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Commit e8a48fda authored by chenx's avatar chenx Committed by Mohan Pallaka
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input: touchpanel: Add ST Touchscreen version 4.1.0 driver 



This is the reference driver source code for ST
Touchscreen of version 4.1.0. It is used for QVR8998
touchscreen.

Signed-off-by: default avatarchenx <chenxiang0527@thundersoft.com>
Git-commit: 2cd09314337d614e69d0ebd99afb71d99d31b69a
Git-repo: https://source.codeaurora.org/quic/la/kernel/msm-3.10


CRs-Fixed: 1106217
Change-Id: I6674245402c0a5d6cca6bf82a9f8b1bf4f4f4ef3
Signed-off-by: default avatarJin Fu <jinf@codeaurora.org>
parent 1252d8e6

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

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STMicroelectronics touch controller



The STMicroelectronics controller is connected to host processor

via i2c. The controller generates interrupts when the

user touches the panel. The host controller is expected

to read the touch coordinates over i2c and pass the coordinates

to the rest of the system.



Required properties:



 - compatible		: should be "st,fts".

 - reg			: i2c slave address of the device.

 - interrupt-parent	: parent of interrupt.

 - interrupts		: touch sample interrupt to indicate presense or release

				of fingers on the panel.

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

 - vcc-supply		: Power source required to power up i2c bus.

 - st,irq-gpio		: irq gpio which is to provide interrupts to host,

				same as "interrupts" node. It will also

				contain active low or active high information.

 - st,reset-gpio	: reset gpio to control the reset of chip.

 - pinctrl-names	: This should be defined if a target uses pinctrl framework.

			See "pinctrl" in Documentation/devicetree/bindings/pinctrl/msm-pinctrl.txt.

			Specify the names of the configs that pinctrl can install in driver.

			Following are the pinctrl configs that can be installed:

			"pmx_ts_active" : Active configuration of pins, this should specify active

			config defined in pin groups of interrupt and reset gpio.

			"pmx_ts_suspend" : Disabled configuration of pins, this should specify sleep

			config defined in pin groups of interrupt and reset gpio.

			"pmx_ts_release" : Release configuration of pins, this should specify

			release config defined in pin groups of interrupt and reset gpio.

 - st,regulator_avdd	: name of Power supply needed to power up the device.

 - st,regulator_dvdd	: name of Power source required to power up i2c bus.

Optional properties:





Example:

	i2c@78b9000 { /* BLSP1 QUP5 */

		st_fts@49 {

			compatible = "st,fts";

			reg = <0x49>;

			interrupt-parent = <&msm_gpio>;

			interrupts = <13 0x2008>;

			vdd-supply = <&pm8916_l17>;

			vcc-supply = <&pm8916_l6>;

			pinctrl-names = "pmx_ts_active","pmx_ts_suspend";

			pinctrl-0 = <&ts_int_active &ts_reset_active>;

			pinctrl-1 = <&ts_int_suspend &ts_reset_suspend>;

			st,irq-gpio = <&msm_gpio 13 0x00000001>;

			st,reset-gpio = <&msm_gpio 12 0x0>;

			st,regulator_dvdd = "vdd";

			st,regulator_avdd = "avdd";

		};

	};

drivers/input/touchscreen/Kconfig

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@@ -1246,4 +1246,14 @@ config TOUCHSCREEN_ROHM_BU21023 
	  To compile this driver as a module, choose M here: the

	  module will be called bu21023_ts.



config TOUCHSCREEN_ST

	bool "STMicroelectronics Touchscreen Driver"

	depends on I2C

	help

	  Say Y here if you have a STMicroelectronics Touchscreen.



	  If unsure, say N.



source "drivers/input/touchscreen/st/Kconfig"



endif

drivers/input/touchscreen/Makefile

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@@ -104,3 +104,4 @@ obj-$(CONFIG_TOUCHSCREEN_ZET6223) += zet6223.o 
obj-$(CONFIG_TOUCHSCREEN_ZFORCE)	+= zforce_ts.o

obj-$(CONFIG_TOUCHSCREEN_COLIBRI_VF50)	+= colibri-vf50-ts.o

obj-$(CONFIG_TOUCHSCREEN_ROHM_BU21023)	+= rohm_bu21023.o

obj-$(CONFIG_TOUCHSCREEN_ST)		+= st/

drivers/input/touchscreen/st/Kconfig

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#

# STMicroelectronics touchscreen driver configuration

#



config TOUCHSCREEN_ST_I2C

	tristate "STMicroelectronics i2c touchscreen"

	depends on TOUCHSCREEN_ST

	help

	  This enables support for ST touch panel over I2C based touchscreens.

drivers/input/touchscreen/st/Makefile

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#

## Makefile for the STMicroelectronics touchscreen driver.

#



obj-$(CONFIG_TOUCHSCREEN_ST_I2C) += fts.o fts_gui.o fts_driver_test.o fts_lib/