196 lines
4.6 KiB
YAML
196 lines
4.6 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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# Copyright 2020 Analog Devices Inc.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/dac/adi,ad5770r.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Analog Devices AD5770R DAC device driver
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maintainers:
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- Alexandru Tachici <alexandru.tachici@analog.com>
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description: |
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Bindings for the Analog Devices AD5770R current DAC device. Datasheet can be
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found here:
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https://www.analog.com/media/en/technical-documentation/data-sheets/AD5770R.pdf
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properties:
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compatible:
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enum:
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- adi,ad5770r
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reg:
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maxItems: 1
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avdd-supply:
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description:
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AVdd voltage supply. Represents two different supplies in the datasheet
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that are in fact the same.
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iovdd-supply:
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description:
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Voltage supply for the chip interface.
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vref-supply:
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description: Specify the voltage of the external reference used.
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Available reference options are 1.25 V or 2.5 V. If no
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external reference declared then the device will use the
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internal reference of 1.25 V.
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adi,external-resistor:
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description: Specify if an external 2.5k ohm resistor is used. If not
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specified the device will use an internal 2.5k ohm resistor.
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The precision resistor is used for reference current generation.
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type: boolean
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reset-gpios:
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description: GPIO spec for the RESET pin. If specified, it will be
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asserted during driver probe.
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maxItems: 1
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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channel@0:
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description: Represents an external channel which are
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connected to the DAC. Channel 0 can act both as a current
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source and sink.
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type: object
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additionalProperties: false
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properties:
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reg:
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description: This represents the channel number.
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const: 0
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adi,range-microamp:
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description: Output range of the channel.
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oneOf:
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- items:
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- const: 0
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- const: 300000
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- items:
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- const: -60000
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- const: 0
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- items:
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- const: -60000
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- const: 300000
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channel@1:
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description: Represents an external channel which are
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connected to the DAC.
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type: object
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additionalProperties: false
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properties:
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reg:
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description: This represents the channel number.
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const: 1
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adi,range-microamp:
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description: Output range of the channel.
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items:
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- const: 0
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- enum: [140000, 250000]
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channel@2:
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description: Represents an external channel which are
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connected to the DAC.
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type: object
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additionalProperties: false
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properties:
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reg:
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description: This represents the channel number.
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const: 2
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adi,range-microamp:
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description: Output range of the channel.
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items:
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- const: 0
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- enum: [55000, 150000]
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patternProperties:
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"^channel@([3-5])$":
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type: object
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additionalProperties: false
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description: Represents the external channels which are connected to the DAC.
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properties:
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reg:
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description: This represents the channel number.
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minimum: 3
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maximum: 5
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adi,range-microamp:
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description: Output range of the channel.
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items:
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- const: 0
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- enum: [45000, 100000]
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required:
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- reg
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- channel@0
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- channel@1
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- channel@2
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- channel@3
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- channel@4
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- channel@5
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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml#
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unevaluatedProperties: false
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examples:
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- |
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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ad5770r@0 {
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compatible = "adi,ad5770r";
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reg = <0>;
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spi-max-frequency = <1000000>;
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vref-supply = <&vref>;
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adi,external-resistor;
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reset-gpios = <&gpio 22 0>;
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#address-cells = <1>;
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#size-cells = <0>;
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channel@0 {
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reg = <0>;
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adi,range-microamp = <0 300000>;
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};
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channel@1 {
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reg = <1>;
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adi,range-microamp = <0 140000>;
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};
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channel@2 {
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reg = <2>;
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adi,range-microamp = <0 55000>;
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};
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channel@3 {
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reg = <3>;
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adi,range-microamp = <0 45000>;
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};
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channel@4 {
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reg = <4>;
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adi,range-microamp = <0 45000>;
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};
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channel@5 {
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reg = <5>;
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adi,range-microamp = <0 45000>;
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};
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};
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};
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...
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