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Input: goodix - add device tree support

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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: Aleksei Mamlin <mamlinav@gmail.com>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Aleksei Mamlin 2015-03-06 16:43:38 -08:00 committed by Dmitry Torokhov
parent a7ac7c95d4
commit 771d8f1b17
4 changed files with 53 additions and 3 deletions
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29
Documentation/devicetree/bindings/input/touchscreen/goodix.txt Normal file
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@ -0,0 +1,29 @@
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>;
};
/* ... */
};

1
Documentation/devicetree/bindings/vendor-prefixes.txt
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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

5
drivers/input/touchscreen/Kconfig
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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.

21
drivers/input/touchscreen/goodix.c
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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);