linux-kernel - Re: [PATCH] dt-bindings: clock: ti: Convert interface.txt to json-schema

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Date:   Fri, 1 Dec 2023 15:41:12 +0100
From:   Andreas Kemnade <andreas@...nade.info>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     mturquette@...libre.com, sboyd@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        kristo@...nel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-omap@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: clock: ti: Convert interface.txt to
 json-schema

On Fri, 1 Dec 2023 15:17:46 +0100
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:

> On 01/12/2023 15:09, Andreas Kemnade wrote:
> > Am Wed, 29 Nov 2023 09:15:57 +0100
> > schrieb Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>:
> >   
> >> On 28/11/2023 21:41, Andreas Kemnade wrote:  
> >>> Am Tue, 28 Nov 2023 09:41:23 +0100
> >>> schrieb Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>:    
> >>>>> If the interface clock is not below a ti,clksel then we have reg.
> >>>>>      
> >>>>
> >>>> This should be expressed in the bindings. It's fine to make the reg
> >>>> optional (skip the description, it's confusing), but the ti,clksel
> >>>> should reference this schema and enforce it on the children.
> >>>>    
> >>> Well there are other compatibles below ti,clksel, too, so should we
> >>> rather add them when the other .txt files are converted?    
> >>
> >> This binding should already be referenced by ti,clksel. When the other
> >> are ready, you will change additionalProperties from object to false.
> >>  
> > I played around with it:
> > 
> > --- a/Documentation/devicetree/bindings/clock/ti/ti,clksel.yaml
> > +++ b/Documentation/devicetree/bindings/clock/ti/ti,clksel.yaml
> > @@ -33,6 +33,11 @@ properties:
> >      const: 2
> >      description: The CLKSEL register and bit offset
> >  
> > +patternProperties:
> > +  "-ick$":
> > +    $ref: /schemas/clock/ti/ti,interface-clock.yaml#
> > +    type: object
> > +
> >  required:
> >    - compatible
> >    - reg
> > 
> >  
> > That generates warnings, which look more serious than just a
> > non-converted compatible, so lowering the overall "signal-noise-ratio".
> > 
> > e.g.
> > from schema $id:
> > http://devicetree.org/schemas/clock/ti/ti,clksel.yaml#
> > /home/andi/linux-dtbs/arch/arm/boot/dts/ti/omap/omap3-overo-tobiduo.dtb:
> > clock@c40: clock-rm-ick: 'ti,index-starts-at-one', 'ti,max-div' do not
> > match any of the regexes: 'pinctrl-[0-9]+'
> > 
> > I think we should rather postpone such referencing.  
> 
> Are you sure in such case that your binding is correct? The warnings
> suggest that not, therefore please do not postpone.
> 
well, there is not only stuff from clock/ti/ti,interface.yaml but also from
clock/ti/divider.txt below ti,clksel. So I have one warning about the missing
compatible there and also about the properties belonging to that compatible.

Regards,
Andreas