Texas Instruments AFE4404 Heart rate and Pulse Oximeter

Required properties:
 - compatible		: Should be "ti,afe4404".
 - reg			: I2C address of the device.
 - tx-supply		: Regulator supply to transmitting LEDs.
 - interrupt-parent	: Phandle to he parent interrupt controller.
 - interrupts		: The interrupt line the device ADC_RDY pin is
			  connected to. For details refer to,
			  ../interrupt-controller/interrupts.txt.

Optional properties:
 - reset-gpios		: GPIO used to reset the device.
			  For details refer to, ../gpio/gpio.txt.

Example:

&i2c2 {
	heart_mon@58 {
		compatible = "ti,afe4404";
		reg = <0x58>;

		tx-supply = <&vbat>;

		interrupt-parent = <&gpio1>;
		interrupts = <28 IRQ_TYPE_EDGE_RISING>;

		reset-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
	};
};