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-* 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>;
-};