156 lines
3.5 KiB
YAML
156 lines
3.5 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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# Copyright 2019 Analog Devices Inc.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/bindings/iio/adc/adi,ad7124.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Analog Devices AD7124 ADC device driver
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maintainers:
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- Stefan Popa <stefan.popa@analog.com>
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description: |
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Bindings for the Analog Devices AD7124 ADC device. Datasheet can be
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found here:
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https://www.analog.com/media/en/technical-documentation/data-sheets/AD7124-8.pdf
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properties:
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compatible:
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enum:
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- adi,ad7124-4
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- adi,ad7124-8
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reg:
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description: SPI chip select number for the device
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maxItems: 1
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clocks:
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maxItems: 1
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description: phandle to the master clock (mclk)
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clock-names:
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items:
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- const: mclk
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interrupts:
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description: IRQ line for the ADC
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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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refin1-supply:
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description: refin1 supply can be used as reference for conversion.
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maxItems: 1
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refin2-supply:
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description: refin2 supply can be used as reference for conversion.
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maxItems: 1
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avdd-supply:
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description: avdd supply can be used as reference for conversion.
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maxItems: 1
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- interrupts
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patternProperties:
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"^channel@([0-9]|1[0-5])$":
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type: object
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description: |
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Represents the external channels which are connected to the ADC.
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See Documentation/devicetree/bindings/iio/adc/adc.txt.
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properties:
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reg:
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description: |
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The channel number. It can have up to 8 channels on ad7124-4
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and 16 channels on ad7124-8, numbered from 0 to 15.
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items:
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minimum: 0
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maximum: 15
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adi,reference-select:
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description: |
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Select the reference source to use when converting on
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the specific channel. Valid values are:
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0: REFIN1(+)/REFIN1(−).
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1: REFIN2(+)/REFIN2(−).
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3: AVDD
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If this field is left empty, internal reference is selected.
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allOf:
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- $ref: /schemas/types.yaml#/definitions/uint32
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- enum: [0, 1, 3]
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diff-channels:
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description: see Documentation/devicetree/bindings/iio/adc/adc.txt
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items:
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minimum: 0
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maximum: 15
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bipolar:
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description: see Documentation/devicetree/bindings/iio/adc/adc.txt
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type: boolean
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adi,buffered-positive:
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description: Enable buffered mode for positive input.
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type: boolean
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adi,buffered-negative:
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description: Enable buffered mode for negative input.
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type: boolean
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required:
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- reg
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- diff-channels
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examples:
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- |
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adc@0 {
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compatible = "adi,ad7124-4";
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reg = <0>;
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spi-max-frequency = <5000000>;
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interrupts = <25 2>;
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interrupt-parent = <&gpio>;
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refin1-supply = <&adc_vref>;
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clocks = <&ad7124_mclk>;
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clock-names = "mclk";
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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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diff-channels = <0 1>;
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adi,reference-select = <0>;
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adi,buffered-positive;
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};
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channel@1 {
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reg = <1>;
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bipolar;
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diff-channels = <2 3>;
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adi,reference-select = <0>;
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adi,buffered-positive;
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adi,buffered-negative;
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};
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channel@2 {
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reg = <2>;
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diff-channels = <4 5>;
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};
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channel@3 {
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reg = <3>;
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diff-channels = <6 7>;
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};
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};
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