linux-kernel - Re: [PATCH v3 3/4] ASoC: dt-bindings: fsl-sai: allow only one dma-names

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Date: Mon, 4 Mar 2024 08:58:59 -0600
From: Rob Herring <robh@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.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>,
	Shengjiu Wang <shengjiu.wang@....com>, linux-sound@...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 v3 3/4] ASoC: dt-bindings: fsl-sai: allow only one
 dma-names

On Wed, Feb 28, 2024 at 02:14:15PM -0500, Frank Li wrote:
> Some sai only connect one direction. So allow only "rx" or "tx" for
> dma-names.
> 
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  Documentation/devicetree/bindings/sound/fsl,sai.yaml | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/fsl,sai.yaml b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
> index 2456d958adeef..0302752d58a2b 100644
> --- a/Documentation/devicetree/bindings/sound/fsl,sai.yaml
> +++ b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
> @@ -86,10 +86,14 @@ properties:
>        - description: DMA controller phandle and request line for TX
>  
>    dma-names:
> -    minItems: 1
> -    items:
> -      - const: rx

Just this change is enough:

         - enum: [ rx, tx ]

(We enforce unique items elsewhere already)

> -      - const: tx
> +    oneOf:
> +      - items:
> +          - const: rx
> +          - const: tx
> +      - items:
> +          - enum:
> +              - rx
> +              - tx