Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit a93ad65d authored by Hans de Goede's avatar Hans de Goede Committed by Dmitry Torokhov
Browse files

Input: add support for ChipOne icn8318 based touchscreens 



The ChipOne icn8318 is an i2c capacitive touchscreen controller typically
used in cheap android tablets, this commit adds a driver for it.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent d16a33bb

Documentation/devicetree/bindings/input/touchscreen/chipone_icn8318.txt

0 → 100644
+46 −0
Original line number Diff line number Diff line 
* ChipOne icn8318 I2C touchscreen controller



Required properties:

 - compatible		  : "chipone,icn8318"

 - reg			  : I2C slave address of the chip (0x40)

 - interrupt-parent	  : a phandle pointing to the interrupt controller

			    serving the interrupt for this chip

 - interrupts		  : interrupt specification for the icn8318 interrupt

 - wake-gpios		  : GPIO specification for the WAKE input

 - touchscreen-size-x	  : horizontal resolution of touchscreen (in pixels)

 - touchscreen-size-y	  : vertical resolution of touchscreen (in pixels)



Optional properties:

 - pinctrl-names	  : should be "default"

 - pinctrl-0:		  : a phandle pointing to the pin settings for the

			    control gpios

 - touchscreen-fuzz-x	  : horizontal noise value of the absolute input

			    device (in pixels)

 - touchscreen-fuzz-y	  : vertical noise value of the absolute input

			    device (in pixels)

 - touchscreen-inverted-x : X axis is inverted (boolean)

 - touchscreen-inverted-y : Y axis is inverted (boolean)

 - touchscreen-swapped-x-y	  : X and Y axis are swapped (boolean)

			    Swapping is done after inverting the axis



Example:



i2c@00000000 {

	/* ... */



	chipone_icn8318@40 {

		compatible = "chipone,icn8318";

		reg = <0x40>;

		interrupt-parent = <&pio>;

		interrupts = <9 IRQ_TYPE_EDGE_FALLING>; /* EINT9 (PG9) */

		pinctrl-names = "default";

		pinctrl-0 = <&ts_wake_pin_p66>;

		wake-gpios = <&pio 1 3 GPIO_ACTIVE_HIGH>; /* PB3 */

		touchscreen-size-x = <800>;

		touchscreen-size-y = <480>;

		touchscreen-inverted-x;

		touchscreen-swapped-x-y;

	};



	/* ... */

};

Documentation/devicetree/bindings/vendor-prefixes.txt

+1 −0
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ capella Capella Microsystems, Inc 
cavium	Cavium, Inc.

cdns	Cadence Design Systems Inc.

chipidea	Chipidea, Inc

chipone		ChipOne

chipspark	ChipSPARK

chrp	Common Hardware Reference Platform

chunghwa	Chunghwa Picture Tubes Ltd.

MAINTAINERS

+7 −0
Original line number Diff line number Diff line
@@ -2523,6 +2523,13 @@ L: linux-usb@vger.kernel.org 
S:	Maintained

F:	drivers/usb/chipidea/



CHIPONE ICN8318 I2C TOUCHSCREEN DRIVER

M:	Hans de Goede <hdegoede@redhat.com>

L:	linux-input@vger.kernel.org

S:	Maintained

F:	Documentation/devicetree/bindings/input/touchscreen/chipone_icn8318.txt

F:	drivers/input/touchscreen/chipone_icn8318.c



CHROME HARDWARE PLATFORM SUPPORT

M:	Olof Johansson <olof@lixom.net>

S:	Maintained

drivers/input/touchscreen/Kconfig

+13 −0
Original line number Diff line number Diff line
@@ -140,6 +140,19 @@ config TOUCHSCREEN_BU21013 
	  To compile this driver as a module, choose M here: the

	  module will be called bu21013_ts.



config TOUCHSCREEN_CHIPONE_ICN8318

	tristate "chipone icn8318 touchscreen controller"

	depends on GPIOLIB

	depends on I2C

	depends on OF

	help

	  Say Y here if you have a ChipOne icn8318 based I2C touchscreen.



	  If unsure, say N.



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

	  module will be called chipone_icn8318.



config TOUCHSCREEN_CY8CTMG110

	tristate "cy8ctmg110 touchscreen"

	depends on I2C

drivers/input/touchscreen/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ obj-$(CONFIG_TOUCHSCREEN_AR1021_I2C) += ar1021_i2c.o 
obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT)	+= atmel_mxt_ts.o

obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR)	+= auo-pixcir-ts.o

obj-$(CONFIG_TOUCHSCREEN_BU21013)	+= bu21013_ts.o

obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8318)	+= chipone_icn8318.o

obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o

obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE)	+= cyttsp_core.o

obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C)	+= cyttsp_i2c.o cyttsp_i2c_common.o