The IAM20680 sensor is 6-axis gyroscope+accelerometer combo
device which is made by InvenSense Inc.

Required properties:

 - compatible   : Should be "invn,iam20680".
 - reg          : the I2C address which depends on the AD0 pin.
 - gpios        : INVENSENSE GPIO in the format described by ../gpio/gpio.txt

Optional properties:
 - inven,vdd_ana-supply :
 - inven,vcc_i2c-supply :
 - inven,gpio_int1 :
 - axis_map_x :
 - axis_map_y :
 - axis_map_z :
 - negate_x   :
 - negate_y   :
 - negate_z   :
 - fs_range :
 - poll_interval :
 - min_interval :
 - inven,secondary_reg :
 - inven,secondary_type :
 - inven,secondary_name :
 - inven,secondary_axis_map_x :
 - inven,secondary_axis_map_y :
 - inven,secondary_axis_map_z :
 - inven,secondary_negate_x :
 - inven,secondary_negate_y :
 - inven,secondary_negate_z :
 - inven,aux_type :
 - inven,aux_name :
 - inven,aux_reg :
 - inven,read_only_slave_type :
 - inven,read_only_slave_name :
 - inven,read_only_slave_reg :

Example:
	iam20680@69 {
		compatible = "inven,iam20680";
		reg = <0x69>;
		pinctrl-names = "default";
		pinctrl-0 = <&int1_default>;
		interrupt-parent = <&tlmm_pinmux>;
		interrupts = <78 IRQ_TYPE_EDGE_RISING>;
		inven,vdd_ana-supply = <&pm8941_l17>;
		inven,vcc_i2c-supply = <&pm8941_lvs1>;
		inven,gpio_int1 = <&msmgpio 73 0x00>;
		axis_map_x = <1>;
		axis_map_y = <0>;
		axis_map_z = <2>;
		negate_x = <1>;
		negate_y = <0>;
		negate_z = <0>;
		fs_range = <0x00>;
		poll_interval = <200>;
		min_interval = <5>;
		inven,secondary_reg = <0x0c>;
		/* If no compass sensor,
		 * replace "compass" with "none"
		 */
		inven,secondary_type = "compass";
		inven,secondary_name = "ak09911";
		inven,secondary_axis_map_x = <1>;
		inven,secondary_axis_map_y = <0>;
		inven,secondary_axis_map_z = <2>;
		inven,secondary_negate_x = <1>;
		inven,secondary_negate_y = <1>;
		inven,secondary_negate_z = <1>;
		/* If no pressure sensor,
		 * replace "pressure" with "none"
		 */
		inven,aux_type = "pressure";
		inven,aux_name = "bmp280";
		inven,aux_reg = <0x76>;
		/* If no ALS sensor
		 * replace "als" with "none"
		 */
		inven,read_only_slave_type = "als";
		inven,read_only_slave_name = "apds9930";
		inven,read_only_slave_reg = <0x39>;
	};