Commit 78bcac7b authored by Andi Shyti's avatar Andi Shyti Committed by Dmitry Torokhov
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Input: add support for the STMicroelectronics FingerTip touchscreen 



The stmfts (ST-Microelectronics FingerTip S) touchscreen device is a
capacitive multi-touch controller mainly for mobile use.  It's connected
through i2c bus at the address 0x49 and it interfaces with userspace
through input event interface.

At the current state it provides a touchscreen multitouch functionality up
to 10 fingers. Each finger is enumerated with a distinctive id (from 0 to
9).

If enabled the device can support single "touch" hovering, by providing
three coordinates, x, y and distance.

It is possible to select the touchkey functionality which provides a basic
two keys interface for "home" and "back" menu, typical in mobile phones.

Signed-off-by: default avatarAndi Shyti <andi.shyti@samsung.com>
Reviewed-by: default avatarJavier Martinez Canillas <javier@osg.samsung.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 131b3de7

Documentation/devicetree/bindings/input/touchscreen/st,stmfts.txt

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* ST-Microelectronics FingerTip touchscreen controller



The ST-Microelectronics FingerTip device provides a basic touchscreen

functionality. Along with it the user can enable the touchkey which can work as

a basic HOME and BACK key for phones.



The driver supports also hovering as an absolute single touch event with x, y, z

coordinates.



Required properties:

- compatible		: must be "st,stmfts"

- reg			: I2C slave address, (e.g. 0x49)

- interrupt-parent	: the phandle to the interrupt controller which provides

			  the interrupt

- interrupts		: interrupt specification

- avdd-supply		: analogic power supply

- vdd-supply		: power supply

- touchscreen-size-x	: see touchscreen.txt

- touchscreen-size-y	: see touchscreen.txt



Optional properties:

- touch-key-connected	: specifies whether the touchkey feature is connected

- ledvdd-supply		: power supply to the touch key leds



Example:



i2c@00000000 {



	/* ... */



	touchscreen@49 {

		compatible = "st,stmfts";

		reg = <0x49>;

		interrupt-parent = <&gpa1>;

		interrupts = <1 IRQ_TYPE_NONE>;

		touchscreen-size-x = <1599>;

		touchscreen-size-y = <2559>;

		touch-key-connected;

		avdd-supply = <&ldo30_reg>;

		vdd-supply = <&ldo31_reg>;

		ledvdd-supply = <&ldo33_reg>;

	};

};

drivers/input/touchscreen/Kconfig

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@@ -1114,6 +1114,17 @@ config TOUCHSCREEN_ST1232 
	  To compile this driver as a module, choose M here: the

	  module will be called st1232_ts.



config TOUCHSCREEN_STMFTS

	tristate "STMicroelectronics STMFTS touchscreen"

	depends on I2C

	depends on LEDS_CLASS

	help

	  Say Y here if you want support for STMicroelectronics

	  STMFTS touchscreen.



	  To compile this driver as a module, choose M here: the

	  module will be called stmfts.



config TOUCHSCREEN_STMPE

	tristate "STMicroelectronics STMPE touchscreens"

	depends on MFD_STMPE

drivers/input/touchscreen/Makefile

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@@ -67,6 +67,7 @@ obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o 
obj-$(CONFIG_TOUCHSCREEN_SILEAD)	+= silead.o

obj-$(CONFIG_TOUCHSCREEN_SIS_I2C)	+= sis_i2c.o

obj-$(CONFIG_TOUCHSCREEN_ST1232)	+= st1232.o

obj-$(CONFIG_TOUCHSCREEN_STMFTS)	+= stmfts.o

obj-$(CONFIG_TOUCHSCREEN_STMPE)		+= stmpe-ts.o

obj-$(CONFIG_TOUCHSCREEN_SUN4I)		+= sun4i-ts.o

obj-$(CONFIG_TOUCHSCREEN_SUR40)		+= sur40.o

drivers/input/touchscreen/stmfts.c

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