1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2012 Simon Budig, <simon.budig@kernelconcepts.de>
4  * Daniel Wagener <daniel.wagener@kernelconcepts.de> (M09 firmware support)
5  * Lothar Waßmann <LW@KARO-electronics.de> (DT support)
6  */
7 
8 /*
9  * This is a driver for the EDT "Polytouch" family of touch controllers
10  * based on the FocalTech FT5x06 line of chips.
11  *
12  * Development of this driver has been sponsored by Glyn:
13  *    http://www.glyn.com/Products/Displays
14  */
15 
16 #include <linux/module.h>
17 #include <linux/ratelimit.h>
18 #include <linux/irq.h>
19 #include <linux/interrupt.h>
20 #include <linux/input.h>
21 #include <linux/i2c.h>
22 #include <linux/kernel.h>
23 #include <linux/uaccess.h>
24 #include <linux/delay.h>
25 #include <linux/debugfs.h>
26 #include <linux/slab.h>
27 #include <linux/gpio/consumer.h>
28 #include <linux/input/mt.h>
29 #include <linux/input/touchscreen.h>
30 #include <asm/unaligned.h>
31 
32 #define WORK_REGISTER_THRESHOLD		0x00
33 #define WORK_REGISTER_REPORT_RATE	0x08
34 #define WORK_REGISTER_GAIN		0x30
35 #define WORK_REGISTER_OFFSET		0x31
36 #define WORK_REGISTER_NUM_X		0x33
37 #define WORK_REGISTER_NUM_Y		0x34
38 
39 #define M09_REGISTER_THRESHOLD		0x80
40 #define M09_REGISTER_GAIN		0x92
41 #define M09_REGISTER_OFFSET		0x93
42 #define M09_REGISTER_NUM_X		0x94
43 #define M09_REGISTER_NUM_Y		0x95
44 
45 #define EV_REGISTER_THRESHOLD		0x40
46 #define EV_REGISTER_GAIN		0x41
47 #define EV_REGISTER_OFFSET_Y		0x45
48 #define EV_REGISTER_OFFSET_X		0x46
49 
50 #define NO_REGISTER			0xff
51 
52 #define WORK_REGISTER_OPMODE		0x3c
53 #define FACTORY_REGISTER_OPMODE		0x01
54 
55 #define TOUCH_EVENT_DOWN		0x00
56 #define TOUCH_EVENT_UP			0x01
57 #define TOUCH_EVENT_ON			0x02
58 #define TOUCH_EVENT_RESERVED		0x03
59 
60 #define EDT_NAME_LEN			23
61 #define EDT_SWITCH_MODE_RETRIES		10
62 #define EDT_SWITCH_MODE_DELAY		5 /* msec */
63 #define EDT_RAW_DATA_RETRIES		100
64 #define EDT_RAW_DATA_DELAY		1000 /* usec */
65 
66 enum edt_ver {
67 	EDT_M06,
68 	EDT_M09,
69 	EDT_M12,
70 	EV_FT,
71 	GENERIC_FT,
72 };
73 
74 struct edt_reg_addr {
75 	int reg_threshold;
76 	int reg_report_rate;
77 	int reg_gain;
78 	int reg_offset;
79 	int reg_offset_x;
80 	int reg_offset_y;
81 	int reg_num_x;
82 	int reg_num_y;
83 };
84 
85 struct edt_ft5x06_ts_data {
86 	struct i2c_client *client;
87 	struct input_dev *input;
88 	struct touchscreen_properties prop;
89 	u16 num_x;
90 	u16 num_y;
91 
92 	struct gpio_desc *reset_gpio;
93 	struct gpio_desc *wake_gpio;
94 
95 #if defined(CONFIG_DEBUG_FS)
96 	struct dentry *debug_dir;
97 	u8 *raw_buffer;
98 	size_t raw_bufsize;
99 #endif
100 
101 	struct mutex mutex;
102 	bool factory_mode;
103 	int threshold;
104 	int gain;
105 	int offset;
106 	int offset_x;
107 	int offset_y;
108 	int report_rate;
109 	int max_support_points;
110 
111 	char name[EDT_NAME_LEN];
112 
113 	struct edt_reg_addr reg_addr;
114 	enum edt_ver version;
115 };
116 
117 struct edt_i2c_chip_data {
118 	int  max_support_points;
119 };
120 
121 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
122 				   u16 wr_len, u8 *wr_buf,
123 				   u16 rd_len, u8 *rd_buf)
124 {
125 	struct i2c_msg wrmsg[2];
126 	int i = 0;
127 	int ret;
128 
129 	if (wr_len) {
130 		wrmsg[i].addr  = client->addr;
131 		wrmsg[i].flags = 0;
132 		wrmsg[i].len = wr_len;
133 		wrmsg[i].buf = wr_buf;
134 		i++;
135 	}
136 	if (rd_len) {
137 		wrmsg[i].addr  = client->addr;
138 		wrmsg[i].flags = I2C_M_RD;
139 		wrmsg[i].len = rd_len;
140 		wrmsg[i].buf = rd_buf;
141 		i++;
142 	}
143 
144 	ret = i2c_transfer(client->adapter, wrmsg, i);
145 	if (ret < 0)
146 		return ret;
147 	if (ret != i)
148 		return -EIO;
149 
150 	return 0;
151 }
152 
153 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
154 				    u8 *buf, int buflen)
155 {
156 	int i;
157 	u8 crc = 0;
158 
159 	for (i = 0; i < buflen - 1; i++)
160 		crc ^= buf[i];
161 
162 	if (crc != buf[buflen-1]) {
163 		dev_err_ratelimited(&tsdata->client->dev,
164 				    "crc error: 0x%02x expected, got 0x%02x\n",
165 				    crc, buf[buflen-1]);
166 		return false;
167 	}
168 
169 	return true;
170 }
171 
172 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
173 {
174 	struct edt_ft5x06_ts_data *tsdata = dev_id;
175 	struct device *dev = &tsdata->client->dev;
176 	u8 cmd;
177 	u8 rdbuf[63];
178 	int i, type, x, y, id;
179 	int offset, tplen, datalen, crclen;
180 	int error;
181 
182 	switch (tsdata->version) {
183 	case EDT_M06:
184 		cmd = 0xf9; /* tell the controller to send touch data */
185 		offset = 5; /* where the actual touch data starts */
186 		tplen = 4;  /* data comes in so called frames */
187 		crclen = 1; /* length of the crc data */
188 		break;
189 
190 	case EDT_M09:
191 	case EDT_M12:
192 	case EV_FT:
193 	case GENERIC_FT:
194 		cmd = 0x0;
195 		offset = 3;
196 		tplen = 6;
197 		crclen = 0;
198 		break;
199 
200 	default:
201 		goto out;
202 	}
203 
204 	memset(rdbuf, 0, sizeof(rdbuf));
205 	datalen = tplen * tsdata->max_support_points + offset + crclen;
206 
207 	error = edt_ft5x06_ts_readwrite(tsdata->client,
208 					sizeof(cmd), &cmd,
209 					datalen, rdbuf);
210 	if (error) {
211 		dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
212 				    error);
213 		goto out;
214 	}
215 
216 	/* M09/M12 does not send header or CRC */
217 	if (tsdata->version == EDT_M06) {
218 		if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
219 			rdbuf[2] != datalen) {
220 			dev_err_ratelimited(dev,
221 					"Unexpected header: %02x%02x%02x!\n",
222 					rdbuf[0], rdbuf[1], rdbuf[2]);
223 			goto out;
224 		}
225 
226 		if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
227 			goto out;
228 	}
229 
230 	for (i = 0; i < tsdata->max_support_points; i++) {
231 		u8 *buf = &rdbuf[i * tplen + offset];
232 
233 		type = buf[0] >> 6;
234 		/* ignore Reserved events */
235 		if (type == TOUCH_EVENT_RESERVED)
236 			continue;
237 
238 		/* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
239 		if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN)
240 			continue;
241 
242 		x = get_unaligned_be16(buf) & 0x0fff;
243 		y = get_unaligned_be16(buf + 2) & 0x0fff;
244 		/* The FT5x26 send the y coordinate first */
245 		if (tsdata->version == EV_FT)
246 			swap(x, y);
247 
248 		id = (buf[2] >> 4) & 0x0f;
249 
250 		input_mt_slot(tsdata->input, id);
251 		if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
252 					       type != TOUCH_EVENT_UP))
253 			touchscreen_report_pos(tsdata->input, &tsdata->prop,
254 					       x, y, true);
255 	}
256 
257 	input_mt_report_pointer_emulation(tsdata->input, true);
258 	input_sync(tsdata->input);
259 
260 out:
261 	return IRQ_HANDLED;
262 }
263 
264 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
265 				     u8 addr, u8 value)
266 {
267 	u8 wrbuf[4];
268 
269 	switch (tsdata->version) {
270 	case EDT_M06:
271 		wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
272 		wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
273 		wrbuf[2] = value;
274 		wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
275 		return edt_ft5x06_ts_readwrite(tsdata->client, 4,
276 					wrbuf, 0, NULL);
277 	/* fallthrough */
278 	case EDT_M09:
279 	case EDT_M12:
280 	case EV_FT:
281 	case GENERIC_FT:
282 		wrbuf[0] = addr;
283 		wrbuf[1] = value;
284 
285 		return edt_ft5x06_ts_readwrite(tsdata->client, 2,
286 					wrbuf, 0, NULL);
287 
288 	default:
289 		return -EINVAL;
290 	}
291 }
292 
293 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
294 				    u8 addr)
295 {
296 	u8 wrbuf[2], rdbuf[2];
297 	int error;
298 
299 	switch (tsdata->version) {
300 	case EDT_M06:
301 		wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
302 		wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
303 		wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
304 
305 		error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
306 						rdbuf);
307 		if (error)
308 			return error;
309 
310 		if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
311 			dev_err(&tsdata->client->dev,
312 				"crc error: 0x%02x expected, got 0x%02x\n",
313 				wrbuf[0] ^ wrbuf[1] ^ rdbuf[0],
314 				rdbuf[1]);
315 			return -EIO;
316 		}
317 		break;
318 
319 	/* fallthrough */
320 	case EDT_M09:
321 	case EDT_M12:
322 	case EV_FT:
323 	case GENERIC_FT:
324 		wrbuf[0] = addr;
325 		error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
326 						wrbuf, 1, rdbuf);
327 		if (error)
328 			return error;
329 		break;
330 
331 	default:
332 		return -EINVAL;
333 	}
334 
335 	return rdbuf[0];
336 }
337 
338 struct edt_ft5x06_attribute {
339 	struct device_attribute dattr;
340 	size_t field_offset;
341 	u8 limit_low;
342 	u8 limit_high;
343 	u8 addr_m06;
344 	u8 addr_m09;
345 	u8 addr_ev;
346 };
347 
348 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev,		\
349 		_limit_low, _limit_high)				\
350 	struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = {	\
351 		.dattr = __ATTR(_field, _mode,				\
352 				edt_ft5x06_setting_show,		\
353 				edt_ft5x06_setting_store),		\
354 		.field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
355 		.addr_m06 = _addr_m06,					\
356 		.addr_m09 = _addr_m09,					\
357 		.addr_ev  = _addr_ev,					\
358 		.limit_low = _limit_low,				\
359 		.limit_high = _limit_high,				\
360 	}
361 
362 static ssize_t edt_ft5x06_setting_show(struct device *dev,
363 				       struct device_attribute *dattr,
364 				       char *buf)
365 {
366 	struct i2c_client *client = to_i2c_client(dev);
367 	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
368 	struct edt_ft5x06_attribute *attr =
369 			container_of(dattr, struct edt_ft5x06_attribute, dattr);
370 	u8 *field = (u8 *)tsdata + attr->field_offset;
371 	int val;
372 	size_t count = 0;
373 	int error = 0;
374 	u8 addr;
375 
376 	mutex_lock(&tsdata->mutex);
377 
378 	if (tsdata->factory_mode) {
379 		error = -EIO;
380 		goto out;
381 	}
382 
383 	switch (tsdata->version) {
384 	case EDT_M06:
385 		addr = attr->addr_m06;
386 		break;
387 
388 	case EDT_M09:
389 	case EDT_M12:
390 	case GENERIC_FT:
391 		addr = attr->addr_m09;
392 		break;
393 
394 	case EV_FT:
395 		addr = attr->addr_ev;
396 		break;
397 
398 	default:
399 		error = -ENODEV;
400 		goto out;
401 	}
402 
403 	if (addr != NO_REGISTER) {
404 		val = edt_ft5x06_register_read(tsdata, addr);
405 		if (val < 0) {
406 			error = val;
407 			dev_err(&tsdata->client->dev,
408 				"Failed to fetch attribute %s, error %d\n",
409 				dattr->attr.name, error);
410 			goto out;
411 		}
412 	} else {
413 		val = *field;
414 	}
415 
416 	if (val != *field) {
417 		dev_warn(&tsdata->client->dev,
418 			 "%s: read (%d) and stored value (%d) differ\n",
419 			 dattr->attr.name, val, *field);
420 		*field = val;
421 	}
422 
423 	count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
424 out:
425 	mutex_unlock(&tsdata->mutex);
426 	return error ?: count;
427 }
428 
429 static ssize_t edt_ft5x06_setting_store(struct device *dev,
430 					struct device_attribute *dattr,
431 					const char *buf, size_t count)
432 {
433 	struct i2c_client *client = to_i2c_client(dev);
434 	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
435 	struct edt_ft5x06_attribute *attr =
436 			container_of(dattr, struct edt_ft5x06_attribute, dattr);
437 	u8 *field = (u8 *)tsdata + attr->field_offset;
438 	unsigned int val;
439 	int error;
440 	u8 addr;
441 
442 	mutex_lock(&tsdata->mutex);
443 
444 	if (tsdata->factory_mode) {
445 		error = -EIO;
446 		goto out;
447 	}
448 
449 	error = kstrtouint(buf, 0, &val);
450 	if (error)
451 		goto out;
452 
453 	if (val < attr->limit_low || val > attr->limit_high) {
454 		error = -ERANGE;
455 		goto out;
456 	}
457 
458 	switch (tsdata->version) {
459 	case EDT_M06:
460 		addr = attr->addr_m06;
461 		break;
462 
463 	case EDT_M09:
464 	case EDT_M12:
465 	case GENERIC_FT:
466 		addr = attr->addr_m09;
467 		break;
468 
469 	case EV_FT:
470 		addr = attr->addr_ev;
471 		break;
472 
473 	default:
474 		error = -ENODEV;
475 		goto out;
476 	}
477 
478 	if (addr != NO_REGISTER) {
479 		error = edt_ft5x06_register_write(tsdata, addr, val);
480 		if (error) {
481 			dev_err(&tsdata->client->dev,
482 				"Failed to update attribute %s, error: %d\n",
483 				dattr->attr.name, error);
484 			goto out;
485 		}
486 	}
487 	*field = val;
488 
489 out:
490 	mutex_unlock(&tsdata->mutex);
491 	return error ?: count;
492 }
493 
494 /* m06, m09: range 0-31, m12: range 0-5 */
495 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
496 		M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31);
497 /* m06, m09: range 0-31, m12: range 0-16 */
498 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
499 		M09_REGISTER_OFFSET, NO_REGISTER, 0, 31);
500 /* m06, m09, m12: no supported, ev_ft: range 0-80 */
501 static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
502 		EV_REGISTER_OFFSET_X, 0, 80);
503 /* m06, m09, m12: no supported, ev_ft: range 0-80 */
504 static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
505 		EV_REGISTER_OFFSET_Y, 0, 80);
506 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */
507 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
508 		M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255);
509 /* m06: range 3 to 14, m12: (0x64: 100Hz) */
510 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
511 		NO_REGISTER, NO_REGISTER, 0, 255);
512 
513 static struct attribute *edt_ft5x06_attrs[] = {
514 	&edt_ft5x06_attr_gain.dattr.attr,
515 	&edt_ft5x06_attr_offset.dattr.attr,
516 	&edt_ft5x06_attr_offset_x.dattr.attr,
517 	&edt_ft5x06_attr_offset_y.dattr.attr,
518 	&edt_ft5x06_attr_threshold.dattr.attr,
519 	&edt_ft5x06_attr_report_rate.dattr.attr,
520 	NULL
521 };
522 
523 static const struct attribute_group edt_ft5x06_attr_group = {
524 	.attrs = edt_ft5x06_attrs,
525 };
526 
527 #ifdef CONFIG_DEBUG_FS
528 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
529 {
530 	struct i2c_client *client = tsdata->client;
531 	int retries = EDT_SWITCH_MODE_RETRIES;
532 	int ret;
533 	int error;
534 
535 	if (tsdata->version != EDT_M06) {
536 		dev_err(&client->dev,
537 			"No factory mode support for non-M06 devices\n");
538 		return -EINVAL;
539 	}
540 
541 	disable_irq(client->irq);
542 
543 	if (!tsdata->raw_buffer) {
544 		tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
545 				      sizeof(u16);
546 		tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
547 		if (!tsdata->raw_buffer) {
548 			error = -ENOMEM;
549 			goto err_out;
550 		}
551 	}
552 
553 	/* mode register is 0x3c when in the work mode */
554 	error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
555 	if (error) {
556 		dev_err(&client->dev,
557 			"failed to switch to factory mode, error %d\n", error);
558 		goto err_out;
559 	}
560 
561 	tsdata->factory_mode = true;
562 	do {
563 		mdelay(EDT_SWITCH_MODE_DELAY);
564 		/* mode register is 0x01 when in factory mode */
565 		ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
566 		if (ret == 0x03)
567 			break;
568 	} while (--retries > 0);
569 
570 	if (retries == 0) {
571 		dev_err(&client->dev, "not in factory mode after %dms.\n",
572 			EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
573 		error = -EIO;
574 		goto err_out;
575 	}
576 
577 	return 0;
578 
579 err_out:
580 	kfree(tsdata->raw_buffer);
581 	tsdata->raw_buffer = NULL;
582 	tsdata->factory_mode = false;
583 	enable_irq(client->irq);
584 
585 	return error;
586 }
587 
588 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
589 {
590 	struct i2c_client *client = tsdata->client;
591 	int retries = EDT_SWITCH_MODE_RETRIES;
592 	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
593 	int ret;
594 	int error;
595 
596 	/* mode register is 0x01 when in the factory mode */
597 	error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
598 	if (error) {
599 		dev_err(&client->dev,
600 			"failed to switch to work mode, error: %d\n", error);
601 		return error;
602 	}
603 
604 	tsdata->factory_mode = false;
605 
606 	do {
607 		mdelay(EDT_SWITCH_MODE_DELAY);
608 		/* mode register is 0x01 when in factory mode */
609 		ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
610 		if (ret == 0x01)
611 			break;
612 	} while (--retries > 0);
613 
614 	if (retries == 0) {
615 		dev_err(&client->dev, "not in work mode after %dms.\n",
616 			EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
617 		tsdata->factory_mode = true;
618 		return -EIO;
619 	}
620 
621 	kfree(tsdata->raw_buffer);
622 	tsdata->raw_buffer = NULL;
623 
624 	/* restore parameters */
625 	edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
626 				  tsdata->threshold);
627 	edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
628 				  tsdata->gain);
629 	if (reg_addr->reg_offset != NO_REGISTER)
630 		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
631 					  tsdata->offset);
632 	if (reg_addr->reg_offset_x != NO_REGISTER)
633 		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x,
634 					  tsdata->offset_x);
635 	if (reg_addr->reg_offset_y != NO_REGISTER)
636 		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y,
637 					  tsdata->offset_y);
638 	if (reg_addr->reg_report_rate != NO_REGISTER)
639 		edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
640 				  tsdata->report_rate);
641 
642 	enable_irq(client->irq);
643 
644 	return 0;
645 }
646 
647 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
648 {
649 	struct edt_ft5x06_ts_data *tsdata = data;
650 
651 	*mode = tsdata->factory_mode;
652 
653 	return 0;
654 };
655 
656 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
657 {
658 	struct edt_ft5x06_ts_data *tsdata = data;
659 	int retval = 0;
660 
661 	if (mode > 1)
662 		return -ERANGE;
663 
664 	mutex_lock(&tsdata->mutex);
665 
666 	if (mode != tsdata->factory_mode) {
667 		retval = mode ? edt_ft5x06_factory_mode(tsdata) :
668 				edt_ft5x06_work_mode(tsdata);
669 	}
670 
671 	mutex_unlock(&tsdata->mutex);
672 
673 	return retval;
674 };
675 
676 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
677 			edt_ft5x06_debugfs_mode_set, "%llu\n");
678 
679 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
680 				char __user *buf, size_t count, loff_t *off)
681 {
682 	struct edt_ft5x06_ts_data *tsdata = file->private_data;
683 	struct i2c_client *client = tsdata->client;
684 	int retries  = EDT_RAW_DATA_RETRIES;
685 	int val, i, error;
686 	size_t read = 0;
687 	int colbytes;
688 	char wrbuf[3];
689 	u8 *rdbuf;
690 
691 	if (*off < 0 || *off >= tsdata->raw_bufsize)
692 		return 0;
693 
694 	mutex_lock(&tsdata->mutex);
695 
696 	if (!tsdata->factory_mode || !tsdata->raw_buffer) {
697 		error = -EIO;
698 		goto out;
699 	}
700 
701 	error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
702 	if (error) {
703 		dev_dbg(&client->dev,
704 			"failed to write 0x08 register, error %d\n", error);
705 		goto out;
706 	}
707 
708 	do {
709 		usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100);
710 		val = edt_ft5x06_register_read(tsdata, 0x08);
711 		if (val < 1)
712 			break;
713 	} while (--retries > 0);
714 
715 	if (val < 0) {
716 		error = val;
717 		dev_dbg(&client->dev,
718 			"failed to read 0x08 register, error %d\n", error);
719 		goto out;
720 	}
721 
722 	if (retries == 0) {
723 		dev_dbg(&client->dev,
724 			"timed out waiting for register to settle\n");
725 		error = -ETIMEDOUT;
726 		goto out;
727 	}
728 
729 	rdbuf = tsdata->raw_buffer;
730 	colbytes = tsdata->num_y * sizeof(u16);
731 
732 	wrbuf[0] = 0xf5;
733 	wrbuf[1] = 0x0e;
734 	for (i = 0; i < tsdata->num_x; i++) {
735 		wrbuf[2] = i;  /* column index */
736 		error = edt_ft5x06_ts_readwrite(tsdata->client,
737 						sizeof(wrbuf), wrbuf,
738 						colbytes, rdbuf);
739 		if (error)
740 			goto out;
741 
742 		rdbuf += colbytes;
743 	}
744 
745 	read = min_t(size_t, count, tsdata->raw_bufsize - *off);
746 	if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
747 		error = -EFAULT;
748 		goto out;
749 	}
750 
751 	*off += read;
752 out:
753 	mutex_unlock(&tsdata->mutex);
754 	return error ?: read;
755 };
756 
757 static const struct file_operations debugfs_raw_data_fops = {
758 	.open = simple_open,
759 	.read = edt_ft5x06_debugfs_raw_data_read,
760 };
761 
762 static void
763 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
764 			      const char *debugfs_name)
765 {
766 	tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
767 
768 	debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
769 	debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
770 
771 	debugfs_create_file("mode", S_IRUSR | S_IWUSR,
772 			    tsdata->debug_dir, tsdata, &debugfs_mode_fops);
773 	debugfs_create_file("raw_data", S_IRUSR,
774 			    tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
775 }
776 
777 static void
778 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
779 {
780 	debugfs_remove_recursive(tsdata->debug_dir);
781 	kfree(tsdata->raw_buffer);
782 }
783 
784 #else
785 
786 static inline void
787 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
788 			      const char *debugfs_name)
789 {
790 }
791 
792 static inline void
793 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
794 {
795 }
796 
797 #endif /* CONFIG_DEBUGFS */
798 
799 static int edt_ft5x06_ts_identify(struct i2c_client *client,
800 					struct edt_ft5x06_ts_data *tsdata,
801 					char *fw_version)
802 {
803 	u8 rdbuf[EDT_NAME_LEN];
804 	char *p;
805 	int error;
806 	char *model_name = tsdata->name;
807 
808 	/* see what we find if we assume it is a M06 *
809 	 * if we get less than EDT_NAME_LEN, we don't want
810 	 * to have garbage in there
811 	 */
812 	memset(rdbuf, 0, sizeof(rdbuf));
813 	error = edt_ft5x06_ts_readwrite(client, 1, "\xBB",
814 					EDT_NAME_LEN - 1, rdbuf);
815 	if (error)
816 		return error;
817 
818 	/* Probe content for something consistent.
819 	 * M06 starts with a response byte, M12 gives the data directly.
820 	 * M09/Generic does not provide model number information.
821 	 */
822 	if (!strncasecmp(rdbuf + 1, "EP0", 3)) {
823 		tsdata->version = EDT_M06;
824 
825 		/* remove last '$' end marker */
826 		rdbuf[EDT_NAME_LEN - 1] = '\0';
827 		if (rdbuf[EDT_NAME_LEN - 2] == '$')
828 			rdbuf[EDT_NAME_LEN - 2] = '\0';
829 
830 		/* look for Model/Version separator */
831 		p = strchr(rdbuf, '*');
832 		if (p)
833 			*p++ = '\0';
834 		strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
835 		strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
836 	} else if (!strncasecmp(rdbuf, "EP0", 3)) {
837 		tsdata->version = EDT_M12;
838 
839 		/* remove last '$' end marker */
840 		rdbuf[EDT_NAME_LEN - 2] = '\0';
841 		if (rdbuf[EDT_NAME_LEN - 3] == '$')
842 			rdbuf[EDT_NAME_LEN - 3] = '\0';
843 
844 		/* look for Model/Version separator */
845 		p = strchr(rdbuf, '*');
846 		if (p)
847 			*p++ = '\0';
848 		strlcpy(model_name, rdbuf, EDT_NAME_LEN);
849 		strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
850 	} else {
851 		/* If it is not an EDT M06/M12 touchscreen, then the model
852 		 * detection is a bit hairy. The different ft5x06
853 		 * firmares around don't reliably implement the
854 		 * identification registers. Well, we'll take a shot.
855 		 *
856 		 * The main difference between generic focaltec based
857 		 * touches and EDT M09 is that we know how to retrieve
858 		 * the max coordinates for the latter.
859 		 */
860 		tsdata->version = GENERIC_FT;
861 
862 		error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
863 						2, rdbuf);
864 		if (error)
865 			return error;
866 
867 		strlcpy(fw_version, rdbuf, 2);
868 
869 		error = edt_ft5x06_ts_readwrite(client, 1, "\xA8",
870 						1, rdbuf);
871 		if (error)
872 			return error;
873 
874 		/* This "model identification" is not exact. Unfortunately
875 		 * not all firmwares for the ft5x06 put useful values in
876 		 * the identification registers.
877 		 */
878 		switch (rdbuf[0]) {
879 		case 0x35:   /* EDT EP0350M09 */
880 		case 0x43:   /* EDT EP0430M09 */
881 		case 0x50:   /* EDT EP0500M09 */
882 		case 0x57:   /* EDT EP0570M09 */
883 		case 0x70:   /* EDT EP0700M09 */
884 			tsdata->version = EDT_M09;
885 			snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
886 				rdbuf[0] >> 4, rdbuf[0] & 0x0F);
887 			break;
888 		case 0xa1:   /* EDT EP1010ML00 */
889 			tsdata->version = EDT_M09;
890 			snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00",
891 				rdbuf[0] >> 4, rdbuf[0] & 0x0F);
892 			break;
893 		case 0x5a:   /* Solomon Goldentek Display */
894 			snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0");
895 			break;
896 		case 0x59:  /* Evervision Display with FT5xx6 TS */
897 			tsdata->version = EV_FT;
898 			error = edt_ft5x06_ts_readwrite(client, 1, "\x53",
899 							1, rdbuf);
900 			if (error)
901 				return error;
902 			strlcpy(fw_version, rdbuf, 1);
903 			snprintf(model_name, EDT_NAME_LEN,
904 				 "EVERVISION-FT5726NEi");
905 			break;
906 		default:
907 			snprintf(model_name, EDT_NAME_LEN,
908 				 "generic ft5x06 (%02x)",
909 				 rdbuf[0]);
910 			break;
911 		}
912 	}
913 
914 	return 0;
915 }
916 
917 static void edt_ft5x06_ts_get_defaults(struct device *dev,
918 				       struct edt_ft5x06_ts_data *tsdata)
919 {
920 	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
921 	u32 val;
922 	int error;
923 
924 	error = device_property_read_u32(dev, "threshold", &val);
925 	if (!error) {
926 		edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, val);
927 		tsdata->threshold = val;
928 	}
929 
930 	error = device_property_read_u32(dev, "gain", &val);
931 	if (!error) {
932 		edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, val);
933 		tsdata->gain = val;
934 	}
935 
936 	error = device_property_read_u32(dev, "offset", &val);
937 	if (!error) {
938 		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, val);
939 		tsdata->offset = val;
940 	}
941 
942 	error = device_property_read_u32(dev, "offset-x", &val);
943 	if (!error) {
944 		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x, val);
945 		tsdata->offset_x = val;
946 	}
947 
948 	error = device_property_read_u32(dev, "offset-y", &val);
949 	if (!error) {
950 		edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y, val);
951 		tsdata->offset_y = val;
952 	}
953 }
954 
955 static void
956 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
957 {
958 	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
959 
960 	tsdata->threshold = edt_ft5x06_register_read(tsdata,
961 						     reg_addr->reg_threshold);
962 	tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
963 	if (reg_addr->reg_offset != NO_REGISTER)
964 		tsdata->offset =
965 			edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
966 	if (reg_addr->reg_offset_x != NO_REGISTER)
967 		tsdata->offset_x = edt_ft5x06_register_read(tsdata,
968 						reg_addr->reg_offset_x);
969 	if (reg_addr->reg_offset_y != NO_REGISTER)
970 		tsdata->offset_y = edt_ft5x06_register_read(tsdata,
971 						reg_addr->reg_offset_y);
972 	if (reg_addr->reg_report_rate != NO_REGISTER)
973 		tsdata->report_rate = edt_ft5x06_register_read(tsdata,
974 						reg_addr->reg_report_rate);
975 	if (tsdata->version == EDT_M06 ||
976 	    tsdata->version == EDT_M09 ||
977 	    tsdata->version == EDT_M12) {
978 		tsdata->num_x = edt_ft5x06_register_read(tsdata,
979 							 reg_addr->reg_num_x);
980 		tsdata->num_y = edt_ft5x06_register_read(tsdata,
981 							 reg_addr->reg_num_y);
982 	} else {
983 		tsdata->num_x = -1;
984 		tsdata->num_y = -1;
985 	}
986 }
987 
988 static void
989 edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
990 {
991 	struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
992 
993 	switch (tsdata->version) {
994 	case EDT_M06:
995 		reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
996 		reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
997 		reg_addr->reg_gain = WORK_REGISTER_GAIN;
998 		reg_addr->reg_offset = WORK_REGISTER_OFFSET;
999 		reg_addr->reg_offset_x = NO_REGISTER;
1000 		reg_addr->reg_offset_y = NO_REGISTER;
1001 		reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
1002 		reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
1003 		break;
1004 
1005 	case EDT_M09:
1006 	case EDT_M12:
1007 		reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1008 		reg_addr->reg_report_rate = NO_REGISTER;
1009 		reg_addr->reg_gain = M09_REGISTER_GAIN;
1010 		reg_addr->reg_offset = M09_REGISTER_OFFSET;
1011 		reg_addr->reg_offset_x = NO_REGISTER;
1012 		reg_addr->reg_offset_y = NO_REGISTER;
1013 		reg_addr->reg_num_x = M09_REGISTER_NUM_X;
1014 		reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
1015 		break;
1016 
1017 	case EV_FT:
1018 		reg_addr->reg_threshold = EV_REGISTER_THRESHOLD;
1019 		reg_addr->reg_gain = EV_REGISTER_GAIN;
1020 		reg_addr->reg_offset = NO_REGISTER;
1021 		reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X;
1022 		reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y;
1023 		reg_addr->reg_num_x = NO_REGISTER;
1024 		reg_addr->reg_num_y = NO_REGISTER;
1025 		reg_addr->reg_report_rate = NO_REGISTER;
1026 		break;
1027 
1028 	case GENERIC_FT:
1029 		/* this is a guesswork */
1030 		reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1031 		reg_addr->reg_gain = M09_REGISTER_GAIN;
1032 		reg_addr->reg_offset = M09_REGISTER_OFFSET;
1033 		reg_addr->reg_offset_x = NO_REGISTER;
1034 		reg_addr->reg_offset_y = NO_REGISTER;
1035 		break;
1036 	}
1037 }
1038 
1039 static int edt_ft5x06_ts_probe(struct i2c_client *client,
1040 					 const struct i2c_device_id *id)
1041 {
1042 	const struct edt_i2c_chip_data *chip_data;
1043 	struct edt_ft5x06_ts_data *tsdata;
1044 	struct input_dev *input;
1045 	unsigned long irq_flags;
1046 	int error;
1047 	char fw_version[EDT_NAME_LEN];
1048 
1049 	dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
1050 
1051 	tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
1052 	if (!tsdata) {
1053 		dev_err(&client->dev, "failed to allocate driver data.\n");
1054 		return -ENOMEM;
1055 	}
1056 
1057 	chip_data = device_get_match_data(&client->dev);
1058 	if (!chip_data)
1059 		chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
1060 	if (!chip_data || !chip_data->max_support_points) {
1061 		dev_err(&client->dev, "invalid or missing chip data\n");
1062 		return -EINVAL;
1063 	}
1064 
1065 	tsdata->max_support_points = chip_data->max_support_points;
1066 
1067 	tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
1068 						     "reset", GPIOD_OUT_HIGH);
1069 	if (IS_ERR(tsdata->reset_gpio)) {
1070 		error = PTR_ERR(tsdata->reset_gpio);
1071 		dev_err(&client->dev,
1072 			"Failed to request GPIO reset pin, error %d\n", error);
1073 		return error;
1074 	}
1075 
1076 	tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
1077 						    "wake", GPIOD_OUT_LOW);
1078 	if (IS_ERR(tsdata->wake_gpio)) {
1079 		error = PTR_ERR(tsdata->wake_gpio);
1080 		dev_err(&client->dev,
1081 			"Failed to request GPIO wake pin, error %d\n", error);
1082 		return error;
1083 	}
1084 
1085 	if (tsdata->wake_gpio) {
1086 		usleep_range(5000, 6000);
1087 		gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
1088 	}
1089 
1090 	if (tsdata->reset_gpio) {
1091 		usleep_range(5000, 6000);
1092 		gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
1093 		msleep(300);
1094 	}
1095 
1096 	input = devm_input_allocate_device(&client->dev);
1097 	if (!input) {
1098 		dev_err(&client->dev, "failed to allocate input device.\n");
1099 		return -ENOMEM;
1100 	}
1101 
1102 	mutex_init(&tsdata->mutex);
1103 	tsdata->client = client;
1104 	tsdata->input = input;
1105 	tsdata->factory_mode = false;
1106 
1107 	error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
1108 	if (error) {
1109 		dev_err(&client->dev, "touchscreen probe failed\n");
1110 		return error;
1111 	}
1112 
1113 	edt_ft5x06_ts_set_regs(tsdata);
1114 	edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
1115 	edt_ft5x06_ts_get_parameters(tsdata);
1116 
1117 	dev_dbg(&client->dev,
1118 		"Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
1119 		tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
1120 
1121 	input->name = tsdata->name;
1122 	input->id.bustype = BUS_I2C;
1123 	input->dev.parent = &client->dev;
1124 
1125 	if (tsdata->version == EDT_M06 ||
1126 	    tsdata->version == EDT_M09 ||
1127 	    tsdata->version == EDT_M12) {
1128 		input_set_abs_params(input, ABS_MT_POSITION_X,
1129 				     0, tsdata->num_x * 64 - 1, 0, 0);
1130 		input_set_abs_params(input, ABS_MT_POSITION_Y,
1131 				     0, tsdata->num_y * 64 - 1, 0, 0);
1132 	} else {
1133 		/* Unknown maximum values. Specify via devicetree */
1134 		input_set_abs_params(input, ABS_MT_POSITION_X,
1135 				     0, 65535, 0, 0);
1136 		input_set_abs_params(input, ABS_MT_POSITION_Y,
1137 				     0, 65535, 0, 0);
1138 	}
1139 
1140 	touchscreen_parse_properties(input, true, &tsdata->prop);
1141 
1142 	error = input_mt_init_slots(input, tsdata->max_support_points,
1143 				INPUT_MT_DIRECT);
1144 	if (error) {
1145 		dev_err(&client->dev, "Unable to init MT slots.\n");
1146 		return error;
1147 	}
1148 
1149 	i2c_set_clientdata(client, tsdata);
1150 
1151 	irq_flags = irq_get_trigger_type(client->irq);
1152 	if (irq_flags == IRQF_TRIGGER_NONE)
1153 		irq_flags = IRQF_TRIGGER_FALLING;
1154 	irq_flags |= IRQF_ONESHOT;
1155 
1156 	error = devm_request_threaded_irq(&client->dev, client->irq,
1157 					NULL, edt_ft5x06_ts_isr, irq_flags,
1158 					client->name, tsdata);
1159 	if (error) {
1160 		dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
1161 		return error;
1162 	}
1163 
1164 	error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group);
1165 	if (error)
1166 		return error;
1167 
1168 	error = input_register_device(input);
1169 	if (error)
1170 		return error;
1171 
1172 	edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1173 	device_init_wakeup(&client->dev, 1);
1174 
1175 	dev_dbg(&client->dev,
1176 		"EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1177 		client->irq,
1178 		tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1,
1179 		tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
1180 
1181 	return 0;
1182 }
1183 
1184 static int edt_ft5x06_ts_remove(struct i2c_client *client)
1185 {
1186 	struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1187 
1188 	edt_ft5x06_ts_teardown_debugfs(tsdata);
1189 
1190 	return 0;
1191 }
1192 
1193 static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
1194 {
1195 	struct i2c_client *client = to_i2c_client(dev);
1196 
1197 	if (device_may_wakeup(dev))
1198 		enable_irq_wake(client->irq);
1199 
1200 	return 0;
1201 }
1202 
1203 static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
1204 {
1205 	struct i2c_client *client = to_i2c_client(dev);
1206 
1207 	if (device_may_wakeup(dev))
1208 		disable_irq_wake(client->irq);
1209 
1210 	return 0;
1211 }
1212 
1213 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1214 			 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1215 
1216 static const struct edt_i2c_chip_data edt_ft5x06_data = {
1217 	.max_support_points = 5,
1218 };
1219 
1220 static const struct edt_i2c_chip_data edt_ft5506_data = {
1221 	.max_support_points = 10,
1222 };
1223 
1224 static const struct edt_i2c_chip_data edt_ft6236_data = {
1225 	.max_support_points = 2,
1226 };
1227 
1228 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1229 	{ .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
1230 	{ .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
1231 	{ .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data },
1232 	/* Note no edt- prefix for compatibility with the ft6236.c driver */
1233 	{ .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
1234 	{ /* sentinel */ }
1235 };
1236 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1237 
1238 static const struct of_device_id edt_ft5x06_of_match[] = {
1239 	{ .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
1240 	{ .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
1241 	{ .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
1242 	{ .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
1243 	{ .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
1244 	/* Note focaltech vendor prefix for compatibility with ft6236.c */
1245 	{ .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
1246 	{ /* sentinel */ }
1247 };
1248 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1249 
1250 static struct i2c_driver edt_ft5x06_ts_driver = {
1251 	.driver = {
1252 		.name = "edt_ft5x06",
1253 		.of_match_table = edt_ft5x06_of_match,
1254 		.pm = &edt_ft5x06_ts_pm_ops,
1255 	},
1256 	.id_table = edt_ft5x06_ts_id,
1257 	.probe    = edt_ft5x06_ts_probe,
1258 	.remove   = edt_ft5x06_ts_remove,
1259 };
1260 
1261 module_i2c_driver(edt_ft5x06_ts_driver);
1262 
1263 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1264 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1265 MODULE_LICENSE("GPL v2");
1266