linux-kernel - Re: [PATCH 1/3] dt-bindings: dmaengine: Document qcom,gpi dma binding

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Date:   Wed, 26 Aug 2020 12:02:46 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: dmaengine: Document qcom,gpi dma binding

On 25-08-20, 20:21, Vinod Koul wrote:
> Hey Rob,
> 
> On 24-08-20, 11:40, Rob Herring wrote:
> > On Mon, 24 Aug 2020 14:17:10 +0530, Vinod Koul wrote:
> > > Add devicetree binding documentation for GPI DMA controller
> > > implemented on Qualcomm SoCs
> > > 
> > > Signed-off-by: Vinod Koul <vkoul@...nel.org>
> > > ---
> > >  .../devicetree/bindings/dma/qcom-gpi.yaml     | 87 +++++++++++++++++++
> > >  1 file changed, 87 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/dma/qcom-gpi.yaml
> > > 
> > 
> > 
> > My bot found errors running 'make dt_binding_check' on your patch:
> > 
> > /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/dma/qcom-gpi.yaml: properties:qcom,ev-factor: {'description': 'Event ring transfer size compare to channel transfer ring. Event ring length = ev-factor * transfer ring size', 'maxItems': 1} is not valid under any of the given schemas (Possible causes of the failure):
> > 	/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/dma/qcom-gpi.yaml: properties:qcom,ev-factor: 'not' is a required property
> 
> Okay updating dt-schema I do see this, now the question is what is this
> and what does it mean ;-) I am not sure I comprehend the error message.
> I see this for all the new properties I added as required for this
> device node

Okay I think I have figured it out, I need to provide ref to
/schemas/types.yaml#definitions/uint32 for this to work, which does
makes sense to me.

  qcom,max-num-gpii:
    $ref: /schemas/types.yaml#definitions/uint32
    maxItems: 1
    description:
      Number of GPII instances

Looks good to schema tool
 
-- 
~Vinod