linux-kernel - Re: [PATCH v2 2/2] dt-bindings: dma: fsl-edma: allow 'power-domains' property

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Date: Sat, 2 Mar 2024 10:42:14 -0500
From: Frank Li <Frank.li@....com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: conor+dt@...nel.org, devicetree@...r.kernel.org,
	dmaengine@...r.kernel.org, imx@...ts.linux.dev,
	krzysztof.kozlowski+dt@...aro.org, linux-kernel@...r.kernel.org,
	peng.fan@....com, robh@...nel.org, vkoul@...nel.org
Subject: Re: [PATCH v2 2/2] dt-bindings: dma: fsl-edma: allow 'power-domains'
 property

On Sat, Mar 02, 2024 at 02:59:39PM +0100, Krzysztof Kozlowski wrote:
> On 01/03/2024 22:45, Frank Li wrote:
> > Allow 'power-domains' property because i.MX8DXL i.MX8QM and i.MX8QXP need
> > it.
> > 
> > Fixed below DTB_CHECK warning:
> >   dma-controller@...f0000: Unevaluated properties are not allowed ('power-domains' was unexpected)
> > 
> > Signed-off-by: Frank Li <Frank.Li@....com>
> > ---
> > 
> > Notes:
> >     Change from v1 to v2
> >     - using maxitem: 64. Each channel have one power domain. Max 64 dmachannel.
> >     - add power-domains to 'required' when compatible string is fsl,imx8qm-adma
> >     or fsl,imx8qm-edma
> > 
> >  .../devicetree/bindings/dma/fsl,edma.yaml         | 15 +++++++++++++++
> >  1 file changed, 15 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/dma/fsl,edma.yaml b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
> > index cf0aa8e6b9ec3..76c1716b8b95c 100644
> > --- a/Documentation/devicetree/bindings/dma/fsl,edma.yaml
> > +++ b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
> > @@ -59,6 +59,10 @@ properties:
> >      minItems: 1
> >      maxItems: 2
> >  
> > +  power-domains:
> > +    minItems: 1
> > +    maxItems: 64
> 
> Hm, this is odd. Blocks do not belong to almost infinite number of power
> domains.

Sorry, what's your means? 'power-domains' belong to 'properties'. 
'maxItems' belong to 'power-domains'.It is similar with 'clocks'. what's
wrong? 

Frank

> 
> Best regards,
> Krzysztof
>