linux-kernel - Re: [PATCH v1 3/3] dt-bindings: iio: adc: add ADS7924

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Date:   Fri, 23 Dec 2022 14:24:26 -0500
From:   Hugo Villeneuve <hugo@...ovil.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     hvilleneuve@...onoff.com, lars@...afoo.de, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, linux-iio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 3/3] dt-bindings: iio: adc: add ADS7924

On Fri, 23 Dec 2022 14:50:13 +0000
Jonathan Cameron <jic23@...nel.org> wrote:

> On Thu, 22 Dec 2022 15:36:10 -0500
> Hugo Villeneuve <hugo@...ovil.com> wrote:
> 
> > From: Hugo Villeneuve <hvilleneuve@...onoff.com>
> > 
> > Add device tree bindings document for the Texas Instruments ADS7924
> > ADC.
> > 
> > Signed-off-by: Hugo Villeneuve <hvilleneuve@...onoff.com>
> 
> Hi Hugo,
> 
> Whilst you aren't using it yet, the binding should still attempt to be
> a full description of the hardware, so I'd expect the interrupt line to
> be part of it.
> 
> Otherwise, Krzysztof already covered this in detail.

Ok, makes sense. Added.

Hugo.

 > Jonathan
> 
> 
> > ---
> >  .../bindings/iio/adc/ti,ads7924.yaml          | 103 ++++++++++++++++++
> >  1 file changed, 103 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,ads7924.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/iio/adc/ti,ads7924.yaml b/Documentation/devicetree/bindings/iio/adc/ti,ads7924.yaml
> > new file mode 100644
> > index 000000000000..5408ec95e417
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads7924.yaml
> > @@ -0,0 +1,103 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/iio/adc/ti,ads7924.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: TI ADS7924 4 channels 12 bits I2C analog to digital converter
> > +
> > +maintainers:
> > +  - Hugo Villeneuve <hvilleneuve@...onoff.com>
> > +
> > +description: |
> > +  Texas Instruments ADS7924 4 channels 12 bits I2C analog to digital converter
> > +
> > +  Specifications:
> > +    https://www.ti.com/lit/gpn/ads7924
> > +
> > +properties:
> > +  compatible:
> > +    const: ti,ads7924
> > +
> > +  vref-supply:
> > +    description:
> > +      The regulator supply for the ADC reference voltage (AVDD)
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  reset-gpios:
> > +    description:
> > +      GPIO used for controlling the reset pin
> > +    maxItems: 1
> > +
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +  "#io-channel-cells":
> > +    const: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - vref-supply
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +
> > +additionalProperties: false
> > +
> > +patternProperties:
> > +  "^channel@[0-3]+$":
> > +    type: object
> > +    description:
> > +      Child nodes needed for each channel that the platform uses.
> > +
> > +    properties:
> > +      reg:
> > +        description: |
> > +          0: Voltage over AIN0 and GND.
> > +          1: Voltage over AIN1 and GND.
> > +          2: Voltage over AIN2 and GND.
> > +          3: Voltage over AIN3 and GND.
> > +        items:
> > +          - minimum: 0
> > +            maximum: 3
> > +
> > +    required:
> > +      - reg
> > +
> > +examples:
> > +  - |
> > +    i2c {
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        adc@48 {
> > +            compatible = "ti,ads7924";
> > +            reg = <0x48>;
> > +            vref-supply = <&ads7924_reg>;
> > +            reset-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
> > +            #address-cells = <1>;
> > +            #size-cells = <0>;
> > +            channel@0 {
> > +              reg = <0>;
> > +              label = "CH0";
> > +            };
> > +            channel@1 {
> > +              reg = <1>;
> > +              label = "CH1";
> > +            };
> > +            channel@2 {
> > +              reg = <2>;
> > +              label = "CH2";
> > +            };
> > +            channel@3 {
> > +              reg = <3>;
> > +              label = "CH3";
> > +            };
> > +        };
> > +    };
> > +...
> 
> 


-- 
Hugo Villeneuve <hugo@...ovil.com>