linux-kernel - Re: [PATCH v2 2/3] dt-bindings: iio: adc: Add binding for AD7380 ADCs

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Message-ID: <20231213-harmless-aspect-b7cee2d0173f@spud>
Date:   Wed, 13 Dec 2023 16:11:40 +0000
From:   Conor Dooley <conor@...nel.org>
To:     David Lechner <dlechner@...libre.com>
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/3] dt-bindings: iio: adc: Add binding for AD7380 ADCs

On Wed, Dec 13, 2023 at 04:10:40PM +0000, Conor Dooley wrote:
> On Wed, Dec 13, 2023 at 05:21:19AM -0600, David Lechner wrote:
> > This adds a binding specification for the Analog Devices Inc. AD7380
> > family of ADCs.
> > 
> > Signed-off-by: David Lechner <dlechner@...libre.com>
> > ---
> > 
> > v2 changes:
> > - Added maxItems to reg property
> > - Replaced adi,sdo-mode property with spi-rx-bus-channels
> > - Made spi-rx-bus-channels property optional with default value of 1
> >     (this made the if: check more complex)
> > - Changed example to use gpio for interrupt
> > 
> >  .../devicetree/bindings/iio/adc/adi,ad7380.yaml    | 107 +++++++++++++++++++++
> >  MAINTAINERS                                        |   9 ++
> >  2 files changed, 116 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
> > new file mode 100644
> > index 000000000000..43d58c52f7dd
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7380.yaml
> > @@ -0,0 +1,107 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/iio/adc/adi,ad7380.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Analog Devices Simultaneous Sampling Analog to Digital Converters
> > +
> > +maintainers:
> > +  - Michael Hennerich <Michael.Hennerich@...log.com>
> > +  - Nuno Sá <nuno.sa@...log.com>
> > +
> > +description: |
> > +  * https://www.analog.com/en/products/ad7380.html
> > +  * https://www.analog.com/en/products/ad7381.html
> > +  * https://www.analog.com/en/products/ad7383.html
> > +  * https://www.analog.com/en/products/ad7384.html
> > +
> > +$ref: /schemas/spi/spi-peripheral-props.yaml#
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - adi,ad7380
> > +      - adi,ad7381
> > +      - adi,ad7383
> > +      - adi,ad7384
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  spi-max-frequency:
> > +    maximum: 80000000
> > +  spi-cpol: true
> > +  spi-cpha: true
> > +
> > +  spi-rx-bus-channels:
> 
> This is now being framed as a standard property, so I think it should be
> in spi-peripheral-props, no? Granted, you'd need a rather more
> generalised explanation of the property in that case.
> 
> > +    description:
> > +      In 1-wire mode, the SDOA pin acts as the sole data line and the SDOB/ALERT
> > +      pin acts as the ALERT interrupt signal. In 2-wire mode, data for input A
> > +      is read from SDOA and data for input B is read from SDOB/ALERT (and the
> > +      ALERT interrupt signal is not available).
> > +    enum: [1, 2]
> 
> Jonathan also mentioned specifying that this defaults to 1-wire. I
> didn't see a response or that implemented. Did you miss that comment
> from him?

Ah, I read the patchset backwards, d'oh. I see you did in fact do both
of these things. Apologies!

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