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1# SPDX-License-Identifier: GPL-2.02%YAML 1.23---4$id: http://devicetree.org/schemas/iio/adc/adi,ad7780.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: Analog Devices AD7170/AD7171/AD7780/AD7781 analog to digital converters8 9maintainers:10 - Michael Hennerich <michael.hennerich@analog.com>11 12description: |13 The ad7780 is a sigma-delta analog to digital converter. This driver provides14 reading voltage values and status bits from both the ad778x and ad717x series.15 Its interface also allows writing on the FILTER and GAIN GPIO pins on the16 ad778x.17 18 Specifications on the converters can be found at:19 AD7170:20 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf21 AD7171:22 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf23 AD7780:24 https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf25 AD7781:26 https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf27 28properties:29 compatible:30 enum:31 - adi,ad717032 - adi,ad717133 - adi,ad778034 - adi,ad778135 36 reg:37 maxItems: 138 39 avdd-supply:40 description:41 The regulator supply for the ADC reference voltage.42 43 powerdown-gpios:44 description:45 Must be the device tree identifier of the PDRST pin. If46 specified, it will be asserted during driver probe. As the47 line is active high, it should be marked GPIO_ACTIVE_HIGH.48 maxItems: 149 50 adi,gain-gpios:51 description:52 Must be the device tree identifier of the GAIN pin. Only for53 the ad778x chips. If specified, it will be asserted during54 driver probe. As the line is active low, it should be marked55 GPIO_ACTIVE_LOW.56 maxItems: 157 58 adi,filter-gpios:59 description:60 Must be the device tree identifier of the FILTER pin. Only61 for the ad778x chips. If specified, it will be asserted62 during driver probe. As the line is active low, it should be63 marked GPIO_ACTIVE_LOW.64 maxItems: 165 66required:67 - compatible68 - reg69 70additionalProperties: false71 72examples:73 - |74 #include <dt-bindings/gpio/gpio.h>75 spi {76 #address-cells = <1>;77 #size-cells = <0>;78 79 adc@0 {80 compatible = "adi,ad7780";81 reg = <0>;82 83 avdd-supply = <&vdd_supply>;84 powerdown-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;85 adi,gain-gpios = <&gpio1 5 GPIO_ACTIVE_LOW>;86 adi,filter-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>;87 };88 };89