* Sensor Controller

Required properties:
- compatible: the sensor name,exampel: "gs_mma8452";
- reg: i2c slave address;
- type: sensor type;
- irq-gpio: sensor interrupt gpio pin;
- irq_enable: 1 use irq; 0 use pull mode;
- poll_delay_ms: pull delay time if use pull mode;
- layout: sensor orientation, choose 1-8 to make product work fine;

Example:

	hall_sensor: hall-mh248 {
		compatible = "hall-mh248";
		pinctrl-names = "default";
		pinctrl-0 = <&mh248_irq_gpio>;
		irq-gpio = <&gpio1 2 IRQ_TYPE_EDGE_RISING>;
		hall-active = <1>;
		status = "okay";
	};
  	sensor@1d {
		compatible = "gs_mma8452";
		reg = <0x1d>;
		type = <SENSOR_TYPE_ACCEL>;
		irq-gpio = <&gpio8 GPIO_A0 IRQ_TYPE_EDGE_FALLING>;
		irq_enable = <1>;
		poll_delay_ms = <30>;
		layout = <1>;
	};
		sensor@19 {
		compatible = "gs_lis3dh";
		reg = <0x19>;
		type = <SENSOR_TYPE_ACCEL>;
		irq-gpio = <&gpio0 GPIO_A0 IRQ_TYPE_LEVEL_LOW>;
		irq_enable = <1>;
		poll_delay_ms = <30>;
		layout = <1>;
	};



TYPE: 
      
	 SENSOR_TYPE_NULL  0     
	 SENSOR_TYPE_ANGLE 1
	 SENSOR_TYPE_ACCEL 2
	 SENSOR_TYPE_COMPASS 3   
	 SENSOR_TYPE_GYROSCOPE 4 
	 SENSOR_TYPE_LIGHT 5     
	 SENSOR_TYPE_PROXIMITY 6
	 SENSOR_TYPE_TEMPERATURE 7       
 	 SENSOR_TYPE_PRESSURE 8
	 SENSOR_TYPE_HALL 9
	 define SENSOR_NUM_TYPES 10