1 /* 2 * Copyright 2013 Freescale Semiconductor, Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 */ 9 10 #include <linux/clk.h> 11 #include <linux/cpu_cooling.h> 12 #include <linux/delay.h> 13 #include <linux/device.h> 14 #include <linux/init.h> 15 #include <linux/interrupt.h> 16 #include <linux/io.h> 17 #include <linux/kernel.h> 18 #include <linux/mfd/syscon.h> 19 #include <linux/module.h> 20 #include <linux/of.h> 21 #include <linux/of_device.h> 22 #include <linux/platform_device.h> 23 #include <linux/regmap.h> 24 #include <linux/slab.h> 25 #include <linux/thermal.h> 26 #include <linux/types.h> 27 28 #define REG_SET 0x4 29 #define REG_CLR 0x8 30 #define REG_TOG 0xc 31 32 #define MISC0 0x0150 33 #define MISC0_REFTOP_SELBIASOFF (1 << 3) 34 #define MISC1 0x0160 35 #define MISC1_IRQ_TEMPHIGH (1 << 29) 36 /* Below LOW and PANIC bits are only for TEMPMON_IMX6SX */ 37 #define MISC1_IRQ_TEMPLOW (1 << 28) 38 #define MISC1_IRQ_TEMPPANIC (1 << 27) 39 40 #define TEMPSENSE0 0x0180 41 #define TEMPSENSE0_ALARM_VALUE_SHIFT 20 42 #define TEMPSENSE0_ALARM_VALUE_MASK (0xfff << TEMPSENSE0_ALARM_VALUE_SHIFT) 43 #define TEMPSENSE0_TEMP_CNT_SHIFT 8 44 #define TEMPSENSE0_TEMP_CNT_MASK (0xfff << TEMPSENSE0_TEMP_CNT_SHIFT) 45 #define TEMPSENSE0_FINISHED (1 << 2) 46 #define TEMPSENSE0_MEASURE_TEMP (1 << 1) 47 #define TEMPSENSE0_POWER_DOWN (1 << 0) 48 49 #define TEMPSENSE1 0x0190 50 #define TEMPSENSE1_MEASURE_FREQ 0xffff 51 /* Below TEMPSENSE2 is only for TEMPMON_IMX6SX */ 52 #define TEMPSENSE2 0x0290 53 #define TEMPSENSE2_LOW_VALUE_SHIFT 0 54 #define TEMPSENSE2_LOW_VALUE_MASK 0xfff 55 #define TEMPSENSE2_PANIC_VALUE_SHIFT 16 56 #define TEMPSENSE2_PANIC_VALUE_MASK 0xfff0000 57 58 #define OCOTP_ANA1 0x04e0 59 60 /* The driver supports 1 passive trip point and 1 critical trip point */ 61 enum imx_thermal_trip { 62 IMX_TRIP_PASSIVE, 63 IMX_TRIP_CRITICAL, 64 IMX_TRIP_NUM, 65 }; 66 67 /* 68 * It defines the temperature in millicelsius for passive trip point 69 * that will trigger cooling action when crossed. 70 */ 71 #define IMX_TEMP_PASSIVE 85000 72 73 #define IMX_POLLING_DELAY 2000 /* millisecond */ 74 #define IMX_PASSIVE_DELAY 1000 75 76 #define FACTOR0 10000000 77 #define FACTOR1 15976 78 #define FACTOR2 4297157 79 80 #define TEMPMON_IMX6Q 1 81 #define TEMPMON_IMX6SX 2 82 83 struct thermal_soc_data { 84 u32 version; 85 }; 86 87 static struct thermal_soc_data thermal_imx6q_data = { 88 .version = TEMPMON_IMX6Q, 89 }; 90 91 static struct thermal_soc_data thermal_imx6sx_data = { 92 .version = TEMPMON_IMX6SX, 93 }; 94 95 struct imx_thermal_data { 96 struct thermal_zone_device *tz; 97 struct thermal_cooling_device *cdev; 98 enum thermal_device_mode mode; 99 struct regmap *tempmon; 100 u32 c1, c2; /* See formula in imx_get_sensor_data() */ 101 unsigned long temp_passive; 102 unsigned long temp_critical; 103 unsigned long alarm_temp; 104 unsigned long last_temp; 105 bool irq_enabled; 106 int irq; 107 struct clk *thermal_clk; 108 const struct thermal_soc_data *socdata; 109 }; 110 111 static void imx_set_panic_temp(struct imx_thermal_data *data, 112 signed long panic_temp) 113 { 114 struct regmap *map = data->tempmon; 115 int critical_value; 116 117 critical_value = (data->c2 - panic_temp) / data->c1; 118 regmap_write(map, TEMPSENSE2 + REG_CLR, TEMPSENSE2_PANIC_VALUE_MASK); 119 regmap_write(map, TEMPSENSE2 + REG_SET, critical_value << 120 TEMPSENSE2_PANIC_VALUE_SHIFT); 121 } 122 123 static void imx_set_alarm_temp(struct imx_thermal_data *data, 124 signed long alarm_temp) 125 { 126 struct regmap *map = data->tempmon; 127 int alarm_value; 128 129 data->alarm_temp = alarm_temp; 130 alarm_value = (data->c2 - alarm_temp) / data->c1; 131 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_ALARM_VALUE_MASK); 132 regmap_write(map, TEMPSENSE0 + REG_SET, alarm_value << 133 TEMPSENSE0_ALARM_VALUE_SHIFT); 134 } 135 136 static int imx_get_temp(struct thermal_zone_device *tz, unsigned long *temp) 137 { 138 struct imx_thermal_data *data = tz->devdata; 139 struct regmap *map = data->tempmon; 140 unsigned int n_meas; 141 bool wait; 142 u32 val; 143 144 if (data->mode == THERMAL_DEVICE_ENABLED) { 145 /* Check if a measurement is currently in progress */ 146 regmap_read(map, TEMPSENSE0, &val); 147 wait = !(val & TEMPSENSE0_FINISHED); 148 } else { 149 /* 150 * Every time we measure the temperature, we will power on the 151 * temperature sensor, enable measurements, take a reading, 152 * disable measurements, power off the temperature sensor. 153 */ 154 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 155 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 156 157 wait = true; 158 } 159 160 /* 161 * According to the temp sensor designers, it may require up to ~17us 162 * to complete a measurement. 163 */ 164 if (wait) 165 usleep_range(20, 50); 166 167 regmap_read(map, TEMPSENSE0, &val); 168 169 if (data->mode != THERMAL_DEVICE_ENABLED) { 170 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 171 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 172 } 173 174 if ((val & TEMPSENSE0_FINISHED) == 0) { 175 dev_dbg(&tz->device, "temp measurement never finished\n"); 176 return -EAGAIN; 177 } 178 179 n_meas = (val & TEMPSENSE0_TEMP_CNT_MASK) >> TEMPSENSE0_TEMP_CNT_SHIFT; 180 181 /* See imx_get_sensor_data() for formula derivation */ 182 *temp = data->c2 - n_meas * data->c1; 183 184 /* Update alarm value to next higher trip point for TEMPMON_IMX6Q */ 185 if (data->socdata->version == TEMPMON_IMX6Q) { 186 if (data->alarm_temp == data->temp_passive && 187 *temp >= data->temp_passive) 188 imx_set_alarm_temp(data, data->temp_critical); 189 if (data->alarm_temp == data->temp_critical && 190 *temp < data->temp_passive) { 191 imx_set_alarm_temp(data, data->temp_passive); 192 dev_dbg(&tz->device, "thermal alarm off: T < %lu\n", 193 data->alarm_temp / 1000); 194 } 195 } 196 197 if (*temp != data->last_temp) { 198 dev_dbg(&tz->device, "millicelsius: %ld\n", *temp); 199 data->last_temp = *temp; 200 } 201 202 /* Reenable alarm IRQ if temperature below alarm temperature */ 203 if (!data->irq_enabled && *temp < data->alarm_temp) { 204 data->irq_enabled = true; 205 enable_irq(data->irq); 206 } 207 208 return 0; 209 } 210 211 static int imx_get_mode(struct thermal_zone_device *tz, 212 enum thermal_device_mode *mode) 213 { 214 struct imx_thermal_data *data = tz->devdata; 215 216 *mode = data->mode; 217 218 return 0; 219 } 220 221 static int imx_set_mode(struct thermal_zone_device *tz, 222 enum thermal_device_mode mode) 223 { 224 struct imx_thermal_data *data = tz->devdata; 225 struct regmap *map = data->tempmon; 226 227 if (mode == THERMAL_DEVICE_ENABLED) { 228 tz->polling_delay = IMX_POLLING_DELAY; 229 tz->passive_delay = IMX_PASSIVE_DELAY; 230 231 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 232 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 233 234 if (!data->irq_enabled) { 235 data->irq_enabled = true; 236 enable_irq(data->irq); 237 } 238 } else { 239 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 240 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 241 242 tz->polling_delay = 0; 243 tz->passive_delay = 0; 244 245 if (data->irq_enabled) { 246 disable_irq(data->irq); 247 data->irq_enabled = false; 248 } 249 } 250 251 data->mode = mode; 252 thermal_zone_device_update(tz); 253 254 return 0; 255 } 256 257 static int imx_get_trip_type(struct thermal_zone_device *tz, int trip, 258 enum thermal_trip_type *type) 259 { 260 *type = (trip == IMX_TRIP_PASSIVE) ? THERMAL_TRIP_PASSIVE : 261 THERMAL_TRIP_CRITICAL; 262 return 0; 263 } 264 265 static int imx_get_crit_temp(struct thermal_zone_device *tz, 266 unsigned long *temp) 267 { 268 struct imx_thermal_data *data = tz->devdata; 269 270 *temp = data->temp_critical; 271 return 0; 272 } 273 274 static int imx_get_trip_temp(struct thermal_zone_device *tz, int trip, 275 unsigned long *temp) 276 { 277 struct imx_thermal_data *data = tz->devdata; 278 279 *temp = (trip == IMX_TRIP_PASSIVE) ? data->temp_passive : 280 data->temp_critical; 281 return 0; 282 } 283 284 static int imx_set_trip_temp(struct thermal_zone_device *tz, int trip, 285 unsigned long temp) 286 { 287 struct imx_thermal_data *data = tz->devdata; 288 289 if (trip == IMX_TRIP_CRITICAL) 290 return -EPERM; 291 292 if (temp > IMX_TEMP_PASSIVE) 293 return -EINVAL; 294 295 data->temp_passive = temp; 296 297 imx_set_alarm_temp(data, temp); 298 299 return 0; 300 } 301 302 static int imx_bind(struct thermal_zone_device *tz, 303 struct thermal_cooling_device *cdev) 304 { 305 int ret; 306 307 ret = thermal_zone_bind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev, 308 THERMAL_NO_LIMIT, 309 THERMAL_NO_LIMIT); 310 if (ret) { 311 dev_err(&tz->device, 312 "binding zone %s with cdev %s failed:%d\n", 313 tz->type, cdev->type, ret); 314 return ret; 315 } 316 317 return 0; 318 } 319 320 static int imx_unbind(struct thermal_zone_device *tz, 321 struct thermal_cooling_device *cdev) 322 { 323 int ret; 324 325 ret = thermal_zone_unbind_cooling_device(tz, IMX_TRIP_PASSIVE, cdev); 326 if (ret) { 327 dev_err(&tz->device, 328 "unbinding zone %s with cdev %s failed:%d\n", 329 tz->type, cdev->type, ret); 330 return ret; 331 } 332 333 return 0; 334 } 335 336 static struct thermal_zone_device_ops imx_tz_ops = { 337 .bind = imx_bind, 338 .unbind = imx_unbind, 339 .get_temp = imx_get_temp, 340 .get_mode = imx_get_mode, 341 .set_mode = imx_set_mode, 342 .get_trip_type = imx_get_trip_type, 343 .get_trip_temp = imx_get_trip_temp, 344 .get_crit_temp = imx_get_crit_temp, 345 .set_trip_temp = imx_set_trip_temp, 346 }; 347 348 static int imx_get_sensor_data(struct platform_device *pdev) 349 { 350 struct imx_thermal_data *data = platform_get_drvdata(pdev); 351 struct regmap *map; 352 int t1, n1; 353 int ret; 354 u32 val; 355 u64 temp64; 356 357 map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, 358 "fsl,tempmon-data"); 359 if (IS_ERR(map)) { 360 ret = PTR_ERR(map); 361 dev_err(&pdev->dev, "failed to get sensor regmap: %d\n", ret); 362 return ret; 363 } 364 365 ret = regmap_read(map, OCOTP_ANA1, &val); 366 if (ret) { 367 dev_err(&pdev->dev, "failed to read sensor data: %d\n", ret); 368 return ret; 369 } 370 371 if (val == 0 || val == ~0) { 372 dev_err(&pdev->dev, "invalid sensor calibration data\n"); 373 return -EINVAL; 374 } 375 376 /* 377 * Sensor data layout: 378 * [31:20] - sensor value @ 25C 379 * Use universal formula now and only need sensor value @ 25C 380 * slope = 0.4297157 - (0.0015976 * 25C fuse) 381 */ 382 n1 = val >> 20; 383 t1 = 25; /* t1 always 25C */ 384 385 /* 386 * Derived from linear interpolation: 387 * slope = 0.4297157 - (0.0015976 * 25C fuse) 388 * slope = (FACTOR2 - FACTOR1 * n1) / FACTOR0 389 * (Nmeas - n1) / (Tmeas - t1) = slope 390 * We want to reduce this down to the minimum computation necessary 391 * for each temperature read. Also, we want Tmeas in millicelsius 392 * and we don't want to lose precision from integer division. So... 393 * Tmeas = (Nmeas - n1) / slope + t1 394 * milli_Tmeas = 1000 * (Nmeas - n1) / slope + 1000 * t1 395 * milli_Tmeas = -1000 * (n1 - Nmeas) / slope + 1000 * t1 396 * Let constant c1 = (-1000 / slope) 397 * milli_Tmeas = (n1 - Nmeas) * c1 + 1000 * t1 398 * Let constant c2 = n1 *c1 + 1000 * t1 399 * milli_Tmeas = c2 - Nmeas * c1 400 */ 401 temp64 = FACTOR0; 402 temp64 *= 1000; 403 do_div(temp64, FACTOR1 * n1 - FACTOR2); 404 data->c1 = temp64; 405 data->c2 = n1 * data->c1 + 1000 * t1; 406 407 /* 408 * Set the default passive cooling trip point, 409 * can be changed from userspace. 410 */ 411 data->temp_passive = IMX_TEMP_PASSIVE; 412 413 /* 414 * The maximum die temperature set to 20 C higher than 415 * IMX_TEMP_PASSIVE. 416 */ 417 data->temp_critical = 1000 * 20 + data->temp_passive; 418 419 return 0; 420 } 421 422 static irqreturn_t imx_thermal_alarm_irq(int irq, void *dev) 423 { 424 struct imx_thermal_data *data = dev; 425 426 disable_irq_nosync(irq); 427 data->irq_enabled = false; 428 429 return IRQ_WAKE_THREAD; 430 } 431 432 static irqreturn_t imx_thermal_alarm_irq_thread(int irq, void *dev) 433 { 434 struct imx_thermal_data *data = dev; 435 436 dev_dbg(&data->tz->device, "THERMAL ALARM: T > %lu\n", 437 data->alarm_temp / 1000); 438 439 thermal_zone_device_update(data->tz); 440 441 return IRQ_HANDLED; 442 } 443 444 static const struct of_device_id of_imx_thermal_match[] = { 445 { .compatible = "fsl,imx6q-tempmon", .data = &thermal_imx6q_data, }, 446 { .compatible = "fsl,imx6sx-tempmon", .data = &thermal_imx6sx_data, }, 447 { /* end */ } 448 }; 449 MODULE_DEVICE_TABLE(of, of_imx_thermal_match); 450 451 static int imx_thermal_probe(struct platform_device *pdev) 452 { 453 const struct of_device_id *of_id = 454 of_match_device(of_imx_thermal_match, &pdev->dev); 455 struct imx_thermal_data *data; 456 struct regmap *map; 457 int measure_freq; 458 int ret; 459 460 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); 461 if (!data) 462 return -ENOMEM; 463 464 map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "fsl,tempmon"); 465 if (IS_ERR(map)) { 466 ret = PTR_ERR(map); 467 dev_err(&pdev->dev, "failed to get tempmon regmap: %d\n", ret); 468 return ret; 469 } 470 data->tempmon = map; 471 472 data->socdata = of_id->data; 473 474 /* make sure the IRQ flag is clear before enabling irq on i.MX6SX */ 475 if (data->socdata->version == TEMPMON_IMX6SX) { 476 regmap_write(map, MISC1 + REG_CLR, MISC1_IRQ_TEMPHIGH | 477 MISC1_IRQ_TEMPLOW | MISC1_IRQ_TEMPPANIC); 478 /* 479 * reset value of LOW ALARM is incorrect, set it to lowest 480 * value to avoid false trigger of low alarm. 481 */ 482 regmap_write(map, TEMPSENSE2 + REG_SET, 483 TEMPSENSE2_LOW_VALUE_MASK); 484 } 485 486 data->irq = platform_get_irq(pdev, 0); 487 if (data->irq < 0) 488 return data->irq; 489 490 ret = devm_request_threaded_irq(&pdev->dev, data->irq, 491 imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread, 492 0, "imx_thermal", data); 493 if (ret < 0) { 494 dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); 495 return ret; 496 } 497 498 platform_set_drvdata(pdev, data); 499 500 ret = imx_get_sensor_data(pdev); 501 if (ret) { 502 dev_err(&pdev->dev, "failed to get sensor data\n"); 503 return ret; 504 } 505 506 /* Make sure sensor is in known good state for measurements */ 507 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 508 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 509 regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ); 510 regmap_write(map, MISC0 + REG_SET, MISC0_REFTOP_SELBIASOFF); 511 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 512 513 data->cdev = cpufreq_cooling_register(cpu_present_mask); 514 if (IS_ERR(data->cdev)) { 515 ret = PTR_ERR(data->cdev); 516 if (ret != -EPROBE_DEFER) 517 dev_err(&pdev->dev, 518 "failed to register cpufreq cooling device: %d\n", 519 ret); 520 return ret; 521 } 522 523 data->thermal_clk = devm_clk_get(&pdev->dev, NULL); 524 if (IS_ERR(data->thermal_clk)) { 525 ret = PTR_ERR(data->thermal_clk); 526 if (ret != -EPROBE_DEFER) 527 dev_err(&pdev->dev, 528 "failed to get thermal clk: %d\n", ret); 529 cpufreq_cooling_unregister(data->cdev); 530 return ret; 531 } 532 533 /* 534 * Thermal sensor needs clk on to get correct value, normally 535 * we should enable its clk before taking measurement and disable 536 * clk after measurement is done, but if alarm function is enabled, 537 * hardware will auto measure the temperature periodically, so we 538 * need to keep the clk always on for alarm function. 539 */ 540 ret = clk_prepare_enable(data->thermal_clk); 541 if (ret) { 542 dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret); 543 cpufreq_cooling_unregister(data->cdev); 544 return ret; 545 } 546 547 data->tz = thermal_zone_device_register("imx_thermal_zone", 548 IMX_TRIP_NUM, 549 BIT(IMX_TRIP_PASSIVE), data, 550 &imx_tz_ops, NULL, 551 IMX_PASSIVE_DELAY, 552 IMX_POLLING_DELAY); 553 if (IS_ERR(data->tz)) { 554 ret = PTR_ERR(data->tz); 555 dev_err(&pdev->dev, 556 "failed to register thermal zone device %d\n", ret); 557 clk_disable_unprepare(data->thermal_clk); 558 cpufreq_cooling_unregister(data->cdev); 559 return ret; 560 } 561 562 /* Enable measurements at ~ 10 Hz */ 563 regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ); 564 measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */ 565 regmap_write(map, TEMPSENSE1 + REG_SET, measure_freq); 566 imx_set_alarm_temp(data, data->temp_passive); 567 568 if (data->socdata->version == TEMPMON_IMX6SX) 569 imx_set_panic_temp(data, data->temp_critical); 570 571 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 572 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 573 574 data->irq_enabled = true; 575 data->mode = THERMAL_DEVICE_ENABLED; 576 577 return 0; 578 } 579 580 static int imx_thermal_remove(struct platform_device *pdev) 581 { 582 struct imx_thermal_data *data = platform_get_drvdata(pdev); 583 struct regmap *map = data->tempmon; 584 585 /* Disable measurements */ 586 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 587 if (!IS_ERR(data->thermal_clk)) 588 clk_disable_unprepare(data->thermal_clk); 589 590 thermal_zone_device_unregister(data->tz); 591 cpufreq_cooling_unregister(data->cdev); 592 593 return 0; 594 } 595 596 #ifdef CONFIG_PM_SLEEP 597 static int imx_thermal_suspend(struct device *dev) 598 { 599 struct imx_thermal_data *data = dev_get_drvdata(dev); 600 struct regmap *map = data->tempmon; 601 602 /* 603 * Need to disable thermal sensor, otherwise, when thermal core 604 * try to get temperature before thermal sensor resume, a wrong 605 * temperature will be read as the thermal sensor is powered 606 * down. 607 */ 608 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); 609 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); 610 data->mode = THERMAL_DEVICE_DISABLED; 611 clk_disable_unprepare(data->thermal_clk); 612 613 return 0; 614 } 615 616 static int imx_thermal_resume(struct device *dev) 617 { 618 struct imx_thermal_data *data = dev_get_drvdata(dev); 619 struct regmap *map = data->tempmon; 620 621 clk_prepare_enable(data->thermal_clk); 622 /* Enabled thermal sensor after resume */ 623 regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); 624 regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); 625 data->mode = THERMAL_DEVICE_ENABLED; 626 627 return 0; 628 } 629 #endif 630 631 static SIMPLE_DEV_PM_OPS(imx_thermal_pm_ops, 632 imx_thermal_suspend, imx_thermal_resume); 633 634 static struct platform_driver imx_thermal = { 635 .driver = { 636 .name = "imx_thermal", 637 .pm = &imx_thermal_pm_ops, 638 .of_match_table = of_imx_thermal_match, 639 }, 640 .probe = imx_thermal_probe, 641 .remove = imx_thermal_remove, 642 }; 643 module_platform_driver(imx_thermal); 644 645 MODULE_AUTHOR("Freescale Semiconductor, Inc."); 646 MODULE_DESCRIPTION("Thermal driver for Freescale i.MX SoCs"); 647 MODULE_LICENSE("GPL v2"); 648 MODULE_ALIAS("platform:imx-thermal"); 649