linux-kernel - Re: [PATCH] dt-bindings: remoteproc: Add missing (unevaluated|additional)Properties on child nodes

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Date:   Thu, 25 Aug 2022 08:13:24 -0500
From:   Rob Herring <robh@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Sibi Sankar <quic_sibis@...cinc.com>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM" 
        <linux-remoteproc@...r.kernel.org>, devicetree@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: remoteproc: Add missing (unevaluated|additional)Properties
 on child nodes

On Thu, Aug 25, 2022 at 3:23 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 23/08/2022 17:56, Rob Herring wrote:
> > In order to ensure only documented properties are present, node schemas
> > must have unevaluatedProperties or additionalProperties set to false
> > (typically).
> >
> > Signed-off-by: Rob Herring <robh@...nel.org>
> > ---
> >  .../devicetree/bindings/remoteproc/qcom,sc7180-mss-pil.yaml      | 1 +
> >  .../devicetree/bindings/remoteproc/qcom,sc7280-mss-pil.yaml      | 1 +
> >  .../devicetree/bindings/remoteproc/qcom,sc7280-wpss-pil.yaml     | 1 +
> >  3 files changed, 3 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,sc7180-mss-pil.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,sc7180-mss-pil.yaml
> > index e76c861165dd..e4a7da8020f4 100644
> > --- a/Documentation/devicetree/bindings/remoteproc/qcom,sc7180-mss-pil.yaml
> > +++ b/Documentation/devicetree/bindings/remoteproc/qcom,sc7180-mss-pil.yaml
> > @@ -140,6 +140,7 @@ properties:
> >
> >    glink-edge:
> >      $ref: qcom,glink-edge.yaml#
> > +    unevaluatedProperties: false
>
> Is it actually needed? The qcom,glink-edge.yaml has
> additionalProperties:false, so I expect it to complain if anything
> appears here.

Perhaps not, but I'm trying to come up with a meta-schema to check
these though I'm not sure I can get to no warnings which is how I
found all these cases. The main remaining warnings are bus child node
pattern schemas which can perhaps be handled with
'additionalProperties: true'. The rule I have says if properties or
patternProperties is present then unevaluatedProperties or
additionalProperties must be. To handle this case, I think we'd have
to walk the $ref and check it.

Anyways, we can hold off on this one until when and if there's a
meta-schema in place.

Rob