linux-kernel - Re: [PATCH v2] dt-bindings: dma: fsl,imx-dma: Convert to dtschema

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Date: Fri, 31 May 2024 16:43:52 +0530
From: Animesh Agarwal <animeshagarwal28@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Vinod Koul <vkoul@...nel.org>, Rob Herring <robh@...nel.org>, 
	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>, dmaengine@...r.kernel.org, 
	devicetree@...r.kernel.org, imx@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] dt-bindings: dma: fsl,imx-dma: Convert to dtschema

On Fri, May 31, 2024 at 3:49 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On 31/05/2024 11:04, Animesh Agarwal wrote:
> > +  "#dma-cells":
> > +    const: 1
> > +
> > +  dma-channels:
> > +    maximum: 16
>
> maximum or const?

The txt binding says it should always be 16. Datasheet says this
device has 16 channels of DMA services. I thought specifying just the
maximum implies maximum=minimum=16. Sorry for missing the changelog in
this version it was cost in the v1 of this patch.

>
> deprecated: true
>

Shall it not be
"#dma-channels ":
  deprecated: true
?

> > +
> > +  dma-requests:
> > +    description: Number of DMA requests supported.
>
> deprecated: true
>

Shall it not be
"#dma-requests ":
  deprecated: true
?

> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - "#dma-cells"
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    dma-controller@...01000 {
> > +      compatible = "fsl,imx27-dma";
> > +      reg = <0x10001000 0x1000>;
> > +      interrupts = <32 33>;
> > +      #dma-cells = <1>;
> > +      dma-channels = <16>;
>
> and drop it from here

Is this really a deprecated property?