drivers/input/touchscreen/ilitek_ts_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * ILITEK Touch IC driver for 23XX, 25XX and Lego series
   4  *
   5  * Copyright (C) 2011 ILI Technology Corporation.
   6  * Copyright (C) 2020 Luca Hsu <luca_hsu@ilitek.com>
   7  * Copyright (C) 2021 Joe Hung <joe_hung@ilitek.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/input.h>
  13 #include <linux/input/mt.h>
  14 #include <linux/i2c.h>
  15 #include <linux/slab.h>
  16 #include <linux/delay.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/gpio.h>
  19 #include <linux/gpio/consumer.h>
  20 #include <linux/errno.h>
  21 #include <linux/acpi.h>
  22 #include <linux/input/touchscreen.h>
  23 #include <asm/unaligned.h>
  24
  25
  26 #define ILITEK_TS_NAME                                  "ilitek_ts"
  27 #define BL_V1_8                                         0x108
  28 #define BL_V1_7                                         0x107
  29 #define BL_V1_6                                         0x106
  30
  31 #define ILITEK_TP_CMD_GET_TP_RES                        0x20
  32 #define ILITEK_TP_CMD_GET_SCRN_RES                      0x21
  33 #define ILITEK_TP_CMD_SET_IC_SLEEP                      0x30
  34 #define ILITEK_TP_CMD_SET_IC_WAKE                       0x31
  35 #define ILITEK_TP_CMD_GET_FW_VER                        0x40
  36 #define ILITEK_TP_CMD_GET_PRL_VER                       0x42
  37 #define ILITEK_TP_CMD_GET_MCU_VER                       0x61
  38 #define ILITEK_TP_CMD_GET_IC_MODE                       0xC0
  39
  40 #define REPORT_COUNT_ADDRESS                            61
  41 #define ILITEK_SUPPORT_MAX_POINT                        40
  42
  43 struct ilitek_protocol_info {
  44         u16 ver;
  45         u8 ver_major;
  46 };
  47
  48 struct ilitek_ts_data {
  49         struct i2c_client               *client;
  50         struct gpio_desc                *reset_gpio;
  51         struct input_dev                *input_dev;
  52         struct touchscreen_properties   prop;
  53
  54         const struct ilitek_protocol_map *ptl_cb_func;
  55         struct ilitek_protocol_info     ptl;
  56
  57         char                            product_id[30];
  58         u16                             mcu_ver;
  59         u8                              ic_mode;
  60         u8                              firmware_ver[8];
  61
  62         s32                             reset_time;
  63         s32                             screen_max_x;
  64         s32                             screen_max_y;
  65         s32                             screen_min_x;
  66         s32                             screen_min_y;
  67         s32                             max_tp;
  68 };
  69
  70 struct ilitek_protocol_map {
  71         u16 cmd;
  72         const char *name;
  73         int (*func)(struct ilitek_ts_data *ts, u16 cmd, u8 *inbuf, u8 *outbuf);
  74 };
  75
  76 enum ilitek_cmds {
  77         /* common cmds */
  78         GET_PTL_VER = 0,
  79         GET_FW_VER,
  80         GET_SCRN_RES,
  81         GET_TP_RES,
  82         GET_IC_MODE,
  83         GET_MCU_VER,
  84         SET_IC_SLEEP,
  85         SET_IC_WAKE,
  86
  87         /* ALWAYS keep at the end */
  88         MAX_CMD_CNT
  89 };
  90
  91 /* ILITEK I2C R/W APIs */
  92 static int ilitek_i2c_write_and_read(struct ilitek_ts_data *ts,
  93                                      u8 *cmd, int write_len, int delay,
  94                                      u8 *data, int read_len)
  95 {
  96         int error;
  97         struct i2c_client *client = ts->client;
  98         struct i2c_msg msgs[] = {
  99                 {
 100                         .addr = client->addr,
 101                         .flags = 0,
 102                         .len = write_len,
 103                         .buf = cmd,
 104                 },
 105                 {
 106                         .addr = client->addr,
 107                         .flags = I2C_M_RD,
 108                         .len = read_len,
 109                         .buf = data,
 110                 },
 111         };
 112
 113         if (delay == 0 && write_len > 0 && read_len > 0) {
 114                 error = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
 115                 if (error < 0)
 116                         return error;
 117         } else {
 118                 if (write_len > 0) {
 119                         error = i2c_transfer(client->adapter, msgs, 1);
 120                         if (error < 0)
 121                                 return error;
 122                 }
 123                 if (delay > 0)
 124                         mdelay(delay);
 125
 126                 if (read_len > 0) {
 127                         error = i2c_transfer(client->adapter, msgs + 1, 1);
 128                         if (error < 0)
 129                                 return error;
 130                 }
 131         }
 132
 133         return 0;
 134 }
 135
 136 /* ILITEK ISR APIs */
 137 static void ilitek_touch_down(struct ilitek_ts_data *ts, unsigned int id,
 138                               unsigned int x, unsigned int y)
 139 {
 140         struct input_dev *input = ts->input_dev;
 141
 142         input_mt_slot(input, id);
 143         input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
 144
 145         touchscreen_report_pos(input, &ts->prop, x, y, true);
 146 }
 147
 148 static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts)
 149 {
 150         int error = 0;
 151         u8 buf[512];
 152         int packet_len = 5;
 153         int packet_max_point = 10;
 154         int report_max_point;
 155         int i, count;
 156         struct input_dev *input = ts->input_dev;
 157         struct device *dev = &ts->client->dev;
 158         unsigned int x, y, status, id;
 159
 160         error = ilitek_i2c_write_and_read(ts, NULL, 0, 0, buf, 64);
 161         if (error) {
 162                 dev_err(dev, "get touch info failed, err:%d\n", error);
 163                 goto err_sync_frame;
 164         }
 165
 166         report_max_point = buf[REPORT_COUNT_ADDRESS];
 167         if (report_max_point > ts->max_tp) {
 168                 dev_err(dev, "FW report max point:%d > panel info. max:%d\n",
 169                         report_max_point, ts->max_tp);
 170                 error = -EINVAL;
 171                 goto err_sync_frame;
 172         }
 173
 174         count = DIV_ROUND_UP(report_max_point, packet_max_point);
 175         for (i = 1; i < count; i++) {
 176                 error = ilitek_i2c_write_and_read(ts, NULL, 0, 0,
 177                                                   buf + i * 64, 64);
 178                 if (error) {
 179                         dev_err(dev, "get touch info. failed, cnt:%d, err:%d\n",
 180                                 count, error);
 181                         goto err_sync_frame;
 182                 }
 183         }
 184
 185         for (i = 0; i < report_max_point; i++) {
 186                 status = buf[i * packet_len + 1] & 0x40;
 187                 if (!status)
 188                         continue;
 189
 190                 id = buf[i * packet_len + 1] & 0x3F;
 191
 192                 x = get_unaligned_le16(buf + i * packet_len + 2);
 193                 y = get_unaligned_le16(buf + i * packet_len + 4);
 194
 195                 if (x > ts->screen_max_x || x < ts->screen_min_x ||
 196                     y > ts->screen_max_y || y < ts->screen_min_y) {
 197                         dev_warn(dev, "invalid position, X[%d,%u,%d], Y[%d,%u,%d]\n",
 198                                  ts->screen_min_x, x, ts->screen_max_x,
 199                                  ts->screen_min_y, y, ts->screen_max_y);
 200                         continue;
 201                 }
 202
 203                 ilitek_touch_down(ts, id, x, y);
 204         }
 205
 206 err_sync_frame:
 207         input_mt_sync_frame(input);
 208         input_sync(input);
 209         return error;
 210 }
 211
 212 /* APIs of cmds for ILITEK Touch IC */
 213 static int api_protocol_set_cmd(struct ilitek_ts_data *ts,
 214                                 u16 idx, u8 *inbuf, u8 *outbuf)
 215 {
 216         u16 cmd;
 217         int error;
 218
 219         if (idx >= MAX_CMD_CNT)
 220                 return -EINVAL;
 221
 222         cmd = ts->ptl_cb_func[idx].cmd;
 223         error = ts->ptl_cb_func[idx].func(ts, cmd, inbuf, outbuf);
 224         if (error)
 225                 return error;
 226
 227         return 0;
 228 }
 229
 230 static int api_protocol_get_ptl_ver(struct ilitek_ts_data *ts,
 231                                     u16 cmd, u8 *inbuf, u8 *outbuf)
 232 {
 233         int error;
 234         u8 buf[64];
 235
 236         buf[0] = cmd;
 237         error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 3);
 238         if (error)
 239                 return error;
 240
 241         ts->ptl.ver = get_unaligned_be16(outbuf);
 242         ts->ptl.ver_major = outbuf[0];
 243
 244         return 0;
 245 }
 246
 247 static int api_protocol_get_mcu_ver(struct ilitek_ts_data *ts,
 248                                     u16 cmd, u8 *inbuf, u8 *outbuf)
 249 {
 250         int error;
 251         u8 buf[64];
 252
 253         buf[0] = cmd;
 254         error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 32);
 255         if (error)
 256                 return error;
 257
 258         ts->mcu_ver = get_unaligned_le16(outbuf);
 259         memset(ts->product_id, 0, sizeof(ts->product_id));
 260         memcpy(ts->product_id, outbuf + 6, 26);
 261
 262         return 0;
 263 }
 264
 265 static int api_protocol_get_fw_ver(struct ilitek_ts_data *ts,
 266                                    u16 cmd, u8 *inbuf, u8 *outbuf)
 267 {
 268         int error;
 269         u8 buf[64];
 270
 271         buf[0] = cmd;
 272         error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
 273         if (error)
 274                 return error;
 275
 276         memcpy(ts->firmware_ver, outbuf, 8);
 277
 278         return 0;
 279 }
 280
 281 static int api_protocol_get_scrn_res(struct ilitek_ts_data *ts,
 282                                      u16 cmd, u8 *inbuf, u8 *outbuf)
 283 {
 284         int error;
 285         u8 buf[64];
 286
 287         buf[0] = cmd;
 288         error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 8);
 289         if (error)
 290                 return error;
 291
 292         ts->screen_min_x = get_unaligned_le16(outbuf);
 293         ts->screen_min_y = get_unaligned_le16(outbuf + 2);
 294         ts->screen_max_x = get_unaligned_le16(outbuf + 4);
 295         ts->screen_max_y = get_unaligned_le16(outbuf + 6);
 296
 297         return 0;
 298 }
 299
 300 static int api_protocol_get_tp_res(struct ilitek_ts_data *ts,
 301                                    u16 cmd, u8 *inbuf, u8 *outbuf)
 302 {
 303         int error;
 304         u8 buf[64];
 305
 306         buf[0] = cmd;
 307         error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 15);
 308         if (error)
 309                 return error;
 310
 311         ts->max_tp = outbuf[8];
 312         if (ts->max_tp > ILITEK_SUPPORT_MAX_POINT) {
 313                 dev_err(&ts->client->dev, "Invalid MAX_TP:%d from FW\n",
 314                         ts->max_tp);
 315                 return -EINVAL;
 316         }
 317
 318         return 0;
 319 }
 320
 321 static int api_protocol_get_ic_mode(struct ilitek_ts_data *ts,
 322                                     u16 cmd, u8 *inbuf, u8 *outbuf)
 323 {
 324         int error;
 325         u8 buf[64];
 326
 327         buf[0] = cmd;
 328         error = ilitek_i2c_write_and_read(ts, buf, 1, 5, outbuf, 2);
 329         if (error)
 330                 return error;
 331
 332         ts->ic_mode = outbuf[0];
 333         return 0;
 334 }
 335
 336 static int api_protocol_set_ic_sleep(struct ilitek_ts_data *ts,
 337                                      u16 cmd, u8 *inbuf, u8 *outbuf)
 338 {
 339         u8 buf[64];
 340
 341         buf[0] = cmd;
 342         return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
 343 }
 344
 345 static int api_protocol_set_ic_wake(struct ilitek_ts_data *ts,
 346                                     u16 cmd, u8 *inbuf, u8 *outbuf)
 347 {
 348         u8 buf[64];
 349
 350         buf[0] = cmd;
 351         return ilitek_i2c_write_and_read(ts, buf, 1, 0, NULL, 0);
 352 }
 353
 354 static const struct ilitek_protocol_map ptl_func_map[] = {
 355         /* common cmds */
 356         [GET_PTL_VER] = {
 357                 ILITEK_TP_CMD_GET_PRL_VER, "GET_PTL_VER",
 358                 api_protocol_get_ptl_ver
 359         },
 360         [GET_FW_VER] = {
 361                 ILITEK_TP_CMD_GET_FW_VER, "GET_FW_VER",
 362                 api_protocol_get_fw_ver
 363         },
 364         [GET_SCRN_RES] = {
 365                 ILITEK_TP_CMD_GET_SCRN_RES, "GET_SCRN_RES",
 366                 api_protocol_get_scrn_res
 367         },
 368         [GET_TP_RES] = {
 369                 ILITEK_TP_CMD_GET_TP_RES, "GET_TP_RES",
 370                 api_protocol_get_tp_res
 371         },
 372         [GET_IC_MODE] = {
 373                 ILITEK_TP_CMD_GET_IC_MODE, "GET_IC_MODE",
 374                            api_protocol_get_ic_mode
 375         },
 376         [GET_MCU_VER] = {
 377                 ILITEK_TP_CMD_GET_MCU_VER, "GET_MOD_VER",
 378                            api_protocol_get_mcu_ver
 379         },
 380         [SET_IC_SLEEP] = {
 381                 ILITEK_TP_CMD_SET_IC_SLEEP, "SET_IC_SLEEP",
 382                 api_protocol_set_ic_sleep
 383         },
 384         [SET_IC_WAKE] = {
 385                 ILITEK_TP_CMD_SET_IC_WAKE, "SET_IC_WAKE",
 386                 api_protocol_set_ic_wake
 387         },
 388 };
 389
 390 /* Probe APIs */
 391 static void ilitek_reset(struct ilitek_ts_data *ts, int delay)
 392 {
 393         if (ts->reset_gpio) {
 394                 gpiod_set_value(ts->reset_gpio, 1);
 395                 mdelay(10);
 396                 gpiod_set_value(ts->reset_gpio, 0);
 397                 mdelay(delay);
 398         }
 399 }
 400
 401 static int ilitek_protocol_init(struct ilitek_ts_data *ts)
 402 {
 403         int error;
 404         u8 outbuf[64];
 405
 406         ts->ptl_cb_func = ptl_func_map;
 407         ts->reset_time = 600;
 408
 409         error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
 410         if (error)
 411                 return error;
 412
 413         /* Protocol v3 is not support currently */
 414         if (ts->ptl.ver_major == 0x3 ||
 415             ts->ptl.ver == BL_V1_6 ||
 416             ts->ptl.ver == BL_V1_7)
 417                 return -EINVAL;
 418
 419         return 0;
 420 }
 421
 422 static int ilitek_read_tp_info(struct ilitek_ts_data *ts, bool boot)
 423 {
 424         u8 outbuf[256];
 425         int error;
 426
 427         error = api_protocol_set_cmd(ts, GET_PTL_VER, NULL, outbuf);
 428         if (error)
 429                 return error;
 430
 431         error = api_protocol_set_cmd(ts, GET_MCU_VER, NULL, outbuf);
 432         if (error)
 433                 return error;
 434
 435         error = api_protocol_set_cmd(ts, GET_FW_VER, NULL, outbuf);
 436         if (error)
 437                 return error;
 438
 439         if (boot) {
 440                 error = api_protocol_set_cmd(ts, GET_SCRN_RES, NULL,
 441                                              outbuf);
 442                 if (error)
 443                         return error;
 444         }
 445
 446         error = api_protocol_set_cmd(ts, GET_TP_RES, NULL, outbuf);
 447         if (error)
 448                 return error;
 449
 450         error = api_protocol_set_cmd(ts, GET_IC_MODE, NULL, outbuf);
 451         if (error)
 452                 return error;
 453
 454         return 0;
 455 }
 456
 457 static int ilitek_input_dev_init(struct device *dev, struct ilitek_ts_data *ts)
 458 {
 459         int error;
 460         struct input_dev *input;
 461
 462         input = devm_input_allocate_device(dev);
 463         if (!input)
 464                 return -ENOMEM;
 465
 466         ts->input_dev = input;
 467         input->name = ILITEK_TS_NAME;
 468         input->id.bustype = BUS_I2C;
 469
 470         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 471
 472         input_set_abs_params(input, ABS_MT_POSITION_X,
 473                              ts->screen_min_x, ts->screen_max_x, 0, 0);
 474         input_set_abs_params(input, ABS_MT_POSITION_Y,
 475                              ts->screen_min_y, ts->screen_max_y, 0, 0);
 476
 477         touchscreen_parse_properties(input, true, &ts->prop);
 478
 479         error = input_mt_init_slots(input, ts->max_tp,
 480                                     INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
 481         if (error) {
 482                 dev_err(dev, "initialize MT slots failed, err:%d\n", error);
 483                 return error;
 484         }
 485
 486         error = input_register_device(input);
 487         if (error) {
 488                 dev_err(dev, "register input device failed, err:%d\n", error);
 489                 return error;
 490         }
 491
 492         return 0;
 493 }
 494
 495 static irqreturn_t ilitek_i2c_isr(int irq, void *dev_id)
 496 {
 497         struct ilitek_ts_data *ts = dev_id;
 498         int error;
 499
 500         error = ilitek_process_and_report_v6(ts);
 501         if (error < 0) {
 502                 dev_err(&ts->client->dev, "[%s] err:%d\n", __func__, error);
 503                 return IRQ_NONE;
 504         }
 505
 506         return IRQ_HANDLED;
 507 }
 508
 509 static ssize_t firmware_version_show(struct device *dev,
 510                                      struct device_attribute *attr, char *buf)
 511 {
 512         struct i2c_client *client = to_i2c_client(dev);
 513         struct ilitek_ts_data *ts = i2c_get_clientdata(client);
 514
 515         return scnprintf(buf, PAGE_SIZE,
 516                          "fw version: [%02X%02X.%02X%02X.%02X%02X.%02X%02X]\n",
 517                          ts->firmware_ver[0], ts->firmware_ver[1],
 518                          ts->firmware_ver[2], ts->firmware_ver[3],
 519                          ts->firmware_ver[4], ts->firmware_ver[5],
 520                          ts->firmware_ver[6], ts->firmware_ver[7]);
 521 }
 522 static DEVICE_ATTR_RO(firmware_version);
 523
 524 static ssize_t product_id_show(struct device *dev,
 525                                struct device_attribute *attr, char *buf)
 526 {
 527         struct i2c_client *client = to_i2c_client(dev);
 528         struct ilitek_ts_data *ts = i2c_get_clientdata(client);
 529
 530         return scnprintf(buf, PAGE_SIZE, "product id: [%04X], module: [%s]\n",
 531                          ts->mcu_ver, ts->product_id);
 532 }
 533 static DEVICE_ATTR_RO(product_id);
 534
 535 static struct attribute *ilitek_sysfs_attrs[] = {
 536         &dev_attr_firmware_version.attr,
 537         &dev_attr_product_id.attr,
 538         NULL
 539 };
 540
 541 static struct attribute_group ilitek_attrs_group = {
 542         .attrs = ilitek_sysfs_attrs,
 543 };
 544
 545 static int ilitek_ts_i2c_probe(struct i2c_client *client,
 546                                const struct i2c_device_id *id)
 547 {
 548         struct ilitek_ts_data *ts;
 549         struct device *dev = &client->dev;
 550         int error;
 551
 552         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 553                 dev_err(dev, "i2c check functionality failed\n");
 554                 return -ENXIO;
 555         }
 556
 557         ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
 558         if (!ts)
 559                 return -ENOMEM;
 560
 561         ts->client = client;
 562         i2c_set_clientdata(client, ts);
 563
 564         ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
 565         if (IS_ERR(ts->reset_gpio)) {
 566                 error = PTR_ERR(ts->reset_gpio);
 567                 dev_err(dev, "request gpiod failed: %d", error);
 568                 return error;
 569         }
 570
 571         ilitek_reset(ts, 1000);
 572
 573         error = ilitek_protocol_init(ts);
 574         if (error) {
 575                 dev_err(dev, "protocol init failed: %d", error);
 576                 return error;
 577         }
 578
 579         error = ilitek_read_tp_info(ts, true);
 580         if (error) {
 581                 dev_err(dev, "read tp info failed: %d", error);
 582                 return error;
 583         }
 584
 585         error = ilitek_input_dev_init(dev, ts);
 586         if (error) {
 587                 dev_err(dev, "input dev init failed: %d", error);
 588                 return error;
 589         }
 590
 591         error = devm_request_threaded_irq(dev, ts->client->irq,
 592                                           NULL, ilitek_i2c_isr, IRQF_ONESHOT,
 593                                           "ilitek_touch_irq", ts);
 594         if (error) {
 595                 dev_err(dev, "request threaded irq failed: %d\n", error);
 596                 return error;
 597         }
 598
 599         error = devm_device_add_group(dev, &ilitek_attrs_group);
 600         if (error) {
 601                 dev_err(dev, "sysfs create group failed: %d\n", error);
 602                 return error;
 603         }
 604
 605         return 0;
 606 }
 607
 608 static int __maybe_unused ilitek_suspend(struct device *dev)
 609 {
 610         struct i2c_client *client = to_i2c_client(dev);
 611         struct ilitek_ts_data *ts = i2c_get_clientdata(client);
 612         int error;
 613
 614         disable_irq(client->irq);
 615
 616         if (!device_may_wakeup(dev)) {
 617                 error = api_protocol_set_cmd(ts, SET_IC_SLEEP, NULL, NULL);
 618                 if (error)
 619                         return error;
 620         }
 621
 622         return 0;
 623 }
 624
 625 static int __maybe_unused ilitek_resume(struct device *dev)
 626 {
 627         struct i2c_client *client = to_i2c_client(dev);
 628         struct ilitek_ts_data *ts = i2c_get_clientdata(client);
 629         int error;
 630
 631         if (!device_may_wakeup(dev)) {
 632                 error = api_protocol_set_cmd(ts, SET_IC_WAKE, NULL, NULL);
 633                 if (error)
 634                         return error;
 635
 636                 ilitek_reset(ts, ts->reset_time);
 637         }
 638
 639         enable_irq(client->irq);
 640
 641         return 0;
 642 }
 643
 644 static SIMPLE_DEV_PM_OPS(ilitek_pm_ops, ilitek_suspend, ilitek_resume);
 645
 646 static const struct i2c_device_id ilitek_ts_i2c_id[] = {
 647         { ILITEK_TS_NAME, 0 },
 648         { },
 649 };
 650 MODULE_DEVICE_TABLE(i2c, ilitek_ts_i2c_id);
 651
 652 #ifdef CONFIG_ACPI
 653 static const struct acpi_device_id ilitekts_acpi_id[] = {
 654         { "ILTK0001", 0 },
 655         { },
 656 };
 657 MODULE_DEVICE_TABLE(acpi, ilitekts_acpi_id);
 658 #endif
 659
 660 #ifdef CONFIG_OF
 661 static const struct of_device_id ilitek_ts_i2c_match[] = {
 662         {.compatible = "ilitek,ili2130",},
 663         {.compatible = "ilitek,ili2131",},
 664         {.compatible = "ilitek,ili2132",},
 665         {.compatible = "ilitek,ili2316",},
 666         {.compatible = "ilitek,ili2322",},
 667         {.compatible = "ilitek,ili2323",},
 668         {.compatible = "ilitek,ili2326",},
 669         {.compatible = "ilitek,ili2520",},
 670         {.compatible = "ilitek,ili2521",},
 671         { },
 672 };
 673 MODULE_DEVICE_TABLE(of, ilitek_ts_i2c_match);
 674 #endif
 675
 676 static struct i2c_driver ilitek_ts_i2c_driver = {
 677         .driver = {
 678                 .name = ILITEK_TS_NAME,
 679                 .pm = &ilitek_pm_ops,
 680                 .of_match_table = of_match_ptr(ilitek_ts_i2c_match),
 681                 .acpi_match_table = ACPI_PTR(ilitekts_acpi_id),
 682         },
 683         .probe = ilitek_ts_i2c_probe,
 684         .id_table = ilitek_ts_i2c_id,
 685 };
 686 module_i2c_driver(ilitek_ts_i2c_driver);
 687
 688 MODULE_AUTHOR("ILITEK");
 689 MODULE_DESCRIPTION("ILITEK I2C Touchscreen Driver");
 690 MODULE_LICENSE("GPL");