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
edt_ft5x06_ts_readwrite(struct i2c_client * client,u16 wr_len,u8 * wr_buf,u16 rd_len,u8 * rd_buf)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
edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data * tsdata,u8 * buf,int buflen)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
edt_ft5x06_ts_isr(int irq,void * dev_id)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
edt_ft5x06_register_write(struct edt_ft5x06_ts_data * tsdata,u8 addr,u8 value)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
edt_ft5x06_register_read(struct edt_ft5x06_ts_data * tsdata,u8 addr)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
edt_ft5x06_setting_show(struct device * dev,struct device_attribute * dattr,char * buf)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
edt_ft5x06_setting_store(struct device * dev,struct device_attribute * dattr,const char * buf,size_t count)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
edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data * tsdata)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
edt_ft5x06_work_mode(struct edt_ft5x06_ts_data * tsdata)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
edt_ft5x06_debugfs_mode_get(void * data,u64 * mode)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
edt_ft5x06_debugfs_mode_set(void * data,u64 mode)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
edt_ft5x06_debugfs_raw_data_read(struct file * file,char __user * buf,size_t count,loff_t * off)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
edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data * tsdata,const char * debugfs_name)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
edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data * tsdata)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
edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data * tsdata,const char * debugfs_name)787 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
788 const char *debugfs_name)
789 {
790 }
791
792 static inline void
edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data * tsdata)793 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
794 {
795 }
796
797 #endif /* CONFIG_DEBUGFS */
798
edt_ft5x06_ts_identify(struct i2c_client * client,struct edt_ft5x06_ts_data * tsdata,char * fw_version)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
edt_ft5x06_ts_get_defaults(struct device * dev,struct edt_ft5x06_ts_data * tsdata)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 if (reg_addr->reg_offset != NO_REGISTER)
939 edt_ft5x06_register_write(tsdata,
940 reg_addr->reg_offset, val);
941 tsdata->offset = val;
942 }
943
944 error = device_property_read_u32(dev, "offset-x", &val);
945 if (!error) {
946 if (reg_addr->reg_offset_x != NO_REGISTER)
947 edt_ft5x06_register_write(tsdata,
948 reg_addr->reg_offset_x, val);
949 tsdata->offset_x = val;
950 }
951
952 error = device_property_read_u32(dev, "offset-y", &val);
953 if (!error) {
954 if (reg_addr->reg_offset_y != NO_REGISTER)
955 edt_ft5x06_register_write(tsdata,
956 reg_addr->reg_offset_y, val);
957 tsdata->offset_y = val;
958 }
959 }
960
961 static void
edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data * tsdata)962 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
963 {
964 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
965
966 tsdata->threshold = edt_ft5x06_register_read(tsdata,
967 reg_addr->reg_threshold);
968 tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
969 if (reg_addr->reg_offset != NO_REGISTER)
970 tsdata->offset =
971 edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
972 if (reg_addr->reg_offset_x != NO_REGISTER)
973 tsdata->offset_x = edt_ft5x06_register_read(tsdata,
974 reg_addr->reg_offset_x);
975 if (reg_addr->reg_offset_y != NO_REGISTER)
976 tsdata->offset_y = edt_ft5x06_register_read(tsdata,
977 reg_addr->reg_offset_y);
978 if (reg_addr->reg_report_rate != NO_REGISTER)
979 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
980 reg_addr->reg_report_rate);
981 if (tsdata->version == EDT_M06 ||
982 tsdata->version == EDT_M09 ||
983 tsdata->version == EDT_M12) {
984 tsdata->num_x = edt_ft5x06_register_read(tsdata,
985 reg_addr->reg_num_x);
986 tsdata->num_y = edt_ft5x06_register_read(tsdata,
987 reg_addr->reg_num_y);
988 } else {
989 tsdata->num_x = -1;
990 tsdata->num_y = -1;
991 }
992 }
993
994 static void
edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data * tsdata)995 edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
996 {
997 struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
998
999 switch (tsdata->version) {
1000 case EDT_M06:
1001 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
1002 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
1003 reg_addr->reg_gain = WORK_REGISTER_GAIN;
1004 reg_addr->reg_offset = WORK_REGISTER_OFFSET;
1005 reg_addr->reg_offset_x = NO_REGISTER;
1006 reg_addr->reg_offset_y = NO_REGISTER;
1007 reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
1008 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
1009 break;
1010
1011 case EDT_M09:
1012 case EDT_M12:
1013 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1014 reg_addr->reg_report_rate = NO_REGISTER;
1015 reg_addr->reg_gain = M09_REGISTER_GAIN;
1016 reg_addr->reg_offset = M09_REGISTER_OFFSET;
1017 reg_addr->reg_offset_x = NO_REGISTER;
1018 reg_addr->reg_offset_y = NO_REGISTER;
1019 reg_addr->reg_num_x = M09_REGISTER_NUM_X;
1020 reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
1021 break;
1022
1023 case EV_FT:
1024 reg_addr->reg_threshold = EV_REGISTER_THRESHOLD;
1025 reg_addr->reg_gain = EV_REGISTER_GAIN;
1026 reg_addr->reg_offset = NO_REGISTER;
1027 reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X;
1028 reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y;
1029 reg_addr->reg_num_x = NO_REGISTER;
1030 reg_addr->reg_num_y = NO_REGISTER;
1031 reg_addr->reg_report_rate = NO_REGISTER;
1032 break;
1033
1034 case GENERIC_FT:
1035 /* this is a guesswork */
1036 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1037 reg_addr->reg_gain = M09_REGISTER_GAIN;
1038 reg_addr->reg_offset = M09_REGISTER_OFFSET;
1039 reg_addr->reg_offset_x = NO_REGISTER;
1040 reg_addr->reg_offset_y = NO_REGISTER;
1041 break;
1042 }
1043 }
1044
edt_ft5x06_ts_probe(struct i2c_client * client,const struct i2c_device_id * id)1045 static int edt_ft5x06_ts_probe(struct i2c_client *client,
1046 const struct i2c_device_id *id)
1047 {
1048 const struct edt_i2c_chip_data *chip_data;
1049 struct edt_ft5x06_ts_data *tsdata;
1050 u8 buf[2] = { 0xfc, 0x00 };
1051 struct input_dev *input;
1052 unsigned long irq_flags;
1053 int error;
1054 char fw_version[EDT_NAME_LEN];
1055
1056 dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
1057
1058 tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
1059 if (!tsdata) {
1060 dev_err(&client->dev, "failed to allocate driver data.\n");
1061 return -ENOMEM;
1062 }
1063
1064 chip_data = device_get_match_data(&client->dev);
1065 if (!chip_data)
1066 chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
1067 if (!chip_data || !chip_data->max_support_points) {
1068 dev_err(&client->dev, "invalid or missing chip data\n");
1069 return -EINVAL;
1070 }
1071
1072 tsdata->max_support_points = chip_data->max_support_points;
1073
1074 tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
1075 "reset", GPIOD_OUT_HIGH);
1076 if (IS_ERR(tsdata->reset_gpio)) {
1077 error = PTR_ERR(tsdata->reset_gpio);
1078 dev_err(&client->dev,
1079 "Failed to request GPIO reset pin, error %d\n", error);
1080 return error;
1081 }
1082
1083 tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
1084 "wake", GPIOD_OUT_LOW);
1085 if (IS_ERR(tsdata->wake_gpio)) {
1086 error = PTR_ERR(tsdata->wake_gpio);
1087 dev_err(&client->dev,
1088 "Failed to request GPIO wake pin, error %d\n", error);
1089 return error;
1090 }
1091
1092 if (tsdata->wake_gpio) {
1093 usleep_range(5000, 6000);
1094 gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
1095 }
1096
1097 if (tsdata->reset_gpio) {
1098 usleep_range(5000, 6000);
1099 gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
1100 msleep(300);
1101 }
1102
1103 input = devm_input_allocate_device(&client->dev);
1104 if (!input) {
1105 dev_err(&client->dev, "failed to allocate input device.\n");
1106 return -ENOMEM;
1107 }
1108
1109 mutex_init(&tsdata->mutex);
1110 tsdata->client = client;
1111 tsdata->input = input;
1112 tsdata->factory_mode = false;
1113
1114 error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
1115 if (error) {
1116 dev_err(&client->dev, "touchscreen probe failed\n");
1117 return error;
1118 }
1119
1120 /*
1121 * Dummy read access. EP0700MLP1 returns bogus data on the first
1122 * register read access and ignores writes.
1123 */
1124 edt_ft5x06_ts_readwrite(tsdata->client, 2, buf, 2, buf);
1125
1126 edt_ft5x06_ts_set_regs(tsdata);
1127 edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
1128 edt_ft5x06_ts_get_parameters(tsdata);
1129
1130 dev_dbg(&client->dev,
1131 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
1132 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
1133
1134 input->name = tsdata->name;
1135 input->id.bustype = BUS_I2C;
1136 input->dev.parent = &client->dev;
1137
1138 if (tsdata->version == EDT_M06 ||
1139 tsdata->version == EDT_M09 ||
1140 tsdata->version == EDT_M12) {
1141 input_set_abs_params(input, ABS_MT_POSITION_X,
1142 0, tsdata->num_x * 64 - 1, 0, 0);
1143 input_set_abs_params(input, ABS_MT_POSITION_Y,
1144 0, tsdata->num_y * 64 - 1, 0, 0);
1145 } else {
1146 /* Unknown maximum values. Specify via devicetree */
1147 input_set_abs_params(input, ABS_MT_POSITION_X,
1148 0, 65535, 0, 0);
1149 input_set_abs_params(input, ABS_MT_POSITION_Y,
1150 0, 65535, 0, 0);
1151 }
1152
1153 touchscreen_parse_properties(input, true, &tsdata->prop);
1154
1155 error = input_mt_init_slots(input, tsdata->max_support_points,
1156 INPUT_MT_DIRECT);
1157 if (error) {
1158 dev_err(&client->dev, "Unable to init MT slots.\n");
1159 return error;
1160 }
1161
1162 i2c_set_clientdata(client, tsdata);
1163
1164 irq_flags = irq_get_trigger_type(client->irq);
1165 if (irq_flags == IRQF_TRIGGER_NONE)
1166 irq_flags = IRQF_TRIGGER_FALLING;
1167 irq_flags |= IRQF_ONESHOT;
1168
1169 error = devm_request_threaded_irq(&client->dev, client->irq,
1170 NULL, edt_ft5x06_ts_isr, irq_flags,
1171 client->name, tsdata);
1172 if (error) {
1173 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
1174 return error;
1175 }
1176
1177 error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group);
1178 if (error)
1179 return error;
1180
1181 error = input_register_device(input);
1182 if (error)
1183 return error;
1184
1185 edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1186 device_init_wakeup(&client->dev, 1);
1187
1188 dev_dbg(&client->dev,
1189 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1190 client->irq,
1191 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1,
1192 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
1193
1194 return 0;
1195 }
1196
edt_ft5x06_ts_remove(struct i2c_client * client)1197 static int edt_ft5x06_ts_remove(struct i2c_client *client)
1198 {
1199 struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1200
1201 edt_ft5x06_ts_teardown_debugfs(tsdata);
1202
1203 return 0;
1204 }
1205
edt_ft5x06_ts_suspend(struct device * dev)1206 static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
1207 {
1208 struct i2c_client *client = to_i2c_client(dev);
1209
1210 if (device_may_wakeup(dev))
1211 enable_irq_wake(client->irq);
1212
1213 return 0;
1214 }
1215
edt_ft5x06_ts_resume(struct device * dev)1216 static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
1217 {
1218 struct i2c_client *client = to_i2c_client(dev);
1219
1220 if (device_may_wakeup(dev))
1221 disable_irq_wake(client->irq);
1222
1223 return 0;
1224 }
1225
1226 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1227 edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1228
1229 static const struct edt_i2c_chip_data edt_ft5x06_data = {
1230 .max_support_points = 5,
1231 };
1232
1233 static const struct edt_i2c_chip_data edt_ft5506_data = {
1234 .max_support_points = 10,
1235 };
1236
1237 static const struct edt_i2c_chip_data edt_ft6236_data = {
1238 .max_support_points = 2,
1239 };
1240
1241 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1242 { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
1243 { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
1244 { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data },
1245 /* Note no edt- prefix for compatibility with the ft6236.c driver */
1246 { .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
1247 { /* sentinel */ }
1248 };
1249 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1250
1251 static const struct of_device_id edt_ft5x06_of_match[] = {
1252 { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
1253 { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
1254 { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
1255 { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
1256 { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
1257 /* Note focaltech vendor prefix for compatibility with ft6236.c */
1258 { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
1259 { /* sentinel */ }
1260 };
1261 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1262
1263 static struct i2c_driver edt_ft5x06_ts_driver = {
1264 .driver = {
1265 .name = "edt_ft5x06",
1266 .of_match_table = edt_ft5x06_of_match,
1267 .pm = &edt_ft5x06_ts_pm_ops,
1268 },
1269 .id_table = edt_ft5x06_ts_id,
1270 .probe = edt_ft5x06_ts_probe,
1271 .remove = edt_ft5x06_ts_remove,
1272 };
1273
1274 module_i2c_driver(edt_ft5x06_ts_driver);
1275
1276 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1277 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1278 MODULE_LICENSE("GPL v2");
1279