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 54 reset-gpios: 55 maxItems: 1 56 57required: 58 - compatible 59 - reg 60 - spi-max-frequency 61 - spi-cpol 62 - refin-supply 63 64patternProperties: 65 "^channel@[0-3]$": 66 type: object 67 additionalProperties: false 68 description: Represents the external channels which are connected to the device. 69 70 properties: 71 reg: 72 description: | 73 The channel number. It can have up to 4 channels numbered from 0 to 3. 74 minimum: 0 75 maximum: 3 76 77 adi,ch-func: 78 $ref: /schemas/types.yaml#/definitions/uint32 79 description: | 80 Channel function. 81 HART functions are not supported on AD74412R. 82 0 - CH_FUNC_HIGH_IMPEDANCE 83 1 - CH_FUNC_VOLTAGE_OUTPUT 84 2 - CH_FUNC_CURRENT_OUTPUT 85 3 - CH_FUNC_VOLTAGE_INPUT 86 4 - CH_FUNC_CURRENT_INPUT_EXT_POWER 87 5 - CH_FUNC_CURRENT_INPUT_LOOP_POWER 88 6 - CH_FUNC_RESISTANCE_INPUT 89 7 - CH_FUNC_DIGITAL_INPUT_LOGIC 90 8 - CH_FUNC_DIGITAL_INPUT_LOOP_POWER 91 9 - CH_FUNC_CURRENT_INPUT_EXT_POWER_HART 92 10 - CH_FUNC_CURRENT_INPUT_LOOP_POWER_HART 93 minimum: 0 94 maximum: 10 95 default: 0 96 97 adi,gpo-comparator: 98 type: boolean 99 description: | 100 Whether to configure GPO as a comparator or not. 101 When not configured as a comparator, the GPO will be treated as an 102 output-only GPIO. 103 104 required: 105 - reg 106 107allOf: 108 - $ref: /schemas/spi/spi-peripheral-props.yaml# 109 110unevaluatedProperties: false 111 112examples: 113 - | 114 #include <dt-bindings/gpio/gpio.h> 115 #include <dt-bindings/interrupt-controller/irq.h> 116 #include <dt-bindings/iio/addac/adi,ad74413r.h> 117 118 spi { 119 #address-cells = <1>; 120 #size-cells = <0>; 121 122 addac@0 { 123 compatible = "adi,ad74413r"; 124 reg = <0>; 125 spi-max-frequency = <1000000>; 126 spi-cpol; 127 128 #address-cells = <1>; 129 #size-cells = <0>; 130 131 interrupt-parent = <&gpio>; 132 interrupts = <26 IRQ_TYPE_EDGE_FALLING>; 133 134 refin-supply = <&ad74413r_refin>; 135 reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>; 136 137 channel@0 { 138 reg = <0>; 139 140 adi,ch-func = <CH_FUNC_VOLTAGE_OUTPUT>; 141 }; 142 143 channel@1 { 144 reg = <1>; 145 146 adi,ch-func = <CH_FUNC_CURRENT_OUTPUT>; 147 }; 148 149 channel@2 { 150 reg = <2>; 151 152 adi,ch-func = <CH_FUNC_DIGITAL_INPUT_LOGIC>; 153 adi,gpo-comparator; 154 }; 155 156 channel@3 { 157 reg = <3>; 158 159 adi,ch-func = <CH_FUNC_CURRENT_INPUT_EXT_POWER>; 160 }; 161 }; 162 }; 163... 164