89 lines
2.5 KiB
YAML
89 lines
2.5 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/adi,ad7780.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Analog Devices AD7170/AD7171/AD7780/AD7781 analog to digital converters
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maintainers:
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- Michael Hennerich <michael.hennerich@analog.com>
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description: |
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The ad7780 is a sigma-delta analog to digital converter. This driver provides
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reading voltage values and status bits from both the ad778x and ad717x series.
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Its interface also allows writing on the FILTER and GAIN GPIO pins on the
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ad778x.
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Specifications on the converters can be found at:
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AD7170:
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https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
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AD7171:
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https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
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AD7780:
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https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
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AD7781:
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https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
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properties:
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compatible:
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enum:
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- adi,ad7170
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- adi,ad7171
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- adi,ad7780
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- adi,ad7781
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reg:
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maxItems: 1
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avdd-supply:
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description:
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The regulator supply for the ADC reference voltage.
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powerdown-gpios:
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description:
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Must be the device tree identifier of the PDRST pin. If
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specified, it will be asserted during driver probe. As the
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line is active high, it should be marked GPIO_ACTIVE_HIGH.
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maxItems: 1
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adi,gain-gpios:
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description:
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Must be the device tree identifier of the GAIN pin. Only for
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the ad778x chips. If specified, it will be asserted during
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driver probe. As the line is active low, it should be marked
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GPIO_ACTIVE_LOW.
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maxItems: 1
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adi,filter-gpios:
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description:
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Must be the device tree identifier of the FILTER pin. Only
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for the ad778x chips. If specified, it will be asserted
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during driver probe. As the line is active low, it should be
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marked GPIO_ACTIVE_LOW.
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maxItems: 1
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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adc@0 {
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compatible = "adi,ad7780";
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reg = <0>;
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avdd-supply = <&vdd_supply>;
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powerdown-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
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adi,gain-gpios = <&gpio1 5 GPIO_ACTIVE_LOW>;
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adi,filter-gpios = <&gpio2 15 GPIO_ACTIVE_LOW>;
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};
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};
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