linux-kernel - Re: [PATCH 1/3] dt-bindings: dsp: support imx8ulp dsp clocks

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Message-ID: <20240422142449.GA1186917-robh@kernel.org>
Date: Mon, 22 Apr 2024 09:24:49 -0500
From: Rob Herring <robh@...nel.org>
To: Frank Li <Frank.li@....com>
Cc: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Daniel Baluta <daniel.baluta@....com>,
	Shengjiu Wang <shengjiu.wang@....com>,
	Liu Ying <victor.liu@....com>,
	Laurentiu Mihalcea <laurentiu.mihalcea@....com>,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] dt-bindings: dsp: support imx8ulp dsp clocks

On Thu, Apr 18, 2024 at 05:08:20PM -0400, Frank Li wrote:
> On Thu, Apr 18, 2024 at 11:37:18PM +0300, Laurentiu Mihalcea wrote:
> > From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> > 
> > i.MX8ULP DSP node needs a MU clock, but doesn't need
> > a debug clock. Change "clocks" and "clock-names" properties
> > to allow for this case.
> > 
> > Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> > ---
> >  .../devicetree/bindings/dsp/fsl,dsp.yaml      | 51 ++++++++++++++-----
> >  1 file changed, 39 insertions(+), 12 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
> > index 9af40da5688e..4a39d57b1cc6 100644
> > --- a/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
> > +++ b/Documentation/devicetree/bindings/dsp/fsl,dsp.yaml
> > @@ -30,22 +30,12 @@ properties:
> >      maxItems: 1
> >  
> >    clocks:
> > -    items:
> > -      - description: ipg clock
> > -      - description: ocram clock
> > -      - description: core clock
> > -      - description: debug interface clock
> > -      - description: message unit clock
> >      minItems: 3
> > +    maxItems: 5
> >  
> >    clock-names:
> > -    items:
> > -      - const: ipg
> > -      - const: ocram
> > -      - const: core
> > -      - const: debug
> > -      - const: mu
> >      minItems: 3
> > +    maxItems: 5
> >  
> >    power-domains:
> >      description:
> > @@ -93,6 +83,43 @@ required:
> >    - memory-region
> >  
> >  allOf:
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: fsl,imx8ulp-hifi4
> > +    then:
> > +      properties:
> > +        clocks:
> > +          items:
> > +            - description: ipg clock
> > +            - description: ocram clock
> > +            - description: core clock
> > +            - description: message unit clock
> > +        clock-names:
> > +          items:
> > +            - const: ipg
> > +            - const: ocram
> > +            - const: core
> > +            - const: mu
> > +    else:
> > +      properties:
> > +        clocks:
> > +          items:
> > +            - description: ipg clock
> > +            - description: ocram clock
> > +            - description: core clock
> > +            - description: debug interface clock
> > +            - description: message unit clock
> > +          minItems: 3
> > +        clock-names:
> > +          items:
> > +            - const: ipg
> > +            - const: ocram
> > +            - const: core
> > +            - const: debug
> > +            - const: mu
> > +          minItems: 3
> 
> According to your descript, look like only clk "debug" is difference.
> 
> How about
> 
>   clocks:                                                               
>     items:                                                              
>       - description: ipg clock                                          
>       - description: ocram clock                                        
>       - description: core clock                                         
>       - description: message unit clock                                 
>       - description: debug interface clock
> 
>    clock-names:                                                          
>       items:                                                              
>         - const: ipg                                                      
>         - const: ocram                                                    
>         - const: core
> 	- const: mu                                                     
>         - const: debug                                                    

You can't change the existing order, so this does not work.

Rob