Re: [PATCH v2 1/8] dt-bindings: iio: adc: Add reference-sources property

["Kurt Borja" <kuurtb@gmail.com>]

On Thu Jun 25, 2026 at 4:55 PM -05, David Lechner wrote:
> From: Kurt Borja <kuurtb@gmail.com>
>
> Some ADCs have configurable voltage reference sources for each channel.
>
> Signed-off-by: Kurt Borja <kuurtb@gmail.com>
> Signed-off-by: David Lechner (TI) <dlechner@baylibre.com>
> ---
> v2 changes (compared to Kurt's RFC v2):
> * Drop maxItems.
> * Drop 2nd paragraph of description.
> * Make reference-sources plural since it is an array.
> ---
>  Documentation/devicetree/bindings/iio/adc/adc.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml
> index b9bc02b5b07a..12800737d4fb 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adc.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml
> @@ -73,6 +73,14 @@ properties:
>        device design and can interact with other characteristics such as
>        settling time.
>  
> +  reference-sources:
> +    $ref: /schemas/types.yaml#/definitions/string-array
> +    minItems: 1

Is minItems necessary here? Its causing dt_binding_check to fail:

	ti,ads1262.example.dtb: adc@0 (ti,ads1263): channel@0:reference-sources: ['ain2', 'ain3', 'ain2-ain3'] is too long

I don't really know why, but removing it fixes it and allows various
array lengths.

> +    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.
> +
>  anyOf:
>    - oneOf:
>        - required:

-- 
Thanks,
 ~ Kurt