RE: [PATCH v1 4/4] dt-bindings: iio: adc: ad7949: add adi,reference-source

[Liam Beguin]

Hi Nuno,

On Fri Jul 9, 2021 at 4:15 AM EDT, Sa, Nuno wrote:
>
>
> > -----Original Message-----
> > From: Liam Beguin <liambeguin@xxxxxxxxx>
> > Sent: Friday, July 9, 2021 1:56 AM
> > To: liambeguin@xxxxxxxxx; lars@xxxxxxxxxx; Hennerich, Michael
> > <Michael.Hennerich@xxxxxxxxxx>; jic23@xxxxxxxxxx; charles-
> > antoine.couret@xxxxxxxxxxxxx
> > Cc: linux-kernel@xxxxxxxxxxxxxxx; linux-iio@xxxxxxxxxxxxxxx;
> > devicetree@xxxxxxxxxxxxxxx; robh+dt@xxxxxxxxxx
> > Subject: [PATCH v1 4/4] dt-bindings: iio: adc: ad7949: add
> > adi,reference-source
> > 
> > [External]
> > 
> > From: Liam Beguin <lvb@xxxxxxxxxx>
> > 
> > Add bindings documentation for the adi,reference-source property.
> > This property is required to properly configure the ADC sample request
> > based on which reference source should be used for the calculation.
> > 
> > Signed-off-by: Liam Beguin <lvb@xxxxxxxxxx>
> > ---
> >  .../bindings/iio/adc/adi,ad7949.yaml          | 22 +++++++++++++++++++
> >  1 file changed, 22 insertions(+)
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
> > b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
> > index 9b56bd4d5510..3f4629281cc8 100644
> > --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
> > +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
> > @@ -35,6 +35,28 @@ properties:
> >    "#io-channel-cells":
> >      const: 1
> > 
> > +  adi,reference-select:
> > +    allOf:
> > +      - $ref: /schemas/types.yaml#/definitions/uint32
> > +      - enum: [0, 1, 2, 3, 6, 7]
> > +
> > +    default: 7
> > +    description: |
> > +      Select the reference voltage source to use when converting
> > samples.
> > +      Acceptable values are:
> > +      - 0: Internal reference and temperature sensor enabled.
> > +           Vref=2.5V, buffered output
> > +      - 1: Internal reference and temperature sensor enabled.
> > +           Vref=4.096V, buffered output
> > +      - 2: Use external reference, temperature sensor enabled.
> > +           Internal buffer disabled
> > +      - 3: Use external reference, internal buffer and temperature
> > sensor
> > +           enabled.
> > +      - 6: Use external reference, internal buffer and temperature
> > sensor
> > +           disabled.
> > +      - 7: Use external reference, internal buffer enabled.
> > +           Internal reference and temperature sensor disabled.
>
> I think typically the description comes first. I also don't think you
> need the 'allOf'(not even sure if it will pass the binding check)...
> Just have '$ref' and 'enum' on the same level.
>

Understood, I can reorder the patches so that the bindings come first.

I thought I based that part on the `example-schema.yaml`, but looking at
it again, it seems like you're right and the AllOf isn't required.

I did run the bindings check on this, but I'll fix it.

Thanks,
Liam

> - Nuno Sá
>
> >  required:
> >    - compatible
> >    - reg
> > --
> > 2.30.1.489.g328c10930387