| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/iio/dac/adi,ltc2688.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Analog Devices LTC2688 DAC |
| 8 | |
| 9 | maintainers: |
| 10 | - Nuno Sá <nuno.sa@analog.com> |
| 11 | |
| 12 | description: | |
| 13 | Analog Devices LTC2688 16 channel, 16 bit, +-15V DAC |
| 14 | https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2688.pdf |
| 15 | |
| 16 | properties: |
| 17 | compatible: |
| 18 | enum: |
| 19 | - adi,ltc2688 |
| 20 | |
| 21 | reg: |
| 22 | maxItems: 1 |
| 23 | |
| 24 | vcc-supply: |
| 25 | description: Analog Supply Voltage Input. |
| 26 | |
| 27 | iovcc-supply: |
| 28 | description: Digital Input/Output Supply Voltage. |
| 29 | |
| 30 | vref-supply: |
| 31 | description: |
| 32 | Reference Input/Output. The voltage at the REF pin sets the full-scale |
| 33 | range of all channels. If not provided the internal reference is used and |
| 34 | also provided on the VREF pin". |
| 35 | |
| 36 | clr-gpios: |
| 37 | description: |
| 38 | If specified, it will be asserted during driver probe. As the line is |
| 39 | active low, it should be marked GPIO_ACTIVE_LOW. |
| 40 | maxItems: 1 |
| 41 | |
| 42 | '#address-cells': |
| 43 | const: 1 |
| 44 | |
| 45 | '#size-cells': |
| 46 | const: 0 |
| 47 | |
| 48 | patternProperties: |
| 49 | "^channel@([0-9]|1[0-5])$": |
| 50 | type: object |
| 51 | additionalProperties: false |
| 52 | |
| 53 | properties: |
| 54 | reg: |
| 55 | description: The channel number representing the DAC output channel. |
| 56 | maximum: 15 |
| 57 | |
| 58 | adi,toggle-mode: |
| 59 | description: |
| 60 | Set the channel as a toggle enabled channel. Toggle operation enables |
| 61 | fast switching of a DAC output between two different DAC codes without |
| 62 | any SPI transaction. |
| 63 | type: boolean |
| 64 | |
| 65 | adi,output-range-microvolt: |
| 66 | description: Specify the channel output full scale range. |
| 67 | oneOf: |
| 68 | - items: |
| 69 | - const: 0 |
| 70 | - enum: [5000000, 10000000] |
| 71 | - items: |
| 72 | - const: -5000000 |
| 73 | - const: 5000000 |
| 74 | - items: |
| 75 | - const: -10000000 |
| 76 | - const: 10000000 |
| 77 | - items: |
| 78 | - const: -15000000 |
| 79 | - const: 15000000 |
| 80 | |
| 81 | adi,overrange: |
| 82 | description: Enable 5% overrange over the selected full scale range. |
| 83 | type: boolean |
| 84 | |
| 85 | clocks: |
| 86 | maxItems: 1 |
| 87 | |
| 88 | adi,toggle-dither-input: |
| 89 | description: |
| 90 | Selects the TGPx pin to be associated with this channel. This setting |
| 91 | only makes sense for toggle or dither enabled channels. If |
| 92 | @adi,toggle-mode is not set and this property is given, the channel is |
| 93 | assumed to be a dither capable channel. Note that multiple channels |
| 94 | can be mapped to the same pin. If this setting is given, the |
| 95 | respective @clock must also be provided. Mappings between this and |
| 96 | input pins |
| 97 | 0 - TGP1 |
| 98 | 1 - TGP2 |
| 99 | 2 - TGP3 |
| 100 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 101 | enum: [0, 1, 2] |
| 102 | |
| 103 | dependencies: |
| 104 | adi,toggle-dither-input: [ clocks ] |
| 105 | |
| 106 | required: |
| 107 | - reg |
| 108 | |
| 109 | required: |
| 110 | - compatible |
| 111 | - reg |
| 112 | |
| 113 | additionalProperties: false |
| 114 | |
| 115 | examples: |
| 116 | - | |
| 117 | |
| 118 | spi { |
| 119 | #address-cells = <1>; |
| 120 | #size-cells = <0>; |
| 121 | ltc2688: ltc2688@0 { |
| 122 | compatible = "adi,ltc2688"; |
| 123 | reg = <0>; |
| 124 | |
| 125 | vcc-supply = <&vcc>; |
| 126 | iovcc-supply = <&vcc>; |
| 127 | vref-supply = <&vref>; |
| 128 | |
| 129 | #address-cells = <1>; |
| 130 | #size-cells = <0>; |
| 131 | channel@0 { |
| 132 | reg = <0>; |
| 133 | adi,toggle-mode; |
| 134 | adi,overrange; |
| 135 | }; |
| 136 | |
| 137 | channel@1 { |
| 138 | reg = <1>; |
| 139 | adi,output-range-microvolt = <0 10000000>; |
| 140 | |
| 141 | clocks = <&clock_tgp3>; |
| 142 | adi,toggle-dither-input = <2>; |
| 143 | }; |
| 144 | }; |
| 145 | }; |
| 146 | |
| 147 | ... |