linux-kernel - Re: [PATCH 1/2] dt-bindings: remoteproc: mediatek: Fix optional reg-names for mtk,scp

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Date:   Tue, 3 May 2022 13:58:46 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, kernel@...labora.com,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Tinghan Shen <tinghan.shen@...iatek.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: remoteproc: mediatek: Fix optional
 reg-names for mtk,scp

On Tue, May 03, 2022 at 02:19:39PM +0200, Krzysztof Kozlowski wrote:
> On 29/04/2022 23:11, Nícolas F. R. A. Prado wrote:
> > The SCP has three memory regions: sram, l1tcm and cfg. Only sram is
> > required, the other two are optional. Fix the dt-binding so that the
> > optional regions can be omitted and passed in any order.
> 
> No, cannot be passed in any order.
> 
> > 
> > Also add the missing minItems to the reg property and update the
> > description.
> > 
> > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
> > 
> > ---
> > 
> >  .../devicetree/bindings/remoteproc/mtk,scp.yaml      | 12 +++++++++---
> >  1 file changed, 9 insertions(+), 3 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> > index 823a236242de..ec9ddeb6ca2c 100644
> > --- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> > +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
> > @@ -24,14 +24,20 @@ properties:
> >    reg:
> >      description:
> >        Should contain the address ranges for memory regions SRAM, CFG, and
> > -      L1TCM.
> > +      L1TCM. Only SRAM is required, while CFG and L1TCM are optional.
> > +    minItems: 1
> >      maxItems: 3
> >  
> >    reg-names:
> > +    minItems: 1
> >      items:
> >        - const: sram
> > -      - const: cfg
> > -      - const: l1tcm
> > +      - enum:
> > +          - l1tcm
> > +          - cfg
> > +      - enum:
> > +          - l1tcm
> > +          - cfg
> 
> This allows them in any combination which is not what we want. If both
> are optional and both can appear, then last should be a const:l1tcm.

Hi Krzysztof,

yes, that's the case. I'll update it in v3 then.

Thanks,
Nícolas

> 
> Best regards,
> Krzysztof