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

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Message-ID: <20220704130712.GD659023@leoy-ThinkPad-X240s>
Date:   Mon, 4 Jul 2022 21:07:12 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     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 Mon, Jul 04, 2022 at 02:47:13PM +0200, Krzysztof Kozlowski wrote:
> 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.

I referred other DT binding file for adding $ref to specify property
type [1], so it's confused why it's pointless, anyway, I can drop $ref
in next spin.

Thanks a lot for the review!

Leo

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/arm/l2c2x0.yaml#n153