AK5558 8 channel differential 32-bit delta-sigma ADC

This device supports I2C mode only.

Required properties:

- compatible : "asahi-kasei,ak5558"
- reg : The I2C address of the device.

Optional properties:

- reset-gpios: A GPIO specifier for the power down & reset pin.

Example:

&i2c {
	ak5558: adc@10 {
		compatible = "asahi-kasei,ak5558";
		reg = <0x10>;
		reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
	};
};