1 files changed, 399 insertions, 120 deletions

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index 412a85e..f8815be 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -1,5 +1,7 @@
 /*
  * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
+ * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
+ * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
@@ -33,6 +35,7 @@
 #include <linux/debugfs.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
+#include <linux/of_gpio.h>
 #include <linux/input/mt.h>
 #include <linux/input/edt-ft5x06.h>
 
@@ -45,6 +48,14 @@
 #define WORK_REGISTER_NUM_X		0x33
 #define WORK_REGISTER_NUM_Y		0x34
 
+#define M09_REGISTER_THRESHOLD		0x80
+#define M09_REGISTER_GAIN		0x92
+#define M09_REGISTER_OFFSET		0x93
+#define M09_REGISTER_NUM_X		0x94
+#define M09_REGISTER_NUM_Y		0x95
+
+#define NO_REGISTER			0xff
+
 #define WORK_REGISTER_OPMODE		0x3c
 #define FACTORY_REGISTER_OPMODE		0x01
 
@@ -59,12 +70,30 @@
 #define EDT_RAW_DATA_RETRIES		100
 #define EDT_RAW_DATA_DELAY		1 /* msec */
 
+enum edt_ver {
+	M06,
+	M09,
+};
+
+struct edt_reg_addr {
+	int reg_threshold;
+	int reg_report_rate;
+	int reg_gain;
+	int reg_offset;
+	int reg_num_x;
+	int reg_num_y;
+};
+
 struct edt_ft5x06_ts_data {
 	struct i2c_client *client;
 	struct input_dev *input;
 	u16 num_x;
 	u16 num_y;
 
+	int reset_pin;
+	int irq_pin;
+	int wake_pin;
+
 #if defined(CONFIG_DEBUG_FS)
 	struct dentry *debug_dir;
 	u8 *raw_buffer;
@@ -79,6 +108,9 @@ struct edt_ft5x06_ts_data {
 	int report_rate;
 
 	char name[EDT_NAME_LEN];
+
+	struct edt_reg_addr reg_addr;
+	enum edt_ver version;
 };
 
 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
@@ -136,33 +168,58 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
 {
 	struct edt_ft5x06_ts_data *tsdata = dev_id;
 	struct device *dev = &tsdata->client->dev;
-	u8 cmd = 0xf9;
-	u8 rdbuf[26];
+	u8 cmd;
+	u8 rdbuf[29];
 	int i, type, x, y, id;
+	int offset, tplen, datalen;
 	int error;
 
+	switch (tsdata->version) {
+	case M06:
+		cmd = 0xf9; /* tell the controller to send touch data */
+		offset = 5; /* where the actual touch data starts */
+		tplen = 4;  /* data comes in so called frames */
+		datalen = 26; /* how much bytes to listen for */
+		break;
+
+	case M09:
+		cmd = 0x02;
+		offset = 1;
+		tplen = 6;
+		datalen = 29;
+		break;
+
+	default:
+		goto out;
+	}
+
 	memset(rdbuf, 0, sizeof(rdbuf));
 
 	error = edt_ft5x06_ts_readwrite(tsdata->client,
 					sizeof(cmd), &cmd,
-					sizeof(rdbuf), rdbuf);
+					datalen, rdbuf);
 	if (error) {
 		dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
 				    error);
 		goto out;
 	}
 
-	if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa || rdbuf[2] != 26) {
-		dev_err_ratelimited(dev, "Unexpected header: %02x%02x%02x!\n",
-				    rdbuf[0], rdbuf[1], rdbuf[2]);
-		goto out;
-	}
+	/* M09 does not send header or CRC */
+	if (tsdata->version == M06) {
+		if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
+			rdbuf[2] != datalen) {
+			dev_err_ratelimited(dev,
+					"Unexpected header: %02x%02x%02x!\n",
+					rdbuf[0], rdbuf[1], rdbuf[2]);
+			goto out;
+		}
 
-	if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, 26))
-		goto out;
+		if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
+			goto out;
+	}
 
 	for (i = 0; i < MAX_SUPPORT_POINTS; i++) {
-		u8 *buf = &rdbuf[i * 4 + 5];
+		u8 *buf = &rdbuf[i * tplen + offset];
 		bool down;
 
 		type = buf[0] >> 6;
@@ -170,10 +227,14 @@ static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
 		if (type == TOUCH_EVENT_RESERVED)
 			continue;
 
+		/* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
+		if (tsdata->version == M06 && type == TOUCH_EVENT_DOWN)
+			continue;
+
 		x = ((buf[0] << 8) | buf[1]) & 0x0fff;
 		y = ((buf[2] << 8) | buf[3]) & 0x0fff;
 		id = (buf[2] >> 4) & 0x0f;
-		down = (type != TOUCH_EVENT_UP);
+		down = type != TOUCH_EVENT_UP;
 
 		input_mt_slot(tsdata->input, id);
 		input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER, down);
@@ -197,12 +258,25 @@ static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
 {
 	u8 wrbuf[4];
 
-	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];
-
-	return edt_ft5x06_ts_readwrite(tsdata->client, 4, wrbuf, 0, NULL);
+	switch (tsdata->version) {
+	case M06:
+		wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
+		wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
+		wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
+		wrbuf[2] = value;
+		wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
+		return edt_ft5x06_ts_readwrite(tsdata->client, 4,
+					wrbuf, 0, NULL);
+	case M09:
+		wrbuf[0] = addr;
+		wrbuf[1] = value;
+
+		return edt_ft5x06_ts_readwrite(tsdata->client, 3,
+					wrbuf, 0, NULL);
+
+	default:
+		return -EINVAL;
+	}
 }
 
 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
@@ -211,19 +285,36 @@ static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
 	u8 wrbuf[2], rdbuf[2];
 	int error;
 
-	wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
-	wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
-	wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
+	switch (tsdata->version) {
+	case M06:
+		wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
+		wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
+		wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
 
-	error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2, rdbuf);
-	if (error)
-		return error;
+		error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
+						rdbuf);
+		if (error)
+			return error;
 
-	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 -EIO;
+		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 -EIO;
+		}
+		break;
+
+	case M09:
+		wrbuf[0] = addr;
+		error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
+						wrbuf, 1, rdbuf);
+		if (error)
+			return error;
+		break;
+
+	default:
+		return -EINVAL;
 	}
 
 	return rdbuf[0];
@@ -234,19 +325,21 @@ struct edt_ft5x06_attribute {
 	size_t field_offset;
 	u8 limit_low;
 	u8 limit_high;
-	u8 addr;
+	u8 addr_m06;
+	u8 addr_m09;
 };
 
-#define EDT_ATTR(_field, _mode, _addr, _limit_low, _limit_high)		\
+#define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09,			\
+		_limit_low, _limit_high)				\
 	struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = {	\
 		.dattr = __ATTR(_field, _mode,				\
 				edt_ft5x06_setting_show,		\
 				edt_ft5x06_setting_store),		\
-		.field_offset =						\
-			offsetof(struct edt_ft5x06_ts_data, _field),	\
+		.field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
+		.addr_m06 = _addr_m06,					\
+		.addr_m09 = _addr_m09,					\
 		.limit_low = _limit_low,				\
 		.limit_high = _limit_high,				\
-		.addr = _addr,						\
 	}
 
 static ssize_t edt_ft5x06_setting_show(struct device *dev,
@@ -257,10 +350,11 @@ static ssize_t edt_ft5x06_setting_show(struct device *dev,
 	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
 	struct edt_ft5x06_attribute *attr =
 			container_of(dattr, struct edt_ft5x06_attribute, dattr);
-	u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
+	u8 *field = (u8 *)tsdata + attr->field_offset;
 	int val;
 	size_t count = 0;
 	int error = 0;
+	u8 addr;
 
 	mutex_lock(&tsdata->mutex);
 
@@ -269,15 +363,33 @@ static ssize_t edt_ft5x06_setting_show(struct device *dev,
 		goto out;
 	}
 
-	val = edt_ft5x06_register_read(tsdata, attr->addr);
-	if (val < 0) {
-		error = val;
-		dev_err(&tsdata->client->dev,
-			"Failed to fetch attribute %s, error %d\n",
-			dattr->attr.name, error);
+	switch (tsdata->version) {
+	case M06:
+		addr = attr->addr_m06;
+		break;
+
+	case M09:
+		addr = attr->addr_m09;
+		break;
+
+	default:
+		error = -ENODEV;
 		goto out;
 	}
 
+	if (addr != NO_REGISTER) {
+		val = edt_ft5x06_register_read(tsdata, addr);
+		if (val < 0) {
+			error = val;
+			dev_err(&tsdata->client->dev,
+				"Failed to fetch attribute %s, error %d\n",
+				dattr->attr.name, error);
+			goto out;
+		}
+	} else {
+		val = *field;
+	}
+
 	if (val != *field) {
 		dev_warn(&tsdata->client->dev,
 			 "%s: read (%d) and stored value (%d) differ\n",
@@ -299,9 +411,10 @@ static ssize_t edt_ft5x06_setting_store(struct device *dev,
 	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
 	struct edt_ft5x06_attribute *attr =
 			container_of(dattr, struct edt_ft5x06_attribute, dattr);
-	u8 *field = (u8 *)((char *)tsdata + attr->field_offset);
+	u8 *field = (u8 *)tsdata + attr->field_offset;
 	unsigned int val;
 	int error;
+	u8 addr;
 
 	mutex_lock(&tsdata->mutex);
 
@@ -319,14 +432,29 @@ static ssize_t edt_ft5x06_setting_store(struct device *dev,
 		goto out;
 	}
 
-	error = edt_ft5x06_register_write(tsdata, attr->addr, val);
-	if (error) {
-		dev_err(&tsdata->client->dev,
-			"Failed to update attribute %s, error: %d\n",
-			dattr->attr.name, error);
+	switch (tsdata->version) {
+	case M06:
+		addr = attr->addr_m06;
+		break;
+
+	case M09:
+		addr = attr->addr_m09;
+		break;
+
+	default:
+		error = -ENODEV;
 		goto out;
 	}
 
+	if (addr != NO_REGISTER) {
+		error = edt_ft5x06_register_write(tsdata, addr, val);
+		if (error) {
+			dev_err(&tsdata->client->dev,
+				"Failed to update attribute %s, error: %d\n",
+				dattr->attr.name, error);
+			goto out;
+		}
+	}
 	*field = val;
 
 out:
@@ -334,12 +462,14 @@ out:
 	return error ?: count;
 }
 
-static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN, 0, 31);
-static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET, 0, 31);
-static EDT_ATTR(threshold, S_IWUSR | S_IRUGO,
-		WORK_REGISTER_THRESHOLD, 20, 80);
-static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO,
-		WORK_REGISTER_REPORT_RATE, 3, 14);
+static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
+		M09_REGISTER_GAIN, 0, 31);
+static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
+		M09_REGISTER_OFFSET, 0, 31);
+static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
+		M09_REGISTER_THRESHOLD, 20, 80);
+static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
+		NO_REGISTER, 3, 14);
 
 static struct attribute *edt_ft5x06_attrs[] = {
 	&edt_ft5x06_attr_gain.dattr.attr,
@@ -374,6 +504,9 @@ static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
 	}
 
 	/* mode register is 0x3c when in the work mode */
+	if (tsdata->version == M09)
+		goto m09_out;
+
 	error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
 	if (error) {
 		dev_err(&client->dev,
@@ -406,12 +539,18 @@ err_out:
 	enable_irq(client->irq);
 
 	return error;
+
+m09_out:
+	dev_err(&client->dev, "No factory mode support for M09\n");
+	return -EINVAL;
+
 }
 
 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
 {
 	struct i2c_client *client = tsdata->client;
 	int retries = EDT_SWITCH_MODE_RETRIES;
+	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
 	int ret;
 	int error;
 
@@ -444,13 +583,14 @@ static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
 	tsdata->raw_buffer = NULL;
 
 	/* restore parameters */
-	edt_ft5x06_register_write(tsdata, WORK_REGISTER_THRESHOLD,
+	edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
 				  tsdata->threshold);
-	edt_ft5x06_register_write(tsdata, WORK_REGISTER_GAIN,
+	edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
 				  tsdata->gain);
-	edt_ft5x06_register_write(tsdata, WORK_REGISTER_OFFSET,
+	edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
 				  tsdata->offset);
-	edt_ft5x06_register_write(tsdata, WORK_REGISTER_REPORT_RATE,
+	if (reg_addr->reg_report_rate)
+		edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
 				  tsdata->report_rate);
 
 	enable_irq(client->irq);
@@ -479,7 +619,7 @@ static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
 
 	if (mode != tsdata->factory_mode) {
 		retval = mode ? edt_ft5x06_factory_mode(tsdata) :
-			        edt_ft5x06_work_mode(tsdata);
+				edt_ft5x06_work_mode(tsdata);
 	}
 
 	mutex_unlock(&tsdata->mutex);
@@ -568,7 +708,6 @@ out:
 	return error ?: read;
 };
 
-
 static const struct file_operations debugfs_raw_data_fops = {
 	.open = simple_open,
 	.read = edt_ft5x06_debugfs_raw_data_read,
@@ -614,58 +753,100 @@ edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
 
 #endif /* CONFIG_DEBUGFS */
 
-
-
 static int edt_ft5x06_ts_reset(struct i2c_client *client,
-					 int reset_pin)
+			struct edt_ft5x06_ts_data *tsdata)
 {
 	int error;
 
-	if (gpio_is_valid(reset_pin)) {
+	if (gpio_is_valid(tsdata->wake_pin)) {
+		error = devm_gpio_request_one(&client->dev,
+					tsdata->wake_pin, GPIOF_OUT_INIT_LOW,
+					"edt-ft5x06 wake");
+		if (error) {
+			dev_err(&client->dev,
+				"Failed to request GPIO %d as wake pin, error %d\n",
+				tsdata->wake_pin, error);
+			return error;
+		}
+
+		msleep(5);
+		gpio_set_value(tsdata->wake_pin, 1);
+	}
+	if (gpio_is_valid(tsdata->reset_pin)) {
 		/* this pulls reset down, enabling the low active reset */
-		error = devm_gpio_request_one(&client->dev, reset_pin,
-					      GPIOF_OUT_INIT_LOW,
-					      "edt-ft5x06 reset");
+		error = devm_gpio_request_one(&client->dev,
+					tsdata->reset_pin, GPIOF_OUT_INIT_LOW,
+					"edt-ft5x06 reset");
 		if (error) {
 			dev_err(&client->dev,
 				"Failed to request GPIO %d as reset pin, error %d\n",
-				reset_pin, error);
+				tsdata->reset_pin, error);
 			return error;
 		}
 
-		mdelay(50);
-		gpio_set_value(reset_pin, 1);
-		mdelay(100);
+		msleep(5);
+		gpio_set_value(tsdata->reset_pin, 1);
+		msleep(300);
 	}
 
 	return 0;
 }
 
 static int edt_ft5x06_ts_identify(struct i2c_client *client,
-					    char *model_name,
-					    char *fw_version)
+					struct edt_ft5x06_ts_data *tsdata,
+					char *fw_version)
 {
 	u8 rdbuf[EDT_NAME_LEN];
 	char *p;
 	int error;
+	char *model_name = tsdata->name;
 
+	/* see what we find if we assume it is a M06 *
+	 * if we get less than EDT_NAME_LEN, we don't want
+	 * to have garbage in there
+	 */
+	memset(rdbuf, 0, sizeof(rdbuf));
 	error = edt_ft5x06_ts_readwrite(client, 1, "\xbb",
 					EDT_NAME_LEN - 1, rdbuf);
 	if (error)
 		return error;
 
-	/* remove last '$' end marker */
-	rdbuf[EDT_NAME_LEN - 1] = '\0';
-	if (rdbuf[EDT_NAME_LEN - 2] == '$')
-		rdbuf[EDT_NAME_LEN - 2] = '\0';
+	/* if we find something consistent, stay with that assumption
+	 * at least M09 won't send 3 bytes here
+	 */
+	if (!(strnicmp(rdbuf + 1, "EP0", 3))) {
+		tsdata->version = M06;
+
+		/* remove last '$' end marker */
+		rdbuf[EDT_NAME_LEN - 1] = '\0';
+		if (rdbuf[EDT_NAME_LEN - 2] == '$')
+			rdbuf[EDT_NAME_LEN - 2] = '\0';
+
+		/* look for Model/Version separator */
+		p = strchr(rdbuf, '*');
+		if (p)
+			*p++ = '\0';
+		strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
+		strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
+	} else {
+		/* since there are only two versions around (M06, M09) */
+		tsdata->version = M09;
+
+		error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
+						2, rdbuf);
+		if (error)
+			return error;
+
+		strlcpy(fw_version, rdbuf, 2);
 
-	/* look for Model/Version separator */
-	p = strchr(rdbuf, '*');
-	if (p)
-		*p++ = '\0';
+		error = edt_ft5x06_ts_readwrite(client, 1, "\xA8",
+						1, rdbuf);
+		if (error)
+			return error;
 
-	strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
-	strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
+		snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
+			rdbuf[0] >> 4, rdbuf[0] & 0x0F);
+	}
 
 	return 0;
 }
@@ -675,33 +856,104 @@ static int edt_ft5x06_ts_identify(struct i2c_client *client,
 	    pdata->name <= edt_ft5x06_attr_##name.limit_high)		\
 		edt_ft5x06_register_write(tsdata, reg, pdata->name)
 
+#define EDT_GET_PROP(name, reg) {				\
+	u32 val;						\
+	if (of_property_read_u32(np, #name, &val) == 0)		\
+		edt_ft5x06_register_write(tsdata, reg, val);	\
+}
+
+static void edt_ft5x06_ts_get_dt_defaults(struct device_node *np,
+					struct edt_ft5x06_ts_data *tsdata)
+{
+	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
+
+	EDT_GET_PROP(threshold, reg_addr->reg_threshold);
+	EDT_GET_PROP(gain, reg_addr->reg_gain);
+	EDT_GET_PROP(offset, reg_addr->reg_offset);
+}
+
 static void
 edt_ft5x06_ts_get_defaults(struct edt_ft5x06_ts_data *tsdata,
 			   const struct edt_ft5x06_platform_data *pdata)
 {
+	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
+
 	if (!pdata->use_parameters)
 		return;
 
 	/* pick up defaults from the platform data */
-	EDT_ATTR_CHECKSET(threshold, WORK_REGISTER_THRESHOLD);
-	EDT_ATTR_CHECKSET(gain, WORK_REGISTER_GAIN);
-	EDT_ATTR_CHECKSET(offset, WORK_REGISTER_OFFSET);
-	EDT_ATTR_CHECKSET(report_rate, WORK_REGISTER_REPORT_RATE);
+	EDT_ATTR_CHECKSET(threshold, reg_addr->reg_threshold);
+	EDT_ATTR_CHECKSET(gain, reg_addr->reg_gain);
+	EDT_ATTR_CHECKSET(offset, reg_addr->reg_offset);
+	if (reg_addr->reg_report_rate != NO_REGISTER)
+		EDT_ATTR_CHECKSET(report_rate, reg_addr->reg_report_rate);
 }
 
 static void
 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
 {
+	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
+
 	tsdata->threshold = edt_ft5x06_register_read(tsdata,
-						     WORK_REGISTER_THRESHOLD);
-	tsdata->gain = edt_ft5x06_register_read(tsdata, WORK_REGISTER_GAIN);
-	tsdata->offset = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OFFSET);
-	tsdata->report_rate = edt_ft5x06_register_read(tsdata,
-						WORK_REGISTER_REPORT_RATE);
-	tsdata->num_x = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_X);
-	tsdata->num_y = edt_ft5x06_register_read(tsdata, WORK_REGISTER_NUM_Y);
+						     reg_addr->reg_threshold);
+	tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
+	tsdata->offset = edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
+	if (reg_addr->reg_report_rate != NO_REGISTER)
+		tsdata->report_rate = edt_ft5x06_register_read(tsdata,
+						reg_addr->reg_report_rate);
+	tsdata->num_x = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_x);
+	tsdata->num_y = edt_ft5x06_register_read(tsdata, reg_addr->reg_num_y);
+}
+
+static void
+edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
+{
+	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
+
+	switch (tsdata->version) {
+	case M06:
+		reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
+		reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
+		reg_addr->reg_gain = WORK_REGISTER_GAIN;
+		reg_addr->reg_offset = WORK_REGISTER_OFFSET;
+		reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
+		reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
+		break;
+
+	case M09:
+		reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
+		reg_addr->reg_gain = M09_REGISTER_GAIN;
+		reg_addr->reg_offset = M09_REGISTER_OFFSET;
+		reg_addr->reg_num_x = M09_REGISTER_NUM_X;
+		reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
+		break;
+	}
 }
 
+#ifdef CONFIG_OF
+static int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
+				struct edt_ft5x06_ts_data *tsdata)
+{
+	struct device_node *np = dev->of_node;
+
+	/*
+	 * irq_pin is not needed for DT setup.
+	 * irq is associated via 'interrupts' property in DT
+	 */
+	tsdata->irq_pin = -EINVAL;
+	tsdata->reset_pin = of_get_named_gpio(np, "reset-gpios", 0);
+	tsdata->wake_pin = of_get_named_gpio(np, "wake-gpios", 0);
+
+	return 0;
+}
+#else
+static inline int edt_ft5x06_i2c_ts_probe_dt(struct device *dev,
+					struct edt_ft5x06_ts_data *tsdata)
+{
+	return -ENODEV;
+}
+#endif
+
 static int edt_ft5x06_ts_probe(struct i2c_client *client,
 					 const struct i2c_device_id *id)
 {
@@ -714,32 +966,40 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 
 	dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
 
+	tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
+	if (!tsdata) {
+		dev_err(&client->dev, "failed to allocate driver data.\n");
+		return -ENOMEM;
+	}
+
 	if (!pdata) {
-		dev_err(&client->dev, "no platform data?\n");
-		return -EINVAL;
+		error = edt_ft5x06_i2c_ts_probe_dt(&client->dev, tsdata);
+		if (error) {
+			dev_err(&client->dev,
+				"DT probe failed and no platform data present\n");
+			return error;
+		}
+	} else {
+		tsdata->reset_pin = pdata->reset_pin;
+		tsdata->irq_pin = pdata->irq_pin;
+		tsdata->wake_pin = -EINVAL;
 	}
 
-	error = edt_ft5x06_ts_reset(client, pdata->reset_pin);
+	error = edt_ft5x06_ts_reset(client, tsdata);
 	if (error)
 		return error;
 
-	if (gpio_is_valid(pdata->irq_pin)) {
-		error = devm_gpio_request_one(&client->dev, pdata->irq_pin,
-					      GPIOF_IN, "edt-ft5x06 irq");
+	if (gpio_is_valid(tsdata->irq_pin)) {
+		error = devm_gpio_request_one(&client->dev, tsdata->irq_pin,
+					GPIOF_IN, "edt-ft5x06 irq");
 		if (error) {
 			dev_err(&client->dev,
 				"Failed to request GPIO %d, error %d\n",
-				pdata->irq_pin, error);
+				tsdata->irq_pin, error);
 			return error;
 		}
 	}
 
-	tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
-	if (!tsdata) {
-		dev_err(&client->dev, "failed to allocate driver data.\n");
-		return -ENOMEM;
-	}
-
 	input = devm_input_allocate_device(&client->dev);
 	if (!input) {
 		dev_err(&client->dev, "failed to allocate input device.\n");
@@ -751,13 +1011,19 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 	tsdata->input = input;
 	tsdata->factory_mode = false;
 
-	error = edt_ft5x06_ts_identify(client, tsdata->name, fw_version);
+	error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
 	if (error) {
 		dev_err(&client->dev, "touchscreen probe failed\n");
 		return error;
 	}
 
-	edt_ft5x06_ts_get_defaults(tsdata, pdata);
+	edt_ft5x06_ts_set_regs(tsdata);
+
+	if (!pdata)
+		edt_ft5x06_ts_get_dt_defaults(client->dev.of_node, tsdata);
+	else
+		edt_ft5x06_ts_get_defaults(tsdata, pdata);
+
 	edt_ft5x06_ts_get_parameters(tsdata);
 
 	dev_dbg(&client->dev,
@@ -787,10 +1053,10 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 	input_set_drvdata(input, tsdata);
 	i2c_set_clientdata(client, tsdata);
 
-	error = devm_request_threaded_irq(&client->dev, client->irq,
-					  NULL, edt_ft5x06_ts_isr,
-					  IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-					  client->name, tsdata);
+	error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+					edt_ft5x06_ts_isr,
+					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					client->name, tsdata);
 	if (error) {
 		dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
 		return error;
@@ -801,19 +1067,21 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 		return error;
 
 	error = input_register_device(input);
-	if (error) {
-		sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
-		return error;
-	}
+	if (error)
+		goto err_remove_attrs;
 
 	edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
 	device_init_wakeup(&client->dev, 1);
 
 	dev_dbg(&client->dev,
-		"EDT FT5x06 initialized: IRQ pin %d, Reset pin %d.\n",
-		pdata->irq_pin, pdata->reset_pin);
+		"EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
+		client->irq, tsdata->wake_pin, tsdata->reset_pin);
 
 	return 0;
+
+err_remove_attrs:
+	sysfs_remove_group(&client->dev.kobj, &edt_ft5x06_attr_group);
+	return error;
 }
 
 static int edt_ft5x06_ts_remove(struct i2c_client *client)
@@ -852,15 +1120,26 @@ static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
 			 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
 
 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
-	{ "edt-ft5x06", 0 },
-	{ }
+	{ "edt-ft5x06", 0, },
+	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
 
+#ifdef CONFIG_OF
+static const struct of_device_id edt_ft5x06_of_match[] = {
+	{ .compatible = "edt,edt-ft5206", },
+	{ .compatible = "edt,edt-ft5306", },
+	{ .compatible = "edt,edt-ft5406", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
+#endif
+
 static struct i2c_driver edt_ft5x06_ts_driver = {
 	.driver = {
 		.owner = THIS_MODULE,
 		.name = "edt_ft5x06",
+		.of_match_table = of_match_ptr(edt_ft5x06_of_match),
 		.pm = &edt_ft5x06_ts_pm_ops,
 	},
 	.id_table = edt_ft5x06_ts_id,