drivers/input/touchscreen/silead.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* -------------------------------------------------------------------------
   3  * Copyright (C) 2014-2015, Intel Corporation
   4  *
   5  * Derived from:
   6  *  gslX68X.c
   7  *  Copyright (C) 2010-2015, Shanghai Sileadinc Co.Ltd
   8  *
   9  * -------------------------------------------------------------------------
  10  */
  11
  12 #include <linux/i2c.h>
  13 #include <linux/module.h>
  14 #include <linux/acpi.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/gpio/consumer.h>
  17 #include <linux/delay.h>
  18 #include <linux/firmware.h>
  19 #include <linux/input.h>
  20 #include <linux/input/mt.h>
  21 #include <linux/input/touchscreen.h>
  22 #include <linux/pm.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/irq.h>
  25 #include <linux/regulator/consumer.h>
  26
  27 #include <asm/unaligned.h>
  28
  29 #define SILEAD_TS_NAME          "silead_ts"
  30
  31 #define SILEAD_REG_RESET        0xE0
  32 #define SILEAD_REG_DATA         0x80
  33 #define SILEAD_REG_TOUCH_NR     0x80
  34 #define SILEAD_REG_POWER        0xBC
  35 #define SILEAD_REG_CLOCK        0xE4
  36 #define SILEAD_REG_STATUS       0xB0
  37 #define SILEAD_REG_ID           0xFC
  38 #define SILEAD_REG_MEM_CHECK    0xB0
  39
  40 #define SILEAD_STATUS_OK        0x5A5A5A5A
  41 #define SILEAD_TS_DATA_LEN      44
  42 #define SILEAD_CLOCK            0x04
  43
  44 #define SILEAD_CMD_RESET        0x88
  45 #define SILEAD_CMD_START        0x00
  46
  47 #define SILEAD_POINT_DATA_LEN   0x04
  48 #define SILEAD_POINT_Y_OFF      0x00
  49 #define SILEAD_POINT_Y_MSB_OFF  0x01
  50 #define SILEAD_POINT_X_OFF      0x02
  51 #define SILEAD_POINT_X_MSB_OFF  0x03
  52 #define SILEAD_EXTRA_DATA_MASK  0xF0
  53
  54 #define SILEAD_CMD_SLEEP_MIN    10000
  55 #define SILEAD_CMD_SLEEP_MAX    20000
  56 #define SILEAD_POWER_SLEEP      20
  57 #define SILEAD_STARTUP_SLEEP    30
  58
  59 #define SILEAD_MAX_FINGERS      10
  60
  61 enum silead_ts_power {
  62         SILEAD_POWER_ON  = 1,
  63         SILEAD_POWER_OFF = 0
  64 };
  65
  66 struct silead_ts_data {
  67         struct i2c_client *client;
  68         struct gpio_desc *gpio_power;
  69         struct input_dev *input;
  70         struct regulator_bulk_data regulators[2];
  71         char fw_name[64];
  72         struct touchscreen_properties prop;
  73         u32 max_fingers;
  74         u32 chip_id;
  75         struct input_mt_pos pos[SILEAD_MAX_FINGERS];
  76         int slots[SILEAD_MAX_FINGERS];
  77         int id[SILEAD_MAX_FINGERS];
  78 };
  79
  80 struct silead_fw_data {
  81         u32 offset;
  82         u32 val;
  83 };
  84
  85 static int silead_ts_request_input_dev(struct silead_ts_data *data)
  86 {
  87         struct device *dev = &data->client->dev;
  88         int error;
  89
  90         data->input = devm_input_allocate_device(dev);
  91         if (!data->input) {
  92                 dev_err(dev,
  93                         "Failed to allocate input device\n");
  94                 return -ENOMEM;
  95         }
  96
  97         input_set_abs_params(data->input, ABS_MT_POSITION_X, 0, 4095, 0, 0);
  98         input_set_abs_params(data->input, ABS_MT_POSITION_Y, 0, 4095, 0, 0);
  99         touchscreen_parse_properties(data->input, true, &data->prop);
 100
 101         input_mt_init_slots(data->input, data->max_fingers,
 102                             INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED |
 103                             INPUT_MT_TRACK);
 104
 105         if (device_property_read_bool(dev, "silead,home-button"))
 106                 input_set_capability(data->input, EV_KEY, KEY_LEFTMETA);
 107
 108         data->input->name = SILEAD_TS_NAME;
 109         data->input->phys = "input/ts";
 110         data->input->id.bustype = BUS_I2C;
 111
 112         error = input_register_device(data->input);
 113         if (error) {
 114                 dev_err(dev, "Failed to register input device: %d\n", error);
 115                 return error;
 116         }
 117
 118         return 0;
 119 }
 120
 121 static void silead_ts_set_power(struct i2c_client *client,
 122                                 enum silead_ts_power state)
 123 {
 124         struct silead_ts_data *data = i2c_get_clientdata(client);
 125
 126         if (data->gpio_power) {
 127                 gpiod_set_value_cansleep(data->gpio_power, state);
 128                 msleep(SILEAD_POWER_SLEEP);
 129         }
 130 }
 131
 132 static void silead_ts_read_data(struct i2c_client *client)
 133 {
 134         struct silead_ts_data *data = i2c_get_clientdata(client);
 135         struct input_dev *input = data->input;
 136         struct device *dev = &client->dev;
 137         u8 *bufp, buf[SILEAD_TS_DATA_LEN];
 138         int touch_nr, softbutton, error, i;
 139         bool softbutton_pressed = false;
 140
 141         error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_DATA,
 142                                               SILEAD_TS_DATA_LEN, buf);
 143         if (error < 0) {
 144                 dev_err(dev, "Data read error %d\n", error);
 145                 return;
 146         }
 147
 148         if (buf[0] > data->max_fingers) {
 149                 dev_warn(dev, "More touches reported then supported %d > %d\n",
 150                          buf[0], data->max_fingers);
 151                 buf[0] = data->max_fingers;
 152         }
 153
 154         touch_nr = 0;
 155         bufp = buf + SILEAD_POINT_DATA_LEN;
 156         for (i = 0; i < buf[0]; i++, bufp += SILEAD_POINT_DATA_LEN) {
 157                 softbutton = (bufp[SILEAD_POINT_Y_MSB_OFF] &
 158                               SILEAD_EXTRA_DATA_MASK) >> 4;
 159
 160                 if (softbutton) {
 161                         /*
 162                          * For now only respond to softbutton == 0x01, some
 163                          * tablets *without* a capacative button send 0x04
 164                          * when crossing the edges of the screen.
 165                          */
 166                         if (softbutton == 0x01)
 167                                 softbutton_pressed = true;
 168
 169                         continue;
 170                 }
 171
 172                 /*
 173                  * Bits 4-7 are the touch id, note not all models have
 174                  * hardware touch ids so atm we don't use these.
 175                  */
 176                 data->id[touch_nr] = (bufp[SILEAD_POINT_X_MSB_OFF] &
 177                                       SILEAD_EXTRA_DATA_MASK) >> 4;
 178                 touchscreen_set_mt_pos(&data->pos[touch_nr], &data->prop,
 179                         get_unaligned_le16(&bufp[SILEAD_POINT_X_OFF]) & 0xfff,
 180                         get_unaligned_le16(&bufp[SILEAD_POINT_Y_OFF]) & 0xfff);
 181                 touch_nr++;
 182         }
 183
 184         input_mt_assign_slots(input, data->slots, data->pos, touch_nr, 0);
 185
 186         for (i = 0; i < touch_nr; i++) {
 187                 input_mt_slot(input, data->slots[i]);
 188                 input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
 189                 input_report_abs(input, ABS_MT_POSITION_X, data->pos[i].x);
 190                 input_report_abs(input, ABS_MT_POSITION_Y, data->pos[i].y);
 191
 192                 dev_dbg(dev, "x=%d y=%d hw_id=%d sw_id=%d\n", data->pos[i].x,
 193                         data->pos[i].y, data->id[i], data->slots[i]);
 194         }
 195
 196         input_mt_sync_frame(input);
 197         input_report_key(input, KEY_LEFTMETA, softbutton_pressed);
 198         input_sync(input);
 199 }
 200
 201 static int silead_ts_init(struct i2c_client *client)
 202 {
 203         struct silead_ts_data *data = i2c_get_clientdata(client);
 204         int error;
 205
 206         error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
 207                                           SILEAD_CMD_RESET);
 208         if (error)
 209                 goto i2c_write_err;
 210         usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 211
 212         error = i2c_smbus_write_byte_data(client, SILEAD_REG_TOUCH_NR,
 213                                         data->max_fingers);
 214         if (error)
 215                 goto i2c_write_err;
 216         usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 217
 218         error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
 219                                           SILEAD_CLOCK);
 220         if (error)
 221                 goto i2c_write_err;
 222         usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 223
 224         error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
 225                                           SILEAD_CMD_START);
 226         if (error)
 227                 goto i2c_write_err;
 228         usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 229
 230         return 0;
 231
 232 i2c_write_err:
 233         dev_err(&client->dev, "Registers clear error %d\n", error);
 234         return error;
 235 }
 236
 237 static int silead_ts_reset(struct i2c_client *client)
 238 {
 239         int error;
 240
 241         error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET,
 242                                           SILEAD_CMD_RESET);
 243         if (error)
 244                 goto i2c_write_err;
 245         usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 246
 247         error = i2c_smbus_write_byte_data(client, SILEAD_REG_CLOCK,
 248                                           SILEAD_CLOCK);
 249         if (error)
 250                 goto i2c_write_err;
 251         usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 252
 253         error = i2c_smbus_write_byte_data(client, SILEAD_REG_POWER,
 254                                           SILEAD_CMD_START);
 255         if (error)
 256                 goto i2c_write_err;
 257         usleep_range(SILEAD_CMD_SLEEP_MIN, SILEAD_CMD_SLEEP_MAX);
 258
 259         return 0;
 260
 261 i2c_write_err:
 262         dev_err(&client->dev, "Chip reset error %d\n", error);
 263         return error;
 264 }
 265
 266 static int silead_ts_startup(struct i2c_client *client)
 267 {
 268         int error;
 269
 270         error = i2c_smbus_write_byte_data(client, SILEAD_REG_RESET, 0x00);
 271         if (error) {
 272                 dev_err(&client->dev, "Startup error %d\n", error);
 273                 return error;
 274         }
 275
 276         msleep(SILEAD_STARTUP_SLEEP);
 277
 278         return 0;
 279 }
 280
 281 static int silead_ts_load_fw(struct i2c_client *client)
 282 {
 283         struct device *dev = &client->dev;
 284         struct silead_ts_data *data = i2c_get_clientdata(client);
 285         unsigned int fw_size, i;
 286         const struct firmware *fw;
 287         struct silead_fw_data *fw_data;
 288         int error;
 289
 290         dev_dbg(dev, "Firmware file name: %s", data->fw_name);
 291
 292         error = reject_firmware(&fw, data->fw_name, dev);
 293         if (error) {
 294                 dev_err(dev, "Firmware request error %d\n", error);
 295                 return error;
 296         }
 297
 298         fw_size = fw->size / sizeof(*fw_data);
 299         fw_data = (struct silead_fw_data *)fw->data;
 300
 301         for (i = 0; i < fw_size; i++) {
 302                 error = i2c_smbus_write_i2c_block_data(client,
 303                                                        fw_data[i].offset,
 304                                                        4,
 305                                                        (u8 *)&fw_data[i].val);
 306                 if (error) {
 307                         dev_err(dev, "Firmware load error %d\n", error);
 308                         break;
 309                 }
 310         }
 311
 312         release_firmware(fw);
 313         return error ?: 0;
 314 }
 315
 316 static u32 silead_ts_get_status(struct i2c_client *client)
 317 {
 318         int error;
 319         __le32 status;
 320
 321         error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_STATUS,
 322                                               sizeof(status), (u8 *)&status);
 323         if (error < 0) {
 324                 dev_err(&client->dev, "Status read error %d\n", error);
 325                 return error;
 326         }
 327
 328         return le32_to_cpu(status);
 329 }
 330
 331 static int silead_ts_get_id(struct i2c_client *client)
 332 {
 333         struct silead_ts_data *data = i2c_get_clientdata(client);
 334         __le32 chip_id;
 335         int error;
 336
 337         error = i2c_smbus_read_i2c_block_data(client, SILEAD_REG_ID,
 338                                               sizeof(chip_id), (u8 *)&chip_id);
 339         if (error < 0)
 340                 return error;
 341
 342         data->chip_id = le32_to_cpu(chip_id);
 343         dev_info(&client->dev, "Silead chip ID: 0x%8X", data->chip_id);
 344
 345         return 0;
 346 }
 347
 348 static int silead_ts_setup(struct i2c_client *client)
 349 {
 350         int error;
 351         u32 status;
 352
 353         /*
 354          * Some buggy BIOS-es bring up the chip in a stuck state where it
 355          * blocks the I2C bus. The following steps are necessary to
 356          * unstuck the chip / bus:
 357          * 1. Turn off the Silead chip.
 358          * 2. Try to do an I2C transfer with the chip, this will fail in
 359          *    response to which the I2C-bus-driver will call:
 360          *    i2c_recover_bus() which will unstuck the I2C-bus. Note the
 361          *    unstuck-ing of the I2C bus only works if we first drop the
 362          *    chip off the bus by turning it off.
 363          * 3. Turn the chip back on.
 364          *
 365          * On the x86/ACPI systems were this problem is seen, step 1. and
 366          * 3. require making ACPI calls and dealing with ACPI Power
 367          * Resources. The workaround below runtime-suspends the chip to
 368          * turn it off, leaving it up to the ACPI subsystem to deal with
 369          * this.
 370          */
 371
 372         if (device_property_read_bool(&client->dev,
 373                                       "silead,stuck-controller-bug")) {
 374                 pm_runtime_set_active(&client->dev);
 375                 pm_runtime_enable(&client->dev);
 376                 pm_runtime_allow(&client->dev);
 377
 378                 pm_runtime_suspend(&client->dev);
 379
 380                 dev_warn(&client->dev, FW_BUG "Stuck I2C bus: please ignore the next 'controller timed out' error\n");
 381                 silead_ts_get_id(client);
 382
 383                 /* The forbid will also resume the device */
 384                 pm_runtime_forbid(&client->dev);
 385                 pm_runtime_disable(&client->dev);
 386         }
 387
 388         silead_ts_set_power(client, SILEAD_POWER_OFF);
 389         silead_ts_set_power(client, SILEAD_POWER_ON);
 390
 391         error = silead_ts_get_id(client);
 392         if (error) {
 393                 dev_err(&client->dev, "Chip ID read error %d\n", error);
 394                 return error;
 395         }
 396
 397         error = silead_ts_init(client);
 398         if (error)
 399                 return error;
 400
 401         error = silead_ts_reset(client);
 402         if (error)
 403                 return error;
 404
 405         error = silead_ts_load_fw(client);
 406         if (error)
 407                 return error;
 408
 409         error = silead_ts_startup(client);
 410         if (error)
 411                 return error;
 412
 413         status = silead_ts_get_status(client);
 414         if (status != SILEAD_STATUS_OK) {
 415                 dev_err(&client->dev,
 416                         "Initialization error, status: 0x%X\n", status);
 417                 return -ENODEV;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static irqreturn_t silead_ts_threaded_irq_handler(int irq, void *id)
 424 {
 425         struct silead_ts_data *data = id;
 426         struct i2c_client *client = data->client;
 427
 428         silead_ts_read_data(client);
 429
 430         return IRQ_HANDLED;
 431 }
 432
 433 static void silead_ts_read_props(struct i2c_client *client)
 434 {
 435         struct silead_ts_data *data = i2c_get_clientdata(client);
 436         struct device *dev = &client->dev;
 437         const char *str;
 438         int error;
 439
 440         error = device_property_read_u32(dev, "silead,max-fingers",
 441                                          &data->max_fingers);
 442         if (error) {
 443                 dev_dbg(dev, "Max fingers read error %d\n", error);
 444                 data->max_fingers = 5; /* Most devices handle up-to 5 fingers */
 445         }
 446
 447         error = device_property_read_string(dev, "firmware-name", &str);
 448         if (!error)
 449                 /*(DEBLOBBED)*/;
 450         else
 451                 dev_dbg(dev, "Firmware file name read error. Using default.");
 452 }
 453
 454 #ifdef CONFIG_ACPI
 455 static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
 456                                          const struct i2c_device_id *id)
 457 {
 458         const struct acpi_device_id *acpi_id;
 459         struct device *dev = &data->client->dev;
 460         int i;
 461
 462         if (ACPI_HANDLE(dev)) {
 463                 acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
 464                 if (!acpi_id)
 465                         return -ENODEV;
 466
 467                 snprintf(data->fw_name, sizeof(data->fw_name),
 468                          "/*(DEBLOBBED)*/", acpi_id->id);
 469
 470                 for (i = 0; i < strlen(data->fw_name); i++)
 471                         data->fw_name[i] = tolower(data->fw_name[i]);
 472         } else {
 473                 snprintf(data->fw_name, sizeof(data->fw_name),
 474                          "/*(DEBLOBBED)*/", id->name);
 475         }
 476
 477         return 0;
 478 }
 479 #else
 480 static int silead_ts_set_default_fw_name(struct silead_ts_data *data,
 481                                          const struct i2c_device_id *id)
 482 {
 483         snprintf(data->fw_name, sizeof(data->fw_name),
 484                  "/*(DEBLOBBED)*/", id->name);
 485         return 0;
 486 }
 487 #endif
 488
 489 static void silead_disable_regulator(void *arg)
 490 {
 491         struct silead_ts_data *data = arg;
 492
 493         regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
 494 }
 495
 496 static int silead_ts_probe(struct i2c_client *client,
 497                            const struct i2c_device_id *id)
 498 {
 499         struct silead_ts_data *data;
 500         struct device *dev = &client->dev;
 501         int error;
 502
 503         if (!i2c_check_functionality(client->adapter,
 504                                      I2C_FUNC_I2C |
 505                                      I2C_FUNC_SMBUS_READ_I2C_BLOCK |
 506                                      I2C_FUNC_SMBUS_WRITE_I2C_BLOCK)) {
 507                 dev_err(dev, "I2C functionality check failed\n");
 508                 return -ENXIO;
 509         }
 510
 511         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 512         if (!data)
 513                 return -ENOMEM;
 514
 515         i2c_set_clientdata(client, data);
 516         data->client = client;
 517
 518         error = silead_ts_set_default_fw_name(data, id);
 519         if (error)
 520                 return error;
 521
 522         silead_ts_read_props(client);
 523
 524         /* We must have the IRQ provided by DT or ACPI subsytem */
 525         if (client->irq <= 0)
 526                 return -ENODEV;
 527
 528         data->regulators[0].supply = "vddio";
 529         data->regulators[1].supply = "avdd";
 530         error = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->regulators),
 531                                         data->regulators);
 532         if (error)
 533                 return error;
 534
 535         /*
 536          * Enable regulators at probe and disable them at remove, we need
 537          * to keep the chip powered otherwise it forgets its firmware.
 538          */
 539         error = regulator_bulk_enable(ARRAY_SIZE(data->regulators),
 540                                       data->regulators);
 541         if (error)
 542                 return error;
 543
 544         error = devm_add_action_or_reset(dev, silead_disable_regulator, data);
 545         if (error)
 546                 return error;
 547
 548         /* Power GPIO pin */
 549         data->gpio_power = devm_gpiod_get_optional(dev, "power", GPIOD_OUT_LOW);
 550         if (IS_ERR(data->gpio_power)) {
 551                 if (PTR_ERR(data->gpio_power) != -EPROBE_DEFER)
 552                         dev_err(dev, "Shutdown GPIO request failed\n");
 553                 return PTR_ERR(data->gpio_power);
 554         }
 555
 556         error = silead_ts_setup(client);
 557         if (error)
 558                 return error;
 559
 560         error = silead_ts_request_input_dev(data);
 561         if (error)
 562                 return error;
 563
 564         error = devm_request_threaded_irq(dev, client->irq,
 565                                           NULL, silead_ts_threaded_irq_handler,
 566                                           IRQF_ONESHOT, client->name, data);
 567         if (error) {
 568                 if (error != -EPROBE_DEFER)
 569                         dev_err(dev, "IRQ request failed %d\n", error);
 570                 return error;
 571         }
 572
 573         return 0;
 574 }
 575
 576 static int __maybe_unused silead_ts_suspend(struct device *dev)
 577 {
 578         struct i2c_client *client = to_i2c_client(dev);
 579
 580         disable_irq(client->irq);
 581         silead_ts_set_power(client, SILEAD_POWER_OFF);
 582         return 0;
 583 }
 584
 585 static int __maybe_unused silead_ts_resume(struct device *dev)
 586 {
 587         struct i2c_client *client = to_i2c_client(dev);
 588         bool second_try = false;
 589         int error, status;
 590
 591         silead_ts_set_power(client, SILEAD_POWER_ON);
 592
 593  retry:
 594         error = silead_ts_reset(client);
 595         if (error)
 596                 return error;
 597
 598         if (second_try) {
 599                 error = silead_ts_load_fw(client);
 600                 if (error)
 601                         return error;
 602         }
 603
 604         error = silead_ts_startup(client);
 605         if (error)
 606                 return error;
 607
 608         status = silead_ts_get_status(client);
 609         if (status != SILEAD_STATUS_OK) {
 610                 if (!second_try) {
 611                         second_try = true;
 612                         dev_dbg(dev, "Reloading firmware after unsuccessful resume\n");
 613                         goto retry;
 614                 }
 615                 dev_err(dev, "Resume error, status: 0x%02x\n", status);
 616                 return -ENODEV;
 617         }
 618
 619         enable_irq(client->irq);
 620
 621         return 0;
 622 }
 623
 624 static SIMPLE_DEV_PM_OPS(silead_ts_pm, silead_ts_suspend, silead_ts_resume);
 625
 626 static const struct i2c_device_id silead_ts_id[] = {
 627         { "gsl1680", 0 },
 628         { "gsl1688", 0 },
 629         { "gsl3670", 0 },
 630         { "gsl3675", 0 },
 631         { "gsl3692", 0 },
 632         { "mssl1680", 0 },
 633         { }
 634 };
 635 MODULE_DEVICE_TABLE(i2c, silead_ts_id);
 636
 637 #ifdef CONFIG_ACPI
 638 static const struct acpi_device_id silead_ts_acpi_match[] = {
 639         { "GSL1680", 0 },
 640         { "GSL1688", 0 },
 641         { "GSL3670", 0 },
 642         { "GSL3675", 0 },
 643         { "GSL3692", 0 },
 644         { "MSSL1680", 0 },
 645         { "MSSL0001", 0 },
 646         { "MSSL0002", 0 },
 647         { "MSSL0017", 0 },
 648         { }
 649 };
 650 MODULE_DEVICE_TABLE(acpi, silead_ts_acpi_match);
 651 #endif
 652
 653 #ifdef CONFIG_OF
 654 static const struct of_device_id silead_ts_of_match[] = {
 655         { .compatible = "silead,gsl1680" },
 656         { .compatible = "silead,gsl1688" },
 657         { .compatible = "silead,gsl3670" },
 658         { .compatible = "silead,gsl3675" },
 659         { .compatible = "silead,gsl3692" },
 660         { },
 661 };
 662 MODULE_DEVICE_TABLE(of, silead_ts_of_match);
 663 #endif
 664
 665 static struct i2c_driver silead_ts_driver = {
 666         .probe = silead_ts_probe,
 667         .id_table = silead_ts_id,
 668         .driver = {
 669                 .name = SILEAD_TS_NAME,
 670                 .acpi_match_table = ACPI_PTR(silead_ts_acpi_match),
 671                 .of_match_table = of_match_ptr(silead_ts_of_match),
 672                 .pm = &silead_ts_pm,
 673         },
 674 };
 675 module_i2c_driver(silead_ts_driver);
 676
 677 MODULE_AUTHOR("Robert Dolca <robert.dolca@intel.com>");
 678 MODULE_DESCRIPTION("Silead I2C touchscreen driver");
 679 MODULE_LICENSE("GPL");