xref: /openbmc/linux/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml (revision 9a7b7594)

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/adi,ad7949.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Analog Devices AD7949/AD7682/AD7689 analog to digital converters

maintainers:
  - Charles-Antoine Couret <charles-antoine.couret@essensium.com>

description: |
  Specifications on the converters can be found at:
    AD7949:
      https://www.analog.com/media/en/technical-documentation/data-sheets/AD7949.pdf
    AD7682/AD7698:
      https://www.analog.com/media/en/technical-documentation/data-sheets/AD7682_7689.pdf

properties:
  compatible:
    enum:
      - adi,ad7682
      - adi,ad7689
      - adi,ad7949

  reg:
    maxItems: 1

  vrefin-supply:
    description:
      Buffered ADC reference voltage supply.

  vref-supply:
    description:
      Unbuffered ADC reference voltage supply.

  adi,internal-ref-microvolt:
    description: |
      Internal reference voltage selection in microvolts.

      If no internal reference is specified, the channel will default to the
      external reference defined by vrefin-supply (or vref-supply).
      vrefin-supply will take precedence over vref-supply if both are defined.

      If no supplies are defined, the reference selection will default to
      4096mV internal reference.

    enum: [2500000, 4096000]
    default: 4096000


  spi-max-frequency: true

  '#io-channel-cells':
    const: 1

  '#address-cells':
    const: 1

  '#size-cells':
    const: 0

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    spi {
        #address-cells = <1>;
        #size-cells = <0>;

        adc@0 {
            #address-cells = <1>;
            #size-cells = <0>;

            compatible = "adi,ad7949";
            reg = <0>;
            vref-supply = <&vdd_supply>;
        };

        adc@1 {
            #address-cells = <1>;
            #size-cells = <0>;

            compatible = "adi,ad7949";
            reg = <1>;
            vrefin-supply = <&vdd_supply>;
        };

        adc@2 {
            #address-cells = <1>;
            #size-cells = <0>;

            compatible = "adi,ad7949";
            reg = <2>;
            adi,internal-ref-microvolt = <4096000>;
        };
    };
...