input: sensors: add board specific configurations for mmc3416x

MEMSIC MMC3416x 3-axis magnetic sensor

The MEMSIC 3-axis magnetic sensor is a complete 3-axis magnetic sensor with

on-chip signal processing and intergrated i2c bus. It can be connected to host

processor via i2c. It can measure magnetic fields within the full scale range

from -16 Gauss to +16 Gauss.

Required properties:

 - compatible		: Should be "memsic,mmc3416x".

 - reg			: i2c address of the device.

 - vdd-supply		: Analog power supply needed to power up the device.

 - vio-supply		: Digital IO power supply needed for IO and I2C.

 - memsic,dir		: String value of the direction of the ecompass sensor

	chip. There are 8 patterns of direction:

       x > 0 /___________o

               /        /|

              /        / |* 1st pin is here

             /________/ /|

             |_______/|/ |/ z > 0

                    /

                  |/ y > 0

		The above graph shows the coordinate of the sensor chip. Specify the

		following string to memsic,dir to convert it into Android coordinate.

		Note the definition of sensor placement on target board is relative to

		Android portrait mode.

						left	right	up	down

		obverse-x-axis-forward	Y+	Y-	X+	X-

		obverse-x-axis-rightward	X-	X+	Y+	Y-

		obverse-x-axis-backward	Y-	Y+	X-	X+

		obverse-x-axis-leftward	X+	X-	Y-	Y+

		reverse-x-axis-forward	Y-	Y+	X+	X-

		reverse-x-axis-rightward	X-	X+	Y-	Y+

		reverse-x-axis-backward	Y+	Y-	X-	X+

		reverse-x-axis-leftward	X+	X-	Y+	Y-

Optional properites:

 - memsic,auto-report	: Boolean value to indicate if enable auto-report mode.

 Example:

	A chip on 8916 platform with the pattern as the above graph:

	&i2c_0 { /* BLSP1 QUP2 */

		memsic@30 {

				compatible = "memsic,mmc3416x";

				reg = <0x30>;

				vdd-supply = <&pm8916_l17>;

				vio-supply = <&pm8916_l6>;

				memsic,dir = "obverse-x-axis-forward";

				memsic,auto-report;

		};

	};

kionix	Kionix Inc.

marvell	Marvell Technology Group Ltd.

maxim	Maxim Integrated Products

memsic	MEMSIC, Inc

mosaixtech	Mosaix Technologies, Inc.

national	National Semiconductor

nintendo	Nintendo