Re: [PATCH RFC v2 1/3] dt-bindings: iio: adc: Add reference-source property

[David Lechner <dlechner@baylibre.com>]

On 6/22/26 2:30 PM, Kurt Borja wrote:
> Some ADCs have configurable voltage reference sources for each channel.
> 
> Signed-off-by: Kurt Borja <kuurtb@gmail.com>
> ---
>  Documentation/devicetree/bindings/iio/adc/adc.yaml | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml
> index b9bc02b5b07a4c7..fdad6b8276c934c 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adc.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml
> @@ -73,6 +73,19 @@ properties:
>        device design and can interact with other characteristics such as
>        settling time.
>  
> +  reference-source:

Since this is an array, the name should be `reference-sources`.

> +    $ref: /schemas/types.yaml#/definitions/string-array
> +    maxItems: 2
> +    minItems: 1

Maybe minItems here is OK, but I don't think we should put maxItems here.
This way, it stays more flexible for other use cases.

> +    description:
> +      Indicates the voltage reference source or sources for this channel. Some
> +      ADCs usually allow choosing between internal reference sources or a pair
> +      of external pins.
> +
> +      If a single value is provided, it represents a single voltage reference
> +      source. If two values are provided, the first one corresponds to the
> +      positive source and the second to the negative source.
> +
>  anyOf:
>    - oneOf:
>        - required:
>