From: Dumitru Ceclan <mitrutzceclan@xxxxxxxxx> The AD7173 family offer a complete integrated Sigma-Delta ADC solution which can be used in high precision, low noise single channel applications or higher speed multiplexed applications. The Sigma-Delta ADC is intended primarily for measurement of signals close to DC but also delivers outstanding performance with input bandwidths out to ~10kHz. Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> # except reference_select Signed-off-by: Dumitru Ceclan <mitrutzceclan@xxxxxxxxx> --- V3 -> V4 - include supply attributes - add channel attribute for selecting conversion reference .../bindings/iio/adc/adi,ad7173.yaml | 166 ++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml new file mode 100644 index 000000000000..92aa352b6653 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml @@ -0,0 +1,166 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2023 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad7173.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD7173 ADC device driver + +maintainers: + - Ceclan Dumitru <dumitru.ceclan@xxxxxxxxxx> + +description: | + Bindings for the Analog Devices AD717X ADC's. Datasheets for supported chips: + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7176-2.pdf + +properties: + compatible: + enum: + - adi,ad7172-2 + - adi,ad7173-8 + - adi,ad7175-2 + - adi,ad7176-2 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + spi-max-frequency: + maximum: 20000000 + + refin-supply: + description: external reference supply, can be used as reference for conversion. + + refin2-supply: + description: external reference supply, can be used as reference for conversion. + + avdd-supply: + description: avdd supply, can be used as reference for conversion. + + dependencies: + refin2-supply: + properties: + compatible: + adi,ad7173-8 + + required: + - compatible + - reg + - interrupts + +patternProperties: + "^channel@[0-9a-f]$": + type: object + $ref: adc.yaml + unevaluatedProperties: false + + properties: + reg: + minimum: 0 + maximum: 15 + + diff-channels: + items: + minimum: 0 + maximum: 31 + + adi,reference-select: + description: | + Select the reference source to use when converting on + the specific channel. Valid values are: + 0: REFIN(+)/REFIN(−). + 1: REFIN2(+)/REFIN2(−) + 2: REFOUT/AVSS (Internal reference) + 3: AVDD + + External reference 2 only available on ad7173-8. + If not specified, internal reference used. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [0, 1, 2, 3] + default: 2 + + bipolar: + type: boolean + + required: + - reg + - diff-channels + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + + - if: + properties: + compatible: + contains: + const: adi,ad7173-8 + then: + else: + patternProperties: + "^channel@[0-9a-f]$": + properties: + enum: [0, 2, 3] + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/interrupt-controller/irq.h> + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad7173-8"; + reg = <0>; + + #address-cells = <1>; + #size-cells = <0>; + + interrupts = <25 IRQ_TYPE_EDGE_FALLING>; + interrupt-parent = <&gpio>; + spi-max-frequency = <5000000>; + + channel@0 { + reg = <0>; + bipolar; + diff-channels = <0 1>; + }; + + channel@1 { + reg = <1>; + diff-channels = <2 3>; + }; + + channel@2 { + reg = <2>; + bipolar; + diff-channels = <4 5>; + }; + + channel@3 { + reg = <3>; + bipolar; + diff-channels = <6 7>; + }; + + channel@4 { + reg = <4>; + diff-channels = <8 9>; + }; + }; + }; -- 2.42.0
