| Alexandru Tachici | ea52c21 | 2020-02-18 14:10:31 +0200 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| 2 | # Copyright 2020 Analog Devices Inc. |
| 3 | %YAML 1.2 |
| 4 | --- |
| Fabio Estevam | bc4be55 | 2020-03-27 10:18:25 -0300 | [diff] [blame^] | 5 | $id: http://devicetree.org/schemas/iio/dac/adi,ad5770r.yaml# |
| Alexandru Tachici | ea52c21 | 2020-02-18 14:10:31 +0200 | [diff] [blame] | 6 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 7 | |
| 8 | title: Analog Devices AD5770R DAC device driver |
| 9 | |
| 10 | maintainers: |
| 11 | - Mircea Caprioru <mircea.caprioru@analog.com> |
| 12 | |
| 13 | description: | |
| 14 | Bindings for the Analog Devices AD5770R current DAC device. Datasheet can be |
| 15 | found here: |
| 16 | https://www.analog.com/media/en/technical-documentation/data-sheets/AD5770R.pdf |
| 17 | |
| 18 | properties: |
| 19 | compatible: |
| 20 | enum: |
| 21 | - adi,ad5770r |
| 22 | |
| 23 | reg: |
| 24 | maxItems: 1 |
| 25 | |
| 26 | avdd-supply: |
| 27 | description: |
| 28 | AVdd voltage supply. Represents two different supplies in the datasheet |
| 29 | that are in fact the same. |
| 30 | |
| 31 | iovdd-supply: |
| 32 | description: |
| 33 | Voltage supply for the chip interface. |
| 34 | |
| 35 | vref-supply: |
| 36 | description: Specify the voltage of the external reference used. |
| 37 | Available reference options are 1.25 V or 2.5 V. If no |
| 38 | external reference declared then the device will use the |
| 39 | internal reference of 1.25 V. |
| 40 | |
| 41 | adi,external-resistor: |
| 42 | description: Specify if an external 2.5k ohm resistor is used. If not |
| 43 | specified the device will use an internal 2.5k ohm resistor. |
| 44 | The precision resistor is used for reference current generation. |
| 45 | type: boolean |
| 46 | |
| 47 | reset-gpios: |
| 48 | description: GPIO spec for the RESET pin. If specified, it will be |
| 49 | asserted during driver probe. |
| 50 | maxItems: 1 |
| 51 | |
| 52 | channel0: |
| 53 | description: Represents an external channel which are |
| 54 | connected to the DAC. Channel 0 can act both as a current |
| 55 | source and sink. |
| 56 | type: object |
| 57 | |
| 58 | properties: |
| 59 | num: |
| 60 | description: This represents the channel number. |
| 61 | items: |
| 62 | const: 0 |
| 63 | |
| 64 | adi,range-microamp: |
| 65 | description: Output range of the channel. |
| 66 | oneOf: |
| 67 | - $ref: /schemas/types.yaml#/definitions/int32-array |
| 68 | - items: |
| 69 | - enum: [0 300000] |
| 70 | - enum: [-60000 0] |
| 71 | - enum: [-60000 300000] |
| 72 | |
| 73 | channel1: |
| 74 | description: Represents an external channel which are |
| 75 | connected to the DAC. |
| 76 | type: object |
| 77 | |
| 78 | properties: |
| 79 | num: |
| 80 | description: This represents the channel number. |
| 81 | items: |
| 82 | const: 1 |
| 83 | |
| 84 | adi,range-microamp: |
| 85 | description: Output range of the channel. |
| 86 | oneOf: |
| 87 | - $ref: /schemas/types.yaml#/definitions/uint32-array |
| 88 | - items: |
| 89 | - enum: [0 140000] |
| 90 | - enum: [0 250000] |
| 91 | |
| 92 | channel2: |
| 93 | description: Represents an external channel which are |
| 94 | connected to the DAC. |
| 95 | type: object |
| 96 | |
| 97 | properties: |
| 98 | num: |
| 99 | description: This represents the channel number. |
| 100 | items: |
| 101 | const: 2 |
| 102 | |
| 103 | adi,range-microamp: |
| 104 | description: Output range of the channel. |
| 105 | oneOf: |
| 106 | - $ref: /schemas/types.yaml#/definitions/uint32-array |
| 107 | - items: |
| 108 | - enum: [0 140000] |
| 109 | - enum: [0 250000] |
| 110 | |
| 111 | patternProperties: |
| 112 | "^channel@([3-5])$": |
| 113 | type: object |
| 114 | description: Represents the external channels which are connected to the DAC. |
| 115 | properties: |
| 116 | num: |
| 117 | description: This represents the channel number. |
| 118 | items: |
| 119 | minimum: 3 |
| 120 | maximum: 5 |
| 121 | |
| 122 | adi,range-microamp: |
| 123 | description: Output range of the channel. |
| 124 | oneOf: |
| 125 | - $ref: /schemas/types.yaml#/definitions/uint32-array |
| 126 | - items: |
| 127 | - enum: [0 45000] |
| 128 | - enum: [0 100000] |
| 129 | |
| 130 | required: |
| 131 | - reg |
| 132 | - diff-channels |
| 133 | - channel0 |
| 134 | - channel1 |
| 135 | - channel2 |
| 136 | - channel3 |
| 137 | - channel4 |
| 138 | - channel5 |
| 139 | |
| 140 | examples: |
| 141 | - | |
| 142 | spi { |
| 143 | #address-cells = <1>; |
| 144 | #size-cells = <0>; |
| 145 | |
| 146 | ad5770r@0 { |
| Fabio Estevam | 7d6243a | 2020-03-27 10:18:23 -0300 | [diff] [blame] | 147 | compatible = "adi,ad5770r"; |
| Alexandru Tachici | ea52c21 | 2020-02-18 14:10:31 +0200 | [diff] [blame] | 148 | reg = <0>; |
| 149 | spi-max-frequency = <1000000>; |
| 150 | vref-supply = <&vref>; |
| 151 | adi,external-resistor; |
| 152 | reset-gpios = <&gpio 22 0>; |
| 153 | |
| 154 | channel@0 { |
| 155 | num = <0>; |
| 156 | adi,range-microamp = <(-60000) 300000>; |
| 157 | }; |
| 158 | |
| 159 | channel@1 { |
| 160 | num = <1>; |
| 161 | adi,range-microamp = <0 140000>; |
| 162 | }; |
| 163 | |
| 164 | channel@2 { |
| 165 | num = <2>; |
| 166 | adi,range-microamp = <0 55000>; |
| 167 | }; |
| 168 | |
| 169 | channel@3 { |
| 170 | num = <3>; |
| 171 | adi,range-microamp = <0 45000>; |
| 172 | }; |
| 173 | |
| 174 | channel@4 { |
| 175 | num = <4>; |
| 176 | adi,range-microamp = <0 45000>; |
| 177 | }; |
| 178 | |
| 179 | channel@5 { |
| 180 | num = <5>; |
| 181 | adi,range-microamp = <0 45000>; |
| 182 | }; |
| 183 | }; |
| 184 | }; |
| 185 | ... |