164 lines
3.9 KiB
YAML
164 lines
3.9 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/addac/adi,ad74413r.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Analog Devices AD74412R/AD74413R device
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maintainers:
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- Cosmin Tanislav <cosmin.tanislav@analog.com>
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description: |
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The AD74412R and AD74413R are quad-channel software configurable input/output
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solutions for building and process control applications. They contain
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functionality for analog output, analog input, digital input, resistance
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temperature detector, and thermocouple measurements integrated
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into a single chip solution with an SPI interface.
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The devices feature a 16-bit ADC and four configurable 13-bit DACs to provide
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four configurable input/output channels and a suite of diagnostic functions.
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The AD74413R differentiates itself from the AD74412R by being HART-compatible.
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https://www.analog.com/en/products/ad74412r.html
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https://www.analog.com/en/products/ad74413r.html
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properties:
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compatible:
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enum:
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- adi,ad74412r
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- adi,ad74413r
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reg:
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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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spi-max-frequency:
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maximum: 1000000
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spi-cpol: true
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interrupts:
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maxItems: 1
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refin-supply: true
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shunt-resistor-micro-ohms:
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description:
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Shunt (sense) resistor value in micro-Ohms.
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default: 100000000
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reset-gpios:
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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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- spi-max-frequency
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- spi-cpol
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- refin-supply
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patternProperties:
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"^channel@[0-3]$":
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type: object
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additionalProperties: false
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description: Represents the external channels which are connected to the device.
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properties:
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reg:
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description: |
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The channel number. It can have up to 4 channels numbered from 0 to 3.
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minimum: 0
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maximum: 3
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adi,ch-func:
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$ref: /schemas/types.yaml#/definitions/uint32
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description: |
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Channel function.
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HART functions are not supported on AD74412R.
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0 - CH_FUNC_HIGH_IMPEDANCE
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1 - CH_FUNC_VOLTAGE_OUTPUT
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2 - CH_FUNC_CURRENT_OUTPUT
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3 - CH_FUNC_VOLTAGE_INPUT
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4 - CH_FUNC_CURRENT_INPUT_EXT_POWER
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5 - CH_FUNC_CURRENT_INPUT_LOOP_POWER
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6 - CH_FUNC_RESISTANCE_INPUT
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7 - CH_FUNC_DIGITAL_INPUT_LOGIC
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8 - CH_FUNC_DIGITAL_INPUT_LOOP_POWER
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9 - CH_FUNC_CURRENT_INPUT_EXT_POWER_HART
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10 - CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART
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minimum: 0
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maximum: 10
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default: 0
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adi,gpo-comparator:
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type: boolean
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description: |
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Whether to configure GPO as a comparator or not.
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When not configured as a comparator, the GPO will be treated as an
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output-only GPIO.
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required:
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- reg
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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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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/iio/addac/adi,ad74413r.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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addac@0 {
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compatible = "adi,ad74413r";
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reg = <0>;
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spi-max-frequency = <1000000>;
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spi-cpol;
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#address-cells = <1>;
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#size-cells = <0>;
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interrupt-parent = <&gpio>;
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interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
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refin-supply = <&ad74413r_refin>;
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reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
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channel@0 {
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reg = <0>;
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adi,ch-func = <CH_FUNC_VOLTAGE_OUTPUT>;
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};
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channel@1 {
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reg = <1>;
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adi,ch-func = <CH_FUNC_CURRENT_OUTPUT>;
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};
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channel@2 {
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reg = <2>;
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adi,ch-func = <CH_FUNC_DIGITAL_INPUT_LOGIC>;
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adi,gpo-comparator;
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};
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channel@3 {
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reg = <3>;
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adi,ch-func = <CH_FUNC_CURRENT_INPUT_EXT_POWER>;
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};
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};
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};
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...
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