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