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    Subject[PATCH v4 9/9] staging: iio: ad7780: add device tree binding
    Adds a device tree binding for the ad7780 driver.

    Signed-off-by: Renato Lui Geh <renatogeh@gmail.com>
    ---
    .../bindings/iio/adc/adi,ad7780.txt | 48 +++++++++++++++++++
    1 file changed, 48 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt

    diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
    new file mode 100644
    index 000000000000..440e52555349
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7780.txt
    @@ -0,0 +1,48 @@
    +* Analog Devices AD7170/AD7171/AD7780/AD7781
    +
    +Data sheets:
    +
    +- AD7170:
    + * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7170.pdf
    +- AD7171:
    + * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7171.pdf
    +- AD7780:
    + * https://www.analog.com/media/en/technical-documentation/data-sheets/ad7780.pdf
    +- AD7781:
    + * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7781.pdf
    +
    +Required properties:
    +
    +- compatible: should be one of
    + * "adi,ad7170"
    + * "adi,ad7171"
    + * "adi,ad7780"
    + * "adi,ad7781"
    +- reg: spi chip select number for the device
    +- vref-supply: the regulator supply for the ADC reference voltage
    +
    +Optional properties:
    +
    +- powerdown-gpios: must be the device tree identifier of the PDRST pin. If
    + specified, it will be asserted during driver probe. As the
    + line is active high, it should be marked GPIO_ACTIVE_HIGH.
    +- adi,gain-gpios: must be the device tree identifier of the GAIN pin. Only for
    + the ad778x chips. If specified, it will be asserted during
    + driver probe. As the line is active low, it should be marked
    + GPIO_ACTIVE_LOW.
    +- adi,filter-gpios: must be the device tree identifier of the FILTER pin. Only
    + for the ad778x chips. If specified, it will be asserted
    + during driver probe. As the line is active low, it should be
    + marked GPIO_ACTIVE_LOW.
    +
    +Example:
    +
    +adc@0 {
    + compatible = "adi,ad7780";
    + reg = <0>;
    + vref-supply = <&vdd_supply>
    +
    + powerdown-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
    + adi,gain-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
    + adi,filter-gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
    +};
    --
    2.21.0
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