Analog Devices AD5933/AD5934 Impedance Converter, Network Analyzer

https://www.analog.com/media/en/technical-documentation/data-sheets/AD5933.pdf
https://www.analog.com/media/en/technical-documentation/data-sheets/AD5934.pdf

Required properties:
 - compatible : should be one of
		"adi,ad5933"
		"adi,ad5934"
 - reg : the I2C address.
 - vdd-supply : The regulator supply for DVDD, AVDD1 and AVDD2 when they
   are connected together.

Optional properties:
- clocks : external clock reference.
- clock-names : must be "mclk" if clocks is set.

Example for a I2C device node:

	impedance-analyzer@0d {
		compatible = "adi,adxl345";
		reg = <0x0d>;
		vdd-supply = <&vdd_supply>;
		clocks = <&ref_clk>;
		clock-names = "mclk";
	};
