adi,ad7780.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/iio/adc/adi,ad7780.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Analog Devices AD7170/AD7171/AD7780/AD7781 analog to digital converters
    8 
    9 maintainers:
   10   - Michael Hennerich <michael.hennerich@analog.com>
   11 
   12 description: |
   13   The ad7780 is a sigma-delta analog to digital converter. This driver provides
   14   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 the
   16   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.pdf
   21     AD7171:
   22       https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
   23     AD7780:
   24       https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
   25     AD7781:
   26       https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
   27 
   28 properties:
   29   compatible:
   30     enum:
   31       - adi,ad7170
   32       - adi,ad7171
   33       - adi,ad7780
   34       - adi,ad7781
   35 
   36   reg:
   37     maxItems: 1
   38 
   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. If
   46       specified, it will be asserted during driver probe. As the
   47       line is active high, it should be marked GPIO_ACTIVE_HIGH.
   48     maxItems: 1
   49 
   50   adi,gain-gpios:
   51     description:
   52       Must be the device tree identifier of the GAIN pin. Only for
   53       the ad778x chips. If specified, it will be asserted during
   54       driver probe. As the line is active low, it should be marked
   55       GPIO_ACTIVE_LOW.
   56     maxItems: 1
   57 
   58   adi,filter-gpios:
   59     description:
   60       Must be the device tree identifier of the FILTER pin. Only
   61       for the ad778x chips. If specified, it will be asserted
   62       during driver probe. As the line is active low, it should be
   63       marked GPIO_ACTIVE_LOW.
   64     maxItems: 1
   65 
   66 required:
   67   - compatible
   68   - reg
   69 
   70 additionalProperties: false
   71 
   72 examples:
   73   - |
   74     #include <dt-bindings/gpio/gpio.h>
   75     spi0 {
   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     };

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sys/contrib/device-tree/Bindings/iio/adc/adi,ad7780.yaml