drivers/thermal/sun8i_thermal.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Thermal sensor driver for Allwinner SOC
   4  * Copyright (C) 2019 Yangtao Li
   5  *
   6  * Based on the work of Icenowy Zheng <icenowy@aosc.io>
   7  * Based on the work of Ondrej Jirman <megous@megous.com>
   8  * Based on the work of Josef Gajdusek <atx@atx.name>
   9  */
  10
  11 #include <linux/clk.h>
  12 #include <linux/device.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/module.h>
  15 #include <linux/nvmem-consumer.h>
  16 #include <linux/of_device.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/regmap.h>
  19 #include <linux/reset.h>
  20 #include <linux/slab.h>
  21 #include <linux/thermal.h>
  22
  23 #include "thermal_hwmon.h"
  24
  25 #define MAX_SENSOR_NUM  4
  26
  27 #define FT_TEMP_MASK                            GENMASK(11, 0)
  28 #define TEMP_CALIB_MASK                         GENMASK(11, 0)
  29 #define CALIBRATE_DEFAULT                       0x800
  30
  31 #define SUN8I_THS_CTRL0                         0x00
  32 #define SUN8I_THS_CTRL2                         0x40
  33 #define SUN8I_THS_IC                            0x44
  34 #define SUN8I_THS_IS                            0x48
  35 #define SUN8I_THS_MFC                           0x70
  36 #define SUN8I_THS_TEMP_CALIB                    0x74
  37 #define SUN8I_THS_TEMP_DATA                     0x80
  38
  39 #define SUN50I_THS_CTRL0                        0x00
  40 #define SUN50I_H6_THS_ENABLE                    0x04
  41 #define SUN50I_H6_THS_PC                        0x08
  42 #define SUN50I_H6_THS_DIC                       0x10
  43 #define SUN50I_H6_THS_DIS                       0x20
  44 #define SUN50I_H6_THS_MFC                       0x30
  45 #define SUN50I_H6_THS_TEMP_CALIB                0xa0
  46 #define SUN50I_H6_THS_TEMP_DATA                 0xc0
  47
  48 #define SUN8I_THS_CTRL0_T_ACQ0(x)               (GENMASK(15, 0) & (x))
  49 #define SUN8I_THS_CTRL2_T_ACQ1(x)               ((GENMASK(15, 0) & (x)) << 16)
  50 #define SUN8I_THS_DATA_IRQ_STS(x)               BIT(x + 8)
  51
  52 #define SUN50I_THS_CTRL0_T_ACQ(x)               ((GENMASK(15, 0) & (x)) << 16)
  53 #define SUN50I_THS_FILTER_EN                    BIT(2)
  54 #define SUN50I_THS_FILTER_TYPE(x)               (GENMASK(1, 0) & (x))
  55 #define SUN50I_H6_THS_PC_TEMP_PERIOD(x)         ((GENMASK(19, 0) & (x)) << 12)
  56 #define SUN50I_H6_THS_DATA_IRQ_STS(x)           BIT(x)
  57
  58 /* millidegree celsius */
  59
  60 struct tsensor {
  61         struct ths_device               *tmdev;
  62         struct thermal_zone_device      *tzd;
  63         int                             id;
  64 };
  65
  66 struct ths_thermal_chip {
  67         bool            has_mod_clk;
  68         bool            has_bus_clk_reset;
  69         int             sensor_num;
  70         int             offset;
  71         int             scale;
  72         int             ft_deviation;
  73         int             temp_data_base;
  74         int             (*calibrate)(struct ths_device *tmdev,
  75                                      u16 *caldata, int callen);
  76         int             (*init)(struct ths_device *tmdev);
  77         int             (*irq_ack)(struct ths_device *tmdev);
  78         int             (*calc_temp)(struct ths_device *tmdev,
  79                                      int id, int reg);
  80 };
  81
  82 struct ths_device {
  83         const struct ths_thermal_chip           *chip;
  84         struct device                           *dev;
  85         struct regmap                           *regmap;
  86         struct reset_control                    *reset;
  87         struct clk                              *bus_clk;
  88         struct clk                              *mod_clk;
  89         struct tsensor                          sensor[MAX_SENSOR_NUM];
  90 };
  91
  92 /* Temp Unit: millidegree Celsius */
  93 static int sun8i_ths_calc_temp(struct ths_device *tmdev,
  94                                int id, int reg)
  95 {
  96         return tmdev->chip->offset - (reg * tmdev->chip->scale / 10);
  97 }
  98
  99 static int sun50i_h5_calc_temp(struct ths_device *tmdev,
 100                                int id, int reg)
 101 {
 102         if (reg >= 0x500)
 103                 return -1191 * reg / 10 + 223000;
 104         else if (!id)
 105                 return -1452 * reg / 10 + 259000;
 106         else
 107                 return -1590 * reg / 10 + 276000;
 108 }
 109
 110 static int sun8i_ths_get_temp(void *data, int *temp)
 111 {
 112         struct tsensor *s = data;
 113         struct ths_device *tmdev = s->tmdev;
 114         int val = 0;
 115
 116         regmap_read(tmdev->regmap, tmdev->chip->temp_data_base +
 117                     0x4 * s->id, &val);
 118
 119         /* ths have no data yet */
 120         if (!val)
 121                 return -EAGAIN;
 122
 123         *temp = tmdev->chip->calc_temp(tmdev, s->id, val);
 124         /*
 125          * According to the original sdk, there are some platforms(rarely)
 126          * that add a fixed offset value after calculating the temperature
 127          * value. We can't simply put it on the formula for calculating the
 128          * temperature above, because the formula for calculating the
 129          * temperature above is also used when the sensor is calibrated. If
 130          * do this, the correct calibration formula is hard to know.
 131          */
 132         *temp += tmdev->chip->ft_deviation;
 133
 134         return 0;
 135 }
 136
 137 static const struct thermal_zone_of_device_ops ths_ops = {
 138         .get_temp = sun8i_ths_get_temp,
 139 };
 140
 141 static const struct regmap_config config = {
 142         .reg_bits = 32,
 143         .val_bits = 32,
 144         .reg_stride = 4,
 145         .fast_io = true,
 146         .max_register = 0xfc,
 147 };
 148
 149 static int sun8i_h3_irq_ack(struct ths_device *tmdev)
 150 {
 151         int i, state, ret = 0;
 152
 153         regmap_read(tmdev->regmap, SUN8I_THS_IS, &state);
 154
 155         for (i = 0; i < tmdev->chip->sensor_num; i++) {
 156                 if (state & SUN8I_THS_DATA_IRQ_STS(i)) {
 157                         regmap_write(tmdev->regmap, SUN8I_THS_IS,
 158                                      SUN8I_THS_DATA_IRQ_STS(i));
 159                         ret |= BIT(i);
 160                 }
 161         }
 162
 163         return ret;
 164 }
 165
 166 static int sun50i_h6_irq_ack(struct ths_device *tmdev)
 167 {
 168         int i, state, ret = 0;
 169
 170         regmap_read(tmdev->regmap, SUN50I_H6_THS_DIS, &state);
 171
 172         for (i = 0; i < tmdev->chip->sensor_num; i++) {
 173                 if (state & SUN50I_H6_THS_DATA_IRQ_STS(i)) {
 174                         regmap_write(tmdev->regmap, SUN50I_H6_THS_DIS,
 175                                      SUN50I_H6_THS_DATA_IRQ_STS(i));
 176                         ret |= BIT(i);
 177                 }
 178         }
 179
 180         return ret;
 181 }
 182
 183 static irqreturn_t sun8i_irq_thread(int irq, void *data)
 184 {
 185         struct ths_device *tmdev = data;
 186         int i, state;
 187
 188         state = tmdev->chip->irq_ack(tmdev);
 189
 190         for (i = 0; i < tmdev->chip->sensor_num; i++) {
 191                 if (state & BIT(i))
 192                         thermal_zone_device_update(tmdev->sensor[i].tzd,
 193                                                    THERMAL_EVENT_UNSPECIFIED);
 194         }
 195
 196         return IRQ_HANDLED;
 197 }
 198
 199 static int sun8i_h3_ths_calibrate(struct ths_device *tmdev,
 200                                   u16 *caldata, int callen)
 201 {
 202         int i;
 203
 204         if (!caldata[0] || callen < 2 * tmdev->chip->sensor_num)
 205                 return -EINVAL;
 206
 207         for (i = 0; i < tmdev->chip->sensor_num; i++) {
 208                 int offset = (i % 2) << 4;
 209
 210                 regmap_update_bits(tmdev->regmap,
 211                                    SUN8I_THS_TEMP_CALIB + (4 * (i >> 1)),
 212                                    0xfff << offset,
 213                                    caldata[i] << offset);
 214         }
 215
 216         return 0;
 217 }
 218
 219 static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
 220                                    u16 *caldata, int callen)
 221 {
 222         struct device *dev = tmdev->dev;
 223         int i, ft_temp;
 224
 225         if (!caldata[0] || callen < 2 + 2 * tmdev->chip->sensor_num)
 226                 return -EINVAL;
 227
 228         /*
 229          * efuse layout:
 230          *
 231          *      0   11  16       32
 232          *      +-------+-------+-------+
 233          *      |temp|  |sensor0|sensor1|
 234          *      +-------+-------+-------+
 235          *
 236          * The calibration data on the H6 is the ambient temperature and
 237          * sensor values that are filled during the factory test stage.
 238          *
 239          * The unit of stored FT temperature is 0.1 degreee celusis.
 240          *
 241          * We need to calculate a delta between measured and caluclated
 242          * register values and this will become a calibration offset.
 243          */
 244         ft_temp = (caldata[0] & FT_TEMP_MASK) * 100;
 245
 246         for (i = 0; i < tmdev->chip->sensor_num; i++) {
 247                 int sensor_reg = caldata[i + 1] & TEMP_CALIB_MASK;
 248                 int cdata, offset;
 249                 int sensor_temp = tmdev->chip->calc_temp(tmdev, i, sensor_reg);
 250
 251                 /*
 252                  * Calibration data is CALIBRATE_DEFAULT - (calculated
 253                  * temperature from sensor reading at factory temperature
 254                  * minus actual factory temperature) * 14.88 (scale from
 255                  * temperature to register values)
 256                  */
 257                 cdata = CALIBRATE_DEFAULT -
 258                         ((sensor_temp - ft_temp) * 10 / tmdev->chip->scale);
 259                 if (cdata & ~TEMP_CALIB_MASK) {
 260                         /*
 261                          * Calibration value more than 12-bit, but calibration
 262                          * register is 12-bit. In this case, ths hardware can
 263                          * still work without calibration, although the data
 264                          * won't be so accurate.
 265                          */
 266                         dev_warn(dev, "sensor%d is not calibrated.\n", i);
 267                         continue;
 268                 }
 269
 270                 offset = (i % 2) * 16;
 271                 regmap_update_bits(tmdev->regmap,
 272                                    SUN50I_H6_THS_TEMP_CALIB + (i / 2 * 4),
 273                                    0xfff << offset,
 274                                    cdata << offset);
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int sun8i_ths_calibrate(struct ths_device *tmdev)
 281 {
 282         struct nvmem_cell *calcell;
 283         struct device *dev = tmdev->dev;
 284         u16 *caldata;
 285         size_t callen;
 286         int ret = 0;
 287
 288         calcell = devm_nvmem_cell_get(dev, "calibration");
 289         if (IS_ERR(calcell)) {
 290                 if (PTR_ERR(calcell) == -EPROBE_DEFER)
 291                         return -EPROBE_DEFER;
 292                 /*
 293                  * Even if the external calibration data stored in sid is
 294                  * not accessible, the THS hardware can still work, although
 295                  * the data won't be so accurate.
 296                  *
 297                  * The default value of calibration register is 0x800 for
 298                  * every sensor, and the calibration value is usually 0x7xx
 299                  * or 0x8xx, so they won't be away from the default value
 300                  * for a lot.
 301                  *
 302                  * So here we do not return error if the calibartion data is
 303                  * not available, except the probe needs deferring.
 304                  */
 305                 goto out;
 306         }
 307
 308         caldata = nvmem_cell_read(calcell, &callen);
 309         if (IS_ERR(caldata)) {
 310                 ret = PTR_ERR(caldata);
 311                 goto out;
 312         }
 313
 314         tmdev->chip->calibrate(tmdev, caldata, callen);
 315
 316         kfree(caldata);
 317 out:
 318         return ret;
 319 }
 320
 321 static void sun8i_ths_reset_control_assert(void *data)
 322 {
 323         reset_control_assert(data);
 324 }
 325
 326 static int sun8i_ths_resource_init(struct ths_device *tmdev)
 327 {
 328         struct device *dev = tmdev->dev;
 329         struct platform_device *pdev = to_platform_device(dev);
 330         void __iomem *base;
 331         int ret;
 332
 333         base = devm_platform_ioremap_resource(pdev, 0);
 334         if (IS_ERR(base))
 335                 return PTR_ERR(base);
 336
 337         tmdev->regmap = devm_regmap_init_mmio(dev, base, &config);
 338         if (IS_ERR(tmdev->regmap))
 339                 return PTR_ERR(tmdev->regmap);
 340
 341         if (tmdev->chip->has_bus_clk_reset) {
 342                 tmdev->reset = devm_reset_control_get(dev, NULL);
 343                 if (IS_ERR(tmdev->reset))
 344                         return PTR_ERR(tmdev->reset);
 345
 346                 ret = reset_control_deassert(tmdev->reset);
 347                 if (ret)
 348                         return ret;
 349
 350                 ret = devm_add_action_or_reset(dev, sun8i_ths_reset_control_assert,
 351                                                tmdev->reset);
 352                 if (ret)
 353                         return ret;
 354
 355                 tmdev->bus_clk = devm_clk_get_enabled(&pdev->dev, "bus");
 356                 if (IS_ERR(tmdev->bus_clk))
 357                         return PTR_ERR(tmdev->bus_clk);
 358         }
 359
 360         if (tmdev->chip->has_mod_clk) {
 361                 tmdev->mod_clk = devm_clk_get_enabled(&pdev->dev, "mod");
 362                 if (IS_ERR(tmdev->mod_clk))
 363                         return PTR_ERR(tmdev->mod_clk);
 364         }
 365
 366         ret = clk_set_rate(tmdev->mod_clk, 24000000);
 367         if (ret)
 368                 return ret;
 369
 370         ret = sun8i_ths_calibrate(tmdev);
 371         if (ret)
 372                 return ret;
 373
 374         return 0;
 375 }
 376
 377 static int sun8i_h3_thermal_init(struct ths_device *tmdev)
 378 {
 379         int val;
 380
 381         /* average over 4 samples */
 382         regmap_write(tmdev->regmap, SUN8I_THS_MFC,
 383                      SUN50I_THS_FILTER_EN |
 384                      SUN50I_THS_FILTER_TYPE(1));
 385         /*
 386          * clkin = 24MHz
 387          * filter_samples = 4
 388          * period = 0.25s
 389          *
 390          * x = period * clkin / 4096 / filter_samples - 1
 391          *   = 365
 392          */
 393         val = GENMASK(7 + tmdev->chip->sensor_num, 8);
 394         regmap_write(tmdev->regmap, SUN8I_THS_IC,
 395                      SUN50I_H6_THS_PC_TEMP_PERIOD(365) | val);
 396         /*
 397          * T_acq = 20us
 398          * clkin = 24MHz
 399          *
 400          * x = T_acq * clkin - 1
 401          *   = 479
 402          */
 403         regmap_write(tmdev->regmap, SUN8I_THS_CTRL0,
 404                      SUN8I_THS_CTRL0_T_ACQ0(479));
 405         val = GENMASK(tmdev->chip->sensor_num - 1, 0);
 406         regmap_write(tmdev->regmap, SUN8I_THS_CTRL2,
 407                      SUN8I_THS_CTRL2_T_ACQ1(479) | val);
 408
 409         return 0;
 410 }
 411
 412 /*
 413  * Without this undocummented value, the returned temperatures would
 414  * be higher than real ones by about 20C.
 415  */
 416 #define SUN50I_H6_CTRL0_UNK 0x0000002f
 417
 418 static int sun50i_h6_thermal_init(struct ths_device *tmdev)
 419 {
 420         int val;
 421
 422         /*
 423          * T_acq = 20us
 424          * clkin = 24MHz
 425          *
 426          * x = T_acq * clkin - 1
 427          *   = 479
 428          */
 429         regmap_write(tmdev->regmap, SUN50I_THS_CTRL0,
 430                      SUN50I_H6_CTRL0_UNK | SUN50I_THS_CTRL0_T_ACQ(479));
 431         /* average over 4 samples */
 432         regmap_write(tmdev->regmap, SUN50I_H6_THS_MFC,
 433                      SUN50I_THS_FILTER_EN |
 434                      SUN50I_THS_FILTER_TYPE(1));
 435         /*
 436          * clkin = 24MHz
 437          * filter_samples = 4
 438          * period = 0.25s
 439          *
 440          * x = period * clkin / 4096 / filter_samples - 1
 441          *   = 365
 442          */
 443         regmap_write(tmdev->regmap, SUN50I_H6_THS_PC,
 444                      SUN50I_H6_THS_PC_TEMP_PERIOD(365));
 445         /* enable sensor */
 446         val = GENMASK(tmdev->chip->sensor_num - 1, 0);
 447         regmap_write(tmdev->regmap, SUN50I_H6_THS_ENABLE, val);
 448         /* thermal data interrupt enable */
 449         val = GENMASK(tmdev->chip->sensor_num - 1, 0);
 450         regmap_write(tmdev->regmap, SUN50I_H6_THS_DIC, val);
 451
 452         return 0;
 453 }
 454
 455 static int sun8i_ths_register(struct ths_device *tmdev)
 456 {
 457         int i;
 458
 459         for (i = 0; i < tmdev->chip->sensor_num; i++) {
 460                 tmdev->sensor[i].tmdev = tmdev;
 461                 tmdev->sensor[i].id = i;
 462                 tmdev->sensor[i].tzd =
 463                         devm_thermal_zone_of_sensor_register(tmdev->dev,
 464                                                              i,
 465                                                              &tmdev->sensor[i],
 466                                                              &ths_ops);
 467                 if (IS_ERR(tmdev->sensor[i].tzd))
 468                         return PTR_ERR(tmdev->sensor[i].tzd);
 469
 470                 if (devm_thermal_add_hwmon_sysfs(tmdev->sensor[i].tzd))
 471                         dev_warn(tmdev->dev,
 472                                  "Failed to add hwmon sysfs attributes\n");
 473         }
 474
 475         return 0;
 476 }
 477
 478 static int sun8i_ths_probe(struct platform_device *pdev)
 479 {
 480         struct ths_device *tmdev;
 481         struct device *dev = &pdev->dev;
 482         int ret, irq;
 483
 484         tmdev = devm_kzalloc(dev, sizeof(*tmdev), GFP_KERNEL);
 485         if (!tmdev)
 486                 return -ENOMEM;
 487
 488         tmdev->dev = dev;
 489         tmdev->chip = of_device_get_match_data(&pdev->dev);
 490         if (!tmdev->chip)
 491                 return -EINVAL;
 492
 493         platform_set_drvdata(pdev, tmdev);
 494
 495         ret = sun8i_ths_resource_init(tmdev);
 496         if (ret)
 497                 return ret;
 498
 499         irq = platform_get_irq(pdev, 0);
 500         if (irq < 0)
 501                 return irq;
 502
 503         ret = tmdev->chip->init(tmdev);
 504         if (ret)
 505                 return ret;
 506
 507         ret = sun8i_ths_register(tmdev);
 508         if (ret)
 509                 return ret;
 510
 511         /*
 512          * Avoid entering the interrupt handler, the thermal device is not
 513          * registered yet, we deffer the registration of the interrupt to
 514          * the end.
 515          */
 516         ret = devm_request_threaded_irq(dev, irq, NULL,
 517                                         sun8i_irq_thread,
 518                                         IRQF_ONESHOT, "ths", tmdev);
 519         if (ret)
 520                 return ret;
 521
 522         return 0;
 523 }
 524
 525 static const struct ths_thermal_chip sun8i_a83t_ths = {
 526         .sensor_num = 3,
 527         .scale = 705,
 528         .offset = 191668,
 529         .temp_data_base = SUN8I_THS_TEMP_DATA,
 530         .calibrate = sun8i_h3_ths_calibrate,
 531         .init = sun8i_h3_thermal_init,
 532         .irq_ack = sun8i_h3_irq_ack,
 533         .calc_temp = sun8i_ths_calc_temp,
 534 };
 535
 536 static const struct ths_thermal_chip sun8i_h3_ths = {
 537         .sensor_num = 1,
 538         .scale = 1211,
 539         .offset = 217000,
 540         .has_mod_clk = true,
 541         .has_bus_clk_reset = true,
 542         .temp_data_base = SUN8I_THS_TEMP_DATA,
 543         .calibrate = sun8i_h3_ths_calibrate,
 544         .init = sun8i_h3_thermal_init,
 545         .irq_ack = sun8i_h3_irq_ack,
 546         .calc_temp = sun8i_ths_calc_temp,
 547 };
 548
 549 static const struct ths_thermal_chip sun8i_r40_ths = {
 550         .sensor_num = 2,
 551         .offset = 251086,
 552         .scale = 1130,
 553         .has_mod_clk = true,
 554         .has_bus_clk_reset = true,
 555         .temp_data_base = SUN8I_THS_TEMP_DATA,
 556         .calibrate = sun8i_h3_ths_calibrate,
 557         .init = sun8i_h3_thermal_init,
 558         .irq_ack = sun8i_h3_irq_ack,
 559         .calc_temp = sun8i_ths_calc_temp,
 560 };
 561
 562 static const struct ths_thermal_chip sun50i_a64_ths = {
 563         .sensor_num = 3,
 564         .offset = 260890,
 565         .scale = 1170,
 566         .has_mod_clk = true,
 567         .has_bus_clk_reset = true,
 568         .temp_data_base = SUN8I_THS_TEMP_DATA,
 569         .calibrate = sun8i_h3_ths_calibrate,
 570         .init = sun8i_h3_thermal_init,
 571         .irq_ack = sun8i_h3_irq_ack,
 572         .calc_temp = sun8i_ths_calc_temp,
 573 };
 574
 575 static const struct ths_thermal_chip sun50i_a100_ths = {
 576         .sensor_num = 3,
 577         .has_bus_clk_reset = true,
 578         .ft_deviation = 8000,
 579         .offset = 187744,
 580         .scale = 672,
 581         .temp_data_base = SUN50I_H6_THS_TEMP_DATA,
 582         .calibrate = sun50i_h6_ths_calibrate,
 583         .init = sun50i_h6_thermal_init,
 584         .irq_ack = sun50i_h6_irq_ack,
 585         .calc_temp = sun8i_ths_calc_temp,
 586 };
 587
 588 static const struct ths_thermal_chip sun50i_h5_ths = {
 589         .sensor_num = 2,
 590         .has_mod_clk = true,
 591         .has_bus_clk_reset = true,
 592         .temp_data_base = SUN8I_THS_TEMP_DATA,
 593         .calibrate = sun8i_h3_ths_calibrate,
 594         .init = sun8i_h3_thermal_init,
 595         .irq_ack = sun8i_h3_irq_ack,
 596         .calc_temp = sun50i_h5_calc_temp,
 597 };
 598
 599 static const struct ths_thermal_chip sun50i_h6_ths = {
 600         .sensor_num = 2,
 601         .has_bus_clk_reset = true,
 602         .ft_deviation = 7000,
 603         .offset = 187744,
 604         .scale = 672,
 605         .temp_data_base = SUN50I_H6_THS_TEMP_DATA,
 606         .calibrate = sun50i_h6_ths_calibrate,
 607         .init = sun50i_h6_thermal_init,
 608         .irq_ack = sun50i_h6_irq_ack,
 609         .calc_temp = sun8i_ths_calc_temp,
 610 };
 611
 612 static const struct of_device_id of_ths_match[] = {
 613         { .compatible = "allwinner,sun8i-a83t-ths", .data = &sun8i_a83t_ths },
 614         { .compatible = "allwinner,sun8i-h3-ths", .data = &sun8i_h3_ths },
 615         { .compatible = "allwinner,sun8i-r40-ths", .data = &sun8i_r40_ths },
 616         { .compatible = "allwinner,sun50i-a64-ths", .data = &sun50i_a64_ths },
 617         { .compatible = "allwinner,sun50i-a100-ths", .data = &sun50i_a100_ths },
 618         { .compatible = "allwinner,sun50i-h5-ths", .data = &sun50i_h5_ths },
 619         { .compatible = "allwinner,sun50i-h6-ths", .data = &sun50i_h6_ths },
 620         { /* sentinel */ },
 621 };
 622 MODULE_DEVICE_TABLE(of, of_ths_match);
 623
 624 static struct platform_driver ths_driver = {
 625         .probe = sun8i_ths_probe,
 626         .driver = {
 627                 .name = "sun8i-thermal",
 628                 .of_match_table = of_ths_match,
 629         },
 630 };
 631 module_platform_driver(ths_driver);
 632
 633 MODULE_DESCRIPTION("Thermal sensor driver for Allwinner SOC");
 634 MODULE_LICENSE("GPL v2");