linux-kernel - Re: [PATCH v4 3/4] ASoC: dt-bindings: fsl-sai: allow only one dma-names

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Message-ID: <20240306-pebble-grope-88fdaa95a87c@spud>
Date: Wed, 6 Mar 2024 18:45:13 +0000
From: Conor Dooley <conor@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
	Rob Herring <robh@...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 v4 3/4] ASoC: dt-bindings: fsl-sai: allow only one
 dma-names

On Tue, Mar 05, 2024 at 12:33:04PM -0500, Frank Li wrote:
> Some sai only connect one direction dma (rx/tx) in SOC. For example:
> imx8qxp sai5 only connect tx dma channel. So allow only one "rx" or "tx"
> for dma-names.
> 
> Remove description under dmas because no user use index to get dma channel.
> All user use 'dma-names' to get correct dma channel. dma-names already in
> 'required' list.

Acked-by: Conor Dooley <conor.dooley@...rochip.com>

> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
>  Documentation/devicetree/bindings/sound/fsl,sai.yaml | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/sound/fsl,sai.yaml b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
> index 2456d958adeef..6f551c68d33db 100644
> --- a/Documentation/devicetree/bindings/sound/fsl,sai.yaml
> +++ b/Documentation/devicetree/bindings/sound/fsl,sai.yaml
> @@ -81,15 +81,14 @@ properties:
>  
>    dmas:
>      minItems: 1
> -    items:
> -      - description: DMA controller phandle and request line for RX
> -      - description: DMA controller phandle and request line for TX
> +    maxItems: 2
>  
>    dma-names:
> -    minItems: 1
> -    items:
> -      - const: rx
> -      - const: tx
> +    oneOf:
> +      - items:
> +          - const: rx
> +          - const: tx
> +      - enum: [ rx, tx ]

I'm not entirely sure if this was Rob's suggestion, I got the impression
he was suggesting that in the two items case we'd not care about the
order. But while I think this is different to that suggestion it's also
not wrong.

Thanks,
Conor.

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