Re: [PATCH 7/9] dt-bindings: iio: adc: renesas,r9a09g077-adc: document DMA support

[Conor Dooley <conor@kernel.org>]

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On Fri, Aug 28, 2026 at 05:59:40PM +0300, Cosmin Tanislav wrote:
> The ADC can transfer conversion results to memory over DMA.
> 
> Allow up to three DMA specifiers, as the ADC conversion DMA request can
> be routed to any of the SoC's three DMA controllers.
> 
> Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
> ---
>  .../bindings/iio/adc/renesas,r9a09g077-adc.yaml      | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml b/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml
> index dc0206b28231..4b5934ac296b 100644
> --- a/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml
> @@ -57,6 +57,18 @@ properties:
>        - const: adclk
>        - const: pclk
>  
> +  dmas:
> +    minItems: 1
> +    maxItems: 3
> +    description:
> +      Must contain a list of references to DMA RX specifiers.
> +
> +  dma-names:
> +    minItems: 1
> +    maxItems: 3
> +    items:
> +      const: rx

How does this make any sense?

If the device can make use of three DMA controllers at once, you need 3
names. If it cannot, then just limit this to 1.

pw-bot: changes-requested

Thanks,
Conor.

> +
>    power-domains:
>      maxItems: 1
>  
> -- 
> 2.55.0
> 

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