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/debugfs.h>
  17 #include <linux/delay.h>
  18 #include <linux/gpio/consumer.h>
  19 #include <linux/i2c.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/input.h>
  22 #include <linux/input/mt.h>
  23 #include <linux/input/touchscreen.h>
  24 #include <linux/irq.h>
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/ratelimit.h>
  28 #include <linux/regulator/consumer.h>
  29 #include <linux/slab.h>
  30 #include <linux/uaccess.h>
  31
  32 #include <asm/unaligned.h>
  33
  34 #define WORK_REGISTER_THRESHOLD         0x00
  35 #define WORK_REGISTER_REPORT_RATE       0x08
  36 #define WORK_REGISTER_GAIN              0x30
  37 #define WORK_REGISTER_OFFSET            0x31
  38 #define WORK_REGISTER_NUM_X             0x33
  39 #define WORK_REGISTER_NUM_Y             0x34
  40
  41 #define M09_REGISTER_THRESHOLD          0x80
  42 #define M09_REGISTER_GAIN               0x92
  43 #define M09_REGISTER_OFFSET             0x93
  44 #define M09_REGISTER_NUM_X              0x94
  45 #define M09_REGISTER_NUM_Y              0x95
  46
  47 #define EV_REGISTER_THRESHOLD           0x40
  48 #define EV_REGISTER_GAIN                0x41
  49 #define EV_REGISTER_OFFSET_Y            0x45
  50 #define EV_REGISTER_OFFSET_X            0x46
  51
  52 #define NO_REGISTER                     0xff
  53
  54 #define WORK_REGISTER_OPMODE            0x3c
  55 #define FACTORY_REGISTER_OPMODE         0x01
  56
  57 #define TOUCH_EVENT_DOWN                0x00
  58 #define TOUCH_EVENT_UP                  0x01
  59 #define TOUCH_EVENT_ON                  0x02
  60 #define TOUCH_EVENT_RESERVED            0x03
  61
  62 #define EDT_NAME_LEN                    23
  63 #define EDT_SWITCH_MODE_RETRIES         10
  64 #define EDT_SWITCH_MODE_DELAY           5 /* msec */
  65 #define EDT_RAW_DATA_RETRIES            100
  66 #define EDT_RAW_DATA_DELAY              1000 /* usec */
  67
  68 enum edt_ver {
  69         EDT_M06,
  70         EDT_M09,
  71         EDT_M12,
  72         EV_FT,
  73         GENERIC_FT,
  74 };
  75
  76 struct edt_reg_addr {
  77         int reg_threshold;
  78         int reg_report_rate;
  79         int reg_gain;
  80         int reg_offset;
  81         int reg_offset_x;
  82         int reg_offset_y;
  83         int reg_num_x;
  84         int reg_num_y;
  85 };
  86
  87 struct edt_ft5x06_ts_data {
  88         struct i2c_client *client;
  89         struct input_dev *input;
  90         struct touchscreen_properties prop;
  91         u16 num_x;
  92         u16 num_y;
  93         struct regulator *vcc;
  94
  95         struct gpio_desc *reset_gpio;
  96         struct gpio_desc *wake_gpio;
  97
  98 #if defined(CONFIG_DEBUG_FS)
  99         struct dentry *debug_dir;
 100         u8 *raw_buffer;
 101         size_t raw_bufsize;
 102 #endif
 103
 104         struct mutex mutex;
 105         bool factory_mode;
 106         int threshold;
 107         int gain;
 108         int offset;
 109         int offset_x;
 110         int offset_y;
 111         int report_rate;
 112         int max_support_points;
 113
 114         char name[EDT_NAME_LEN];
 115
 116         struct edt_reg_addr reg_addr;
 117         enum edt_ver version;
 118 };
 119
 120 struct edt_i2c_chip_data {
 121         int  max_support_points;
 122 };
 123
 124 static int edt_ft5x06_ts_readwrite(struct i2c_client *client,
 125                                    u16 wr_len, u8 *wr_buf,
 126                                    u16 rd_len, u8 *rd_buf)
 127 {
 128         struct i2c_msg wrmsg[2];
 129         int i = 0;
 130         int ret;
 131
 132         if (wr_len) {
 133                 wrmsg[i].addr  = client->addr;
 134                 wrmsg[i].flags = 0;
 135                 wrmsg[i].len = wr_len;
 136                 wrmsg[i].buf = wr_buf;
 137                 i++;
 138         }
 139         if (rd_len) {
 140                 wrmsg[i].addr  = client->addr;
 141                 wrmsg[i].flags = I2C_M_RD;
 142                 wrmsg[i].len = rd_len;
 143                 wrmsg[i].buf = rd_buf;
 144                 i++;
 145         }
 146
 147         ret = i2c_transfer(client->adapter, wrmsg, i);
 148         if (ret < 0)
 149                 return ret;
 150         if (ret != i)
 151                 return -EIO;
 152
 153         return 0;
 154 }
 155
 156 static bool edt_ft5x06_ts_check_crc(struct edt_ft5x06_ts_data *tsdata,
 157                                     u8 *buf, int buflen)
 158 {
 159         int i;
 160         u8 crc = 0;
 161
 162         for (i = 0; i < buflen - 1; i++)
 163                 crc ^= buf[i];
 164
 165         if (crc != buf[buflen-1]) {
 166                 dev_err_ratelimited(&tsdata->client->dev,
 167                                     "crc error: 0x%02x expected, got 0x%02x\n",
 168                                     crc, buf[buflen-1]);
 169                 return false;
 170         }
 171
 172         return true;
 173 }
 174
 175 static irqreturn_t edt_ft5x06_ts_isr(int irq, void *dev_id)
 176 {
 177         struct edt_ft5x06_ts_data *tsdata = dev_id;
 178         struct device *dev = &tsdata->client->dev;
 179         u8 cmd;
 180         u8 rdbuf[63];
 181         int i, type, x, y, id;
 182         int offset, tplen, datalen, crclen;
 183         int error;
 184
 185         switch (tsdata->version) {
 186         case EDT_M06:
 187                 cmd = 0xf9; /* tell the controller to send touch data */
 188                 offset = 5; /* where the actual touch data starts */
 189                 tplen = 4;  /* data comes in so called frames */
 190                 crclen = 1; /* length of the crc data */
 191                 break;
 192
 193         case EDT_M09:
 194         case EDT_M12:
 195         case EV_FT:
 196         case GENERIC_FT:
 197                 cmd = 0x0;
 198                 offset = 3;
 199                 tplen = 6;
 200                 crclen = 0;
 201                 break;
 202
 203         default:
 204                 goto out;
 205         }
 206
 207         memset(rdbuf, 0, sizeof(rdbuf));
 208         datalen = tplen * tsdata->max_support_points + offset + crclen;
 209
 210         error = edt_ft5x06_ts_readwrite(tsdata->client,
 211                                         sizeof(cmd), &cmd,
 212                                         datalen, rdbuf);
 213         if (error) {
 214                 dev_err_ratelimited(dev, "Unable to fetch data, error: %d\n",
 215                                     error);
 216                 goto out;
 217         }
 218
 219         /* M09/M12 does not send header or CRC */
 220         if (tsdata->version == EDT_M06) {
 221                 if (rdbuf[0] != 0xaa || rdbuf[1] != 0xaa ||
 222                         rdbuf[2] != datalen) {
 223                         dev_err_ratelimited(dev,
 224                                         "Unexpected header: %02x%02x%02x!\n",
 225                                         rdbuf[0], rdbuf[1], rdbuf[2]);
 226                         goto out;
 227                 }
 228
 229                 if (!edt_ft5x06_ts_check_crc(tsdata, rdbuf, datalen))
 230                         goto out;
 231         }
 232
 233         for (i = 0; i < tsdata->max_support_points; i++) {
 234                 u8 *buf = &rdbuf[i * tplen + offset];
 235
 236                 type = buf[0] >> 6;
 237                 /* ignore Reserved events */
 238                 if (type == TOUCH_EVENT_RESERVED)
 239                         continue;
 240
 241                 /* M06 sometimes sends bogus coordinates in TOUCH_DOWN */
 242                 if (tsdata->version == EDT_M06 && type == TOUCH_EVENT_DOWN)
 243                         continue;
 244
 245                 x = get_unaligned_be16(buf) & 0x0fff;
 246                 y = get_unaligned_be16(buf + 2) & 0x0fff;
 247                 /* The FT5x26 send the y coordinate first */
 248                 if (tsdata->version == EV_FT)
 249                         swap(x, y);
 250
 251                 id = (buf[2] >> 4) & 0x0f;
 252
 253                 input_mt_slot(tsdata->input, id);
 254                 if (input_mt_report_slot_state(tsdata->input, MT_TOOL_FINGER,
 255                                                type != TOUCH_EVENT_UP))
 256                         touchscreen_report_pos(tsdata->input, &tsdata->prop,
 257                                                x, y, true);
 258         }
 259
 260         input_mt_report_pointer_emulation(tsdata->input, true);
 261         input_sync(tsdata->input);
 262
 263 out:
 264         return IRQ_HANDLED;
 265 }
 266
 267 static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata,
 268                                      u8 addr, u8 value)
 269 {
 270         u8 wrbuf[4];
 271
 272         switch (tsdata->version) {
 273         case EDT_M06:
 274                 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
 275                 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
 276                 wrbuf[2] = value;
 277                 wrbuf[3] = wrbuf[0] ^ wrbuf[1] ^ wrbuf[2];
 278                 return edt_ft5x06_ts_readwrite(tsdata->client, 4,
 279                                         wrbuf, 0, NULL);
 280         /* fallthrough */
 281         case EDT_M09:
 282         case EDT_M12:
 283         case EV_FT:
 284         case GENERIC_FT:
 285                 wrbuf[0] = addr;
 286                 wrbuf[1] = value;
 287
 288                 return edt_ft5x06_ts_readwrite(tsdata->client, 2,
 289                                         wrbuf, 0, NULL);
 290
 291         default:
 292                 return -EINVAL;
 293         }
 294 }
 295
 296 static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,
 297                                     u8 addr)
 298 {
 299         u8 wrbuf[2], rdbuf[2];
 300         int error;
 301
 302         switch (tsdata->version) {
 303         case EDT_M06:
 304                 wrbuf[0] = tsdata->factory_mode ? 0xf3 : 0xfc;
 305                 wrbuf[1] = tsdata->factory_mode ? addr & 0x7f : addr & 0x3f;
 306                 wrbuf[1] |= tsdata->factory_mode ? 0x80 : 0x40;
 307
 308                 error = edt_ft5x06_ts_readwrite(tsdata->client, 2, wrbuf, 2,
 309                                                 rdbuf);
 310                 if (error)
 311                         return error;
 312
 313                 if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {
 314                         dev_err(&tsdata->client->dev,
 315                                 "crc error: 0x%02x expected, got 0x%02x\n",
 316                                 wrbuf[0] ^ wrbuf[1] ^ rdbuf[0],
 317                                 rdbuf[1]);
 318                         return -EIO;
 319                 }
 320                 break;
 321
 322         /* fallthrough */
 323         case EDT_M09:
 324         case EDT_M12:
 325         case EV_FT:
 326         case GENERIC_FT:
 327                 wrbuf[0] = addr;
 328                 error = edt_ft5x06_ts_readwrite(tsdata->client, 1,
 329                                                 wrbuf, 1, rdbuf);
 330                 if (error)
 331                         return error;
 332                 break;
 333
 334         default:
 335                 return -EINVAL;
 336         }
 337
 338         return rdbuf[0];
 339 }
 340
 341 struct edt_ft5x06_attribute {
 342         struct device_attribute dattr;
 343         size_t field_offset;
 344         u8 limit_low;
 345         u8 limit_high;
 346         u8 addr_m06;
 347         u8 addr_m09;
 348         u8 addr_ev;
 349 };
 350
 351 #define EDT_ATTR(_field, _mode, _addr_m06, _addr_m09, _addr_ev,         \
 352                 _limit_low, _limit_high)                                \
 353         struct edt_ft5x06_attribute edt_ft5x06_attr_##_field = {        \
 354                 .dattr = __ATTR(_field, _mode,                          \
 355                                 edt_ft5x06_setting_show,                \
 356                                 edt_ft5x06_setting_store),              \
 357                 .field_offset = offsetof(struct edt_ft5x06_ts_data, _field), \
 358                 .addr_m06 = _addr_m06,                                  \
 359                 .addr_m09 = _addr_m09,                                  \
 360                 .addr_ev  = _addr_ev,                                   \
 361                 .limit_low = _limit_low,                                \
 362                 .limit_high = _limit_high,                              \
 363         }
 364
 365 static ssize_t edt_ft5x06_setting_show(struct device *dev,
 366                                        struct device_attribute *dattr,
 367                                        char *buf)
 368 {
 369         struct i2c_client *client = to_i2c_client(dev);
 370         struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
 371         struct edt_ft5x06_attribute *attr =
 372                         container_of(dattr, struct edt_ft5x06_attribute, dattr);
 373         u8 *field = (u8 *)tsdata + attr->field_offset;
 374         int val;
 375         size_t count = 0;
 376         int error = 0;
 377         u8 addr;
 378
 379         mutex_lock(&tsdata->mutex);
 380
 381         if (tsdata->factory_mode) {
 382                 error = -EIO;
 383                 goto out;
 384         }
 385
 386         switch (tsdata->version) {
 387         case EDT_M06:
 388                 addr = attr->addr_m06;
 389                 break;
 390
 391         case EDT_M09:
 392         case EDT_M12:
 393         case GENERIC_FT:
 394                 addr = attr->addr_m09;
 395                 break;
 396
 397         case EV_FT:
 398                 addr = attr->addr_ev;
 399                 break;
 400
 401         default:
 402                 error = -ENODEV;
 403                 goto out;
 404         }
 405
 406         if (addr != NO_REGISTER) {
 407                 val = edt_ft5x06_register_read(tsdata, addr);
 408                 if (val < 0) {
 409                         error = val;
 410                         dev_err(&tsdata->client->dev,
 411                                 "Failed to fetch attribute %s, error %d\n",
 412                                 dattr->attr.name, error);
 413                         goto out;
 414                 }
 415         } else {
 416                 val = *field;
 417         }
 418
 419         if (val != *field) {
 420                 dev_warn(&tsdata->client->dev,
 421                          "%s: read (%d) and stored value (%d) differ\n",
 422                          dattr->attr.name, val, *field);
 423                 *field = val;
 424         }
 425
 426         count = scnprintf(buf, PAGE_SIZE, "%d\n", val);
 427 out:
 428         mutex_unlock(&tsdata->mutex);
 429         return error ?: count;
 430 }
 431
 432 static ssize_t edt_ft5x06_setting_store(struct device *dev,
 433                                         struct device_attribute *dattr,
 434                                         const char *buf, size_t count)
 435 {
 436         struct i2c_client *client = to_i2c_client(dev);
 437         struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
 438         struct edt_ft5x06_attribute *attr =
 439                         container_of(dattr, struct edt_ft5x06_attribute, dattr);
 440         u8 *field = (u8 *)tsdata + attr->field_offset;
 441         unsigned int val;
 442         int error;
 443         u8 addr;
 444
 445         mutex_lock(&tsdata->mutex);
 446
 447         if (tsdata->factory_mode) {
 448                 error = -EIO;
 449                 goto out;
 450         }
 451
 452         error = kstrtouint(buf, 0, &val);
 453         if (error)
 454                 goto out;
 455
 456         if (val < attr->limit_low || val > attr->limit_high) {
 457                 error = -ERANGE;
 458                 goto out;
 459         }
 460
 461         switch (tsdata->version) {
 462         case EDT_M06:
 463                 addr = attr->addr_m06;
 464                 break;
 465
 466         case EDT_M09:
 467         case EDT_M12:
 468         case GENERIC_FT:
 469                 addr = attr->addr_m09;
 470                 break;
 471
 472         case EV_FT:
 473                 addr = attr->addr_ev;
 474                 break;
 475
 476         default:
 477                 error = -ENODEV;
 478                 goto out;
 479         }
 480
 481         if (addr != NO_REGISTER) {
 482                 error = edt_ft5x06_register_write(tsdata, addr, val);
 483                 if (error) {
 484                         dev_err(&tsdata->client->dev,
 485                                 "Failed to update attribute %s, error: %d\n",
 486                                 dattr->attr.name, error);
 487                         goto out;
 488                 }
 489         }
 490         *field = val;
 491
 492 out:
 493         mutex_unlock(&tsdata->mutex);
 494         return error ?: count;
 495 }
 496
 497 /* m06, m09: range 0-31, m12: range 0-5 */
 498 static EDT_ATTR(gain, S_IWUSR | S_IRUGO, WORK_REGISTER_GAIN,
 499                 M09_REGISTER_GAIN, EV_REGISTER_GAIN, 0, 31);
 500 /* m06, m09: range 0-31, m12: range 0-16 */
 501 static EDT_ATTR(offset, S_IWUSR | S_IRUGO, WORK_REGISTER_OFFSET,
 502                 M09_REGISTER_OFFSET, NO_REGISTER, 0, 31);
 503 /* m06, m09, m12: no supported, ev_ft: range 0-80 */
 504 static EDT_ATTR(offset_x, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
 505                 EV_REGISTER_OFFSET_X, 0, 80);
 506 /* m06, m09, m12: no supported, ev_ft: range 0-80 */
 507 static EDT_ATTR(offset_y, S_IWUSR | S_IRUGO, NO_REGISTER, NO_REGISTER,
 508                 EV_REGISTER_OFFSET_Y, 0, 80);
 509 /* m06: range 20 to 80, m09: range 0 to 30, m12: range 1 to 255... */
 510 static EDT_ATTR(threshold, S_IWUSR | S_IRUGO, WORK_REGISTER_THRESHOLD,
 511                 M09_REGISTER_THRESHOLD, EV_REGISTER_THRESHOLD, 0, 255);
 512 /* m06: range 3 to 14, m12: (0x64: 100Hz) */
 513 static EDT_ATTR(report_rate, S_IWUSR | S_IRUGO, WORK_REGISTER_REPORT_RATE,
 514                 NO_REGISTER, NO_REGISTER, 0, 255);
 515
 516 static struct attribute *edt_ft5x06_attrs[] = {
 517         &edt_ft5x06_attr_gain.dattr.attr,
 518         &edt_ft5x06_attr_offset.dattr.attr,
 519         &edt_ft5x06_attr_offset_x.dattr.attr,
 520         &edt_ft5x06_attr_offset_y.dattr.attr,
 521         &edt_ft5x06_attr_threshold.dattr.attr,
 522         &edt_ft5x06_attr_report_rate.dattr.attr,
 523         NULL
 524 };
 525
 526 static const struct attribute_group edt_ft5x06_attr_group = {
 527         .attrs = edt_ft5x06_attrs,
 528 };
 529
 530 #ifdef CONFIG_DEBUG_FS
 531 static int edt_ft5x06_factory_mode(struct edt_ft5x06_ts_data *tsdata)
 532 {
 533         struct i2c_client *client = tsdata->client;
 534         int retries = EDT_SWITCH_MODE_RETRIES;
 535         int ret;
 536         int error;
 537
 538         if (tsdata->version != EDT_M06) {
 539                 dev_err(&client->dev,
 540                         "No factory mode support for non-M06 devices\n");
 541                 return -EINVAL;
 542         }
 543
 544         disable_irq(client->irq);
 545
 546         if (!tsdata->raw_buffer) {
 547                 tsdata->raw_bufsize = tsdata->num_x * tsdata->num_y *
 548                                       sizeof(u16);
 549                 tsdata->raw_buffer = kzalloc(tsdata->raw_bufsize, GFP_KERNEL);
 550                 if (!tsdata->raw_buffer) {
 551                         error = -ENOMEM;
 552                         goto err_out;
 553                 }
 554         }
 555
 556         /* mode register is 0x3c when in the work mode */
 557         error = edt_ft5x06_register_write(tsdata, WORK_REGISTER_OPMODE, 0x03);
 558         if (error) {
 559                 dev_err(&client->dev,
 560                         "failed to switch to factory mode, error %d\n", error);
 561                 goto err_out;
 562         }
 563
 564         tsdata->factory_mode = true;
 565         do {
 566                 mdelay(EDT_SWITCH_MODE_DELAY);
 567                 /* mode register is 0x01 when in factory mode */
 568                 ret = edt_ft5x06_register_read(tsdata, FACTORY_REGISTER_OPMODE);
 569                 if (ret == 0x03)
 570                         break;
 571         } while (--retries > 0);
 572
 573         if (retries == 0) {
 574                 dev_err(&client->dev, "not in factory mode after %dms.\n",
 575                         EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
 576                 error = -EIO;
 577                 goto err_out;
 578         }
 579
 580         return 0;
 581
 582 err_out:
 583         kfree(tsdata->raw_buffer);
 584         tsdata->raw_buffer = NULL;
 585         tsdata->factory_mode = false;
 586         enable_irq(client->irq);
 587
 588         return error;
 589 }
 590
 591 static int edt_ft5x06_work_mode(struct edt_ft5x06_ts_data *tsdata)
 592 {
 593         struct i2c_client *client = tsdata->client;
 594         int retries = EDT_SWITCH_MODE_RETRIES;
 595         struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
 596         int ret;
 597         int error;
 598
 599         /* mode register is 0x01 when in the factory mode */
 600         error = edt_ft5x06_register_write(tsdata, FACTORY_REGISTER_OPMODE, 0x1);
 601         if (error) {
 602                 dev_err(&client->dev,
 603                         "failed to switch to work mode, error: %d\n", error);
 604                 return error;
 605         }
 606
 607         tsdata->factory_mode = false;
 608
 609         do {
 610                 mdelay(EDT_SWITCH_MODE_DELAY);
 611                 /* mode register is 0x01 when in factory mode */
 612                 ret = edt_ft5x06_register_read(tsdata, WORK_REGISTER_OPMODE);
 613                 if (ret == 0x01)
 614                         break;
 615         } while (--retries > 0);
 616
 617         if (retries == 0) {
 618                 dev_err(&client->dev, "not in work mode after %dms.\n",
 619                         EDT_SWITCH_MODE_RETRIES * EDT_SWITCH_MODE_DELAY);
 620                 tsdata->factory_mode = true;
 621                 return -EIO;
 622         }
 623
 624         kfree(tsdata->raw_buffer);
 625         tsdata->raw_buffer = NULL;
 626
 627         /* restore parameters */
 628         edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold,
 629                                   tsdata->threshold);
 630         edt_ft5x06_register_write(tsdata, reg_addr->reg_gain,
 631                                   tsdata->gain);
 632         if (reg_addr->reg_offset != NO_REGISTER)
 633                 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset,
 634                                           tsdata->offset);
 635         if (reg_addr->reg_offset_x != NO_REGISTER)
 636                 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x,
 637                                           tsdata->offset_x);
 638         if (reg_addr->reg_offset_y != NO_REGISTER)
 639                 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y,
 640                                           tsdata->offset_y);
 641         if (reg_addr->reg_report_rate != NO_REGISTER)
 642                 edt_ft5x06_register_write(tsdata, reg_addr->reg_report_rate,
 643                                   tsdata->report_rate);
 644
 645         enable_irq(client->irq);
 646
 647         return 0;
 648 }
 649
 650 static int edt_ft5x06_debugfs_mode_get(void *data, u64 *mode)
 651 {
 652         struct edt_ft5x06_ts_data *tsdata = data;
 653
 654         *mode = tsdata->factory_mode;
 655
 656         return 0;
 657 };
 658
 659 static int edt_ft5x06_debugfs_mode_set(void *data, u64 mode)
 660 {
 661         struct edt_ft5x06_ts_data *tsdata = data;
 662         int retval = 0;
 663
 664         if (mode > 1)
 665                 return -ERANGE;
 666
 667         mutex_lock(&tsdata->mutex);
 668
 669         if (mode != tsdata->factory_mode) {
 670                 retval = mode ? edt_ft5x06_factory_mode(tsdata) :
 671                                 edt_ft5x06_work_mode(tsdata);
 672         }
 673
 674         mutex_unlock(&tsdata->mutex);
 675
 676         return retval;
 677 };
 678
 679 DEFINE_SIMPLE_ATTRIBUTE(debugfs_mode_fops, edt_ft5x06_debugfs_mode_get,
 680                         edt_ft5x06_debugfs_mode_set, "%llu\n");
 681
 682 static ssize_t edt_ft5x06_debugfs_raw_data_read(struct file *file,
 683                                 char __user *buf, size_t count, loff_t *off)
 684 {
 685         struct edt_ft5x06_ts_data *tsdata = file->private_data;
 686         struct i2c_client *client = tsdata->client;
 687         int retries  = EDT_RAW_DATA_RETRIES;
 688         int val, i, error;
 689         size_t read = 0;
 690         int colbytes;
 691         char wrbuf[3];
 692         u8 *rdbuf;
 693
 694         if (*off < 0 || *off >= tsdata->raw_bufsize)
 695                 return 0;
 696
 697         mutex_lock(&tsdata->mutex);
 698
 699         if (!tsdata->factory_mode || !tsdata->raw_buffer) {
 700                 error = -EIO;
 701                 goto out;
 702         }
 703
 704         error = edt_ft5x06_register_write(tsdata, 0x08, 0x01);
 705         if (error) {
 706                 dev_dbg(&client->dev,
 707                         "failed to write 0x08 register, error %d\n", error);
 708                 goto out;
 709         }
 710
 711         do {
 712                 usleep_range(EDT_RAW_DATA_DELAY, EDT_RAW_DATA_DELAY + 100);
 713                 val = edt_ft5x06_register_read(tsdata, 0x08);
 714                 if (val < 1)
 715                         break;
 716         } while (--retries > 0);
 717
 718         if (val < 0) {
 719                 error = val;
 720                 dev_dbg(&client->dev,
 721                         "failed to read 0x08 register, error %d\n", error);
 722                 goto out;
 723         }
 724
 725         if (retries == 0) {
 726                 dev_dbg(&client->dev,
 727                         "timed out waiting for register to settle\n");
 728                 error = -ETIMEDOUT;
 729                 goto out;
 730         }
 731
 732         rdbuf = tsdata->raw_buffer;
 733         colbytes = tsdata->num_y * sizeof(u16);
 734
 735         wrbuf[0] = 0xf5;
 736         wrbuf[1] = 0x0e;
 737         for (i = 0; i < tsdata->num_x; i++) {
 738                 wrbuf[2] = i;  /* column index */
 739                 error = edt_ft5x06_ts_readwrite(tsdata->client,
 740                                                 sizeof(wrbuf), wrbuf,
 741                                                 colbytes, rdbuf);
 742                 if (error)
 743                         goto out;
 744
 745                 rdbuf += colbytes;
 746         }
 747
 748         read = min_t(size_t, count, tsdata->raw_bufsize - *off);
 749         if (copy_to_user(buf, tsdata->raw_buffer + *off, read)) {
 750                 error = -EFAULT;
 751                 goto out;
 752         }
 753
 754         *off += read;
 755 out:
 756         mutex_unlock(&tsdata->mutex);
 757         return error ?: read;
 758 };
 759
 760 static const struct file_operations debugfs_raw_data_fops = {
 761         .open = simple_open,
 762         .read = edt_ft5x06_debugfs_raw_data_read,
 763 };
 764
 765 static void
 766 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
 767                               const char *debugfs_name)
 768 {
 769         tsdata->debug_dir = debugfs_create_dir(debugfs_name, NULL);
 770
 771         debugfs_create_u16("num_x", S_IRUSR, tsdata->debug_dir, &tsdata->num_x);
 772         debugfs_create_u16("num_y", S_IRUSR, tsdata->debug_dir, &tsdata->num_y);
 773
 774         debugfs_create_file("mode", S_IRUSR | S_IWUSR,
 775                             tsdata->debug_dir, tsdata, &debugfs_mode_fops);
 776         debugfs_create_file("raw_data", S_IRUSR,
 777                             tsdata->debug_dir, tsdata, &debugfs_raw_data_fops);
 778 }
 779
 780 static void
 781 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
 782 {
 783         debugfs_remove_recursive(tsdata->debug_dir);
 784         kfree(tsdata->raw_buffer);
 785 }
 786
 787 #else
 788
 789 static inline void
 790 edt_ft5x06_ts_prepare_debugfs(struct edt_ft5x06_ts_data *tsdata,
 791                               const char *debugfs_name)
 792 {
 793 }
 794
 795 static inline void
 796 edt_ft5x06_ts_teardown_debugfs(struct edt_ft5x06_ts_data *tsdata)
 797 {
 798 }
 799
 800 #endif /* CONFIG_DEBUGFS */
 801
 802 static int edt_ft5x06_ts_identify(struct i2c_client *client,
 803                                         struct edt_ft5x06_ts_data *tsdata,
 804                                         char *fw_version)
 805 {
 806         u8 rdbuf[EDT_NAME_LEN];
 807         char *p;
 808         int error;
 809         char *model_name = tsdata->name;
 810
 811         /* see what we find if we assume it is a M06 *
 812          * if we get less than EDT_NAME_LEN, we don't want
 813          * to have garbage in there
 814          */
 815         memset(rdbuf, 0, sizeof(rdbuf));
 816         error = edt_ft5x06_ts_readwrite(client, 1, "\xBB",
 817                                         EDT_NAME_LEN - 1, rdbuf);
 818         if (error)
 819                 return error;
 820
 821         /* Probe content for something consistent.
 822          * M06 starts with a response byte, M12 gives the data directly.
 823          * M09/Generic does not provide model number information.
 824          */
 825         if (!strncasecmp(rdbuf + 1, "EP0", 3)) {
 826                 tsdata->version = EDT_M06;
 827
 828                 /* remove last '$' end marker */
 829                 rdbuf[EDT_NAME_LEN - 1] = '\0';
 830                 if (rdbuf[EDT_NAME_LEN - 2] == '$')
 831                         rdbuf[EDT_NAME_LEN - 2] = '\0';
 832
 833                 /* look for Model/Version separator */
 834                 p = strchr(rdbuf, '*');
 835                 if (p)
 836                         *p++ = '\0';
 837                 strlcpy(model_name, rdbuf + 1, EDT_NAME_LEN);
 838                 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
 839         } else if (!strncasecmp(rdbuf, "EP0", 3)) {
 840                 tsdata->version = EDT_M12;
 841
 842                 /* remove last '$' end marker */
 843                 rdbuf[EDT_NAME_LEN - 2] = '\0';
 844                 if (rdbuf[EDT_NAME_LEN - 3] == '$')
 845                         rdbuf[EDT_NAME_LEN - 3] = '\0';
 846
 847                 /* look for Model/Version separator */
 848                 p = strchr(rdbuf, '*');
 849                 if (p)
 850                         *p++ = '\0';
 851                 strlcpy(model_name, rdbuf, EDT_NAME_LEN);
 852                 strlcpy(fw_version, p ? p : "", EDT_NAME_LEN);
 853         } else {
 854                 /* If it is not an EDT M06/M12 touchscreen, then the model
 855                  * detection is a bit hairy. The different ft5x06
 856                  * firmares around don't reliably implement the
 857                  * identification registers. Well, we'll take a shot.
 858                  *
 859                  * The main difference between generic focaltec based
 860                  * touches and EDT M09 is that we know how to retrieve
 861                  * the max coordinates for the latter.
 862                  */
 863                 tsdata->version = GENERIC_FT;
 864
 865                 error = edt_ft5x06_ts_readwrite(client, 1, "\xA6",
 866                                                 2, rdbuf);
 867                 if (error)
 868                         return error;
 869
 870                 strlcpy(fw_version, rdbuf, 2);
 871
 872                 error = edt_ft5x06_ts_readwrite(client, 1, "\xA8",
 873                                                 1, rdbuf);
 874                 if (error)
 875                         return error;
 876
 877                 /* This "model identification" is not exact. Unfortunately
 878                  * not all firmwares for the ft5x06 put useful values in
 879                  * the identification registers.
 880                  */
 881                 switch (rdbuf[0]) {
 882                 case 0x35:   /* EDT EP0350M09 */
 883                 case 0x43:   /* EDT EP0430M09 */
 884                 case 0x50:   /* EDT EP0500M09 */
 885                 case 0x57:   /* EDT EP0570M09 */
 886                 case 0x70:   /* EDT EP0700M09 */
 887                         tsdata->version = EDT_M09;
 888                         snprintf(model_name, EDT_NAME_LEN, "EP0%i%i0M09",
 889                                 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
 890                         break;
 891                 case 0xa1:   /* EDT EP1010ML00 */
 892                         tsdata->version = EDT_M09;
 893                         snprintf(model_name, EDT_NAME_LEN, "EP%i%i0ML00",
 894                                 rdbuf[0] >> 4, rdbuf[0] & 0x0F);
 895                         break;
 896                 case 0x5a:   /* Solomon Goldentek Display */
 897                         snprintf(model_name, EDT_NAME_LEN, "GKTW50SCED1R0");
 898                         break;
 899                 case 0x59:  /* Evervision Display with FT5xx6 TS */
 900                         tsdata->version = EV_FT;
 901                         error = edt_ft5x06_ts_readwrite(client, 1, "\x53",
 902                                                         1, rdbuf);
 903                         if (error)
 904                                 return error;
 905                         strlcpy(fw_version, rdbuf, 1);
 906                         snprintf(model_name, EDT_NAME_LEN,
 907                                  "EVERVISION-FT5726NEi");
 908                         break;
 909                 default:
 910                         snprintf(model_name, EDT_NAME_LEN,
 911                                  "generic ft5x06 (%02x)",
 912                                  rdbuf[0]);
 913                         break;
 914                 }
 915         }
 916
 917         return 0;
 918 }
 919
 920 static void edt_ft5x06_ts_get_defaults(struct device *dev,
 921                                        struct edt_ft5x06_ts_data *tsdata)
 922 {
 923         struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
 924         u32 val;
 925         int error;
 926
 927         error = device_property_read_u32(dev, "threshold", &val);
 928         if (!error) {
 929                 edt_ft5x06_register_write(tsdata, reg_addr->reg_threshold, val);
 930                 tsdata->threshold = val;
 931         }
 932
 933         error = device_property_read_u32(dev, "gain", &val);
 934         if (!error) {
 935                 edt_ft5x06_register_write(tsdata, reg_addr->reg_gain, val);
 936                 tsdata->gain = val;
 937         }
 938
 939         error = device_property_read_u32(dev, "offset", &val);
 940         if (!error) {
 941                 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset, val);
 942                 tsdata->offset = val;
 943         }
 944
 945         error = device_property_read_u32(dev, "offset-x", &val);
 946         if (!error) {
 947                 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_x, val);
 948                 tsdata->offset_x = val;
 949         }
 950
 951         error = device_property_read_u32(dev, "offset-y", &val);
 952         if (!error) {
 953                 edt_ft5x06_register_write(tsdata, reg_addr->reg_offset_y, val);
 954                 tsdata->offset_y = val;
 955         }
 956 }
 957
 958 static void
 959 edt_ft5x06_ts_get_parameters(struct edt_ft5x06_ts_data *tsdata)
 960 {
 961         struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
 962
 963         tsdata->threshold = edt_ft5x06_register_read(tsdata,
 964                                                      reg_addr->reg_threshold);
 965         tsdata->gain = edt_ft5x06_register_read(tsdata, reg_addr->reg_gain);
 966         if (reg_addr->reg_offset != NO_REGISTER)
 967                 tsdata->offset =
 968                         edt_ft5x06_register_read(tsdata, reg_addr->reg_offset);
 969         if (reg_addr->reg_offset_x != NO_REGISTER)
 970                 tsdata->offset_x = edt_ft5x06_register_read(tsdata,
 971                                                 reg_addr->reg_offset_x);
 972         if (reg_addr->reg_offset_y != NO_REGISTER)
 973                 tsdata->offset_y = edt_ft5x06_register_read(tsdata,
 974                                                 reg_addr->reg_offset_y);
 975         if (reg_addr->reg_report_rate != NO_REGISTER)
 976                 tsdata->report_rate = edt_ft5x06_register_read(tsdata,
 977                                                 reg_addr->reg_report_rate);
 978         if (tsdata->version == EDT_M06 ||
 979             tsdata->version == EDT_M09 ||
 980             tsdata->version == EDT_M12) {
 981                 tsdata->num_x = edt_ft5x06_register_read(tsdata,
 982                                                          reg_addr->reg_num_x);
 983                 tsdata->num_y = edt_ft5x06_register_read(tsdata,
 984                                                          reg_addr->reg_num_y);
 985         } else {
 986                 tsdata->num_x = -1;
 987                 tsdata->num_y = -1;
 988         }
 989 }
 990
 991 static void
 992 edt_ft5x06_ts_set_regs(struct edt_ft5x06_ts_data *tsdata)
 993 {
 994         struct edt_reg_addr *reg_addr = &tsdata->reg_addr;
 995
 996         switch (tsdata->version) {
 997         case EDT_M06:
 998                 reg_addr->reg_threshold = WORK_REGISTER_THRESHOLD;
 999                 reg_addr->reg_report_rate = WORK_REGISTER_REPORT_RATE;
1000                 reg_addr->reg_gain = WORK_REGISTER_GAIN;
1001                 reg_addr->reg_offset = WORK_REGISTER_OFFSET;
1002                 reg_addr->reg_offset_x = NO_REGISTER;
1003                 reg_addr->reg_offset_y = NO_REGISTER;
1004                 reg_addr->reg_num_x = WORK_REGISTER_NUM_X;
1005                 reg_addr->reg_num_y = WORK_REGISTER_NUM_Y;
1006                 break;
1007
1008         case EDT_M09:
1009         case EDT_M12:
1010                 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1011                 reg_addr->reg_report_rate = NO_REGISTER;
1012                 reg_addr->reg_gain = M09_REGISTER_GAIN;
1013                 reg_addr->reg_offset = M09_REGISTER_OFFSET;
1014                 reg_addr->reg_offset_x = NO_REGISTER;
1015                 reg_addr->reg_offset_y = NO_REGISTER;
1016                 reg_addr->reg_num_x = M09_REGISTER_NUM_X;
1017                 reg_addr->reg_num_y = M09_REGISTER_NUM_Y;
1018                 break;
1019
1020         case EV_FT:
1021                 reg_addr->reg_threshold = EV_REGISTER_THRESHOLD;
1022                 reg_addr->reg_gain = EV_REGISTER_GAIN;
1023                 reg_addr->reg_offset = NO_REGISTER;
1024                 reg_addr->reg_offset_x = EV_REGISTER_OFFSET_X;
1025                 reg_addr->reg_offset_y = EV_REGISTER_OFFSET_Y;
1026                 reg_addr->reg_num_x = NO_REGISTER;
1027                 reg_addr->reg_num_y = NO_REGISTER;
1028                 reg_addr->reg_report_rate = NO_REGISTER;
1029                 break;
1030
1031         case GENERIC_FT:
1032                 /* this is a guesswork */
1033                 reg_addr->reg_threshold = M09_REGISTER_THRESHOLD;
1034                 reg_addr->reg_gain = M09_REGISTER_GAIN;
1035                 reg_addr->reg_offset = M09_REGISTER_OFFSET;
1036                 reg_addr->reg_offset_x = NO_REGISTER;
1037                 reg_addr->reg_offset_y = NO_REGISTER;
1038                 break;
1039         }
1040 }
1041
1042 static void edt_ft5x06_disable_regulator(void *arg)
1043 {
1044         struct edt_ft5x06_ts_data *data = arg;
1045
1046         regulator_disable(data->vcc);
1047 }
1048
1049 static int edt_ft5x06_ts_probe(struct i2c_client *client,
1050                                          const struct i2c_device_id *id)
1051 {
1052         const struct edt_i2c_chip_data *chip_data;
1053         struct edt_ft5x06_ts_data *tsdata;
1054         u8 buf[2] = { 0xfc, 0x00 };
1055         struct input_dev *input;
1056         unsigned long irq_flags;
1057         int error;
1058         char fw_version[EDT_NAME_LEN];
1059
1060         dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
1061
1062         tsdata = devm_kzalloc(&client->dev, sizeof(*tsdata), GFP_KERNEL);
1063         if (!tsdata) {
1064                 dev_err(&client->dev, "failed to allocate driver data.\n");
1065                 return -ENOMEM;
1066         }
1067
1068         chip_data = device_get_match_data(&client->dev);
1069         if (!chip_data)
1070                 chip_data = (const struct edt_i2c_chip_data *)id->driver_data;
1071         if (!chip_data || !chip_data->max_support_points) {
1072                 dev_err(&client->dev, "invalid or missing chip data\n");
1073                 return -EINVAL;
1074         }
1075
1076         tsdata->max_support_points = chip_data->max_support_points;
1077
1078         tsdata->vcc = devm_regulator_get(&client->dev, "vcc");
1079         if (IS_ERR(tsdata->vcc)) {
1080                 error = PTR_ERR(tsdata->vcc);
1081                 if (error != -EPROBE_DEFER)
1082                         dev_err(&client->dev,
1083                                 "failed to request regulator: %d\n", error);
1084                 return error;
1085         }
1086
1087         error = regulator_enable(tsdata->vcc);
1088         if (error < 0) {
1089                 dev_err(&client->dev, "failed to enable vcc: %d\n", error);
1090                 return error;
1091         }
1092
1093         error = devm_add_action_or_reset(&client->dev,
1094                                          edt_ft5x06_disable_regulator,
1095                                          tsdata);
1096         if (error)
1097                 return error;
1098
1099         tsdata->reset_gpio = devm_gpiod_get_optional(&client->dev,
1100                                                      "reset", GPIOD_OUT_HIGH);
1101         if (IS_ERR(tsdata->reset_gpio)) {
1102                 error = PTR_ERR(tsdata->reset_gpio);
1103                 dev_err(&client->dev,
1104                         "Failed to request GPIO reset pin, error %d\n", error);
1105                 return error;
1106         }
1107
1108         tsdata->wake_gpio = devm_gpiod_get_optional(&client->dev,
1109                                                     "wake", GPIOD_OUT_LOW);
1110         if (IS_ERR(tsdata->wake_gpio)) {
1111                 error = PTR_ERR(tsdata->wake_gpio);
1112                 dev_err(&client->dev,
1113                         "Failed to request GPIO wake pin, error %d\n", error);
1114                 return error;
1115         }
1116
1117         if (tsdata->wake_gpio) {
1118                 usleep_range(5000, 6000);
1119                 gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
1120         }
1121
1122         if (tsdata->reset_gpio) {
1123                 usleep_range(5000, 6000);
1124                 gpiod_set_value_cansleep(tsdata->reset_gpio, 0);
1125                 msleep(300);
1126         }
1127
1128         input = devm_input_allocate_device(&client->dev);
1129         if (!input) {
1130                 dev_err(&client->dev, "failed to allocate input device.\n");
1131                 return -ENOMEM;
1132         }
1133
1134         mutex_init(&tsdata->mutex);
1135         tsdata->client = client;
1136         tsdata->input = input;
1137         tsdata->factory_mode = false;
1138
1139         error = edt_ft5x06_ts_identify(client, tsdata, fw_version);
1140         if (error) {
1141                 dev_err(&client->dev, "touchscreen probe failed\n");
1142                 return error;
1143         }
1144
1145         /*
1146          * Dummy read access. EP0700MLP1 returns bogus data on the first
1147          * register read access and ignores writes.
1148          */
1149         edt_ft5x06_ts_readwrite(tsdata->client, 2, buf, 2, buf);
1150
1151         edt_ft5x06_ts_set_regs(tsdata);
1152         edt_ft5x06_ts_get_defaults(&client->dev, tsdata);
1153         edt_ft5x06_ts_get_parameters(tsdata);
1154
1155         dev_dbg(&client->dev,
1156                 "Model \"%s\", Rev. \"%s\", %dx%d sensors\n",
1157                 tsdata->name, fw_version, tsdata->num_x, tsdata->num_y);
1158
1159         input->name = tsdata->name;
1160         input->id.bustype = BUS_I2C;
1161         input->dev.parent = &client->dev;
1162
1163         if (tsdata->version == EDT_M06 ||
1164             tsdata->version == EDT_M09 ||
1165             tsdata->version == EDT_M12) {
1166                 input_set_abs_params(input, ABS_MT_POSITION_X,
1167                                      0, tsdata->num_x * 64 - 1, 0, 0);
1168                 input_set_abs_params(input, ABS_MT_POSITION_Y,
1169                                      0, tsdata->num_y * 64 - 1, 0, 0);
1170         } else {
1171                 /* Unknown maximum values. Specify via devicetree */
1172                 input_set_abs_params(input, ABS_MT_POSITION_X,
1173                                      0, 65535, 0, 0);
1174                 input_set_abs_params(input, ABS_MT_POSITION_Y,
1175                                      0, 65535, 0, 0);
1176         }
1177
1178         touchscreen_parse_properties(input, true, &tsdata->prop);
1179
1180         error = input_mt_init_slots(input, tsdata->max_support_points,
1181                                 INPUT_MT_DIRECT);
1182         if (error) {
1183                 dev_err(&client->dev, "Unable to init MT slots.\n");
1184                 return error;
1185         }
1186
1187         i2c_set_clientdata(client, tsdata);
1188
1189         irq_flags = irq_get_trigger_type(client->irq);
1190         if (irq_flags == IRQF_TRIGGER_NONE)
1191                 irq_flags = IRQF_TRIGGER_FALLING;
1192         irq_flags |= IRQF_ONESHOT;
1193
1194         error = devm_request_threaded_irq(&client->dev, client->irq,
1195                                         NULL, edt_ft5x06_ts_isr, irq_flags,
1196                                         client->name, tsdata);
1197         if (error) {
1198                 dev_err(&client->dev, "Unable to request touchscreen IRQ.\n");
1199                 return error;
1200         }
1201
1202         error = devm_device_add_group(&client->dev, &edt_ft5x06_attr_group);
1203         if (error)
1204                 return error;
1205
1206         error = input_register_device(input);
1207         if (error)
1208                 return error;
1209
1210         edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
1211
1212         dev_dbg(&client->dev,
1213                 "EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
1214                 client->irq,
1215                 tsdata->wake_gpio ? desc_to_gpio(tsdata->wake_gpio) : -1,
1216                 tsdata->reset_gpio ? desc_to_gpio(tsdata->reset_gpio) : -1);
1217
1218         return 0;
1219 }
1220
1221 static int edt_ft5x06_ts_remove(struct i2c_client *client)
1222 {
1223         struct edt_ft5x06_ts_data *tsdata = i2c_get_clientdata(client);
1224
1225         edt_ft5x06_ts_teardown_debugfs(tsdata);
1226
1227         return 0;
1228 }
1229
1230 static const struct edt_i2c_chip_data edt_ft5x06_data = {
1231         .max_support_points = 5,
1232 };
1233
1234 static const struct edt_i2c_chip_data edt_ft5506_data = {
1235         .max_support_points = 10,
1236 };
1237
1238 static const struct edt_i2c_chip_data edt_ft6236_data = {
1239         .max_support_points = 2,
1240 };
1241
1242 static const struct i2c_device_id edt_ft5x06_ts_id[] = {
1243         { .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },
1244         { .name = "edt-ft5506", .driver_data = (long)&edt_ft5506_data },
1245         { .name = "ev-ft5726", .driver_data = (long)&edt_ft5506_data },
1246         /* Note no edt- prefix for compatibility with the ft6236.c driver */
1247         { .name = "ft6236", .driver_data = (long)&edt_ft6236_data },
1248         { /* sentinel */ }
1249 };
1250 MODULE_DEVICE_TABLE(i2c, edt_ft5x06_ts_id);
1251
1252 static const struct of_device_id edt_ft5x06_of_match[] = {
1253         { .compatible = "edt,edt-ft5206", .data = &edt_ft5x06_data },
1254         { .compatible = "edt,edt-ft5306", .data = &edt_ft5x06_data },
1255         { .compatible = "edt,edt-ft5406", .data = &edt_ft5x06_data },
1256         { .compatible = "edt,edt-ft5506", .data = &edt_ft5506_data },
1257         { .compatible = "evervision,ev-ft5726", .data = &edt_ft5506_data },
1258         /* Note focaltech vendor prefix for compatibility with ft6236.c */
1259         { .compatible = "focaltech,ft6236", .data = &edt_ft6236_data },
1260         { /* sentinel */ }
1261 };
1262 MODULE_DEVICE_TABLE(of, edt_ft5x06_of_match);
1263
1264 static struct i2c_driver edt_ft5x06_ts_driver = {
1265         .driver = {
1266                 .name = "edt_ft5x06",
1267                 .of_match_table = edt_ft5x06_of_match,
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");