input: sensors: add Dyna Image AP3426 ALPS sensor driver

AP3426 3-in-1 digital ALS+PS+IRLED module

AP3426 is a module integrated with a digital ambient light sensor, a proximity

sensor, and an IR LED in a single package. It provides multiple gain ambient

light detection as well as external object distance detection. It can be

connected to host processor via i2c.

Required properties:

 - compatible		: Should be "di,ap3426".

 - reg			: i2c slave address of this device.

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

 - vio-supply		: Digital IO power supply needed for IO and i2c.

 - interrupt-parent	: The interrupt controler this device connected to.

 - interrupts		: L/P sample interrupt to indicate new data ready.

 - pinctrl-names	: pinctrl configuration names of this device. Should be "default" and "sleep".

 - pinctrl-0		: Should specify pin control groups used for this sensor.

 - pinctrl-1		: Should specify pin control groups used for this sensor.

 - di,irq-gpio		: GPIO pin for interrupt of this device.

 - di,als-cal		: Coefficient to calibrate this device for specific board.

 - di,als-gain		: ALS gain configuration for the device. 0 for 32768,

		1 for 8192, 2 for 2048 and 3 for 512.

 - di,als-persist	: Interrupt persist configuration for the device. It indicates

		how much conversion cycles will trigger ALS interrupt. The maximum value

		is 63.

 - di,ps-led-driver	: Specifies proximity LED driver ratio based on 140mA of this device.

		0 for 16.7%, 1 for 33.3%, 2 for 66.7% and 3 for 100%.

 - di,ps-mean-time	: Configures response time of proximity detection cycle. 0 for conversion

		time 5ms, 1 for conversion time 9.6ms, 2 for conversion time 14.1ms and 3 for

		conversion time 18.7ms.

 - di,ps-integrated-time: Selects the duration at which the device's ADC will sample the

		photodiode current signal.

 - di,wait-time		: Idle frames inserted to the device's conversion cycle. Each frame is

		5ms and the maximum number of frames is 255.

Optional properties:

 - di,ps-distance-table	: Calibrated ADC value of proximity sensor to indicate the distance of

		the object in centimeter.

Example:

i2c@78b5000 { /* BLSP1 QUP1 */

	di@1e {

		compatible = "di,ap3426";

		reg = <0x1e>;

		vdd-supply = <&pm8909_l17>;

		vio-supply = <&pm8909_l6>;

		interrupt-parent = <&msm_gpio>;

		interrupts = <94 0x2002>;

		pinctrl-names = "default","sleep";

		pinctrl-0 = <&ap3426_default>;

		pinctrl-1 = <&ap3426_sleep>;

		di,irq-gpio = <&msm_gpio 94 0x2002>;

		di,als-cal = <6>;

		di,als-gain = <0>;

		di,als-persist = <1>;

		di,ps-gain = <1>;

		di,ps-persist = <2>;

		di,ps-led-driver = <3>;

		di,ps-mean-time = <0>;

		di,ps-integrated-time = <0>;

		di,wait-time = <0>;

		di,ps-distance-table = <1023, 740, 340, 200, 180, 176>;

	};

};

cortina	Cortina Systems, Inc.

dallas	Maxim Integrated Products (formerly Dallas Semiconductor)

denx	Denx Software Engineering

di	Dyna Image Corporation

emmicro	EM Microelectronic

epson	Seiko Epson Corp.

est	ESTeem Wireless Modems