dt-bindings: iio: adc: microchip,mcp3201 yaml conversion.

* Microchip Analog to Digital Converter (ADC)

The node for this driver must be a child node of a SPI controller, hence

all mandatory properties described in

        Documentation/devicetree/bindings/spi/spi-bus.txt

must be specified.

Required properties:

	- compatible:  	Must be one of the following, depending on the

			model:

				"mcp3001" (DEPRECATED)

				"mcp3002" (DEPRECATED)

				"mcp3004" (DEPRECATED)

				"mcp3008" (DEPRECATED)

				"mcp3201" (DEPRECATED)

				"mcp3202" (DEPRECATED)

				"mcp3204" (DEPRECATED)

				"mcp3208" (DEPRECATED)

				"mcp3301" (DEPRECATED)

				"microchip,mcp3001"

				"microchip,mcp3002"

				"microchip,mcp3004"

				"microchip,mcp3008"

				"microchip,mcp3201"

				"microchip,mcp3202"

				"microchip,mcp3204"

				"microchip,mcp3208"

				"microchip,mcp3301"

				"microchip,mcp3550-50"

				"microchip,mcp3550-60"

				"microchip,mcp3551"

				"microchip,mcp3553"

			NOTE: The use of the compatibles with no vendor prefix

			is deprecated and only listed because old DT use them.

	- spi-cpha, spi-cpol (boolean):

			Either SPI mode (0,0) or (1,1) must be used, so specify

			none or both of spi-cpha, spi-cpol.  The MCP3550/1/3

			is more efficient in mode (1,1) as only 3 instead of

			4 bytes need to be read from the ADC, but not all SPI

			masters support it.

	- vref-supply:	Phandle to the external reference voltage supply.

Examples:

spi_controller {

	mcp3x0x@0 {

		compatible = "microchip,mcp3002";

		reg = <0>;

		spi-max-frequency = <1000000>;

		vref-supply = <&vref_reg>;

	};

};

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/iio/adc/microchip,mcp3201.yaml#

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

title: Microchip mcp3201 and similar ADCs

maintainers:

  - Oskar Andero <oskar.andero@gmail.com>

description: |

   Family of simple ADCs with an I2C inteface.

properties:

  compatible:

    enum:

      - microchip,mcp3001

      - microchip,mcp3002

      - microchip,mcp3004

      - microchip,mcp3008

      - microchip,mcp3201

      - microchip,mcp3202

      - microchip,mcp3204

      - microchip,mcp3208

      - microchip,mcp3301

      - microchip,mcp3550-50

      - microchip,mcp3550-60

      - microchip,mcp3551

      - microchip,mcp3553

  reg:

    maxItems: 1

  spi-max-frequency: true

  spi-cpha: true

  spi-cpol: true

  vref-supply:

    description: External reference.

  "#io-channel-cells":

    const: 1

dependencies:

  spi-cpol: [ spi-cpha ]

  spi-cpha: [ spi-cpol ]

required:

  - compatible

  - reg

  - vref-supply

additionalProperties: false

examples:

  - |

    spi {

        #address-cells = <1>;

        #size-cells = <0>;

        adc@0 {

            compatible = "microchip,mcp3002";

            reg = <0>;

            vref-supply = <&vref_reg>;

            spi-cpha;

            spi-cpol;

            #io-channel-cells = <1>;

        };

        adc@1 {

            compatible = "microchip,mcp3002";

            reg = <1>;

            vref-supply = <&vref_reg>;

            spi-max-frequency = <1500000>;

        };

    };

...