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

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Date:   Fri, 09 Jul 2021 10:28:40 -0400
From:   "Liam Beguin" <liambeguin@...il.com>
To:     "Sa, Nuno" <Nuno.Sa@...log.com>,
        "lars@...afoo.de" <lars@...afoo.de>,
        "Hennerich, Michael" <Michael.Hennerich@...log.com>,
        "jic23@...nel.org" <jic23@...nel.org>,
        "charles-antoine.couret@...ensium.com" 
        <charles-antoine.couret@...ensium.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
Subject: RE: [PATCH v1 4/4] dt-bindings: iio: adc: ad7949: add
 adi,reference-source

On Fri Jul 9, 2021 at 4:15 AM EDT, Sa, Nuno wrote:
>
>
> > -----Original Message-----
> > From: Liam Beguin <liambeguin@...il.com>
> > Sent: Friday, July 9, 2021 1:56 AM
> > To: liambeguin@...il.com; lars@...afoo.de; Hennerich, Michael
> > <Michael.Hennerich@...log.com>; jic23@...nel.org; charles-
> > antoine.couret@...ensium.com
> > Cc: linux-kernel@...r.kernel.org; linux-iio@...r.kernel.org;
> > devicetree@...r.kernel.org; robh+dt@...nel.org
> > Subject: [PATCH v1 4/4] dt-bindings: iio: adc: ad7949: add
> > adi,reference-source
> > 
> > [External]
> > 
> > From: Liam Beguin <lvb@...hos.com>
> > 
> > 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@...hos.com>
> > ---
> >  .../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.
>

I realize I misread your comment on the order of the description. I'll
move it at the top of the binding definition.

Liam

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