Commit 6918ed88 authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

dt-bindings:iio:dac:adi,ad7303 yaml conversion 



Converted to maintain the requirement for Vdd-supply as per original file.
It is possible we could relax this requirement to make it at least one
of Vdd-supply and REF-supply.  We need to establish the scaling of the
output channel and if REF-supply is provided that is used instead of
Vdd-supply, hence I cannot see why a dummy regulator cannot be used for
Vdd-supply if this happens.

For now, let us keep it simple.

Drop adi,use-external-reference from binding example as no such binding
exists.

Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20201031134110.724233-18-jic23@kernel.org
parent 8b74e06b

Documentation/devicetree/bindings/iio/dac/ad7303.txt

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Analog Devices AD7303 DAC device driver



Required properties:

	- compatible: Must be "adi,ad7303"

	- reg: SPI chip select number for the device

	- spi-max-frequency: Max SPI frequency to use (< 30000000)

	- Vdd-supply: Phandle to the Vdd power supply



Optional properties:

	- REF-supply: Phandle to the external reference voltage supply. This should

	  only be set if there is an external reference voltage connected to the REF

	  pin. If the property is not set Vdd/2 is used as the reference voltage.



Example:



		ad7303@4 {

			compatible = "adi,ad7303";

			reg = <4>;

			spi-max-frequency = <10000000>;

			Vdd-supply = <&vdd_supply>;

			adi,use-external-reference;

			REF-supply = <&vref_supply>;

		};

Documentation/devicetree/bindings/iio/dac/adi,ad7303.yaml

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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/iio/dac/adi,ad7303.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Analog Devices AD7303 DAC



maintainers:

  - Lars-Peter Clausen <lars@metafoo.de>



properties:

  compatible:

    const: adi,ad7303



  reg:

    maxItems: 1



  Vdd-supply:

    description:

      Used to calculate output channel scalling if REF-supply not specified.

  REF-supply:

    description:

      If not provided, Vdd/2 is used as the reference voltage.



  spi-max-frequency:

    maximum: 30000000



required:

  - compatible

  - reg

  - Vdd-supply



additionalProperties: false



examples:

  - |

    spi {

        #address-cells = <1>;

        #size-cells = <0>;



        dac@4 {

            compatible = "adi,ad7303";

            reg = <4>;

            spi-max-frequency = <10000000>;

            Vdd-supply = <&vdd_supply>;

            REF-supply = <&vref_supply>;

        };

    };

...