Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml

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System
Linux kernel
Corpus path
Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml
Extension
.yaml
Size
1483 bytes
Lines
65
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

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Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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

title: DAC emulation using a digital potentiometer

maintainers:
  - Peter Rosin <peda@axentia.se>

description: |
  It is assumed that the dpot is used as a voltage divider between the
  current dpot wiper setting and the maximum resistance of the dpot. The
  divided voltage is provided by a vref regulator.

                  .------.
   .-----------.  |      |
   | vref      |--'    .---.
   | regulator |--.    |   |
   '-----------'  |    | d |
                  |    | p |
                  |    | o |  wiper
                  |    | t |<---------+
                  |    |   |
                  |    '---'       dac output voltage
                  |      |
                  '------+------------+

properties:
  compatible:
    const: dpot-dac

  vref-supply:
    description: Regulator supplying the voltage divider.

  io-channels:
    maxItems: 1
    description: |
      Channel node of the dpot to be used for the voltage division.

  io-channel-names:
    const: dpot

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

required:
  - compatible
  - vref-supply
  - io-channels
  - io-channel-names

additionalProperties: false

examples:
  - |
    dac {
        compatible = "dpot-dac";
        vref-supply = <&reg_3v3>;
        io-channels = <&dpot 0>;
        io-channel-names = "dpot";
    };
...

Annotation

Implementation Notes