Adding dt-bindings documentation for AD5770R DAC. Signed-off-by: Mircea Caprioru <mircea.caprioru@xxxxxxxxxx> Signed-off-by: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> --- .../bindings/iio/dac/adi,ad5770r.yaml | 185 ++++++++++++++++++ 1 file changed, 185 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml new file mode 100644 index 000000000000..13d6b5ff479d --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml @@ -0,0 +1,185 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2020 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/bindings/iio/adc/adi,ad5770r.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD5770R DAC device driver + +maintainers: + - Mircea Caprioru <mircea.caprioru@xxxxxxxxxx> + +description: | + Bindings for the Analog Devices AD5770R current DAC device. Datasheet can be + found here: + https://www.analog.com/media/en/technical-documentation/data-sheets/AD5770R.pdf + +properties: + compatible: + enum: + - adi,ad5770r + + reg: + maxItems: 1 + + avdd-supply: + description: + AVdd voltage supply. Represents two different supplies in the datasheet + that are in fact the same. + + iovdd-supply: + description: + Voltage supply for the chip interface. + + vref-supply: + description: Specify the voltage of the external reference used. + Available reference options are 1.25 V or 2.5 V. If no + external reference declared then the device will use the + internal reference of 1.25 V. + + adi,external-resistor: + description: Specify if an external 2.5k ohm resistor is used. If not + specified the device will use an internal 2.5k ohm resistor. + The precision resistor is used for reference current generation. + type: boolean + + reset-gpios: + description: GPIO spec for the RESET pin. If specified, it will be + asserted during driver probe. + maxItems: 1 + + channel0: + description: Represents an external channel which are + connected to the DAC. Channel 0 can act both as a current + source and sink. + type: object + + properties: + num: + description: This represents the channel number. + items: + const: 0 + + adi,range-microamp: + description: Output range of the channel. + oneOf: + - $ref: /schemas/types.yaml#/definitions/int32-array + - items: + - enum: [0 300000] + - enum: [-60000 0] + - enum: [-60000 300000] + + channel1: + description: Represents an external channel which are + connected to the DAC. + type: object + + properties: + num: + description: This represents the channel number. + items: + const: 1 + + adi,range-microamp: + description: Output range of the channel. + oneOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - items: + - enum: [0 140000] + - enum: [0 250000] + + channel2: + description: Represents an external channel which are + connected to the DAC. + type: object + + properties: + num: + description: This represents the channel number. + items: + const: 2 + + adi,range-microamp: + description: Output range of the channel. + oneOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - items: + - enum: [0 140000] + - enum: [0 250000] + +patternProperties: + "^channel@([3-5])$": + type: object + description: Represents the external channels which are connected to the DAC. + properties: + num: + description: This represents the channel number. + items: + minimum: 3 + maximum: 5 + + adi,range-microamp: + description: Output range of the channel. + oneOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - items: + - enum: [0 45000] + - enum: [0 100000] + +required: +- reg +- diff-channels +- channel0 +- channel1 +- channel2 +- channel3 +- channel4 +- channel5 + +examples: + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + ad5770r@0 { + compatible = "ad5770r"; + reg = <0>; + spi-max-frequency = <1000000>; + vref-supply = <&vref>; + adi,external-resistor; + reset-gpios = <&gpio 22 0>; + + channel@0 { + num = <0>; + adi,range-microamp = <(-60000) 300000>; + }; + + channel@1 { + num = <1>; + adi,range-microamp = <0 140000>; + }; + + channel@2 { + num = <2>; + adi,range-microamp = <0 55000>; + }; + + channel@3 { + num = <3>; + adi,range-microamp = <0 45000>; + }; + + channel@4 { + num = <4>; + adi,range-microamp = <0 45000>; + }; + + channel@5 { + num = <5>; + adi,range-microamp = <0 45000>; + }; + }; + }; +... -- 2.20.1
