Commit 771d8f1b authored by Aleksei Mamlin's avatar Aleksei Mamlin Committed by Dmitry Torokhov
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Input: goodix - add device tree support 

This change adds device tree support and binding information for Goodix
GT9xx series touchscreen controller.  It also adds support for 5-finger
chips, like GT911 and GT912, which can be found on ARM tablets, such as
Wexler TAB7200 and MSI Primo73.

Datasheets can be found here:
https://drive.google.com/folderview?id=0BxCVOQS3ZymGfmJyY2RKbE5XbVlKNlktVTlwV0lxNEdxd2dzeWZER094cmJPVnMxN1F0Yzg&usp=sharing



Signed-off-by: default avatarAleksei Mamlin <mamlinav@gmail.com>
Reviewed-by: default avatarBastien Nocera <hadess@hadess.net>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent a7ac7c95

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

0 → 100644
+29 −0
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Device tree bindings for Goodix GT9xx series touchscreen controller



Required properties:



 - compatible		: Should be "goodix,gt911"

				 or "goodix,gt9110"

				 or "goodix,gt912"

				 or "goodix,gt927"

				 or "goodix,gt9271"

				 or "goodix,gt928"

				 or "goodix,gt967"

 - reg			: I2C address of the chip. Should be 0x5d or 0x14

 - interrupt-parent	: Interrupt controller to which the chip is connected

 - interrupts		: Interrupt to which the chip is connected



Example:



	i2c@00000000 {

		/* ... */



		gt928@5d {

			compatible = "goodix,gt928";

			reg = <0x5d>;

			interrupt-parent = <&gpio>;

			interrupts = <0 0>;

		};



		/* ... */

	};

Documentation/devicetree/bindings/vendor-prefixes.txt

+1 −0
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@@ -65,6 +65,7 @@ gef GE Fanuc Intelligent Platforms Embedded Systems, Inc. 
geniatech	Geniatech, Inc.

globalscale	Globalscale Technologies, Inc.

gmt	Global Mixed-mode Technology, Inc.

goodix	Shenzhen Huiding Technology Co., Ltd.

google	Google, Inc.

gumstix	Gumstix, Inc.

gw	Gateworks Corporation

drivers/input/touchscreen/Kconfig

+3 −2
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@@ -297,11 +297,12 @@ config TOUCHSCREEN_FUJITSU 


config TOUCHSCREEN_GOODIX

	tristate "Goodix I2C touchscreen"

	depends on I2C && ACPI

	depends on I2C

	help

	  Say Y here if you have the Goodix touchscreen (such as one

	  installed in Onda v975w tablets) connected to your

	  system.

	  system. It also supports 5-finger chip models, which can be

	  found on ARM tablets, like Wexler TAB7200 and MSI Primo73.



	  If unsure, say N.

drivers/input/touchscreen/goodix.c

+20 −1
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@@ -23,6 +23,8 @@ 
#include <linux/irq.h>

#include <linux/interrupt.h>

#include <linux/slab.h>

#include <linux/acpi.h>

#include <linux/of.h>

#include <asm/unaligned.h>



struct goodix_ts_data {
@@ -375,11 +377,27 @@ static const struct i2c_device_id goodix_ts_id[] = { 
	{ }

};



#ifdef CONFIG_ACPI

static const struct acpi_device_id goodix_acpi_match[] = {

	{ "GDIX1001", 0 },

	{ }

};

MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);

#endif



#ifdef CONFIG_OF

static const struct of_device_id goodix_of_match[] = {

	{ .compatible = "goodix,gt911" },

	{ .compatible = "goodix,gt9110" },

	{ .compatible = "goodix,gt912" },

	{ .compatible = "goodix,gt927" },

	{ .compatible = "goodix,gt9271" },

	{ .compatible = "goodix,gt928" },

	{ .compatible = "goodix,gt967" },

	{ }

};

MODULE_DEVICE_TABLE(of, goodix_of_match);

#endif



static struct i2c_driver goodix_ts_driver = {

	.probe = goodix_ts_probe,
@@ -387,7 +405,8 @@ static struct i2c_driver goodix_ts_driver = { 
	.driver = {

		.name = "Goodix-TS",

		.owner = THIS_MODULE,

		.acpi_match_table = goodix_acpi_match,

		.acpi_match_table = ACPI_PTR(goodix_acpi_match),

		.of_match_table = of_match_ptr(goodix_of_match),

	},

};

module_i2c_driver(goodix_ts_driver);