1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/iio/dac/adi,ad5755.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Analog Devices AD5755 Multi-Channel DAC 8 9maintainers: 10 - Sean Nyekjaer <sean.nyekjaer@prevas.dk> 11 12properties: 13 compatible: 14 enum: 15 - adi,ad5755 16 - adi,ad5755-1 17 - adi,ad5757 18 - adi,ad5735 19 - adi,ad5737 20 21 reg: 22 maxItems: 1 23 24 spi-cpha: 25 description: Either this or spi-cpol but not both. 26 spi-cpol: true 27 28 spi-max-frequency: true 29 30 adi,ext-dc-dc-compenstation-resistor: 31 $ref: /schemas/types.yaml#/definitions/flag 32 description: 33 Set if the hardware have an external resistor and thereby bypasses 34 the internal compensation resistor. 35 36 adi,dc-dc-phase: 37 $ref: /schemas/types.yaml#/definitions/uint32 38 enum: [0, 1, 2, 3] 39 description: | 40 Valid values for DC DC Phase control is: 41 0: All dc-to-dc converters clock on the same edge. 42 1: Channel A and Channel B clock on the same edge, 43 Channel C and Channel D clock on opposite edges. 44 2: Channel A and Channel C clock on the same edge, 45 Channel B and Channel D clock on opposite edges. 46 3: Channel A, Channel B, Channel C, and Channel D 47 clock 90 degrees out of phase from each other. 48 49 adi,dc-dc-freq-hz: 50 enum: [250000, 410000, 650000] 51 52 adi,dc-dc-max-microvolt: 53 description: 54 Maximum allowed Vboost voltage supplied by the dc-to-dc converter. 55 enum: [23000000, 24500000, 27000000, 29500000] 56 57 "#address-cells": 58 const: 1 59 60 "#size-cells": 61 const: 0 62 63 "#io-channel-cells": 64 const: 1 65 66required: 67 - compatible 68 - reg 69 70additionalProperties: false 71 72patternProperties: 73 "^channel@[0-7]$": 74 type: object 75 description: Child node to describe a channel 76 properties: 77 reg: 78 maxItems: 1 79 80 adi,mode: 81 $ref: /schemas/types.yaml#/definitions/uint32 82 minimum: 0 83 maximum: 6 84 description: | 85 Valid values for DAC modes is: 86 0: 0 V to 5 V voltage range. 87 1: 0 V to 10 V voltage range. 88 2: Plus minus 5 V voltage range. 89 3: Plus minus 10 V voltage range. 90 4: 4 mA to 20 mA current range. 91 5: 0 mA to 20 mA current range. 92 6: 0 mA to 24 mA current range. 93 94 adi,ext-current-sense-resistor: 95 $ref: /schemas/types.yaml#/definitions/flag 96 description: 97 Set if the hardware has an external current sense resistor 98 99 adi,enable-voltage-overrange: 100 $ref: /schemas/types.yaml#/definitions/flag 101 description: Enable voltage overrange 102 103 adi,slew: 104 $ref: /schemas/types.yaml#/definitions/uint32-array 105 description: | 106 Array of slewrate settings should contain 3 fields: 107 1: Should be either 0 or 1 in order to enable or disable slewrate. 108 2: Slew rate update frequency 109 3: Slew step size 110 items: 111 - enum: [0, 1] 112 - enum: [64000, 32000, 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 64, 32, 16, 8, 4, 0] 113 - enum: [1, 2, 4, 16, 32, 64, 128, 256] 114 115 required: 116 - reg 117 118 additionalProperties: false 119 120oneOf: 121 - required: 122 - spi-cpha 123 - required: 124 - spi-cpol 125 126examples: 127 - | 128 spi { 129 #address-cells = <1>; 130 #size-cells = <0>; 131 132 dac@0 { 133 #address-cells = <1>; 134 #size-cells = <0>; 135 compatible = "adi,ad5755"; 136 reg = <0>; 137 spi-max-frequency = <1000000>; 138 spi-cpha; 139 adi,dc-dc-phase = <0>; 140 adi,dc-dc-freq-hz = <410000>; 141 adi,dc-dc-max-microvolt = <23000000>; 142 channel@0 { 143 reg = <0>; 144 adi,mode = <4>; 145 adi,ext-current-sense-resistor; 146 adi,slew = <0 64000 1>; 147 }; 148 channel@1 { 149 reg = <1>; 150 adi,mode = <4>; 151 adi,ext-current-sense-resistor; 152 adi,slew = <0 64000 1>; 153 }; 154 channel@2 { 155 reg = <2>; 156 adi,mode = <4>; 157 adi,ext-current-sense-resistor; 158 adi,slew = <0 64000 1>; 159 }; 160 channel@3 { 161 reg = <3>; 162 adi,mode = <4>; 163 adi,ext-current-sense-resistor; 164 adi,slew = <0 64000 1>; 165 }; 166 }; 167 }; 168... 169