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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/iio/dac/dpot-dac.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/iio/dac/dpot-dac.yaml#

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

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title: DAC emulation using a digital potentiometer

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maintainers:

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  - Peter Rosin <peda@axentia.se>

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description: |

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  It is assumed that the dpot is used as a voltage divider between the

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  current dpot wiper setting and the maximum resistance of the dpot. The

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  divided voltage is provided by a vref regulator.

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                  .------.

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   .-----------.  |      |

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   | vref      |--'    .---.

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   | regulator |--.    |   |

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   '-----------'  |    | d |

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                  |    | p |

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                  |    | o |  wiper

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                  |    | t |<---------+

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                  |    |   |

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                  |    '---'       dac output voltage

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                  |      |

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                  '------+------------+

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properties:

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  compatible:

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    const: dpot-dac

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  vref-supply:

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    description: Regulator supplying the voltage divider.

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  io-channels:

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    maxItems: 1

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    description: |

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      Channel node of the dpot to be used for the voltage division.

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  io-channel-names:

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    const: dpot

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  "#io-channel-cells":

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    const: 1

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required:

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  - compatible

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  - vref-supply

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  - io-channels

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  - io-channel-names

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additionalProperties: false

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examples:

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  - |

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    dac {

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        compatible = "dpot-dac";

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        vref-supply = <&reg_3v3>;

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        io-channels = <&dpot 0>;

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        io-channel-names = "dpot";

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    };

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...

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