        compatible = "qcom,msm8916-bimc";
> +        reg = <0x00400000 0x62000>;
> +        #interconnect-cells = <1>;
> +    };

Just keep one example.

> diff --git a/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml b/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml
> index 4f95d512012a..788c5e88445a 100644
> --- a/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml
> +++ b/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml
> @@ -20,9 +20,6 @@ properties:
>  
>    compatible:
>      enum:
> -      - qcom,msm8916-bimc
> -      - qcom,msm8916-pcnoc
> -      - qcom,msm8916-snoc
>        - qcom,msm8939-bimc
>        - qcom,msm8939-pcnoc
>        - qcom,msm8939-snoc
> @@ -109,9 +106,6 @@ allOf:
>          compatible:
>            contains:
>              enum:
> -              - qcom,msm8916-bimc
> -              - qcom,msm8916-pcnoc
> -              - qcom,msm8916-snoc
>                - qcom,msm8939-bimc
>                - qcom,msm8939-pcnoc
>                - qcom,msm8939-snoc
> @@ -254,7 +248,7 @@ examples:
>        #include <dt-bindings/clock/qcom,rpmcc.h>
>  
>        bimc: interconnect@...000 {
> -              compatible = "qcom,msm8916-bimc";
> +              compatible = "qcom,msm8939-bimc";
>                reg = <0x00400000 0x62000>;
>                #interconnect-cells = <1>;
>                clock-names = "bus", "bus_a";
> @@ -263,7 +257,7 @@ examples:
>        };
>  
>        pcnoc: interconnect@...000 {
> -              compatible = "qcom,msm8916-pcnoc";
> +              compatible = "qcom,msm8939-pcnoc";
>                reg = <0x00500000 0x11000>;
>                #interconnect-cells = <1>;
>                clock-names = "bus", "bus_a";

This part makes little sense since you remove the file few patches
later. I suggest reverse the order of patches. Split out first the oones
without examples (like 8939), so the last step is kind of rename.


Best regards,
Krzysztof