1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for AUO in-cell touchscreens 4 * 5 * Copyright (c) 2011 Heiko Stuebner <heiko@sntech.de> 6 * 7 * loosely based on auo_touch.c from Dell Streak vendor-kernel 8 * 9 * Copyright (c) 2008 QUALCOMM Incorporated. 10 * Copyright (c) 2008 QUALCOMM USA, INC. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/interrupt.h> 16 #include <linux/slab.h> 17 #include <linux/input.h> 18 #include <linux/jiffies.h> 19 #include <linux/i2c.h> 20 #include <linux/mutex.h> 21 #include <linux/delay.h> 22 #include <linux/gpio.h> 23 #include <linux/input/auo-pixcir-ts.h> 24 #include <linux/of.h> 25 #include <linux/of_gpio.h> 26 27 /* 28 * Coordinate calculation: 29 * X1 = X1_LSB + X1_MSB*256 30 * Y1 = Y1_LSB + Y1_MSB*256 31 * X2 = X2_LSB + X2_MSB*256 32 * Y2 = Y2_LSB + Y2_MSB*256 33 */ 34 #define AUO_PIXCIR_REG_X1_LSB 0x00 35 #define AUO_PIXCIR_REG_X1_MSB 0x01 36 #define AUO_PIXCIR_REG_Y1_LSB 0x02 37 #define AUO_PIXCIR_REG_Y1_MSB 0x03 38 #define AUO_PIXCIR_REG_X2_LSB 0x04 39 #define AUO_PIXCIR_REG_X2_MSB 0x05 40 #define AUO_PIXCIR_REG_Y2_LSB 0x06 41 #define AUO_PIXCIR_REG_Y2_MSB 0x07 42 43 #define AUO_PIXCIR_REG_STRENGTH 0x0d 44 #define AUO_PIXCIR_REG_STRENGTH_X1_LSB 0x0e 45 #define AUO_PIXCIR_REG_STRENGTH_X1_MSB 0x0f 46 47 #define AUO_PIXCIR_REG_RAW_DATA_X 0x2b 48 #define AUO_PIXCIR_REG_RAW_DATA_Y 0x4f 49 50 #define AUO_PIXCIR_REG_X_SENSITIVITY 0x6f 51 #define AUO_PIXCIR_REG_Y_SENSITIVITY 0x70 52 #define AUO_PIXCIR_REG_INT_SETTING 0x71 53 #define AUO_PIXCIR_REG_INT_WIDTH 0x72 54 #define AUO_PIXCIR_REG_POWER_MODE 0x73 55 56 #define AUO_PIXCIR_REG_VERSION 0x77 57 #define AUO_PIXCIR_REG_CALIBRATE 0x78 58 59 #define AUO_PIXCIR_REG_TOUCHAREA_X1 0x1e 60 #define AUO_PIXCIR_REG_TOUCHAREA_Y1 0x1f 61 #define AUO_PIXCIR_REG_TOUCHAREA_X2 0x20 62 #define AUO_PIXCIR_REG_TOUCHAREA_Y2 0x21 63 64 #define AUO_PIXCIR_REG_EEPROM_CALIB_X 0x42 65 #define AUO_PIXCIR_REG_EEPROM_CALIB_Y 0xad 66 67 #define AUO_PIXCIR_INT_TPNUM_MASK 0xe0 68 #define AUO_PIXCIR_INT_TPNUM_SHIFT 5 69 #define AUO_PIXCIR_INT_RELEASE (1 << 4) 70 #define AUO_PIXCIR_INT_ENABLE (1 << 3) 71 #define AUO_PIXCIR_INT_POL_HIGH (1 << 2) 72 #define AUO_PIXCIR_INT_MODE_MASK 0x03 73 74 /* 75 * Power modes: 76 * active: scan speed 60Hz 77 * sleep: scan speed 10Hz can be auto-activated, wakeup on 1st touch 78 * deep sleep: scan speed 1Hz can only be entered or left manually. 79 */ 80 #define AUO_PIXCIR_POWER_ACTIVE 0x00 81 #define AUO_PIXCIR_POWER_SLEEP 0x01 82 #define AUO_PIXCIR_POWER_DEEP_SLEEP 0x02 83 #define AUO_PIXCIR_POWER_MASK 0x03 84 85 #define AUO_PIXCIR_POWER_ALLOW_SLEEP (1 << 2) 86 #define AUO_PIXCIR_POWER_IDLE_TIME(ms) ((ms & 0xf) << 4) 87 88 #define AUO_PIXCIR_CALIBRATE 0x03 89 90 #define AUO_PIXCIR_EEPROM_CALIB_X_LEN 62 91 #define AUO_PIXCIR_EEPROM_CALIB_Y_LEN 36 92 93 #define AUO_PIXCIR_RAW_DATA_X_LEN 18 94 #define AUO_PIXCIR_RAW_DATA_Y_LEN 11 95 96 #define AUO_PIXCIR_STRENGTH_ENABLE (1 << 0) 97 98 /* Touchscreen absolute values */ 99 #define AUO_PIXCIR_REPORT_POINTS 2 100 #define AUO_PIXCIR_MAX_AREA 0xff 101 #define AUO_PIXCIR_PENUP_TIMEOUT_MS 10 102 103 struct auo_pixcir_ts { 104 struct i2c_client *client; 105 struct input_dev *input; 106 const struct auo_pixcir_ts_platdata *pdata; 107 char phys[32]; 108 109 /* special handling for touch_indicate interupt mode */ 110 bool touch_ind_mode; 111 112 wait_queue_head_t wait; 113 bool stopped; 114 }; 115 116 struct auo_point_t { 117 int coord_x; 118 int coord_y; 119 int area_major; 120 int area_minor; 121 int orientation; 122 }; 123 124 static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts, 125 struct auo_point_t *point) 126 { 127 struct i2c_client *client = ts->client; 128 const struct auo_pixcir_ts_platdata *pdata = ts->pdata; 129 uint8_t raw_coord[8]; 130 uint8_t raw_area[4]; 131 int i, ret; 132 133 /* touch coordinates */ 134 ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_X1_LSB, 135 8, raw_coord); 136 if (ret < 0) { 137 dev_err(&client->dev, "failed to read coordinate, %d\n", ret); 138 return ret; 139 } 140 141 /* touch area */ 142 ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_TOUCHAREA_X1, 143 4, raw_area); 144 if (ret < 0) { 145 dev_err(&client->dev, "could not read touch area, %d\n", ret); 146 return ret; 147 } 148 149 for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { 150 point[i].coord_x = 151 raw_coord[4 * i + 1] << 8 | raw_coord[4 * i]; 152 point[i].coord_y = 153 raw_coord[4 * i + 3] << 8 | raw_coord[4 * i + 2]; 154 155 if (point[i].coord_x > pdata->x_max || 156 point[i].coord_y > pdata->y_max) { 157 dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", 158 point[i].coord_x, point[i].coord_y); 159 point[i].coord_x = point[i].coord_y = 0; 160 } 161 162 /* determine touch major, minor and orientation */ 163 point[i].area_major = max(raw_area[2 * i], raw_area[2 * i + 1]); 164 point[i].area_minor = min(raw_area[2 * i], raw_area[2 * i + 1]); 165 point[i].orientation = raw_area[2 * i] > raw_area[2 * i + 1]; 166 } 167 168 return 0; 169 } 170 171 static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id) 172 { 173 struct auo_pixcir_ts *ts = dev_id; 174 const struct auo_pixcir_ts_platdata *pdata = ts->pdata; 175 struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS]; 176 int i; 177 int ret; 178 int fingers = 0; 179 int abs = -1; 180 181 while (!ts->stopped) { 182 183 /* check for up event in touch touch_ind_mode */ 184 if (ts->touch_ind_mode) { 185 if (gpio_get_value(pdata->gpio_int) == 0) { 186 input_mt_sync(ts->input); 187 input_report_key(ts->input, BTN_TOUCH, 0); 188 input_sync(ts->input); 189 break; 190 } 191 } 192 193 ret = auo_pixcir_collect_data(ts, point); 194 if (ret < 0) { 195 /* we want to loop only in touch_ind_mode */ 196 if (!ts->touch_ind_mode) 197 break; 198 199 wait_event_timeout(ts->wait, ts->stopped, 200 msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); 201 continue; 202 } 203 204 for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { 205 if (point[i].coord_x > 0 || point[i].coord_y > 0) { 206 input_report_abs(ts->input, ABS_MT_POSITION_X, 207 point[i].coord_x); 208 input_report_abs(ts->input, ABS_MT_POSITION_Y, 209 point[i].coord_y); 210 input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 211 point[i].area_major); 212 input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 213 point[i].area_minor); 214 input_report_abs(ts->input, ABS_MT_ORIENTATION, 215 point[i].orientation); 216 input_mt_sync(ts->input); 217 218 /* use first finger as source for singletouch */ 219 if (fingers == 0) 220 abs = i; 221 222 /* number of touch points could also be queried 223 * via i2c but would require an additional call 224 */ 225 fingers++; 226 } 227 } 228 229 input_report_key(ts->input, BTN_TOUCH, fingers > 0); 230 231 if (abs > -1) { 232 input_report_abs(ts->input, ABS_X, point[abs].coord_x); 233 input_report_abs(ts->input, ABS_Y, point[abs].coord_y); 234 } 235 236 input_sync(ts->input); 237 238 /* we want to loop only in touch_ind_mode */ 239 if (!ts->touch_ind_mode) 240 break; 241 242 wait_event_timeout(ts->wait, ts->stopped, 243 msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); 244 } 245 246 return IRQ_HANDLED; 247 } 248 249 /* 250 * Set the power mode of the device. 251 * Valid modes are 252 * - AUO_PIXCIR_POWER_ACTIVE 253 * - AUO_PIXCIR_POWER_SLEEP - automatically left on first touch 254 * - AUO_PIXCIR_POWER_DEEP_SLEEP 255 */ 256 static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode) 257 { 258 struct i2c_client *client = ts->client; 259 int ret; 260 261 ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE); 262 if (ret < 0) { 263 dev_err(&client->dev, "unable to read reg %Xh, %d\n", 264 AUO_PIXCIR_REG_POWER_MODE, ret); 265 return ret; 266 } 267 268 ret &= ~AUO_PIXCIR_POWER_MASK; 269 ret |= mode; 270 271 ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret); 272 if (ret) { 273 dev_err(&client->dev, "unable to write reg %Xh, %d\n", 274 AUO_PIXCIR_REG_POWER_MODE, ret); 275 return ret; 276 } 277 278 return 0; 279 } 280 281 static int auo_pixcir_int_config(struct auo_pixcir_ts *ts, 282 int int_setting) 283 { 284 struct i2c_client *client = ts->client; 285 const struct auo_pixcir_ts_platdata *pdata = ts->pdata; 286 int ret; 287 288 ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); 289 if (ret < 0) { 290 dev_err(&client->dev, "unable to read reg %Xh, %d\n", 291 AUO_PIXCIR_REG_INT_SETTING, ret); 292 return ret; 293 } 294 295 ret &= ~AUO_PIXCIR_INT_MODE_MASK; 296 ret |= int_setting; 297 ret |= AUO_PIXCIR_INT_POL_HIGH; /* always use high for interrupts */ 298 299 ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, 300 ret); 301 if (ret < 0) { 302 dev_err(&client->dev, "unable to write reg %Xh, %d\n", 303 AUO_PIXCIR_REG_INT_SETTING, ret); 304 return ret; 305 } 306 307 ts->touch_ind_mode = pdata->int_setting == AUO_PIXCIR_INT_TOUCH_IND; 308 309 return 0; 310 } 311 312 /* control the generation of interrupts on the device side */ 313 static int auo_pixcir_int_toggle(struct auo_pixcir_ts *ts, bool enable) 314 { 315 struct i2c_client *client = ts->client; 316 int ret; 317 318 ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); 319 if (ret < 0) { 320 dev_err(&client->dev, "unable to read reg %Xh, %d\n", 321 AUO_PIXCIR_REG_INT_SETTING, ret); 322 return ret; 323 } 324 325 if (enable) 326 ret |= AUO_PIXCIR_INT_ENABLE; 327 else 328 ret &= ~AUO_PIXCIR_INT_ENABLE; 329 330 ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, 331 ret); 332 if (ret < 0) { 333 dev_err(&client->dev, "unable to write reg %Xh, %d\n", 334 AUO_PIXCIR_REG_INT_SETTING, ret); 335 return ret; 336 } 337 338 return 0; 339 } 340 341 static int auo_pixcir_start(struct auo_pixcir_ts *ts) 342 { 343 struct i2c_client *client = ts->client; 344 int ret; 345 346 ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_ACTIVE); 347 if (ret < 0) { 348 dev_err(&client->dev, "could not set power mode, %d\n", 349 ret); 350 return ret; 351 } 352 353 ts->stopped = false; 354 mb(); 355 enable_irq(client->irq); 356 357 ret = auo_pixcir_int_toggle(ts, 1); 358 if (ret < 0) { 359 dev_err(&client->dev, "could not enable interrupt, %d\n", 360 ret); 361 disable_irq(client->irq); 362 return ret; 363 } 364 365 return 0; 366 } 367 368 static int auo_pixcir_stop(struct auo_pixcir_ts *ts) 369 { 370 struct i2c_client *client = ts->client; 371 int ret; 372 373 ret = auo_pixcir_int_toggle(ts, 0); 374 if (ret < 0) { 375 dev_err(&client->dev, "could not disable interrupt, %d\n", 376 ret); 377 return ret; 378 } 379 380 /* disable receiving of interrupts */ 381 disable_irq(client->irq); 382 ts->stopped = true; 383 mb(); 384 wake_up(&ts->wait); 385 386 return auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_DEEP_SLEEP); 387 } 388 389 static int auo_pixcir_input_open(struct input_dev *dev) 390 { 391 struct auo_pixcir_ts *ts = input_get_drvdata(dev); 392 393 return auo_pixcir_start(ts); 394 } 395 396 static void auo_pixcir_input_close(struct input_dev *dev) 397 { 398 struct auo_pixcir_ts *ts = input_get_drvdata(dev); 399 400 auo_pixcir_stop(ts); 401 } 402 403 static int __maybe_unused auo_pixcir_suspend(struct device *dev) 404 { 405 struct i2c_client *client = to_i2c_client(dev); 406 struct auo_pixcir_ts *ts = i2c_get_clientdata(client); 407 struct input_dev *input = ts->input; 408 int ret = 0; 409 410 mutex_lock(&input->mutex); 411 412 /* when configured as wakeup source, device should always wake system 413 * therefore start device if necessary 414 */ 415 if (device_may_wakeup(&client->dev)) { 416 /* need to start device if not open, to be wakeup source */ 417 if (!input->users) { 418 ret = auo_pixcir_start(ts); 419 if (ret) 420 goto unlock; 421 } 422 423 enable_irq_wake(client->irq); 424 ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP); 425 } else if (input->users) { 426 ret = auo_pixcir_stop(ts); 427 } 428 429 unlock: 430 mutex_unlock(&input->mutex); 431 432 return ret; 433 } 434 435 static int __maybe_unused auo_pixcir_resume(struct device *dev) 436 { 437 struct i2c_client *client = to_i2c_client(dev); 438 struct auo_pixcir_ts *ts = i2c_get_clientdata(client); 439 struct input_dev *input = ts->input; 440 int ret = 0; 441 442 mutex_lock(&input->mutex); 443 444 if (device_may_wakeup(&client->dev)) { 445 disable_irq_wake(client->irq); 446 447 /* need to stop device if it was not open on suspend */ 448 if (!input->users) { 449 ret = auo_pixcir_stop(ts); 450 if (ret) 451 goto unlock; 452 } 453 454 /* device wakes automatically from SLEEP */ 455 } else if (input->users) { 456 ret = auo_pixcir_start(ts); 457 } 458 459 unlock: 460 mutex_unlock(&input->mutex); 461 462 return ret; 463 } 464 465 static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops, 466 auo_pixcir_suspend, auo_pixcir_resume); 467 468 #ifdef CONFIG_OF 469 static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) 470 { 471 struct auo_pixcir_ts_platdata *pdata; 472 struct device_node *np = dev->of_node; 473 474 if (!np) 475 return ERR_PTR(-ENOENT); 476 477 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 478 if (!pdata) 479 return ERR_PTR(-ENOMEM); 480 481 pdata->gpio_int = of_get_gpio(np, 0); 482 if (!gpio_is_valid(pdata->gpio_int)) { 483 dev_err(dev, "failed to get interrupt gpio\n"); 484 return ERR_PTR(-EINVAL); 485 } 486 487 pdata->gpio_rst = of_get_gpio(np, 1); 488 if (!gpio_is_valid(pdata->gpio_rst)) { 489 dev_err(dev, "failed to get reset gpio\n"); 490 return ERR_PTR(-EINVAL); 491 } 492 493 if (of_property_read_u32(np, "x-size", &pdata->x_max)) { 494 dev_err(dev, "failed to get x-size property\n"); 495 return ERR_PTR(-EINVAL); 496 } 497 498 if (of_property_read_u32(np, "y-size", &pdata->y_max)) { 499 dev_err(dev, "failed to get y-size property\n"); 500 return ERR_PTR(-EINVAL); 501 } 502 503 /* default to asserting the interrupt when the screen is touched */ 504 pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND; 505 506 return pdata; 507 } 508 #else 509 static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) 510 { 511 return ERR_PTR(-EINVAL); 512 } 513 #endif 514 515 static void auo_pixcir_reset(void *data) 516 { 517 struct auo_pixcir_ts *ts = data; 518 519 gpio_set_value(ts->pdata->gpio_rst, 0); 520 } 521 522 static int auo_pixcir_probe(struct i2c_client *client, 523 const struct i2c_device_id *id) 524 { 525 const struct auo_pixcir_ts_platdata *pdata; 526 struct auo_pixcir_ts *ts; 527 struct input_dev *input_dev; 528 int version; 529 int error; 530 531 pdata = dev_get_platdata(&client->dev); 532 if (!pdata) { 533 pdata = auo_pixcir_parse_dt(&client->dev); 534 if (IS_ERR(pdata)) 535 return PTR_ERR(pdata); 536 } 537 538 ts = devm_kzalloc(&client->dev, 539 sizeof(struct auo_pixcir_ts), GFP_KERNEL); 540 if (!ts) 541 return -ENOMEM; 542 543 input_dev = devm_input_allocate_device(&client->dev); 544 if (!input_dev) { 545 dev_err(&client->dev, "could not allocate input device\n"); 546 return -ENOMEM; 547 } 548 549 ts->pdata = pdata; 550 ts->client = client; 551 ts->input = input_dev; 552 ts->touch_ind_mode = 0; 553 ts->stopped = true; 554 init_waitqueue_head(&ts->wait); 555 556 snprintf(ts->phys, sizeof(ts->phys), 557 "%s/input0", dev_name(&client->dev)); 558 559 input_dev->name = "AUO-Pixcir touchscreen"; 560 input_dev->phys = ts->phys; 561 input_dev->id.bustype = BUS_I2C; 562 563 input_dev->open = auo_pixcir_input_open; 564 input_dev->close = auo_pixcir_input_close; 565 566 __set_bit(EV_ABS, input_dev->evbit); 567 __set_bit(EV_KEY, input_dev->evbit); 568 569 __set_bit(BTN_TOUCH, input_dev->keybit); 570 571 /* For single touch */ 572 input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0); 573 input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0); 574 575 /* For multi touch */ 576 input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, 577 pdata->x_max, 0, 0); 578 input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, 579 pdata->y_max, 0, 0); 580 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 581 AUO_PIXCIR_MAX_AREA, 0, 0); 582 input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, 583 AUO_PIXCIR_MAX_AREA, 0, 0); 584 input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); 585 586 input_set_drvdata(ts->input, ts); 587 588 error = devm_gpio_request_one(&client->dev, pdata->gpio_int, 589 GPIOF_DIR_IN, "auo_pixcir_ts_int"); 590 if (error) { 591 dev_err(&client->dev, "request of gpio %d failed, %d\n", 592 pdata->gpio_int, error); 593 return error; 594 } 595 596 error = devm_gpio_request_one(&client->dev, pdata->gpio_rst, 597 GPIOF_DIR_OUT | GPIOF_INIT_HIGH, 598 "auo_pixcir_ts_rst"); 599 if (error) { 600 dev_err(&client->dev, "request of gpio %d failed, %d\n", 601 pdata->gpio_rst, error); 602 return error; 603 } 604 605 error = devm_add_action_or_reset(&client->dev, auo_pixcir_reset, ts); 606 if (error) { 607 dev_err(&client->dev, "failed to register reset action, %d\n", 608 error); 609 return error; 610 } 611 612 msleep(200); 613 614 version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION); 615 if (version < 0) { 616 error = version; 617 return error; 618 } 619 620 dev_info(&client->dev, "firmware version 0x%X\n", version); 621 622 error = auo_pixcir_int_config(ts, pdata->int_setting); 623 if (error) 624 return error; 625 626 error = devm_request_threaded_irq(&client->dev, client->irq, 627 NULL, auo_pixcir_interrupt, 628 IRQF_TRIGGER_RISING | IRQF_ONESHOT, 629 input_dev->name, ts); 630 if (error) { 631 dev_err(&client->dev, "irq %d requested failed, %d\n", 632 client->irq, error); 633 return error; 634 } 635 636 /* stop device and put it into deep sleep until it is opened */ 637 error = auo_pixcir_stop(ts); 638 if (error) 639 return error; 640 641 error = input_register_device(input_dev); 642 if (error) { 643 dev_err(&client->dev, "could not register input device, %d\n", 644 error); 645 return error; 646 } 647 648 i2c_set_clientdata(client, ts); 649 650 return 0; 651 } 652 653 static const struct i2c_device_id auo_pixcir_idtable[] = { 654 { "auo_pixcir_ts", 0 }, 655 { } 656 }; 657 MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable); 658 659 #ifdef CONFIG_OF 660 static const struct of_device_id auo_pixcir_ts_dt_idtable[] = { 661 { .compatible = "auo,auo_pixcir_ts" }, 662 {}, 663 }; 664 MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable); 665 #endif 666 667 static struct i2c_driver auo_pixcir_driver = { 668 .driver = { 669 .name = "auo_pixcir_ts", 670 .pm = &auo_pixcir_pm_ops, 671 .of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable), 672 }, 673 .probe = auo_pixcir_probe, 674 .id_table = auo_pixcir_idtable, 675 }; 676 677 module_i2c_driver(auo_pixcir_driver); 678 679 MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver"); 680 MODULE_LICENSE("GPL v2"); 681 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); 682