0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/iio/addac/adi,ad74413r.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Analog Devices AD74412R/AD74413R device
0008
0009 maintainers:
0010 - Cosmin Tanislav <cosmin.tanislav@analog.com>
0011
0012 description: |
0013 The AD74412R and AD74413R are quad-channel software configurable input/output
0014 solutions for building and process control applications. They contain
0015 functionality for analog output, analog input, digital input, resistance
0016 temperature detector, and thermocouple measurements integrated
0017 into a single chip solution with an SPI interface.
0018 The devices feature a 16-bit ADC and four configurable 13-bit DACs to provide
0019 four configurable input/output channels and a suite of diagnostic functions.
0020 The AD74413R differentiates itself from the AD74412R by being HART-compatible.
0021 https://www.analog.com/en/products/ad74412r.html
0022 https://www.analog.com/en/products/ad74413r.html
0023
0024 properties:
0025 compatible:
0026 enum:
0027 - adi,ad74412r
0028 - adi,ad74413r
0029
0030 reg:
0031 maxItems: 1
0032
0033 '#address-cells':
0034 const: 1
0035
0036 '#size-cells':
0037 const: 0
0038
0039 spi-max-frequency:
0040 maximum: 1000000
0041
0042 spi-cpol: true
0043
0044 interrupts:
0045 maxItems: 1
0046
0047 refin-supply: true
0048
0049 shunt-resistor-micro-ohms:
0050 description:
0051 Shunt (sense) resistor value in micro-Ohms.
0052 default: 100000000
0053
0054 required:
0055 - compatible
0056 - reg
0057 - spi-max-frequency
0058 - spi-cpol
0059 - refin-supply
0060
0061 additionalProperties: false
0062
0063 patternProperties:
0064 "^channel@[0-3]$":
0065 type: object
0066 description: Represents the external channels which are connected to the device.
0067
0068 properties:
0069 reg:
0070 description: |
0071 The channel number. It can have up to 4 channels numbered from 0 to 3.
0072 minimum: 0
0073 maximum: 3
0074
0075 adi,ch-func:
0076 $ref: /schemas/types.yaml#/definitions/uint32
0077 description: |
0078 Channel function.
0079 HART functions are not supported on AD74412R.
0080 0 - CH_FUNC_HIGH_IMPEDANCE
0081 1 - CH_FUNC_VOLTAGE_OUTPUT
0082 2 - CH_FUNC_CURRENT_OUTPUT
0083 3 - CH_FUNC_VOLTAGE_INPUT
0084 4 - CH_FUNC_CURRENT_INPUT_EXT_POWER
0085 5 - CH_FUNC_CURRENT_INPUT_LOOP_POWER
0086 6 - CH_FUNC_RESISTANCE_INPUT
0087 7 - CH_FUNC_DIGITAL_INPUT_LOGIC
0088 8 - CH_FUNC_DIGITAL_INPUT_LOOP_POWER
0089 9 - CH_FUNC_CURRENT_INPUT_EXT_POWER_HART
0090 10 - CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART
0091 minimum: 0
0092 maximum: 10
0093 default: 0
0094
0095 adi,gpo-comparator:
0096 type: boolean
0097 description: |
0098 Whether to configure GPO as a comparator or not.
0099 When not configured as a comparator, the GPO will be treated as an
0100 output-only GPIO.
0101
0102 required:
0103 - reg
0104
0105 examples:
0106 - |
0107 #include <dt-bindings/gpio/gpio.h>
0108 #include <dt-bindings/interrupt-controller/irq.h>
0109 #include <dt-bindings/iio/addac/adi,ad74413r.h>
0110
0111 spi {
0112 #address-cells = <1>;
0113 #size-cells = <0>;
0114
0115 cs-gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
0116 status = "okay";
0117
0118 ad74413r@0 {
0119 compatible = "adi,ad74413r";
0120 reg = <0>;
0121 spi-max-frequency = <1000000>;
0122 spi-cpol;
0123
0124 #address-cells = <1>;
0125 #size-cells = <0>;
0126
0127 interrupt-parent = <&gpio>;
0128 interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
0129
0130 refin-supply = <&ad74413r_refin>;
0131
0132 channel@0 {
0133 reg = <0>;
0134
0135 adi,ch-func = <CH_FUNC_VOLTAGE_OUTPUT>;
0136 };
0137
0138 channel@1 {
0139 reg = <1>;
0140
0141 adi,ch-func = <CH_FUNC_CURRENT_OUTPUT>;
0142 };
0143
0144 channel@2 {
0145 reg = <2>;
0146
0147 adi,ch-func = <CH_FUNC_DIGITAL_INPUT_LOGIC>;
0148 adi,gpo-comparator;
0149 };
0150
0151 channel@3 {
0152 reg = <3>;
0153
0154 adi,ch-func = <CH_FUNC_CURRENT_INPUT_EXT_POWER>;
0155 };
0156 };
0157 };
0158 ...
