linux-kernel - Re: [PATCH v3 1/5] dt-bindings: interconnect: Update property for icc-rpm path tag

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Date:   Mon, 4 Jul 2022 14:47:13 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Leo Yan <leo.yan@...aro.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH v3 1/5] dt-bindings: interconnect: Update property for
 icc-rpm path tag

On 04/07/2022 11:30, Leo Yan wrote:
> To support path tag in icc-rpm driver, the "#interconnect-cells"
> property is updated as enumerate values: 1 or 2.  Setting to 1 means
> it is compatible with old DT binding that interconnect path only
> contains node id; if set to 2 for "#interconnect-cells" property, then
> the second specifier is used as a tag (e.g. vote for which buckets).
> 
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  .../devicetree/bindings/interconnect/qcom,rpm.yaml         | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml b/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml
> index 8a676fef8c1d..cdfe419e7339 100644
> --- a/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml
> +++ b/Documentation/devicetree/bindings/interconnect/qcom,rpm.yaml
> @@ -45,7 +45,12 @@ properties:
>        - qcom,sdm660-snoc
>  
>    '#interconnect-cells':
> -    const: 1
> +    description: |
> +      Number of interconnect specifier. Value: <1> is one cell in a
> +      interconnect specifier for the interconnect node id, <2> requires
> +      the interconnect node id and an extra path tag.
> +    $ref: /schemas/types.yaml#/definitions/uint32

Ah, too fast.  No ack. This ref is also pointless and not explained in
commit msg.

> +    enum: [ 1, 2 ]
>  
>    clocks:
>      minItems: 2


Best regards,
Krzysztof