| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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,ad5758.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Analog Devices AD5758 DAC |
| 8 | |
| 9 | maintainers: |
| 10 | - Michael Hennerich <Michael.Hennerich@analog.com> |
| 11 | |
| 12 | properties: |
| 13 | compatible: |
| 14 | const: adi,ad5758 |
| 15 | |
| 16 | reg: |
| 17 | maxItems: 1 |
| 18 | |
| 19 | spi-cpha: true |
| 20 | |
| 21 | adi,dc-dc-mode: |
| 22 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 23 | enum: [1, 2, 3] |
| 24 | description: | |
| 25 | Mode of operation of the dc-to-dc converter |
| 26 | Dynamic Power Control (DPC) |
| 27 | In this mode, the AD5758 circuitry senses the output voltage and |
| 28 | dynamically regulates the supply voltage, VDPC+, to meet compliance |
| 29 | requirements plus an optimized headroom voltage for the output buffer. |
| 30 | |
| 31 | Programmable Power Control (PPC) |
| 32 | In this mode, the VDPC+ voltage is user-programmable to a fixed level |
| 33 | that needs to accommodate the maximum output load required. |
| 34 | |
| 35 | The output of the DAC core is either converted to a current or |
| 36 | voltage output at the VIOUT pin. Only one mode can be enabled at |
| 37 | any one time. |
| 38 | |
| 39 | The following values are currently supported: |
| 40 | * 1: DPC current mode |
| 41 | * 2: DPC voltage mode |
| 42 | * 3: PPC current mode |
| 43 | |
| 44 | Depending on the selected output mode (voltage or current) one of the |
| 45 | two properties must be present: |
| 46 | |
| 47 | adi,range-microvolt: |
| 48 | description: | |
| 49 | Voltage output range specified as <minimum, maximum> |
| 50 | oneOf: |
| 51 | - items: |
| 52 | - const: 0 |
| 53 | - enum: [5000000, 10000000] |
| 54 | - items: |
| 55 | - const: -5000000 |
| 56 | - const: 5000000 |
| 57 | - items: |
| 58 | - const: -10000000 |
| 59 | - const: 10000000 |
| 60 | |
| 61 | adi,range-microamp: |
| 62 | description: | |
| 63 | Current output range specified as <minimum, maximum> |
| 64 | oneOf: |
| 65 | - items: |
| 66 | - const: 0 |
| 67 | - enum: [20000, 24000] |
| 68 | - items: |
| 69 | - const: 4 |
| 70 | - const: 24000 |
| 71 | - items: |
| 72 | - const: -20000 |
| 73 | - const: 20000 |
| 74 | - items: |
| 75 | - const: -24000 |
| 76 | - const: 24000 |
| 77 | - items: |
| 78 | - const: -1000 |
| 79 | - const: 22000 |
| 80 | |
| 81 | reset-gpios: |
| 82 | maxItems: 1 |
| 83 | |
| 84 | adi,dc-dc-ilim-microamp: |
| 85 | enum: [150000, 200000, 250000, 300000, 350000, 400000] |
| 86 | description: | |
| 87 | The dc-to-dc converter current limit. |
| 88 | |
| 89 | adi,slew-time-us: |
| 90 | description: | |
| 91 | The time it takes for the output to reach the full scale [uS] |
| 92 | minimum: 133 |
| 93 | maximum: 1023984375 |
| 94 | |
| 95 | required: |
| 96 | - compatible |
| 97 | - reg |
| 98 | - spi-cpha |
| 99 | - adi,dc-dc-mode |
| 100 | |
| 101 | allOf: |
| 102 | - $ref: /schemas/spi/spi-peripheral-props.yaml# |
| 103 | - if: |
| 104 | properties: |
| 105 | adi,dc-dc-mode: |
| 106 | enum: [1, 3] |
| 107 | then: |
| 108 | properties: |
| 109 | adi,range-microvolt: false |
| 110 | required: |
| 111 | - adi,range-microamp |
| 112 | else: |
| 113 | properties: |
| 114 | adi,range-microamp: false |
| 115 | required: |
| 116 | - adi,range-microvolt |
| 117 | |
| 118 | unevaluatedProperties: false |
| 119 | |
| 120 | examples: |
| 121 | - | |
| 122 | spi { |
| 123 | #address-cells = <1>; |
| 124 | #size-cells = <0>; |
| 125 | |
| 126 | dac@0 { |
| 127 | compatible = "adi,ad5758"; |
| 128 | reg = <0>; |
| 129 | spi-max-frequency = <1000000>; |
| 130 | spi-cpha; |
| 131 | |
| 132 | reset-gpios = <&gpio 22 0>; |
| 133 | |
| 134 | adi,dc-dc-mode = <2>; |
| 135 | adi,range-microvolt = <0 10000000>; |
| 136 | adi,dc-dc-ilim-microamp = <200000>; |
| 137 | adi,slew-time-us = <125000>; |
| 138 | }; |
| 139 | }; |
| 140 | ... |