drivers/input/touchscreen/edt-ft5x06.c

   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         u8 buf[2] = { 0xfc, 0x00 };
1045         struct input_dev *input;
1046         unsigned long irq_flags;
1047         int error;
1048         char fw_version[EDT_NAME_LEN];
1049
1050         dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
1051
1052         tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
1053         if (!tsdata) {
1054                 dev_err(&client->dev, "failed to allocate driver data.\n");
1055                 return -ENOMEM;
1056         }
1057
1058         chip_data = device_get_match_data(&client->dev);
1059         if (!chip_data)
1060                 chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
1061         if (!chip_data || !chip_data->max_support_points) {
1062                 dev_err(&client->dev, "invalid or missing chip data\n");
1063                 return -EINVAL;
1064         }
1065
1066         tsdata->max_support_points = chip_data->max_support_points;
1067
1068         tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
1069                                                      "reset", GPIOD_OUT_HIGH);
1070         if (IS_ERR(tsdata->reset_gpio)) {
1071                 error = PTR_ERR(tsdata->reset_gpio);
1072                 dev_err(&client->dev,
1073                         "Failed to request GPIO reset pin, error %d\n", error);
1074                 return error;
1075         }
1076
1077         tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
1078                                                     "wake", GPIOD_OUT_LOW);
1079         if (IS_ERR(tsdata->wake_gpio)) {
1080                 error = PTR_ERR(tsdata->wake_gpio);
1081                 dev_err(&client->dev,
1082                         "Failed to request GPIO wake pin, error %d\n", error);
1083                 return error;
1084         }
1085
1086         if (tsdata->wake_gpio) {
1087                 usleep_range(5000, 6000);
1088                 gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
1089         }
1090
1091         if (tsdata->reset_gpio) {
1092                 usleep_range(5000, 6000);
1093                 gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
1094                 msleep(300);
1095         }
1096
1097         input = devm_input_allocate_device(&client->dev);
1098         if (!input) {
1099                 dev_err(&client->dev, "failed to allocate input device.\n");
1100                 return -ENOMEM;
1101         }
1102
1103         mutex_init(&tsdata->mutex);
1104         tsdata->client = client;
1105         tsdata->input = input;
1106         tsdata->factory_mode = false;
1107
1108         error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
1109         if (error) {
1110                 dev_err(&client->dev, "touchscreen probe failed\n");
1111                 return error;
1112         }
1113
1114         /*
1115          * Dummy read access. EP0700MLP1 returns bogus data on the first
1116          * register read access and ignores writes.
1117          */
1118         edt_ft5x06_ts_readwrite(tsdata->client, 2, buf, 2, buf);
1119
1120         edt_ft5x06_ts_set_regs(tsdata);
1121         edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
1122         edt_ft5x06_ts_get_parameters(tsdata);
1123
1124         dev_dbg(&client->dev,
1125                 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
1126                 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
1127
1128         input->name = tsdata->name;
1129         input->id.bustype = BUS_I2C;
1130         input->dev.parent = &client->dev;
1131
1132         if (tsdata->version == EDT_M06 ||
1133             tsdata->version == EDT_M09 ||
1134             tsdata->version == EDT_M12) {
1135                 input_set_abs_params(input, ABS_MT_POSITION_X,
1136                                      0, tsdata->num_x * 64 - 1, 0, 0);
1137                 input_set_abs_params(input, ABS_MT_POSITION_Y,
1138                                      0, tsdata->num_y * 64 - 1, 0, 0);
1139         } else {
1140                 /* Unknown maximum values. Specify via devicetree */
1141                 input_set_abs_params(input, ABS_MT_POSITION_X,
1142                                      0, 65535, 0, 0);
1143                 input_set_abs_params(input, ABS_MT_POSITION_Y,
1144                                      0, 65535, 0, 0);
1145         }
1146
1147         touchscreen_parse_properties(input, true, &tsdata->prop);
1148
1149         error = input_mt_init_slots(input, tsdata->max_support_points,
1150                                 INPUT_MT_DIRECT);
1151         if (error) {
1152                 dev_err(&client->dev, "Unable to init MT slots.\n");
1153                 return error;
1154         }
1155
1156         i2c_set_clientdata(client, tsdata);
1157
1158         irq_flags = irq_get_trigger_type(client->irq);
1159         if (irq_flags == IRQF_TRIGGER_NONE)
1160                 irq_flags = IRQF_TRIGGER_FALLING;
1161         irq_flags |= IRQF_ONESHOT;
1162
1163         error = devm_request_threaded_irq(&client->dev, client->irq,
1164                                         NULL, edt_ft5x06_ts_isr, irq_flags,
1165                                         client->name, tsdata);
1166         if (error) {
1167                 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
1168                 return error;
1169         }
1170
1171         error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group);
1172         if (error)
1173                 return error;
1174
1175         error = input_register_device(input);
1176         if (error)
1177                 return error;
1178
1179         edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1180         device_init_wakeup(&client->dev, 1);
1181
1182         dev_dbg(&client->dev,
1183                 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1184                 client->irq,
1185                 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1,
1186                 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
1187
1188         return 0;
1189 }
1190
1191 static int edt_ft5x06_ts_remove(struct i2c_client *client)
1192 {
1193         struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1194
1195         edt_ft5x06_ts_teardown_debugfs(tsdata);
1196
1197         return 0;
1198 }
1199
1200 static int __maybe_unused edt_ft5x06_ts_suspend(struct device *dev)
1201 {
1202         struct i2c_client *client = to_i2c_client(dev);
1203
1204         if (device_may_wakeup(dev))
1205                 enable_irq_wake(client->irq);
1206
1207         return 0;
1208 }
1209
1210 static int __maybe_unused edt_ft5x06_ts_resume(struct device *dev)
1211 {
1212         struct i2c_client *client = to_i2c_client(dev);
1213
1214         if (device_may_wakeup(dev))
1215                 disable_irq_wake(client->irq);
1216
1217         return 0;
1218 }
1219
1220 static SIMPLE_DEV_PM_OPS(edt_ft5x06_ts_pm_ops,
1221                          edt_ft5x06_ts_suspend, edt_ft5x06_ts_resume);
1222
1223 static const struct edt_i2c_chip_data edt_ft5x06_data = {
1224         .max_support_points = 5,
1225 };
1226
1227 static const struct edt_i2c_chip_data edt_ft5506_data = {
1228         .max_support_points = 10,
1229 };
1230
1231 static const struct edt_i2c_chip_data edt_ft6236_data = {
1232         .max_support_points = 2,
1233 };
1234
1235 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1236         { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
1237         { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
1238         { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data },
1239         /* Note no edt- prefix for compatibility with the ft6236.c driver */
1240         { .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
1241         { /* sentinel */ }
1242 };
1243 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1244
1245 static const struct of_device_id edt_ft5x06_of_match[] = {
1246         { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
1247         { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
1248         { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
1249         { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
1250         { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
1251         /* Note focaltech vendor prefix for compatibility with ft6236.c */
1252         { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
1253         { /* sentinel */ }
1254 };
1255 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1256
1257 static struct i2c_driver edt_ft5x06_ts_driver = {
1258         .driver = {
1259                 .name = "edt_ft5x06",
1260                 .of_match_table = edt_ft5x06_of_match,
1261                 .pm = &edt_ft5x06_ts_pm_ops,
1262         },
1263         .id_table = edt_ft5x06_ts_id,
1264         .probe    = edt_ft5x06_ts_probe,
1265         .remove   = edt_ft5x06_ts_remove,
1266 };
1267
1268 module_i2c_driver(edt_ft5x06_ts_driver);
1269
1270 MODULE_AUTHOR("Simon Budig <simon.budig@kernelconcepts.de>");
1271 MODULE_DESCRIPTION("EDT FT5x06 I2C Touchscreen Driver");
1272 MODULE_LICENSE("GPL v2");