1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/iio/addac/adi,ad74413r.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Analog Devices AD74412R/AD74413R device 8 9maintainers: 10 - Cosmin Tanislav <cosmin.tanislav@analog.com> 11 12description: | 13 The AD74412R and AD74413R are quad-channel software configurable input/output 14 solutions for building and process control applications. They contain 15 functionality for analog output, analog input, digital input, resistance 16 temperature detector, and thermocouple measurements integrated 17 into a single chip solution with an SPI interface. 18 The devices feature a 16-bit ADC and four configurable 13-bit DACs to provide 19 four configurable input/output channels and a suite of diagnostic functions. 20 The AD74413R differentiates itself from the AD74412R by being HART-compatible. 21 https://www.analog.com/en/products/ad74412r.html 22 https://www.analog.com/en/products/ad74413r.html 23 24properties: 25 compatible: 26 enum: 27 - adi,ad74412r 28 - adi,ad74413r 29 30 reg: 31 maxItems: 1 32 33 '#address-cells': 34 const: 1 35 36 '#size-cells': 37 const: 0 38 39 spi-max-frequency: 40 maximum: 1000000 41 42 spi-cpol: true 43 44 interrupts: 45 maxItems: 1 46 47 refin-supply: true 48 49 shunt-resistor-micro-ohms: 50 description: 51 Shunt (sense) resistor value in micro-Ohms. 52 default: 100000000 53 54required: 55 - compatible 56 - reg 57 - spi-max-frequency 58 - spi-cpol 59 - refin-supply 60 61additionalProperties: false 62 63patternProperties: 64 "^channel@[0-3]$": 65 type: object 66 description: Represents the external channels which are connected to the device. 67 68 properties: 69 reg: 70 description: | 71 The channel number. It can have up to 4 channels numbered from 0 to 3. 72 minimum: 0 73 maximum: 3 74 75 adi,ch-func: 76 $ref: /schemas/types.yaml#/definitions/uint32 77 description: | 78 Channel function. 79 HART functions are not supported on AD74412R. 80 0 - CH_FUNC_HIGH_IMPEDANCE 81 1 - CH_FUNC_VOLTAGE_OUTPUT 82 2 - CH_FUNC_CURRENT_OUTPUT 83 3 - CH_FUNC_VOLTAGE_INPUT 84 4 - CH_FUNC_CURRENT_INPUT_EXT_POWER 85 5 - CH_FUNC_CURRENT_INPUT_LOOP_POWER 86 6 - CH_FUNC_RESISTANCE_INPUT 87 7 - CH_FUNC_DIGITAL_INPUT_LOGIC 88 8 - CH_FUNC_DIGITAL_INPUT_LOOP_POWER 89 9 - CH_FUNC_CURRENT_INPUT_EXT_POWER_HART 90 10 - CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART 91 minimum: 0 92 maximum: 10 93 default: 0 94 95 adi,gpo-comparator: 96 type: boolean 97 description: | 98 Whether to configure GPO as a comparator or not. 99 When not configured as a comparator, the GPO will be treated as an 100 output-only GPIO. 101 102 required: 103 - reg 104 105examples: 106 - | 107 #include <dt-bindings/gpio/gpio.h> 108 #include <dt-bindings/interrupt-controller/irq.h> 109 #include <dt-bindings/iio/addac/adi,ad74413r.h> 110 111 spi { 112 #address-cells = <1>; 113 #size-cells = <0>; 114 115 cs-gpios = <&gpio 17 GPIO_ACTIVE_LOW>; 116 status = "okay"; 117 118 ad74413r@0 { 119 compatible = "adi,ad74413r"; 120 reg = <0>; 121 spi-max-frequency = <1000000>; 122 spi-cpol; 123 124 #address-cells = <1>; 125 #size-cells = <0>; 126 127 interrupt-parent = <&gpio>; 128 interrupts = <26 IRQ_TYPE_EDGE_FALLING>; 129 130 refin-supply = <&ad74413r_refin>; 131 132 channel@0 { 133 reg = <0>; 134 135 adi,ch-func = <CH_FUNC_VOLTAGE_OUTPUT>; 136 }; 137 138 channel@1 { 139 reg = <1>; 140 141 adi,ch-func = <CH_FUNC_CURRENT_OUTPUT>; 142 }; 143 144 channel@2 { 145 reg = <2>; 146 147 adi,ch-func = <CH_FUNC_DIGITAL_INPUT_LOGIC>; 148 adi,gpo-comparator; 149 }; 150 151 channel@3 { 152 reg = <3>; 153 154 adi,ch-func = <CH_FUNC_CURRENT_INPUT_EXT_POWER>; 155 }; 156 }; 157 }; 158... 159