linux-kernel - Re: [PATCH v5 1/3] dt-bindings: iio: dac: AD5766 yaml documentation

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Message-ID: <20210111195454.GA2960719@robh.at.kernel.org>
Date:   Mon, 11 Jan 2021 13:54:54 -0600
From:   Rob Herring <robh@...nel.org>
To:     Cristian Pop <cristian.pop@...log.com>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        jic23@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 1/3] dt-bindings: iio: dac: AD5766 yaml documentation

On Fri, Jan 08, 2021 at 08:37:37PM +0200, Cristian Pop wrote:
> This adds device tree bindings for the AD5766 DAC.
> 
> Signed-off-by: Cristian Pop <cristian.pop@...log.com>
> ---
> Changelog v5:                                                              
>         -rename to property to "output-range-voltage"
>  .../bindings/iio/dac/adi,ad5766.yaml          | 64 +++++++++++++++++++
>  1 file changed, 64 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ad5766.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5766.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5766.yaml
> new file mode 100644
> index 000000000000..1deace7c48b2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5766.yaml
> @@ -0,0 +1,64 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2020 Analog Devices Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/dac/adi,ad5766.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices AD5766 DAC device driver
> +
> +maintainers:
> +  - Cristian Pop <cristian.pop@...log.com>
> +
> +description: |
> +  Bindings for the Analog Devices AD5766 current DAC device. Datasheet can be
> +  found here:
> +    https://www.analog.com/media/en/technical-documentation/data-sheets/ad5766-5767.pdf
> +
> +properties:
> +  compatible:
> +    enum:
> +      - adi,ad5766
> +      - adi,ad5767
> +
> +  output-range-volts:

Use a unit defined in property-units.txt (-microvolt).

> +    description: Select converter output range.
> +
> +  reg:
> +    maxItems: 1
> +
> +  spi-max-frequency:
> +    maximum: 1000000
> +
> +  spi-cpol: true
> +
> +  reset-gpios:
> +    description: GPIO spec for the RESET pin. If specified, it will be asserted
> +      during driver probe. As the line is active low, it should be marked
> +      GPIO_ACTIVE_LOW.

'asserted during driver probe' is a Linux implementation detail not 
relevant to the binding.

> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - output-range-volts
> +  - reg
> +  - spi-max-frequency
> +  - spi-cpol
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    spi {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +          
> +          ad5766@0 {
> +              compatible = "adi,ad5766";
> +              output-range-volts = <(-5) 5>;
> +              reg = <0>;
> +              spi-cpol;
> +              spi-max-frequency = <1000000>;
> +              reset-gpios = <&gpio 22 0>;
> +            };
> +      };
> -- 
> 2.17.1
>