Commit 06d2ff6f authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

dt-bindings:iio:dac:dpot-dac: yaml conversion. 



Txt to yaml format conversion.  I dropped the example section
describing the measurement ADC, as that isn't strictly part
of this binding.

Uses the new dt-schema/schema/iio/iio-consumer.yaml schema.

Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Cc: Peter Rosin <peda@axentia.se>
Link: https://lore.kernel.org/r/20201031181242.742301-3-jic23@kernel.org
parent dba91f82

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

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Bindings for DAC emulation using a digital potentiometer



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

                  |      |

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



Required properties:

- compatible: Should be "dpot-dac"

- vref-supply: The regulator supplying the voltage divider.

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

- io-channel-names: Should be "dpot".



Example:



	&i2c {

		dpot: mcp4651-503@28 {

			compatible = "microchip,mcp4651-503";

			reg = <0x28>;

			#io-channel-cells = <1>;

		};

	};



	dac {

		compatible = "dpot-dac";

		vref-supply = <&reg_3v3>;

		io-channels = <&dpot 0>;

		io-channel-names = "dpot";

	};

Documentation/devicetree/bindings/iio/dac/dpot-dac.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/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";

    };

...