mcp3021 properties Required properties: - compatible: Must be one of the following: - "microchip,mcp3021" for mcp3021 - "microchip,mcp3221" for mcp3221 - reg: I2C address Optional properties: - reference-voltage-microvolt Reference voltage in microvolt (uV) Example: mcp3021@4d { compatible = "microchip,mcp3021"; reg = <0x4d>; reference-voltage-microvolt = <4500000>; /* 4.5 V */ };