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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/iio/dac/microchip,mcp4821.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/microchip,mcp4821.yaml#

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

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title: Microchip MCP4821 and similar DACs

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description: |

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  Supports MCP48x1 (single channel) and MCP48x2 (dual channel) series of DACs.

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  Device supports simplex communication over SPI in Mode 0 and Mode 3.

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  +---------+--------------+-------------+

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  | Device  |  Resolution  |   Channels  |

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  |---------|--------------|-------------|

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  | MCP4801 |     8-bit    |      1      |

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  | MCP4802 |     8-bit    |      2      |

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  | MCP4811 |    10-bit    |      1      |

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  | MCP4812 |    10-bit    |      2      |

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  | MCP4821 |    12-bit    |      1      |

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  | MCP4822 |    12-bit    |      2      |

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  +---------+--------------+-------------+

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  Datasheet:

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    MCP48x1: https://ww1.microchip.com/downloads/en/DeviceDoc/22244B.pdf

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    MCP48x2: https://ww1.microchip.com/downloads/en/DeviceDoc/20002249B.pdf

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maintainers:

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  - Anshul Dalal <anshulusr@gmail.com>

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allOf:

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  - $ref: /schemas/spi/spi-peripheral-props.yaml#

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properties:

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  compatible:

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    enum:

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      - microchip,mcp4801

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      - microchip,mcp4802

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      - microchip,mcp4811

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      - microchip,mcp4812

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      - microchip,mcp4821

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      - microchip,mcp4822

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  reg:

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    maxItems: 1

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  vdd-supply: true

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  ldac-gpios:

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    description: |

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      Active Low LDAC (Latch DAC Input) pin used to update the DAC output.

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    maxItems: 1

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  powerdown-gpios:

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    description: |

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      Active Low SHDN pin used to enter the shutdown mode.

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    maxItems: 1

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  spi-cpha: true

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  spi-cpol: true

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required:

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  - compatible

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  - reg

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  - vdd-supply

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unevaluatedProperties: false

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examples:

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  - |

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    #include <dt-bindings/gpio/gpio.h>

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    spi {

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        #address-cells = <1>;

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        #size-cells = <0>;

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        dac@0 {

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            compatible = "microchip,mcp4821";

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            reg = <0>;

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            vdd-supply = <&vdd_regulator>;

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            ldac-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;

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            powerdown-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>;

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            spi-cpha;

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            spi-cpol;

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        };

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    };

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