xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/iio/dac/microchip,mcp4725.yaml

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/dac/microchip,mcp4725.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Microchip mcp4725 and mcp4726 DAC

maintainers:
  - Tomas Novotny <tomas@novotny.cz>

properties:
  compatible:
    enum:
      - microchip,mcp4725
      - microchip,mcp4726

  reg:
    maxItems: 1

  vdd-supply:
    description: |
      Provides both power and acts as the reference supply on the mcp4725.
      For the mcp4726 it will be used as the reference voltage if vref-supply
      is not provided.

  vref-supply:
    description:
      Vref pin is used as a voltage reference when this supply is specified.

  microchip,vref-buffered:
    type: boolean
    description: |
      Enable buffering of the external Vref pin. This boolean is not valid
      without the vref-supply. Quoting the datasheet: This is offered in
      cases where the reference voltage does not have the current
      capability not to drop its voltage when connected to the internal
      resistor ladder circuit.

allOf:
  - if:
      properties:
        compatible:
          contains:
            const: microchip,mcp4725
    then:
      properties:
        vref-supply: false
      required:
        - vdd-supply

  - if:
      properties:
        compatible:
          contains:
            const: microchip,mcp4726
    then:
      anyOf:
        - required:
            - vdd-supply
        - required:
            - vref-supply

  - if:
      not:
        required:
          - vref-supply
    then:
      properties:
        microchip,vref-buffered: false

required:
  - compatible
  - reg

additionalProperties: false

examples:
  - |
    i2c {
        #address-cells = <1>;
        #size-cells = <0>;

        mcp4725@60 {
            compatible = "microchip,mcp4725";
            reg = <0x60>;
            vdd-supply = <&vdac_vdd>;
        };
    };
...