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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/addac/adi,ad74413r.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Analog Devices AD74412R/AD74413R device
maintainers:
- Cosmin Tanislav <cosmin.tanislav@analog.com>
description: |
The AD74412R and AD74413R are quad-channel software configurable input/output
solutions for building and process control applications. They contain
functionality for analog output, analog input, digital input, resistance
temperature detector, and thermocouple measurements integrated
into a single chip solution with an SPI interface.
The devices feature a 16-bit ADC and four configurable 13-bit DACs to provide
four configurable input/output channels and a suite of diagnostic functions.
The AD74413R differentiates itself from the AD74412R by being HART-compatible.
https://www.analog.com/en/products/ad74412r.html
https://www.analog.com/en/products/ad74413r.html
properties:
compatible:
enum:
- adi,ad74412r
- adi,ad74413r
reg:
maxItems: 1
'#address-cells':
const: 1
'#size-cells':
const: 0
spi-max-frequency:
maximum: 1000000
spi-cpol: true
interrupts:
maxItems: 1
refin-supply: true
shunt-resistor-micro-ohms:
description:
Shunt (sense) resistor value in micro-Ohms.
default: 100000000
reset-gpios:
maxItems: 1
required:
- compatible
- reg
- spi-max-frequency
- spi-cpol
- refin-supply
patternProperties:
"^channel@[0-3]$":
type: object
additionalProperties: false
description: Represents the external channels which are connected to the device.
properties:
reg:
description: |
The channel number. It can have up to 4 channels numbered from 0 to 3.
minimum: 0
maximum: 3
adi,ch-func:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Channel function.
HART functions are not supported on AD74412R.
0 - CH_FUNC_HIGH_IMPEDANCE
1 - CH_FUNC_VOLTAGE_OUTPUT
2 - CH_FUNC_CURRENT_OUTPUT
3 - CH_FUNC_VOLTAGE_INPUT
4 - CH_FUNC_CURRENT_INPUT_EXT_POWER
5 - CH_FUNC_CURRENT_INPUT_LOOP_POWER
6 - CH_FUNC_RESISTANCE_INPUT
7 - CH_FUNC_DIGITAL_INPUT_LOGIC
8 - CH_FUNC_DIGITAL_INPUT_LOOP_POWER
9 - CH_FUNC_CURRENT_INPUT_EXT_POWER_HART
10 - CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART
minimum: 0
maximum: 10
default: 0
adi,gpo-comparator:
type: boolean
description: |
Whether to configure GPO as a comparator or not.
When not configured as a comparator, the GPO will be treated as an
output-only GPIO.
drive-strength-microamp:
description: |
For channels configured as digital input, this configures the sink
current.
minimum: 0
maximum: 1800
default: 0
multipleOf: 120
required:
- reg
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/iio/addac/adi,ad74413r.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
addac@0 {
compatible = "adi,ad74413r";
reg = <0>;
spi-max-frequency = <1000000>;
spi-cpol;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <&gpio>;
interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
refin-supply = <&ad74413r_refin>;
reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
channel@0 {
reg = <0>;
adi,ch-func = <CH_FUNC_VOLTAGE_OUTPUT>;
};
channel@1 {
reg = <1>;
adi,ch-func = <CH_FUNC_CURRENT_OUTPUT>;
};
channel@2 {
reg = <2>;
adi,ch-func = <CH_FUNC_DIGITAL_INPUT_LOGIC>;
adi,gpo-comparator;
};
channel@3 {
reg = <3>;
adi,ch-func = <CH_FUNC_CURRENT_INPUT_EXT_POWER>;
};
};
};
...
|
