Re: [PATCH v3 5/8] dt-bindings: iio: adc: add ti,ads122c14

[David Lechner <dlechner@baylibre.com>]

Replying to https://sashiko.dev/#/patchset/20260710-iio-adc-ti-ads122c14-v3-0-746d52cbf1d0@baylibre.com?part=5

On 7/10/26 5:50 PM, David Lechner (TI) wrote:
> Add new bindings for ti,ads122c14 and similar devices.
> 
> This is an ADC that is primarily intended for use with temperature
> sensors. There are a few unusual properties because of this. In
> particular, the reference voltage source and current output requirements
> can be different for each measurement, so these are included in the
> channel bindings.
> 
> The REFP/REFN reference voltage is usually just connected to a resistor
> that is being driven by the ADC's current outputs, so there is special
> property for this case rather than requiring a regulator to be defined
> to represent that.
> 

> ti,vref-source is reused from ti,tlv320adcx140.yaml (otherwise might
> have preferred an enum of strings).

This paragraph is leftover from v1 and should be deleted. (If someone
called it out in v2, I missed it.)


> +
> +  interrupts:
> +    minItems: 1
> +    items:
> +      - description: FAULT interrupt (GPIO2 pin)
> +      - description: DRDY interrupt (GPIO3 pin)
> +
> +  interrupt-names:
> +    minItems: 1
> +    maxItems: 2
> +    items:
> +      enum: [fault, drdy]

I know the descriptions are a inconsistent with allowing names to
be in any order. I don't really know a better way to write that
though that allows both

	interrupts = <0>;
	interrupt-names = "fault";

and 

	interrupts = <0>;
	interrupt-names = "drdy";

They are just descriptions, so does it really matter?

> +
> +  gpio-controller: true
> +  '#gpio-cells':
> +    const: 2
> +

No, gpio-conroller should not be required. It is rare to use the GPIOs on
this chip and the pins are shared with other functions.