linux-kernel - Re: [PATCH v3 1/2] dt-bindings: iio: dac: add adi,ad5754.yaml

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Message-ID: <24e8464a-923d-cd0f-c681-fc6ca3a5ad59@linaro.org>
Date:   Mon, 21 Nov 2022 12:20:39 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Ciprian Regus <ciprian.regus@...log.com>, jic23@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] dt-bindings: iio: dac: add adi,ad5754.yaml

On 18/11/2022 18:24, Ciprian Regus wrote:
> Add devicetree bindings documentation for the AD5754 DAC driver.
> 
> Signed-off-by: Ciprian Regus <ciprian.regus@...log.com>
> ---
>  changes in v3:
>   - added additionalProperties: false to patternProperties
>   - dropped status in the example.
>   - added different values for adi,output-range-microvolt in the example.
>     Negative values cannot be set since that will create a dt_bindings_check error.
>  .../bindings/iio/dac/adi,ad5754.yaml          | 181 ++++++++++++++++++
>  1 file changed, 181 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml
> new file mode 100644
> index 000000000000..de0f6fab82b8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5754.yaml
> @@ -0,0 +1,181 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/dac/adi,ad5754.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices AD5754 DAC
> +
> +maintainers:
> +  - Ciprian Regus <ciprian.regus@...log.com>
> +
> +description: |
> +  Bindings for the AD5754 and other chip variants digital-to-analog
> +  converters.
> +
> +  https://www.analog.com/media/en/technical-documentation/data-sheets/AD5724_5734_5754.pdf
> +  https://www.analog.com/media/en/technical-documentation/data-sheets/ad5722_5732_5752.pdf
> +  https://www.analog.com/media/en/technical-documentation/data-sheets/ad5724r_5734r_5754r.pdf
> +  https://www.analog.com/media/en/technical-documentation/data-sheets/AD5722R_5732R_5752R.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,ad5722
> +      - adi,ad5732
> +      - adi,ad5752
> +      - adi,ad5724
> +      - adi,ad5734
> +      - adi,ad5754

Keep the list sorted.

> +      - adi,ad5722r

I would even suggest sorted entirely, so 5722r follows 5722, but I don't
mind some combo-sorting (logical + alphabetical).

> +      - adi,ad5732r
> +      - adi,ad5752r
> +      - adi,ad5724r
> +      - adi,ad5734r
> +      - adi,ad5754r
> +
> +  reg:
> +    maxItems: 1
> +
> +  spi-max-frequency:
> +    maximum: 30000000
> +
> +  spi-cpol: true
> +
> +  vref-supply:
> +    description:
> +      The regulator to use as an external reference. If this is not provided,
> +      the internal reference will be used for chips that have this feature.
> +      The external reference must be 2.5V.
> +
> +  clr-gpios:
> +    description: DAC output clear GPIO (CLR pin). If specified, it will be set
> +      to high during probe, thus allowing the DAC output to be updated.
> +    maxItems: 1
> +
> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 0
> +
> +patternProperties:
> +  "^channel@([0-3])$":

No need for ().

> +    type: object
> +    additionalProperties: false
> +    description: Configurations for the DAC channels
> +
> +    properties:
> +      reg:
> +        description: Channel number
> +        maxItems: 1
> +
> +      adi,output-range-microvolt:
> +        description: |
> +          Voltage range of a channel as <minimum, maximum>.
> +        oneOf:
> +          - items:
> +              - const: 0
> +              - enum: [5000000, 10000000, 10800000]
> +          - items:
> +              - const: -5000000
> +              - const: 5000000
> +          - items:
> +              - const: -10000000
> +              - const: 10000000
> +          - items:
> +              - const: -10800000
> +              - const: 10800000
> +
> +    required:
> +      - reg
> +      - adi,output-range-microvolt
> +
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - adi,ad5722
> +              - adi,ad5732
> +              - adi,ad5752
> +              - adi,ad5722r
> +              - adi,ad5732r
> +              - adi,ad5752r
> +    then:
> +      patternProperties:
> +        "^channel@([0-3])$":

No need for ().

> +          type: object
> +          properties:
> +            reg:
> +              description: Channel number
> +              enum: [0, 1]
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - adi,ad5724
> +              - adi,ad5734
> +              - adi,ad5754
> +              - adi,ad5724r
> +              - adi,ad5734r
> +              - adi,ad5754r
> +    then:
> +      patternProperties:
> +        "^channel@([0-3])$":

No need for ().

> +          type: object
> +          properties:
> +            reg:
> +              description: Channel number
> +              enum: [0, 1, 2, 3]
> +


Best regards,
Krzysztof