The AD717x 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. Signed-off-by: Dumitru Ceclan <mitrutzceclan@xxxxxxxxx> --- .../bindings/iio/adc/adi,ad717x.yaml | 158 ++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml new file mode 100644 index 000000000000..f12926e69958 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad717x.yaml @@ -0,0 +1,158 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +# Copyright 2023 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ad717x.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD717X ADC family SPI 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 + + spi-cpol: + type: boolean + + spi-cpha: + type: boolean + + adi,temp-channel: + description: + Enables temperature reading channel + type: boolean + + dependencies: + adi,temp-channel: + compatible: + enum: + - adi,ad7172-2 + - adi,ad7173-8 + - adi,ad7175-2 + + + required: + - compatible + - reg + - interrupts + - spi-cpol + - spi-cpha + +patternProperties: + "^channel@([0-9a-f])$": + type: object + $ref: adc.yaml + unevaluatedProperties: false + + properties: + reg: + description: Channel number + minimum: 0 + maximum: 15 + + diff-channels: + description: + Analog input pins + items: + minimum: 0 + maximum: 31 + + adi,bipolar: + description: Specify if the channel should measure in bipolar mode. + type: boolean + + required: + - reg + - diff-channels + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/interrupt-controller/irq.h> + + spi { + status = "okay"; + + ad7173@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>; + spi-cpol; + spi-cpha; + + adi,temp-channel; + + channel@0 { + reg = <0>; + adi,bipolar; + + diff-channels = <0 1>; + }; + + channel@1 { + reg = <1>; + + diff-channels = <2 3>; + }; + + channel@2 { + reg = <2>; + adi,bipolar; + + diff-channels = <4 5>; + }; + + channel@3 { + reg = <3>; + adi,bipolar; + + diff-channels = <6 7>; + }; + + channel@4 { + reg = <4>; + + diff-channels = <8 9>; + }; + }; + }; -- 2.30.2
