drivers/thermal/hisi_thermal.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HiSilicon thermal sensor driver
   4  *
   5  * Copyright (c) 2014-2015 HiSilicon Limited.
   6  * Copyright (c) 2014-2015 Linaro Limited.
   7  *
   8  * Xinwei Kong <kong.kongxinwei@hisilicon.com>
   9  * Leo Yan <leo.yan@linaro.org>
  10  */
  11
  12 #include <linux/cpufreq.h>
  13 #include <linux/delay.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/module.h>
  16 #include <linux/of.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/io.h>
  19 #include <linux/thermal.h>
  20
  21 #define HI6220_TEMP0_LAG                        (0x0)
  22 #define HI6220_TEMP0_TH                         (0x4)
  23 #define HI6220_TEMP0_RST_TH                     (0x8)
  24 #define HI6220_TEMP0_CFG                        (0xC)
  25 #define HI6220_TEMP0_CFG_SS_MSK                 (0xF000)
  26 #define HI6220_TEMP0_CFG_HDAK_MSK               (0x30)
  27 #define HI6220_TEMP0_EN                         (0x10)
  28 #define HI6220_TEMP0_INT_EN                     (0x14)
  29 #define HI6220_TEMP0_INT_CLR                    (0x18)
  30 #define HI6220_TEMP0_RST_MSK                    (0x1C)
  31 #define HI6220_TEMP0_VALUE                      (0x28)
  32
  33 #define HI3660_OFFSET(chan)             ((chan) * 0x40)
  34 #define HI3660_TEMP(chan)               (HI3660_OFFSET(chan) + 0x1C)
  35 #define HI3660_TH(chan)                 (HI3660_OFFSET(chan) + 0x20)
  36 #define HI3660_LAG(chan)                (HI3660_OFFSET(chan) + 0x28)
  37 #define HI3660_INT_EN(chan)             (HI3660_OFFSET(chan) + 0x2C)
  38 #define HI3660_INT_CLR(chan)            (HI3660_OFFSET(chan) + 0x30)
  39
  40 #define HI6220_TEMP_BASE                        (-60000)
  41 #define HI6220_TEMP_RESET                       (100000)
  42 #define HI6220_TEMP_STEP                        (785)
  43 #define HI6220_TEMP_LAG                         (3500)
  44
  45 #define HI3660_TEMP_BASE                (-63780)
  46 #define HI3660_TEMP_STEP                (205)
  47 #define HI3660_TEMP_LAG                 (4000)
  48
  49 #define HI6220_CLUSTER0_SENSOR          2
  50 #define HI6220_CLUSTER1_SENSOR          1
  51
  52 #define HI3660_LITTLE_SENSOR            0
  53 #define HI3660_BIG_SENSOR               1
  54 #define HI3660_G3D_SENSOR               2
  55 #define HI3660_MODEM_SENSOR             3
  56
  57 struct hisi_thermal_data;
  58
  59 struct hisi_thermal_sensor {
  60         struct hisi_thermal_data *data;
  61         struct thermal_zone_device *tzd;
  62         const char *irq_name;
  63         uint32_t id;
  64         uint32_t thres_temp;
  65 };
  66
  67 struct hisi_thermal_ops {
  68         int (*get_temp)(struct hisi_thermal_sensor *sensor);
  69         int (*enable_sensor)(struct hisi_thermal_sensor *sensor);
  70         int (*disable_sensor)(struct hisi_thermal_sensor *sensor);
  71         int (*irq_handler)(struct hisi_thermal_sensor *sensor);
  72         int (*probe)(struct hisi_thermal_data *data);
  73 };
  74
  75 struct hisi_thermal_data {
  76         const struct hisi_thermal_ops *ops;
  77         struct hisi_thermal_sensor *sensor;
  78         struct platform_device *pdev;
  79         struct clk *clk;
  80         void __iomem *regs;
  81         int nr_sensors;
  82 };
  83
  84 /*
  85  * The temperature computation on the tsensor is as follow:
  86  *      Unit: millidegree Celsius
  87  *      Step: 200/255 (0.7843)
  88  *      Temperature base: -60°C
  89  *
  90  * The register is programmed in temperature steps, every step is 785
  91  * millidegree and begins at -60 000 m°C
  92  *
  93  * The temperature from the steps:
  94  *
  95  *      Temp = TempBase + (steps x 785)
  96  *
  97  * and the steps from the temperature:
  98  *
  99  *      steps = (Temp - TempBase) / 785
 100  *
 101  */
 102 static inline int hi6220_thermal_step_to_temp(int step)
 103 {
 104         return HI6220_TEMP_BASE + (step * HI6220_TEMP_STEP);
 105 }
 106
 107 static inline int hi6220_thermal_temp_to_step(int temp)
 108 {
 109         return DIV_ROUND_UP(temp - HI6220_TEMP_BASE, HI6220_TEMP_STEP);
 110 }
 111
 112 /*
 113  * for Hi3660,
 114  *      Step: 189/922 (0.205)
 115  *      Temperature base: -63.780°C
 116  *
 117  * The register is programmed in temperature steps, every step is 205
 118  * millidegree and begins at -63 780 m°C
 119  */
 120 static inline int hi3660_thermal_step_to_temp(int step)
 121 {
 122         return HI3660_TEMP_BASE + step * HI3660_TEMP_STEP;
 123 }
 124
 125 static inline int hi3660_thermal_temp_to_step(int temp)
 126 {
 127         return DIV_ROUND_UP(temp - HI3660_TEMP_BASE, HI3660_TEMP_STEP);
 128 }
 129
 130 /*
 131  * The lag register contains 5 bits encoding the temperature in steps.
 132  *
 133  * Each time the temperature crosses the threshold boundary, an
 134  * interrupt is raised. It could be when the temperature is going
 135  * above the threshold or below. However, if the temperature is
 136  * fluctuating around this value due to the load, we can receive
 137  * several interrupts which may not desired.
 138  *
 139  * We can setup a temperature representing the delta between the
 140  * threshold and the current temperature when the temperature is
 141  * decreasing.
 142  *
 143  * For instance: the lag register is 5°C, the threshold is 65°C, when
 144  * the temperature reaches 65°C an interrupt is raised and when the
 145  * temperature decrease to 65°C - 5°C another interrupt is raised.
 146  *
 147  * A very short lag can lead to an interrupt storm, a long lag
 148  * increase the latency to react to the temperature changes.  In our
 149  * case, that is not really a problem as we are polling the
 150  * temperature.
 151  *
 152  * [0:4] : lag register
 153  *
 154  * The temperature is coded in steps, cf. HI6220_TEMP_STEP.
 155  *
 156  * Min : 0x00 :  0.0 °C
 157  * Max : 0x1F : 24.3 °C
 158  *
 159  * The 'value' parameter is in milliCelsius.
 160  */
 161 static inline void hi6220_thermal_set_lag(void __iomem *addr, int value)
 162 {
 163         writel(DIV_ROUND_UP(value, HI6220_TEMP_STEP) & 0x1F,
 164                         addr + HI6220_TEMP0_LAG);
 165 }
 166
 167 static inline void hi6220_thermal_alarm_clear(void __iomem *addr, int value)
 168 {
 169         writel(value, addr + HI6220_TEMP0_INT_CLR);
 170 }
 171
 172 static inline void hi6220_thermal_alarm_enable(void __iomem *addr, int value)
 173 {
 174         writel(value, addr + HI6220_TEMP0_INT_EN);
 175 }
 176
 177 static inline void hi6220_thermal_alarm_set(void __iomem *addr, int temp)
 178 {
 179         writel(hi6220_thermal_temp_to_step(temp) | 0x0FFFFFF00,
 180                addr + HI6220_TEMP0_TH);
 181 }
 182
 183 static inline void hi6220_thermal_reset_set(void __iomem *addr, int temp)
 184 {
 185         writel(hi6220_thermal_temp_to_step(temp), addr + HI6220_TEMP0_RST_TH);
 186 }
 187
 188 static inline void hi6220_thermal_reset_enable(void __iomem *addr, int value)
 189 {
 190         writel(value, addr + HI6220_TEMP0_RST_MSK);
 191 }
 192
 193 static inline void hi6220_thermal_enable(void __iomem *addr, int value)
 194 {
 195         writel(value, addr + HI6220_TEMP0_EN);
 196 }
 197
 198 static inline int hi6220_thermal_get_temperature(void __iomem *addr)
 199 {
 200         return hi6220_thermal_step_to_temp(readl(addr + HI6220_TEMP0_VALUE));
 201 }
 202
 203 /*
 204  * [0:6] lag register
 205  *
 206  * The temperature is coded in steps, cf. HI3660_TEMP_STEP.
 207  *
 208  * Min : 0x00 :  0.0 °C
 209  * Max : 0x7F : 26.0 °C
 210  *
 211  */
 212 static inline void hi3660_thermal_set_lag(void __iomem *addr,
 213                                           int id, int value)
 214 {
 215         writel(DIV_ROUND_UP(value, HI3660_TEMP_STEP) & 0x7F,
 216                         addr + HI3660_LAG(id));
 217 }
 218
 219 static inline void hi3660_thermal_alarm_clear(void __iomem *addr,
 220                                               int id, int value)
 221 {
 222         writel(value, addr + HI3660_INT_CLR(id));
 223 }
 224
 225 static inline void hi3660_thermal_alarm_enable(void __iomem *addr,
 226                                                int id, int value)
 227 {
 228         writel(value, addr + HI3660_INT_EN(id));
 229 }
 230
 231 static inline void hi3660_thermal_alarm_set(void __iomem *addr,
 232                                             int id, int value)
 233 {
 234         writel(value, addr + HI3660_TH(id));
 235 }
 236
 237 static inline int hi3660_thermal_get_temperature(void __iomem *addr, int id)
 238 {
 239         return hi3660_thermal_step_to_temp(readl(addr + HI3660_TEMP(id)));
 240 }
 241
 242 /*
 243  * Temperature configuration register - Sensor selection
 244  *
 245  * Bits [19:12]
 246  *
 247  * 0x0: local sensor (default)
 248  * 0x1: remote sensor 1 (ACPU cluster 1)
 249  * 0x2: remote sensor 2 (ACPU cluster 0)
 250  * 0x3: remote sensor 3 (G3D)
 251  */
 252 static inline void hi6220_thermal_sensor_select(void __iomem *addr, int sensor)
 253 {
 254         writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_SS_MSK) |
 255                (sensor << 12), addr + HI6220_TEMP0_CFG);
 256 }
 257
 258 /*
 259  * Temperature configuration register - Hdak conversion polling interval
 260  *
 261  * Bits [5:4]
 262  *
 263  * 0x0 :   0.768 ms
 264  * 0x1 :   6.144 ms
 265  * 0x2 :  49.152 ms
 266  * 0x3 : 393.216 ms
 267  */
 268 static inline void hi6220_thermal_hdak_set(void __iomem *addr, int value)
 269 {
 270         writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_HDAK_MSK) |
 271                (value << 4), addr + HI6220_TEMP0_CFG);
 272 }
 273
 274 static int hi6220_thermal_irq_handler(struct hisi_thermal_sensor *sensor)
 275 {
 276         struct hisi_thermal_data *data = sensor->data;
 277
 278         hi6220_thermal_alarm_clear(data->regs, 1);
 279         return 0;
 280 }
 281
 282 static int hi3660_thermal_irq_handler(struct hisi_thermal_sensor *sensor)
 283 {
 284         struct hisi_thermal_data *data = sensor->data;
 285
 286         hi3660_thermal_alarm_clear(data->regs, sensor->id, 1);
 287         return 0;
 288 }
 289
 290 static int hi6220_thermal_get_temp(struct hisi_thermal_sensor *sensor)
 291 {
 292         struct hisi_thermal_data *data = sensor->data;
 293
 294         return hi6220_thermal_get_temperature(data->regs);
 295 }
 296
 297 static int hi3660_thermal_get_temp(struct hisi_thermal_sensor *sensor)
 298 {
 299         struct hisi_thermal_data *data = sensor->data;
 300
 301         return hi3660_thermal_get_temperature(data->regs, sensor->id);
 302 }
 303
 304 static int hi6220_thermal_disable_sensor(struct hisi_thermal_sensor *sensor)
 305 {
 306         struct hisi_thermal_data *data = sensor->data;
 307
 308         /* disable sensor module */
 309         hi6220_thermal_enable(data->regs, 0);
 310         hi6220_thermal_alarm_enable(data->regs, 0);
 311         hi6220_thermal_reset_enable(data->regs, 0);
 312
 313         clk_disable_unprepare(data->clk);
 314
 315         return 0;
 316 }
 317
 318 static int hi3660_thermal_disable_sensor(struct hisi_thermal_sensor *sensor)
 319 {
 320         struct hisi_thermal_data *data = sensor->data;
 321
 322         /* disable sensor module */
 323         hi3660_thermal_alarm_enable(data->regs, sensor->id, 0);
 324         return 0;
 325 }
 326
 327 static int hi6220_thermal_enable_sensor(struct hisi_thermal_sensor *sensor)
 328 {
 329         struct hisi_thermal_data *data = sensor->data;
 330         int ret;
 331
 332         /* enable clock for tsensor */
 333         ret = clk_prepare_enable(data->clk);
 334         if (ret)
 335                 return ret;
 336
 337         /* disable module firstly */
 338         hi6220_thermal_reset_enable(data->regs, 0);
 339         hi6220_thermal_enable(data->regs, 0);
 340
 341         /* select sensor id */
 342         hi6220_thermal_sensor_select(data->regs, sensor->id);
 343
 344         /* setting the hdak time */
 345         hi6220_thermal_hdak_set(data->regs, 0);
 346
 347         /* setting lag value between current temp and the threshold */
 348         hi6220_thermal_set_lag(data->regs, HI6220_TEMP_LAG);
 349
 350         /* enable for interrupt */
 351         hi6220_thermal_alarm_set(data->regs, sensor->thres_temp);
 352
 353         hi6220_thermal_reset_set(data->regs, HI6220_TEMP_RESET);
 354
 355         /* enable module */
 356         hi6220_thermal_reset_enable(data->regs, 1);
 357         hi6220_thermal_enable(data->regs, 1);
 358
 359         hi6220_thermal_alarm_clear(data->regs, 0);
 360         hi6220_thermal_alarm_enable(data->regs, 1);
 361
 362         return 0;
 363 }
 364
 365 static int hi3660_thermal_enable_sensor(struct hisi_thermal_sensor *sensor)
 366 {
 367         unsigned int value;
 368         struct hisi_thermal_data *data = sensor->data;
 369
 370         /* disable interrupt */
 371         hi3660_thermal_alarm_enable(data->regs, sensor->id, 0);
 372
 373         /* setting lag value between current temp and the threshold */
 374         hi3660_thermal_set_lag(data->regs, sensor->id, HI3660_TEMP_LAG);
 375
 376         /* set interrupt threshold */
 377         value = hi3660_thermal_temp_to_step(sensor->thres_temp);
 378         hi3660_thermal_alarm_set(data->regs, sensor->id, value);
 379
 380         /* enable interrupt */
 381         hi3660_thermal_alarm_clear(data->regs, sensor->id, 1);
 382         hi3660_thermal_alarm_enable(data->regs, sensor->id, 1);
 383
 384         return 0;
 385 }
 386
 387 static int hi6220_thermal_probe(struct hisi_thermal_data *data)
 388 {
 389         struct platform_device *pdev = data->pdev;
 390         struct device *dev = &pdev->dev;
 391         int ret;
 392
 393         data->clk = devm_clk_get(dev, "thermal_clk");
 394         if (IS_ERR(data->clk)) {
 395                 ret = PTR_ERR(data->clk);
 396                 if (ret != -EPROBE_DEFER)
 397                         dev_err(dev, "failed to get thermal clk: %d\n", ret);
 398                 return ret;
 399         }
 400
 401         data->sensor = devm_kzalloc(dev, sizeof(*data->sensor), GFP_KERNEL);
 402         if (!data->sensor)
 403                 return -ENOMEM;
 404
 405         data->sensor[0].id = HI6220_CLUSTER0_SENSOR;
 406         data->sensor[0].irq_name = "tsensor_intr";
 407         data->sensor[0].data = data;
 408         data->nr_sensors = 1;
 409
 410         return 0;
 411 }
 412
 413 static int hi3660_thermal_probe(struct hisi_thermal_data *data)
 414 {
 415         struct platform_device *pdev = data->pdev;
 416         struct device *dev = &pdev->dev;
 417
 418         data->nr_sensors = 1;
 419
 420         data->sensor = devm_kzalloc(dev, sizeof(*data->sensor) *
 421                                     data->nr_sensors, GFP_KERNEL);
 422         if (!data->sensor)
 423                 return -ENOMEM;
 424
 425         data->sensor[0].id = HI3660_BIG_SENSOR;
 426         data->sensor[0].irq_name = "tsensor_a73";
 427         data->sensor[0].data = data;
 428
 429         return 0;
 430 }
 431
 432 static int hisi_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
 433 {
 434         struct hisi_thermal_sensor *sensor = thermal_zone_device_priv(tz);
 435         struct hisi_thermal_data *data = sensor->data;
 436
 437         *temp = data->ops->get_temp(sensor);
 438
 439         return 0;
 440 }
 441
 442 static const struct thermal_zone_device_ops hisi_of_thermal_ops = {
 443         .get_temp = hisi_thermal_get_temp,
 444 };
 445
 446 static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
 447 {
 448         struct hisi_thermal_sensor *sensor = dev;
 449         struct hisi_thermal_data *data = sensor->data;
 450         int temp = 0;
 451
 452         data->ops->irq_handler(sensor);
 453
 454         temp = data->ops->get_temp(sensor);
 455
 456         if (temp >= sensor->thres_temp) {
 457                 dev_crit(&data->pdev->dev,
 458                          "sensor <%d> THERMAL ALARM: %d > %d\n",
 459                          sensor->id, temp, sensor->thres_temp);
 460
 461                 thermal_zone_device_update(sensor->tzd,
 462                                            THERMAL_EVENT_UNSPECIFIED);
 463
 464         } else {
 465                 dev_crit(&data->pdev->dev,
 466                          "sensor <%d> THERMAL ALARM stopped: %d < %d\n",
 467                          sensor->id, temp, sensor->thres_temp);
 468         }
 469
 470         return IRQ_HANDLED;
 471 }
 472
 473 static int hisi_thermal_register_sensor(struct platform_device *pdev,
 474                                         struct hisi_thermal_sensor *sensor)
 475 {
 476         int ret, i;
 477         struct thermal_trip trip;
 478
 479         sensor->tzd = devm_thermal_of_zone_register(&pdev->dev,
 480                                                     sensor->id, sensor,
 481                                                     &hisi_of_thermal_ops);
 482         if (IS_ERR(sensor->tzd)) {
 483                 ret = PTR_ERR(sensor->tzd);
 484                 sensor->tzd = NULL;
 485                 dev_err(&pdev->dev, "failed to register sensor id %d: %d\n",
 486                         sensor->id, ret);
 487                 return ret;
 488         }
 489
 490         for (i = 0; i < thermal_zone_get_num_trips(sensor->tzd); i++) {
 491
 492                 thermal_zone_get_trip(sensor->tzd, i, &trip);
 493
 494                 if (trip.type == THERMAL_TRIP_PASSIVE) {
 495                         sensor->thres_temp = trip.temperature;
 496                         break;
 497                 }
 498         }
 499
 500         return 0;
 501 }
 502
 503 static const struct hisi_thermal_ops hi6220_ops = {
 504         .get_temp       = hi6220_thermal_get_temp,
 505         .enable_sensor  = hi6220_thermal_enable_sensor,
 506         .disable_sensor = hi6220_thermal_disable_sensor,
 507         .irq_handler    = hi6220_thermal_irq_handler,
 508         .probe          = hi6220_thermal_probe,
 509 };
 510
 511 static const struct hisi_thermal_ops hi3660_ops = {
 512         .get_temp       = hi3660_thermal_get_temp,
 513         .enable_sensor  = hi3660_thermal_enable_sensor,
 514         .disable_sensor = hi3660_thermal_disable_sensor,
 515         .irq_handler    = hi3660_thermal_irq_handler,
 516         .probe          = hi3660_thermal_probe,
 517 };
 518
 519 static const struct of_device_id of_hisi_thermal_match[] = {
 520         {
 521                 .compatible = "hisilicon,tsensor",
 522                 .data = &hi6220_ops,
 523         },
 524         {
 525                 .compatible = "hisilicon,hi3660-tsensor",
 526                 .data = &hi3660_ops,
 527         },
 528         { /* end */ }
 529 };
 530 MODULE_DEVICE_TABLE(of, of_hisi_thermal_match);
 531
 532 static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor,
 533                                        bool on)
 534 {
 535         struct thermal_zone_device *tzd = sensor->tzd;
 536
 537         if (on)
 538                 thermal_zone_device_enable(tzd);
 539         else
 540                 thermal_zone_device_disable(tzd);
 541 }
 542
 543 static int hisi_thermal_probe(struct platform_device *pdev)
 544 {
 545         struct hisi_thermal_data *data;
 546         struct device *dev = &pdev->dev;
 547         int i, ret;
 548
 549         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 550         if (!data)
 551                 return -ENOMEM;
 552
 553         data->pdev = pdev;
 554         platform_set_drvdata(pdev, data);
 555         data->ops = of_device_get_match_data(dev);
 556
 557         data->regs = devm_platform_ioremap_resource(pdev, 0);
 558         if (IS_ERR(data->regs))
 559                 return PTR_ERR(data->regs);
 560
 561         ret = data->ops->probe(data);
 562         if (ret)
 563                 return ret;
 564
 565         for (i = 0; i < data->nr_sensors; i++) {
 566                 struct hisi_thermal_sensor *sensor = &data->sensor[i];
 567
 568                 ret = hisi_thermal_register_sensor(pdev, sensor);
 569                 if (ret) {
 570                         dev_err(dev, "failed to register thermal sensor: %d\n",
 571                                 ret);
 572                         return ret;
 573                 }
 574
 575                 ret = platform_get_irq(pdev, 0);
 576                 if (ret < 0)
 577                         return ret;
 578
 579                 ret = devm_request_threaded_irq(dev, ret, NULL,
 580                                                 hisi_thermal_alarm_irq_thread,
 581                                                 IRQF_ONESHOT, sensor->irq_name,
 582                                                 sensor);
 583                 if (ret < 0) {
 584                         dev_err(dev, "Failed to request alarm irq: %d\n", ret);
 585                         return ret;
 586                 }
 587
 588                 ret = data->ops->enable_sensor(sensor);
 589                 if (ret) {
 590                         dev_err(dev, "Failed to setup the sensor: %d\n", ret);
 591                         return ret;
 592                 }
 593
 594                 hisi_thermal_toggle_sensor(sensor, true);
 595         }
 596
 597         return 0;
 598 }
 599
 600 static int hisi_thermal_remove(struct platform_device *pdev)
 601 {
 602         struct hisi_thermal_data *data = platform_get_drvdata(pdev);
 603         int i;
 604
 605         for (i = 0; i < data->nr_sensors; i++) {
 606                 struct hisi_thermal_sensor *sensor = &data->sensor[i];
 607
 608                 hisi_thermal_toggle_sensor(sensor, false);
 609                 data->ops->disable_sensor(sensor);
 610         }
 611
 612         return 0;
 613 }
 614
 615 static int hisi_thermal_suspend(struct device *dev)
 616 {
 617         struct hisi_thermal_data *data = dev_get_drvdata(dev);
 618         int i;
 619
 620         for (i = 0; i < data->nr_sensors; i++)
 621                 data->ops->disable_sensor(&data->sensor[i]);
 622
 623         return 0;
 624 }
 625
 626 static int hisi_thermal_resume(struct device *dev)
 627 {
 628         struct hisi_thermal_data *data = dev_get_drvdata(dev);
 629         int i, ret = 0;
 630
 631         for (i = 0; i < data->nr_sensors; i++)
 632                 ret |= data->ops->enable_sensor(&data->sensor[i]);
 633
 634         return ret;
 635 }
 636
 637 static DEFINE_SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops,
 638                          hisi_thermal_suspend, hisi_thermal_resume);
 639
 640 static struct platform_driver hisi_thermal_driver = {
 641         .driver = {
 642                 .name           = "hisi_thermal",
 643                 .pm             = pm_sleep_ptr(&hisi_thermal_pm_ops),
 644                 .of_match_table = of_hisi_thermal_match,
 645         },
 646         .probe  = hisi_thermal_probe,
 647         .remove = hisi_thermal_remove,
 648 };
 649
 650 module_platform_driver(hisi_thermal_driver);
 651
 652 MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
 653 MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
 654 MODULE_DESCRIPTION("HiSilicon thermal driver");
 655 MODULE_LICENSE("GPL v2");