EDT-FT5x06: initial checkin of upstream FT5x06 patch

Signed-off-by: Christian Hemp <c.hemp@phytec.de>

4 files changed, 726 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 3420cdbfcbf6..0ee40cd6312f 100755
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -156,6 +156,11 @@ config TOUCHSCREEN_DYNAPRO
 	  To compile this driver as a module, choose M here: the
 	  module will be called dynapro.
 
+config TOUCHSCREEN_EDT_FT5X06
+	tristate "EDT FocalTech FT5x06 I2C Touchscreen support"
+	help
+	  If unsure, say N.
+
 config TOUCHSCREEN_HAMPSHIRE
 	tristate "Hampshire serial touchscreen"
 	select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 94a71c1fa93d..3cee12e4761d 100755
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_TOUCHSCREEN_BU21013)       += bu21013_ts.o
 obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110)	+= cy8ctmg110_ts.o
 obj-$(CONFIG_TOUCHSCREEN_DA9034)	+= da9034-ts.o
 obj-$(CONFIG_TOUCHSCREEN_DYNAPRO)	+= dynapro.o
+obj-$(CONFIG_TOUCHSCREEN_EDT_FT5X06)	+= edt-ft5x06.o
 obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE)	+= hampshire.o
 obj-$(CONFIG_TOUCHSCREEN_GUNZE)		+= gunze.o
 obj-$(CONFIG_TOUCHSCREEN_EETI)		+= eeti_ts.o
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
new file mode 100644
index 000000000000..c69cec2d607d
--- /dev/null
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -0,0 +1,704 @@
+/* drivers/input/touchscreen/edt-ft5x06.c
+ *
+ * Copyright (C) 2011 Simon Budig, <simon.budig@kernelconcepts.de>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <asm/uaccess.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <linux/gpio.h>
+
+#include "linux/input/edt-ft5x06.h"
+
+#define DRIVER_VERSION "v0.5"
+
+#define WORK_REGISTER_THRESHOLD   0x00
+#define WORK_REGISTER_GAIN        0x30
+#define WORK_REGISTER_OFFSET      0x31
+#define WORK_REGISTER_NUM_X       0x33
+#define WORK_REGISTER_NUM_Y       0x34
+
+#define WORK_REGISTER_OPMODE      0x3c
+#define FACTORY_REGISTER_OPMODE   0x01
+
+static struct i2c_driver edt_ft5x06_i2c_ts_driver;
+
+struct edt_ft5x06_i2c_ts_data
+{
+	struct i2c_client *client;
+	struct input_dev *input;
+	int irq;
+	int irq_pin;
+	int reset_pin;
+	int num_x;
+	int num_y;
+
+	struct mutex mutex;
+	int factory_mode;
+	int threshold;
+	int gain;
+	int offset;
+};
+
+static int edt_ft5x06_ts_readwrite (struct i2c_client *client,
+                                    u16 wr_len, u8 *wr_buf,
+                                    u16 rd_len, u8 *rd_buf)
+{
+	struct i2c_msg wrmsg[2];
+	int i, ret;
+
+	i = 0;
+	if (wr_len) {
+		wrmsg[i].addr  = client->addr;
+		wrmsg[i].flags = 0;
+		wrmsg[i].len = wr_len;
+		wrmsg[i].buf = wr_buf;
+		i++;
+	}
+	if (rd_len) {
+		wrmsg[i].addr  = client->addr;
+		wrmsg[i].flags = I2C_M_RD;
+		wrmsg[i].len = rd_len;
+		wrmsg[i].buf = rd_buf;
+		i++;
+	}
+
+	ret = i2c_transfer (client->adapter, wrmsg, i);
+	if (ret < 0) {
+		dev_info (&client->dev, "i2c_transfer failed: %d\n", ret);
+		return ret;
+	}
+
+	return ret;
+}
+
+
+static irqreturn_t edt_ft5x06_ts_isr (int irq, void *dev_id)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_id;
+	unsigned char touching = 0;
+	unsigned char rdbuf[26], wrbuf[1];
+	int i, have_abs, type, ret;
+
+	memset (wrbuf, 0, sizeof (wrbuf));
+	memset (rdbuf, 0, sizeof (rdbuf));
+
+	wrbuf[0] = 0xf9;
+
+	mutex_lock (&tsdata->mutex);
+	ret = edt_ft5x06_ts_readwrite (tsdata->client,
+	                               1, wrbuf,
+	                               sizeof (rdbuf), rdbuf);
+	mutex_unlock (&tsdata->mutex);
+	if (ret < 0) {
+		dev_err (&tsdata->client->dev, "Unable to write to i2c touchscreen!\n");
+		goto out;
+	}
+
+	if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
+		dev_err (&tsdata->client->dev, "Unexpected header: %02x%02x%02x!\n", rdbuf[0], rdbuf[1], rdbuf[2]);
+	}
+
+	have_abs = 0;
+	touching = rdbuf[3];
+	for (i = 0; i < touching; i++) {
+		type = rdbuf[i*4+5] >> 6;
+		if (type == 0x01 || type == 0x03)  /* ignore Touch Down and Reserved events */
+			continue;
+
+		if (!have_abs) {
+			input_report_key (tsdata->input, BTN_TOUCH,    1);
+			input_report_abs (tsdata->input, ABS_PRESSURE, 1);
+			input_report_abs (tsdata->input, ABS_X, ((rdbuf[i*4+5] << 8) | rdbuf[i*4+6]) & 0x0fff);
+			input_report_abs (tsdata->input, ABS_Y, ((rdbuf[i*4+7] << 8) | rdbuf[i*4+8]) & 0x0fff);
+			have_abs = 1;
+		}
+		input_report_abs (tsdata->input, ABS_MT_POSITION_X, ((rdbuf[i*4+5] << 8) | rdbuf[i*4+6]) & 0x0fff);
+		input_report_abs (tsdata->input, ABS_MT_POSITION_Y, ((rdbuf[i*4+7] << 8) | rdbuf[i*4+8]) & 0x0fff);
+		input_report_abs (tsdata->input, ABS_MT_TRACKING_ID, (rdbuf[i*4+7] >> 4) & 0x0f);
+		input_mt_sync (tsdata->input);
+	}
+	if (!have_abs) {
+		input_report_key (tsdata->input, BTN_TOUCH,    0);
+		input_report_abs (tsdata->input, ABS_PRESSURE, 0);
+	}
+	input_sync (tsdata->input);
+
+out:
+	return IRQ_HANDLED;
+}
+
+
+static int edt_ft5x06_i2c_register_write (struct edt_ft5x06_i2c_ts_data *tsdata,
+                                          u8 addr, u8 value)
+{
+	u8 wrbuf[4];
+	int ret;
+
+	wrbuf[0]  = tsdata->factory_mode ? 0xf3 : 0xfc;
+	wrbuf[1]  = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
+	wrbuf[2]  = value;
+	wrbuf[3]  = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
+
+	disable_irq (tsdata->irq);
+
+	ret = edt_ft5x06_ts_readwrite (tsdata->client,
+	                               4, wrbuf,
+	                               0, NULL);
+
+	enable_irq (tsdata->irq);
+
+	return ret;
+}
+
+static int edt_ft5x06_i2c_register_read (struct edt_ft5x06_i2c_ts_data *tsdata,
+                                         u8 addr)
+{
+	u8 wrbuf[2], rdbuf[2];
+	int ret;
+
+	wrbuf[0]  = tsdata->factory_mode ? 0xf3 : 0xfc;
+	wrbuf[1]  = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
+	wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
+
+	disable_irq (tsdata->irq);
+
+	ret = edt_ft5x06_ts_readwrite (tsdata->client,
+	                               2, wrbuf,
+	                               2, rdbuf);
+
+	enable_irq (tsdata->irq);
+
+#if 0
+	dev_info (&tsdata->client->dev, "wr: %02x %02x -> rd: %02x %02x\n",
+	          wrbuf[0], wrbuf[1], rdbuf[0], rdbuf[1]);
+#endif
+
+	if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1])
+		dev_err (&tsdata->client->dev, "crc error: 0x%02x expected, got 0x%02x\n",
+		         (wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]), rdbuf[1]);
+
+	return ret < 0 ? ret : rdbuf[0];
+}
+
+static ssize_t edt_ft5x06_i2c_setting_show (struct device *dev,
+                                            struct device_attribute *attr,
+                                            char *buf)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (dev);
+	struct i2c_client *client = tsdata->client;
+	int ret = 0;
+	int *value;
+	u8 addr;
+
+	switch (attr->attr.name[0]) {
+		case 't':    /* threshold */
+			addr = WORK_REGISTER_THRESHOLD;
+			value = &tsdata->threshold;
+			break;
+		case 'g':    /* gain */
+			addr = WORK_REGISTER_GAIN;
+			value = &tsdata->gain;
+			break;
+		case 'o':    /* offset */
+			addr = WORK_REGISTER_OFFSET;
+			value = &tsdata->offset;
+			break;
+		default:
+			dev_err (&client->dev, "unknown attribute for edt_ft5x06_i2c_setting_show: %s\n", attr->attr.name);
+			return -EINVAL;
+	}
+
+	mutex_lock (&tsdata->mutex);
+
+	if (tsdata->factory_mode == 1) {
+		dev_err (dev, "setting register not available in factory mode\n");
+		return -EIO;
+	}
+
+	ret = edt_ft5x06_i2c_register_read (tsdata, addr);
+	if (ret < 0) {
+		dev_err (&tsdata->client->dev, "Unable to write to i2c touchscreen!\n");
+		mutex_unlock (&tsdata->mutex);
+		return ret;
+	}
+	mutex_unlock (&tsdata->mutex);
+
+	if (ret != *value) {
+		dev_info (&tsdata->client->dev, "i2c read (%d) and stored value (%d) differ. Huh?\n", ret, *value);
+		*value = ret;
+	}
+
+	return sprintf (buf, "%d\n", ret);
+}
+
+static ssize_t edt_ft5x06_i2c_setting_store (struct device *dev,
+                                             struct device_attribute *attr,
+                                             const char *buf, size_t count)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (dev);
+	struct i2c_client *client = tsdata->client;
+	int ret = 0;
+	u8 addr;
+	unsigned int val;
+
+	mutex_lock (&tsdata->mutex);
+
+	if (tsdata->factory_mode == 1) {
+		dev_err (dev, "setting register not available in factory mode\n");
+		ret = -EIO;
+		goto out;
+	}
+
+	if (sscanf(buf, "%u", &val) != 1) {
+		dev_err (dev, "Invalid value for attribute %s\n", attr->attr.name);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	switch (attr->attr.name[0]) {
+		case 't':    /* threshold */
+			addr = WORK_REGISTER_THRESHOLD;
+			val = val < 20 ? 20 : val > 80 ? 80 : val;
+			tsdata->threshold = val;
+			break;
+		case 'g':    /* gain */
+			addr = WORK_REGISTER_GAIN;
+			val = val < 0 ? 0 : val > 31 ? 31 : val;
+			tsdata->gain = val;
+			break;
+		case 'o':    /* offset */
+			addr = WORK_REGISTER_OFFSET;
+			val = val < 0 ? 0 : val > 31 ? 31 : val;
+			tsdata->offset = val;
+			break;
+		default:
+			dev_err (&client->dev, "unknown attribute for edt_ft5x06_i2c_setting_show: %s\n", attr->attr.name);
+			ret = -EINVAL;
+			goto out;
+	}
+
+	ret = edt_ft5x06_i2c_register_write (tsdata, addr, val);
+
+	if (ret < 0) {
+		dev_err (&tsdata->client->dev, "Unable to write to i2c touchscreen!\n");
+		goto out;
+	}
+
+	mutex_unlock (&tsdata->mutex);
+	return count;
+
+out:
+	mutex_unlock (&tsdata->mutex);
+	return ret;
+}
+
+
+static ssize_t edt_ft5x06_i2c_mode_show (struct device *dev,
+                                         struct device_attribute *attr,
+                                         char *buf)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (dev);
+	return sprintf (buf, "%d\n", tsdata->factory_mode);
+}
+
+static ssize_t edt_ft5x06_i2c_mode_store (struct device *dev,
+                                          struct device_attribute *attr,
+                                          const char *buf, size_t count)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (dev);
+	int i, ret = 0;
+	unsigned int mode;
+
+	if (sscanf(buf, "%u", &mode) != 1 || (mode | 1) != 1) {
+		dev_err (dev, "Invalid value for operation mode\n");
+		return -EINVAL;
+	}
+
+	/* no change, return without doing anything */
+	if (mode == tsdata->factory_mode)
+		return count;
+
+	mutex_lock (&tsdata->mutex);
+	if (tsdata->factory_mode == 0) { /* switch to factory mode */
+		disable_irq (tsdata->irq);
+		/* mode register is 0x3c when in the work mode */
+		ret = edt_ft5x06_i2c_register_write (tsdata, WORK_REGISTER_OPMODE, 0x03);
+		if (ret < 0) {
+			dev_err (dev, "failed to switch to factory mode (%d)\n", ret);
+		} else {
+			tsdata->factory_mode = 1;
+			for (i = 0; i < 10; i++) {
+				mdelay (5);
+				/* mode register is 0x01 when in the factory mode */
+				ret = edt_ft5x06_i2c_register_read (tsdata, FACTORY_REGISTER_OPMODE);
+				if (ret == 0x03)
+					break;
+			}
+			if (i == 10)
+				dev_err (dev, "not in factory mode after %dms.\n", i*5);
+		}
+	} else {  /* switch to work mode */
+		/* mode register is 0x01 when in the factory mode */
+		ret = edt_ft5x06_i2c_register_write (tsdata, FACTORY_REGISTER_OPMODE, 0x01);
+		if (ret < 0) {
+			dev_err (dev, "failed to switch to work mode (%d)\n", ret);
+		} else {
+			tsdata->factory_mode = 0;
+			for (i = 0; i < 10; i++) {
+				mdelay (5);
+				/* mode register is 0x01 when in the factory mode */
+				ret = edt_ft5x06_i2c_register_read (tsdata, WORK_REGISTER_OPMODE);
+				if (ret == 0x01)
+					break;
+			}
+			if (i == 10)
+				dev_err (dev, "not in work mode after %dms.\n", i*5);
+
+			/* restore parameters */
+			edt_ft5x06_i2c_register_write (tsdata, WORK_REGISTER_THRESHOLD, tsdata->threshold);
+			edt_ft5x06_i2c_register_write (tsdata, WORK_REGISTER_GAIN, tsdata->gain);
+			edt_ft5x06_i2c_register_write (tsdata, WORK_REGISTER_OFFSET, tsdata->offset);
+
+			enable_irq (tsdata->irq);
+		}
+	}
+
+	mutex_unlock (&tsdata->mutex);
+	return count;
+}
+
+
+static ssize_t edt_ft5x06_i2c_raw_data_show (struct device *dev,
+                                             struct device_attribute *attr,
+                                             char *buf)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (dev);
+	int i, ret;
+	char *ptr, wrbuf[3];
+
+	if (tsdata->factory_mode == 0) {
+		dev_err (dev, "raw data not available in work mode\n");
+		return -EIO;
+	}
+
+	mutex_lock (&tsdata->mutex);
+	ret = edt_ft5x06_i2c_register_write (tsdata, 0x08, 0x01);
+	for (i = 0; i < 100; i++) {
+		ret = edt_ft5x06_i2c_register_read (tsdata, 0x08);
+		if (ret < 1)
+			break;
+		udelay (1000);
+	}
+
+	if (i == 100 || ret < 0) {
+		dev_err (dev, "waiting time exceeded or error: %d\n", ret);
+		mutex_unlock (&tsdata->mutex);
+		return ret || ETIMEDOUT;
+	}
+
+	ptr = buf;
+	wrbuf[0] = 0xf5;
+	wrbuf[1] = 0x0e;
+	for (i = 0; i <= tsdata->num_x; i++) {
+		wrbuf[2] = i;
+		ret = edt_ft5x06_ts_readwrite (tsdata->client,
+		                               3, wrbuf,
+		                               tsdata->num_y * 2, ptr);
+		if (ret < 0) {
+			mutex_unlock (&tsdata->mutex);
+			return ret;
+		}
+
+		ptr += tsdata->num_y * 2;
+	}
+
+	mutex_unlock (&tsdata->mutex);
+	return ptr - buf;
+}
+
+
+static DEVICE_ATTR(gain,      0664, edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store);
+static DEVICE_ATTR(offset,    0664, edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store);
+static DEVICE_ATTR(threshold, 0664, edt_ft5x06_i2c_setting_show, edt_ft5x06_i2c_setting_store);
+static DEVICE_ATTR(mode,      0664, edt_ft5x06_i2c_mode_show, edt_ft5x06_i2c_mode_store);
+static DEVICE_ATTR(raw_data,  0444, edt_ft5x06_i2c_raw_data_show, NULL);
+
+static struct attribute *edt_ft5x06_i2c_attrs[] = {
+	&dev_attr_gain.attr,
+	&dev_attr_offset.attr,
+	&dev_attr_threshold.attr,
+	&dev_attr_mode.attr,
+	&dev_attr_raw_data.attr,
+	NULL
+};
+
+static const struct attribute_group edt_ft5x06_i2c_attr_group = {
+	.attrs = edt_ft5x06_i2c_attrs,
+};
+
+static int edt_ft5x06_i2c_ts_probe (struct i2c_client *client,
+                                    const struct i2c_device_id *id)
+{
+
+	struct edt_ft5x06_i2c_ts_data *tsdata;
+	struct input_dev *input;
+	int error;
+	u8 rdbuf[23];
+	char *model_name = NULL;
+	char *fw_version = NULL;
+
+	dev_info (&client->dev, "probing for EDT FT5x06 I2C\n");
+
+	if (!client->irq) {
+		dev_dbg (&client->dev, "no IRQ?\n");
+		return -ENODEV;
+	}
+
+	if (!client->dev.platform_data) {
+		dev_dbg (&client->dev, "no reset pin in platform data?\n");
+		return -ENODEV;
+	}
+
+	tsdata = kzalloc (sizeof (*tsdata), GFP_KERNEL);
+	if (!tsdata) {
+		dev_err (&client->dev, "failed to allocate driver data!\n");
+		dev_set_drvdata (&client->dev, NULL);
+		return -ENOMEM;
+	}
+
+	dev_set_drvdata (&client->dev, tsdata);
+	tsdata->client = client;
+
+	tsdata->reset_pin = ((struct edt_ft5x06_platform_data *) client->dev.platform_data)->reset_pin;
+	mutex_init (&tsdata->mutex);
+
+	error = gpio_request (tsdata->reset_pin, NULL);
+	if (error < 0) {
+		dev_err (&client->dev,
+		         "Failed to request GPIO %d as reset pin, error %d\n",
+		         tsdata->reset_pin, error);
+		error = -ENOMEM;
+		goto err_free_tsdata;
+	}
+
+	/* this pulls reset down, enabling the low active reset */
+	if (gpio_direction_output (tsdata->reset_pin, 0) < 0) {
+		dev_info (&client->dev, "switching to output failed\n");
+		error = -ENOMEM;
+		goto err_free_reset_pin;
+	}
+
+	/* request IRQ pin */
+	tsdata->irq = client->irq;
+	tsdata->irq_pin = irq_to_gpio (tsdata->irq);
+
+	error = gpio_request (tsdata->irq_pin, NULL);
+	if (error < 0) {
+		dev_err (&client->dev,
+		         "Failed to request GPIO %d for IRQ %d, error %d\n",
+		         tsdata->irq_pin, tsdata->irq, error);
+		error = -ENOMEM;
+		goto err_free_reset_pin;
+	}
+	gpio_direction_input (tsdata->irq_pin);
+
+	/* release reset */
+	mdelay (50);
+	gpio_set_value (tsdata->reset_pin, 1);
+	mdelay (100);
+
+	mutex_lock (&tsdata->mutex);
+
+	tsdata->factory_mode = 0;
+
+	if (edt_ft5x06_ts_readwrite (client, 1, "\xbb", 22, rdbuf) < 0) {
+		dev_err (&client->dev, "probing failed\n");
+		error = -ENODEV;
+		goto err_free_irq_pin;
+	}
+
+	rdbuf[22] = '\0';
+	if (rdbuf[21] == '$')
+		rdbuf[21] = '\0';
+
+	model_name = rdbuf + 1;
+	fw_version = rdbuf;
+	/* look for Model/Version separator */
+	while (fw_version[0] != '\0' && fw_version[0] != '*')
+		fw_version++;
+
+	tsdata->threshold = edt_ft5x06_i2c_register_read (tsdata, WORK_REGISTER_THRESHOLD);
+	tsdata->gain      = edt_ft5x06_i2c_register_read (tsdata, WORK_REGISTER_GAIN);
+	tsdata->offset    = edt_ft5x06_i2c_register_read (tsdata, WORK_REGISTER_OFFSET);
+	tsdata->num_x     = edt_ft5x06_i2c_register_read (tsdata, WORK_REGISTER_NUM_X);
+	tsdata->num_y     = edt_ft5x06_i2c_register_read (tsdata, WORK_REGISTER_NUM_Y);
+
+	mutex_unlock (&tsdata->mutex);
+
+	if (fw_version[0] == '*') {
+		fw_version[0] = '\0';
+		fw_version++;
+		dev_info (&client->dev, "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
+		          model_name, fw_version, tsdata->num_x, tsdata->num_y);
+	} else {
+		dev_info (&client->dev, "Product ID \"%s\"\n", rdbuf + 1);
+	}
+
+	input = input_allocate_device ();
+	if (!input) {
+		dev_err (&client->dev, "failed to allocate input device!\n");
+		error = -ENOMEM;
+		goto err_free_irq_pin;
+	}
+
+	set_bit (EV_SYN, input->evbit);
+	set_bit (EV_KEY, input->evbit);
+	set_bit (EV_ABS, input->evbit);
+	set_bit (BTN_TOUCH, input->keybit);
+	input_set_abs_params (input, ABS_X, 0, tsdata->num_x * 64 - 1, 0, 0);
+	input_set_abs_params (input, ABS_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
+	input_set_abs_params (input, ABS_PRESSURE, 0, 1, 0, 0);
+	input_set_abs_params (input, ABS_MT_POSITION_X, 0, tsdata->num_x * 64 - 1, 0, 0);
+	input_set_abs_params (input, ABS_MT_POSITION_Y, 0, tsdata->num_y * 64 - 1, 0, 0);
+	input_set_abs_params (input, ABS_MT_TRACKING_ID, 0, 15, 0, 0);
+
+	input->name = kstrdup (model_name, GFP_NOIO);
+	input->id.bustype = BUS_I2C;
+	input->dev.parent = &client->dev;
+
+	input_set_drvdata (input, tsdata);
+
+	tsdata->input = input;
+
+	if ((error = input_register_device (input)))
+		goto err_free_input_device;
+
+	if (request_threaded_irq (tsdata->irq, NULL, edt_ft5x06_ts_isr,
+	                          IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+	                          client->name, tsdata)) {
+		dev_err (&client->dev, "Unable to request touchscreen IRQ.\n");
+		input = NULL;
+		error = -ENOMEM;
+		goto err_unregister_device;
+	}
+
+	error = sysfs_create_group (&client->dev.kobj, &edt_ft5x06_i2c_attr_group);
+	if (error)
+		goto err_free_irq;
+
+	device_init_wakeup (&client->dev, 1);
+
+	dev_info (&tsdata->client->dev,
+	          "EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n",
+	          tsdata->irq_pin, tsdata->reset_pin);
+
+	return 0;
+
+err_free_irq:
+	free_irq (client->irq, tsdata);
+err_unregister_device:
+	input_unregister_device (input);
+err_free_input_device:
+	kfree (input->name);
+	input_free_device (input);
+err_free_irq_pin:
+	gpio_free (tsdata->irq_pin);
+err_free_reset_pin:
+	gpio_free (tsdata->reset_pin);
+err_free_tsdata:
+	kfree (tsdata);
+	return error;
+}
+
+static int edt_ft5x06_i2c_ts_remove (struct i2c_client *client)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (&client->dev);
+
+	sysfs_remove_group (&client->dev.kobj, &edt_ft5x06_i2c_attr_group);
+
+	free_irq (client->irq, tsdata);
+	input_unregister_device (tsdata->input);
+	kfree (tsdata->input->name);
+	input_free_device (tsdata->input);
+	gpio_free (tsdata->irq_pin);
+	gpio_free (tsdata->reset_pin);
+	kfree (tsdata);
+
+	dev_set_drvdata (&client->dev, NULL);
+	return 0;
+}
+
+static int edt_ft5x06_i2c_ts_suspend (struct i2c_client *client, pm_message_t mesg)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (&client->dev);
+
+	if (device_may_wakeup (&client->dev))
+		enable_irq_wake (tsdata->irq);
+
+	return 0;
+}
+
+static int edt_ft5x06_i2c_ts_resume (struct i2c_client *client)
+{
+	struct edt_ft5x06_i2c_ts_data *tsdata = dev_get_drvdata (&client->dev);
+
+	if (device_may_wakeup (&client->dev))
+		disable_irq_wake (tsdata->irq);
+
+	return 0;
+}
+
+static const struct i2c_device_id edt_ft5x06_i2c_ts_id[] =
+{
+	{ "edt-ft5x06", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE (i2c, edt_ft5x06_i2c_ts_id);
+
+static struct i2c_driver edt_ft5x06_i2c_ts_driver =
+{
+	.driver = {
+		.owner = THIS_MODULE,
+		.name = "edt_ft5x06_i2c",
+	},
+	.id_table = edt_ft5x06_i2c_ts_id,
+	.probe    = edt_ft5x06_i2c_ts_probe,
+	.remove   = edt_ft5x06_i2c_ts_remove,
+	.suspend  = edt_ft5x06_i2c_ts_suspend,
+	.resume   = edt_ft5x06_i2c_ts_resume,
+};
+
+static int __init edt_ft5x06_i2c_ts_init (void)
+{
+	return i2c_add_driver (&edt_ft5x06_i2c_ts_driver);
+}
+module_init (edt_ft5x06_i2c_ts_init);
+
+static void __exit edt_ft5x06_i2c_ts_exit (void)
+{
+	i2c_del_driver (&edt_ft5x06_i2c_ts_driver);
+}
+module_exit (edt_ft5x06_i2c_ts_exit);
+
+MODULE_AUTHOR ("Simon Budig <simon.budig@kernelconcepts.de>");
+MODULE_DESCRIPTION ("EDT FT5x06 I2C Touchscreen Driver");
+MODULE_LICENSE (GPL);
diff --git a/include/linux/input/edt-ft5x06.h b/include/linux/input/edt-ft5x06.h
new file mode 100644
index 000000000000..d7fd990a5978
--- /dev/null
+++ b/include/linux/input/edt-ft5x06.h
@@ -0,0 +1,16 @@
+#ifndef _EDT_FT5X06_H
+#define _EDT_FT5X06_H
+
+/*
+ * Copyright (c) 2011 Simon Budig, <simon.budig@kernelconcepts.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+struct edt_ft5x06_platform_data {
+	unsigned int reset_pin;
+};
+
+#endif /* _EDT_FT5X06_H */