linux-kernel - Re: [PATCH v2 2/2] dt-bindings: iio: adc: add Texas Instruments ADS7924

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Message-Id: <20230111191152.fd5e46921b45f966bc5b5ffa@hugovil.com>
Date:   Wed, 11 Jan 2023 19:11:52 -0500
From:   Hugo Villeneuve <hugo@...ovil.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     hvilleneuve@...onoff.com, jic23@...nel.org, 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 v2 2/2] dt-bindings: iio: adc: add Texas Instruments
 ADS7924

On Wed, 11 Jan 2023 10:23:20 +0100
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:

> On 10/01/2023 17:01, Hugo Villeneuve 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>
> 
> Please test the bindings before sending. It's better to use tools for
> review than humans... we are all quite busy.

Hi,
will do from now on.

> > ---
> >  .../bindings/iio/adc/ti,ads7924.yaml          | 104 ++++++++++++++++++
> >  1 file changed, 104 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..a9d3e8778d11
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/iio/adc/ti,ads7924.yaml
> > @@ -0,0 +1,104 @@
> > +# 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
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  vref-supply:
> > +    description:
> > +      The regulator supply for the ADC reference voltage (AVDD)
> > +
> > +  reset-gpios:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +  "#io-channel-cells":
> > +    const: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - vref-supply
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +
> > +patternProperties:
> 
> Put it before "required:" block.

Done.

> 
> > +  "^channel@[0-3]+$":
> > +    $ref: "adc.yaml"
> 
> Drop quotes.

Done.

> 
> > +    type: object
> > +    description: |
> > +      Represents the external channels which are connected to the ADC.
> > +
> > +    properties:
> > +      reg:
> > +        description: |
> > +          The channel number. It can have up to 4 channels numbered from 0 to 3.
> > +        items:
> > +          - minimum: 0
> > +            maximum: 3
> 
> Test your bindings, so you will see error here of missing label: true.

Added label.

> 
> > +
> > +    required:
> > +      - reg
> > +
> > +    additionalProperties: false
> > +
> 
> Missing additionalProperties: false.

Added.

> 
> > +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>;
> > +            interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
> > +            interrupt-parent = <&gpio>;
> > +            #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";
> > +            };
> > +        };
> > +    };
> > +...
> 
> Best regards,
> Krzysztof


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