1 /* 2 * Driver for AUO in-cell touchscreens 3 * 4 * Copyright (c) 2011 Heiko Stuebner <heiko@sntech.de> 5 * 6 * loosely based on auo_touch.c from Dell Streak vendor-kernel 7 * 8 * Copyright (c) 2008 QUALCOMM Incorporated. 9 * Copyright (c) 2008 QUALCOMM USA, INC. 10 * 11 * 12 * This software is licensed under the terms of the GNU General Public 13 * License version 2, as published by the Free Software Foundation, and 14 * may be copied, distributed, and modified under those terms. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 */ 22 23 #include <linux/kernel.h> 24 #include <linux/module.h> 25 #include <linux/interrupt.h> 26 #include <linux/slab.h> 27 #include <linux/input.h> 28 #include <linux/jiffies.h> 29 #include <linux/i2c.h> 30 #include <linux/mutex.h> 31 #include <linux/delay.h> 32 #include <linux/gpio.h> 33 #include <linux/input/auo-pixcir-ts.h> 34 #include <linux/of.h> 35 #include <linux/of_gpio.h> 36 37 /* 38 * Coordinate calculation: 39 * X1 = X1_LSB + X1_MSB*256 40 * Y1 = Y1_LSB + Y1_MSB*256 41 * X2 = X2_LSB + X2_MSB*256 42 * Y2 = Y2_LSB + Y2_MSB*256 43 */ 44 #define AUO_PIXCIR_REG_X1_LSB 0x00 45 #define AUO_PIXCIR_REG_X1_MSB 0x01 46 #define AUO_PIXCIR_REG_Y1_LSB 0x02 47 #define AUO_PIXCIR_REG_Y1_MSB 0x03 48 #define AUO_PIXCIR_REG_X2_LSB 0x04 49 #define AUO_PIXCIR_REG_X2_MSB 0x05 50 #define AUO_PIXCIR_REG_Y2_LSB 0x06 51 #define AUO_PIXCIR_REG_Y2_MSB 0x07 52 53 #define AUO_PIXCIR_REG_STRENGTH 0x0d 54 #define AUO_PIXCIR_REG_STRENGTH_X1_LSB 0x0e 55 #define AUO_PIXCIR_REG_STRENGTH_X1_MSB 0x0f 56 57 #define AUO_PIXCIR_REG_RAW_DATA_X 0x2b 58 #define AUO_PIXCIR_REG_RAW_DATA_Y 0x4f 59 60 #define AUO_PIXCIR_REG_X_SENSITIVITY 0x6f 61 #define AUO_PIXCIR_REG_Y_SENSITIVITY 0x70 62 #define AUO_PIXCIR_REG_INT_SETTING 0x71 63 #define AUO_PIXCIR_REG_INT_WIDTH 0x72 64 #define AUO_PIXCIR_REG_POWER_MODE 0x73 65 66 #define AUO_PIXCIR_REG_VERSION 0x77 67 #define AUO_PIXCIR_REG_CALIBRATE 0x78 68 69 #define AUO_PIXCIR_REG_TOUCHAREA_X1 0x1e 70 #define AUO_PIXCIR_REG_TOUCHAREA_Y1 0x1f 71 #define AUO_PIXCIR_REG_TOUCHAREA_X2 0x20 72 #define AUO_PIXCIR_REG_TOUCHAREA_Y2 0x21 73 74 #define AUO_PIXCIR_REG_EEPROM_CALIB_X 0x42 75 #define AUO_PIXCIR_REG_EEPROM_CALIB_Y 0xad 76 77 #define AUO_PIXCIR_INT_TPNUM_MASK 0xe0 78 #define AUO_PIXCIR_INT_TPNUM_SHIFT 5 79 #define AUO_PIXCIR_INT_RELEASE (1 << 4) 80 #define AUO_PIXCIR_INT_ENABLE (1 << 3) 81 #define AUO_PIXCIR_INT_POL_HIGH (1 << 2) 82 #define AUO_PIXCIR_INT_MODE_MASK 0x03 83 84 /* 85 * Power modes: 86 * active: scan speed 60Hz 87 * sleep: scan speed 10Hz can be auto-activated, wakeup on 1st touch 88 * deep sleep: scan speed 1Hz can only be entered or left manually. 89 */ 90 #define AUO_PIXCIR_POWER_ACTIVE 0x00 91 #define AUO_PIXCIR_POWER_SLEEP 0x01 92 #define AUO_PIXCIR_POWER_DEEP_SLEEP 0x02 93 #define AUO_PIXCIR_POWER_MASK 0x03 94 95 #define AUO_PIXCIR_POWER_ALLOW_SLEEP (1 << 2) 96 #define AUO_PIXCIR_POWER_IDLE_TIME(ms) ((ms & 0xf) << 4) 97 98 #define AUO_PIXCIR_CALIBRATE 0x03 99 100 #define AUO_PIXCIR_EEPROM_CALIB_X_LEN 62 101 #define AUO_PIXCIR_EEPROM_CALIB_Y_LEN 36 102 103 #define AUO_PIXCIR_RAW_DATA_X_LEN 18 104 #define AUO_PIXCIR_RAW_DATA_Y_LEN 11 105 106 #define AUO_PIXCIR_STRENGTH_ENABLE (1 << 0) 107 108 /* Touchscreen absolute values */ 109 #define AUO_PIXCIR_REPORT_POINTS 2 110 #define AUO_PIXCIR_MAX_AREA 0xff 111 #define AUO_PIXCIR_PENUP_TIMEOUT_MS 10 112 113 struct auo_pixcir_ts { 114 struct i2c_client *client; 115 struct input_dev *input; 116 const struct auo_pixcir_ts_platdata *pdata; 117 char phys[32]; 118 119 /* special handling for touch_indicate interupt mode */ 120 bool touch_ind_mode; 121 122 wait_queue_head_t wait; 123 bool stopped; 124 }; 125 126 struct auo_point_t { 127 int coord_x; 128 int coord_y; 129 int area_major; 130 int area_minor; 131 int orientation; 132 }; 133 134 static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts, 135 struct auo_point_t *point) 136 { 137 struct i2c_client *client = ts->client; 138 const struct auo_pixcir_ts_platdata *pdata = ts->pdata; 139 uint8_t raw_coord[8]; 140 uint8_t raw_area[4]; 141 int i, ret; 142 143 /* touch coordinates */ 144 ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_X1_LSB, 145 8, raw_coord); 146 if (ret < 0) { 147 dev_err(&client->dev, "failed to read coordinate, %d\n", ret); 148 return ret; 149 } 150 151 /* touch area */ 152 ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_TOUCHAREA_X1, 153 4, raw_area); 154 if (ret < 0) { 155 dev_err(&client->dev, "could not read touch area, %d\n", ret); 156 return ret; 157 } 158 159 for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { 160 point[i].coord_x = 161 raw_coord[4 * i + 1] << 8 | raw_coord[4 * i]; 162 point[i].coord_y = 163 raw_coord[4 * i + 3] << 8 | raw_coord[4 * i + 2]; 164 165 if (point[i].coord_x > pdata->x_max || 166 point[i].coord_y > pdata->y_max) { 167 dev_warn(&client->dev, "coordinates (%d,%d) invalid\n", 168 point[i].coord_x, point[i].coord_y); 169 point[i].coord_x = point[i].coord_y = 0; 170 } 171 172 /* determine touch major, minor and orientation */ 173 point[i].area_major = max(raw_area[2 * i], raw_area[2 * i + 1]); 174 point[i].area_minor = min(raw_area[2 * i], raw_area[2 * i + 1]); 175 point[i].orientation = raw_area[2 * i] > raw_area[2 * i + 1]; 176 } 177 178 return 0; 179 } 180 181 static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id) 182 { 183 struct auo_pixcir_ts *ts = dev_id; 184 const struct auo_pixcir_ts_platdata *pdata = ts->pdata; 185 struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS]; 186 int i; 187 int ret; 188 int fingers = 0; 189 int abs = -1; 190 191 while (!ts->stopped) { 192 193 /* check for up event in touch touch_ind_mode */ 194 if (ts->touch_ind_mode) { 195 if (gpio_get_value(pdata->gpio_int) == 0) { 196 input_mt_sync(ts->input); 197 input_report_key(ts->input, BTN_TOUCH, 0); 198 input_sync(ts->input); 199 break; 200 } 201 } 202 203 ret = auo_pixcir_collect_data(ts, point); 204 if (ret < 0) { 205 /* we want to loop only in touch_ind_mode */ 206 if (!ts->touch_ind_mode) 207 break; 208 209 wait_event_timeout(ts->wait, ts->stopped, 210 msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); 211 continue; 212 } 213 214 for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) { 215 if (point[i].coord_x > 0 || point[i].coord_y > 0) { 216 input_report_abs(ts->input, ABS_MT_POSITION_X, 217 point[i].coord_x); 218 input_report_abs(ts->input, ABS_MT_POSITION_Y, 219 point[i].coord_y); 220 input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, 221 point[i].area_major); 222 input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, 223 point[i].area_minor); 224 input_report_abs(ts->input, ABS_MT_ORIENTATION, 225 point[i].orientation); 226 input_mt_sync(ts->input); 227 228 /* use first finger as source for singletouch */ 229 if (fingers == 0) 230 abs = i; 231 232 /* number of touch points could also be queried 233 * via i2c but would require an additional call 234 */ 235 fingers++; 236 } 237 } 238 239 input_report_key(ts->input, BTN_TOUCH, fingers > 0); 240 241 if (abs > -1) { 242 input_report_abs(ts->input, ABS_X, point[abs].coord_x); 243 input_report_abs(ts->input, ABS_Y, point[abs].coord_y); 244 } 245 246 input_sync(ts->input); 247 248 /* we want to loop only in touch_ind_mode */ 249 if (!ts->touch_ind_mode) 250 break; 251 252 wait_event_timeout(ts->wait, ts->stopped, 253 msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS)); 254 } 255 256 return IRQ_HANDLED; 257 } 258 259 /* 260 * Set the power mode of the device. 261 * Valid modes are 262 * - AUO_PIXCIR_POWER_ACTIVE 263 * - AUO_PIXCIR_POWER_SLEEP - automatically left on first touch 264 * - AUO_PIXCIR_POWER_DEEP_SLEEP 265 */ 266 static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode) 267 { 268 struct i2c_client *client = ts->client; 269 int ret; 270 271 ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE); 272 if (ret < 0) { 273 dev_err(&client->dev, "unable to read reg %Xh, %d\n", 274 AUO_PIXCIR_REG_POWER_MODE, ret); 275 return ret; 276 } 277 278 ret &= ~AUO_PIXCIR_POWER_MASK; 279 ret |= mode; 280 281 ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret); 282 if (ret) { 283 dev_err(&client->dev, "unable to write reg %Xh, %d\n", 284 AUO_PIXCIR_REG_POWER_MODE, ret); 285 return ret; 286 } 287 288 return 0; 289 } 290 291 static int auo_pixcir_int_config(struct auo_pixcir_ts *ts, 292 int int_setting) 293 { 294 struct i2c_client *client = ts->client; 295 const struct auo_pixcir_ts_platdata *pdata = ts->pdata; 296 int ret; 297 298 ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); 299 if (ret < 0) { 300 dev_err(&client->dev, "unable to read reg %Xh, %d\n", 301 AUO_PIXCIR_REG_INT_SETTING, ret); 302 return ret; 303 } 304 305 ret &= ~AUO_PIXCIR_INT_MODE_MASK; 306 ret |= int_setting; 307 ret |= AUO_PIXCIR_INT_POL_HIGH; /* always use high for interrupts */ 308 309 ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, 310 ret); 311 if (ret < 0) { 312 dev_err(&client->dev, "unable to write reg %Xh, %d\n", 313 AUO_PIXCIR_REG_INT_SETTING, ret); 314 return ret; 315 } 316 317 ts->touch_ind_mode = pdata->int_setting == AUO_PIXCIR_INT_TOUCH_IND; 318 319 return 0; 320 } 321 322 /* control the generation of interrupts on the device side */ 323 static int auo_pixcir_int_toggle(struct auo_pixcir_ts *ts, bool enable) 324 { 325 struct i2c_client *client = ts->client; 326 int ret; 327 328 ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING); 329 if (ret < 0) { 330 dev_err(&client->dev, "unable to read reg %Xh, %d\n", 331 AUO_PIXCIR_REG_INT_SETTING, ret); 332 return ret; 333 } 334 335 if (enable) 336 ret |= AUO_PIXCIR_INT_ENABLE; 337 else 338 ret &= ~AUO_PIXCIR_INT_ENABLE; 339 340 ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING, 341 ret); 342 if (ret < 0) { 343 dev_err(&client->dev, "unable to write reg %Xh, %d\n", 344 AUO_PIXCIR_REG_INT_SETTING, ret); 345 return ret; 346 } 347 348 return 0; 349 } 350 351 static int auo_pixcir_start(struct auo_pixcir_ts *ts) 352 { 353 struct i2c_client *client = ts->client; 354 int ret; 355 356 ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_ACTIVE); 357 if (ret < 0) { 358 dev_err(&client->dev, "could not set power mode, %d\n", 359 ret); 360 return ret; 361 } 362 363 ts->stopped = false; 364 mb(); 365 enable_irq(client->irq); 366 367 ret = auo_pixcir_int_toggle(ts, 1); 368 if (ret < 0) { 369 dev_err(&client->dev, "could not enable interrupt, %d\n", 370 ret); 371 disable_irq(client->irq); 372 return ret; 373 } 374 375 return 0; 376 } 377 378 static int auo_pixcir_stop(struct auo_pixcir_ts *ts) 379 { 380 struct i2c_client *client = ts->client; 381 int ret; 382 383 ret = auo_pixcir_int_toggle(ts, 0); 384 if (ret < 0) { 385 dev_err(&client->dev, "could not disable interrupt, %d\n", 386 ret); 387 return ret; 388 } 389 390 /* disable receiving of interrupts */ 391 disable_irq(client->irq); 392 ts->stopped = true; 393 mb(); 394 wake_up(&ts->wait); 395 396 return auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_DEEP_SLEEP); 397 } 398 399 static int auo_pixcir_input_open(struct input_dev *dev) 400 { 401 struct auo_pixcir_ts *ts = input_get_drvdata(dev); 402 403 return auo_pixcir_start(ts); 404 } 405 406 static void auo_pixcir_input_close(struct input_dev *dev) 407 { 408 struct auo_pixcir_ts *ts = input_get_drvdata(dev); 409 410 auo_pixcir_stop(ts); 411 } 412 413 static int __maybe_unused auo_pixcir_suspend(struct device *dev) 414 { 415 struct i2c_client *client = to_i2c_client(dev); 416 struct auo_pixcir_ts *ts = i2c_get_clientdata(client); 417 struct input_dev *input = ts->input; 418 int ret = 0; 419 420 mutex_lock(&input->mutex); 421 422 /* when configured as wakeup source, device should always wake system 423 * therefore start device if necessary 424 */ 425 if (device_may_wakeup(&client->dev)) { 426 /* need to start device if not open, to be wakeup source */ 427 if (!input->users) { 428 ret = auo_pixcir_start(ts); 429 if (ret) 430 goto unlock; 431 } 432 433 enable_irq_wake(client->irq); 434 ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP); 435 } else if (input->users) { 436 ret = auo_pixcir_stop(ts); 437 } 438 439 unlock: 440 mutex_unlock(&input->mutex); 441 442 return ret; 443 } 444 445 static int __maybe_unused auo_pixcir_resume(struct device *dev) 446 { 447 struct i2c_client *client = to_i2c_client(dev); 448 struct auo_pixcir_ts *ts = i2c_get_clientdata(client); 449 struct input_dev *input = ts->input; 450 int ret = 0; 451 452 mutex_lock(&input->mutex); 453 454 if (device_may_wakeup(&client->dev)) { 455 disable_irq_wake(client->irq); 456 457 /* need to stop device if it was not open on suspend */ 458 if (!input->users) { 459 ret = auo_pixcir_stop(ts); 460 if (ret) 461 goto unlock; 462 } 463 464 /* device wakes automatically from SLEEP */ 465 } else if (input->users) { 466 ret = auo_pixcir_start(ts); 467 } 468 469 unlock: 470 mutex_unlock(&input->mutex); 471 472 return ret; 473 } 474 475 static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops, 476 auo_pixcir_suspend, auo_pixcir_resume); 477 478 #ifdef CONFIG_OF 479 static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) 480 { 481 struct auo_pixcir_ts_platdata *pdata; 482 struct device_node *np = dev->of_node; 483 484 if (!np) 485 return ERR_PTR(-ENOENT); 486 487 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 488 if (!pdata) 489 return ERR_PTR(-ENOMEM); 490 491 pdata->gpio_int = of_get_gpio(np, 0); 492 if (!gpio_is_valid(pdata->gpio_int)) { 493 dev_err(dev, "failed to get interrupt gpio\n"); 494 return ERR_PTR(-EINVAL); 495 } 496 497 pdata->gpio_rst = of_get_gpio(np, 1); 498 if (!gpio_is_valid(pdata->gpio_rst)) { 499 dev_err(dev, "failed to get reset gpio\n"); 500 return ERR_PTR(-EINVAL); 501 } 502 503 if (of_property_read_u32(np, "x-size", &pdata->x_max)) { 504 dev_err(dev, "failed to get x-size property\n"); 505 return ERR_PTR(-EINVAL); 506 } 507 508 if (of_property_read_u32(np, "y-size", &pdata->y_max)) { 509 dev_err(dev, "failed to get y-size property\n"); 510 return ERR_PTR(-EINVAL); 511 } 512 513 /* default to asserting the interrupt when the screen is touched */ 514 pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND; 515 516 return pdata; 517 } 518 #else 519 static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev) 520 { 521 return ERR_PTR(-EINVAL); 522 } 523 #endif 524 525 static void auo_pixcir_reset(void *data) 526 { 527 struct auo_pixcir_ts *ts = data; 528 529 gpio_set_value(ts->pdata->gpio_rst, 0); 530 } 531 532 static int auo_pixcir_probe(struct i2c_client *client, 533 const struct i2c_device_id *id) 534 { 535 const struct auo_pixcir_ts_platdata *pdata; 536 struct auo_pixcir_ts *ts; 537 struct input_dev *input_dev; 538 int version; 539 int error; 540 541 pdata = dev_get_platdata(&client->dev); 542 if (!pdata) { 543 pdata = auo_pixcir_parse_dt(&client->dev); 544 if (IS_ERR(pdata)) 545 return PTR_ERR(pdata); 546 } 547 548 ts = devm_kzalloc(&client->dev, 549 sizeof(struct auo_pixcir_ts), GFP_KERNEL); 550 if (!ts) 551 return -ENOMEM; 552 553 input_dev = devm_input_allocate_device(&client->dev); 554 if (!input_dev) { 555 dev_err(&client->dev, "could not allocate input device\n"); 556 return -ENOMEM; 557 } 558 559 ts->pdata = pdata; 560 ts->client = client; 561 ts->input = input_dev; 562 ts->touch_ind_mode = 0; 563 ts->stopped = true; 564 init_waitqueue_head(&ts->wait); 565 566 snprintf(ts->phys, sizeof(ts->phys), 567 "%s/input0", dev_name(&client->dev)); 568 569 input_dev->name = "AUO-Pixcir touchscreen"; 570 input_dev->phys = ts->phys; 571 input_dev->id.bustype = BUS_I2C; 572 573 input_dev->open = auo_pixcir_input_open; 574 input_dev->close = auo_pixcir_input_close; 575 576 __set_bit(EV_ABS, input_dev->evbit); 577 __set_bit(EV_KEY, input_dev->evbit); 578 579 __set_bit(BTN_TOUCH, input_dev->keybit); 580 581 /* For single touch */ 582 input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0); 583 input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0); 584 585 /* For multi touch */ 586 input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, 587 pdata->x_max, 0, 0); 588 input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, 589 pdata->y_max, 0, 0); 590 input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 591 AUO_PIXCIR_MAX_AREA, 0, 0); 592 input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0, 593 AUO_PIXCIR_MAX_AREA, 0, 0); 594 input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0); 595 596 input_set_drvdata(ts->input, ts); 597 598 error = devm_gpio_request_one(&client->dev, pdata->gpio_int, 599 GPIOF_DIR_IN, "auo_pixcir_ts_int"); 600 if (error) { 601 dev_err(&client->dev, "request of gpio %d failed, %d\n", 602 pdata->gpio_int, error); 603 return error; 604 } 605 606 error = devm_gpio_request_one(&client->dev, pdata->gpio_rst, 607 GPIOF_DIR_OUT | GPIOF_INIT_HIGH, 608 "auo_pixcir_ts_rst"); 609 if (error) { 610 dev_err(&client->dev, "request of gpio %d failed, %d\n", 611 pdata->gpio_rst, error); 612 return error; 613 } 614 615 error = devm_add_action(&client->dev, auo_pixcir_reset, ts); 616 if (error) { 617 auo_pixcir_reset(ts); 618 dev_err(&client->dev, "failed to register reset action, %d\n", 619 error); 620 return error; 621 } 622 623 msleep(200); 624 625 version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION); 626 if (version < 0) { 627 error = version; 628 return error; 629 } 630 631 dev_info(&client->dev, "firmware version 0x%X\n", version); 632 633 error = auo_pixcir_int_config(ts, pdata->int_setting); 634 if (error) 635 return error; 636 637 error = devm_request_threaded_irq(&client->dev, client->irq, 638 NULL, auo_pixcir_interrupt, 639 IRQF_TRIGGER_RISING | IRQF_ONESHOT, 640 input_dev->name, ts); 641 if (error) { 642 dev_err(&client->dev, "irq %d requested failed, %d\n", 643 client->irq, error); 644 return error; 645 } 646 647 /* stop device and put it into deep sleep until it is opened */ 648 error = auo_pixcir_stop(ts); 649 if (error) 650 return error; 651 652 error = input_register_device(input_dev); 653 if (error) { 654 dev_err(&client->dev, "could not register input device, %d\n", 655 error); 656 return error; 657 } 658 659 i2c_set_clientdata(client, ts); 660 661 return 0; 662 } 663 664 static const struct i2c_device_id auo_pixcir_idtable[] = { 665 { "auo_pixcir_ts", 0 }, 666 { } 667 }; 668 MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable); 669 670 #ifdef CONFIG_OF 671 static const struct of_device_id auo_pixcir_ts_dt_idtable[] = { 672 { .compatible = "auo,auo_pixcir_ts" }, 673 {}, 674 }; 675 MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable); 676 #endif 677 678 static struct i2c_driver auo_pixcir_driver = { 679 .driver = { 680 .name = "auo_pixcir_ts", 681 .pm = &auo_pixcir_pm_ops, 682 .of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable), 683 }, 684 .probe = auo_pixcir_probe, 685 .id_table = auo_pixcir_idtable, 686 }; 687 688 module_i2c_driver(auo_pixcir_driver); 689 690 MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver"); 691 MODULE_LICENSE("GPL v2"); 692 MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>"); 693