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