drivers/thermal/rockchip_thermal.c

   1 /*
   2  * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/io.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/of_address.h>
  21 #include <linux/of_irq.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/reset.h>
  24 #include <linux/thermal.h>
  25
  26 /**
  27  * If the temperature over a period of time High,
  28  * the resulting TSHUT gave CRU module,let it reset the entire chip,
  29  * or via GPIO give PMIC.
  30  */
  31 enum tshut_mode {
  32         TSHUT_MODE_CRU = 0,
  33         TSHUT_MODE_GPIO,
  34 };
  35
  36 /**
  37  * the system Temperature Sensors tshut(tshut) polarity
  38  * the bit 8 is tshut polarity.
  39  * 0: low active, 1: high active
  40  */
  41 enum tshut_polarity {
  42         TSHUT_LOW_ACTIVE = 0,
  43         TSHUT_HIGH_ACTIVE,
  44 };
  45
  46 /**
  47  * The system has three Temperature Sensors.  channel 0 is reserved,
  48  * channel 1 is for CPU, and channel 2 is for GPU.
  49  */
  50 enum sensor_id {
  51         SENSOR_CPU = 1,
  52         SENSOR_GPU,
  53 };
  54
  55 struct rockchip_tsadc_chip {
  56         /* The hardware-controlled tshut property */
  57         long tshut_temp;
  58         enum tshut_mode tshut_mode;
  59         enum tshut_polarity tshut_polarity;
  60
  61         /* Chip-wide methods */
  62         void (*initialize)(void __iomem *reg, enum tshut_polarity p);
  63         void (*irq_ack)(void __iomem *reg);
  64         void (*control)(void __iomem *reg, bool on);
  65
  66         /* Per-sensor methods */
  67         int (*get_temp)(int chn, void __iomem *reg, long *temp);
  68         void (*set_tshut_temp)(int chn, void __iomem *reg, long temp);
  69         void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
  70 };
  71
  72 struct rockchip_thermal_sensor {
  73         struct rockchip_thermal_data *thermal;
  74         struct thermal_zone_device *tzd;
  75         enum sensor_id id;
  76 };
  77
  78 #define NUM_SENSORS     2 /* Ignore unused sensor 0 */
  79
  80 struct rockchip_thermal_data {
  81         const struct rockchip_tsadc_chip *chip;
  82         struct platform_device *pdev;
  83         struct reset_control *reset;
  84
  85         struct rockchip_thermal_sensor sensors[NUM_SENSORS];
  86
  87         struct clk *clk;
  88         struct clk *pclk;
  89
  90         void __iomem *regs;
  91
  92         long tshut_temp;
  93         enum tshut_mode tshut_mode;
  94         enum tshut_polarity tshut_polarity;
  95 };
  96
  97 /* TSADC V2 Sensor info define: */
  98 #define TSADCV2_AUTO_CON                        0x04
  99 #define TSADCV2_INT_EN                          0x08
 100 #define TSADCV2_INT_PD                          0x0c
 101 #define TSADCV2_DATA(chn)                       (0x20 + (chn) * 0x04)
 102 #define TSADCV2_COMP_SHUT(chn)                  (0x40 + (chn) * 0x04)
 103 #define TSADCV2_HIGHT_INT_DEBOUNCE              0x60
 104 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE            0x64
 105 #define TSADCV2_AUTO_PERIOD                     0x68
 106 #define TSADCV2_AUTO_PERIOD_HT                  0x6c
 107
 108 #define TSADCV2_AUTO_EN                         BIT(0)
 109 #define TSADCV2_AUTO_DISABLE                    ~BIT(0)
 110 #define TSADCV2_AUTO_SRC_EN(chn)                BIT(4 + (chn))
 111 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH        BIT(8)
 112 #define TSADCV2_AUTO_TSHUT_POLARITY_LOW         ~BIT(8)
 113
 114 #define TSADCV2_INT_SRC_EN(chn)                 BIT(chn)
 115 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn)          BIT(4 + (chn))
 116 #define TSADCV2_SHUT_2CRU_SRC_EN(chn)           BIT(8 + (chn))
 117
 118 #define TSADCV2_INT_PD_CLEAR                    ~BIT(8)
 119
 120 #define TSADCV2_DATA_MASK                       0xfff
 121 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT        4
 122 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT      4
 123 #define TSADCV2_AUTO_PERIOD_TIME                250 /* msec */
 124 #define TSADCV2_AUTO_PERIOD_HT_TIME             50  /* msec */
 125
 126 struct tsadc_table {
 127         unsigned long code;
 128         long temp;
 129 };
 130
 131 static const struct tsadc_table v2_code_table[] = {
 132         {TSADCV2_DATA_MASK, -40000},
 133         {3800, -40000},
 134         {3792, -35000},
 135         {3783, -30000},
 136         {3774, -25000},
 137         {3765, -20000},
 138         {3756, -15000},
 139         {3747, -10000},
 140         {3737, -5000},
 141         {3728, 0},
 142         {3718, 5000},
 143         {3708, 10000},
 144         {3698, 15000},
 145         {3688, 20000},
 146         {3678, 25000},
 147         {3667, 30000},
 148         {3656, 35000},
 149         {3645, 40000},
 150         {3634, 45000},
 151         {3623, 50000},
 152         {3611, 55000},
 153         {3600, 60000},
 154         {3588, 65000},
 155         {3575, 70000},
 156         {3563, 75000},
 157         {3550, 80000},
 158         {3537, 85000},
 159         {3524, 90000},
 160         {3510, 95000},
 161         {3496, 100000},
 162         {3482, 105000},
 163         {3467, 110000},
 164         {3452, 115000},
 165         {3437, 120000},
 166         {3421, 125000},
 167         {0, 125000},
 168 };
 169
 170 static u32 rk_tsadcv2_temp_to_code(long temp)
 171 {
 172         int high, low, mid;
 173
 174         low = 0;
 175         high = ARRAY_SIZE(v2_code_table) - 1;
 176         mid = (high + low) / 2;
 177
 178         if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp)
 179                 return 0;
 180
 181         while (low <= high) {
 182                 if (temp == v2_code_table[mid].temp)
 183                         return v2_code_table[mid].code;
 184                 else if (temp < v2_code_table[mid].temp)
 185                         high = mid - 1;
 186                 else
 187                         low = mid + 1;
 188                 mid = (low + high) / 2;
 189         }
 190
 191         return 0;
 192 }
 193
 194 static long rk_tsadcv2_code_to_temp(u32 code)
 195 {
 196         int high, low, mid;
 197
 198         low = 0;
 199         high = ARRAY_SIZE(v2_code_table) - 1;
 200         mid = (high + low) / 2;
 201
 202         if (code > v2_code_table[low].code || code < v2_code_table[high].code)
 203                 return 125000; /* No code available, return max temperature */
 204
 205         while (low <= high) {
 206                 if (code >= v2_code_table[mid].code && code <
 207                     v2_code_table[mid - 1].code)
 208                         return v2_code_table[mid].temp;
 209                 else if (code < v2_code_table[mid].code)
 210                         low = mid + 1;
 211                 else
 212                         high = mid - 1;
 213                 mid = (low + high) / 2;
 214         }
 215
 216         return 125000;
 217 }
 218
 219 /**
 220  * rk_tsadcv2_initialize - initialize TASDC Controller
 221  * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between
 222  * every two accessing of TSADC in normal operation.
 223  * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between
 224  * every two accessing of TSADC after the temperature is higher
 225  * than COM_SHUT or COM_INT.
 226  * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE,
 227  * if the temperature is higher than COMP_INT or COMP_SHUT for
 228  * "debounce" times, TSADC controller will generate interrupt or TSHUT.
 229  */
 230 static void rk_tsadcv2_initialize(void __iomem *regs,
 231                                   enum tshut_polarity tshut_polarity)
 232 {
 233         if (tshut_polarity == TSHUT_HIGH_ACTIVE)
 234                 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH),
 235                                regs + TSADCV2_AUTO_CON);
 236         else
 237                 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW),
 238                                regs + TSADCV2_AUTO_CON);
 239
 240         writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
 241         writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
 242                        regs + TSADCV2_HIGHT_INT_DEBOUNCE);
 243         writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
 244                        regs + TSADCV2_AUTO_PERIOD_HT);
 245         writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
 246                        regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
 247 }
 248
 249 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 250 {
 251         u32 val;
 252
 253         val = readl_relaxed(regs + TSADCV2_INT_PD);
 254         writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD);
 255 }
 256
 257 static void rk_tsadcv2_control(void __iomem *regs, bool enable)
 258 {
 259         u32 val;
 260
 261         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 262         if (enable)
 263                 val |= TSADCV2_AUTO_EN;
 264         else
 265                 val &= ~TSADCV2_AUTO_EN;
 266
 267         writel_relaxed(val, regs + TSADCV2_AUTO_CON);
 268 }
 269
 270 static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, long *temp)
 271 {
 272         u32 val;
 273
 274         /* the A/D value of the channel last conversion need some time */
 275         val = readl_relaxed(regs + TSADCV2_DATA(chn));
 276         if (val == 0)
 277                 return -EAGAIN;
 278
 279         *temp = rk_tsadcv2_code_to_temp(val);
 280
 281         return 0;
 282 }
 283
 284 static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
 285 {
 286         u32 tshut_value, val;
 287
 288         tshut_value = rk_tsadcv2_temp_to_code(temp);
 289         writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
 290
 291         /* TSHUT will be valid */
 292         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 293         writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
 294 }
 295
 296 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
 297                                   enum tshut_mode mode)
 298 {
 299         u32 val;
 300
 301         val = readl_relaxed(regs + TSADCV2_INT_EN);
 302         if (mode == TSHUT_MODE_GPIO) {
 303                 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
 304                 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 305         } else {
 306                 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 307                 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
 308         }
 309
 310         writel_relaxed(val, regs + TSADCV2_INT_EN);
 311 }
 312
 313 static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
 314         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 315         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 316         .tshut_temp = 95000,
 317
 318         .initialize = rk_tsadcv2_initialize,
 319         .irq_ack = rk_tsadcv2_irq_ack,
 320         .control = rk_tsadcv2_control,
 321         .get_temp = rk_tsadcv2_get_temp,
 322         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 323         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 324 };
 325
 326 static const struct of_device_id of_rockchip_thermal_match[] = {
 327         {
 328                 .compatible = "rockchip,rk3288-tsadc",
 329                 .data = (void *)&rk3288_tsadc_data,
 330         },
 331         { /* end */ },
 332 };
 333 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
 334
 335 static void
 336 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
 337 {
 338         struct thermal_zone_device *tzd = sensor->tzd;
 339
 340         tzd->ops->set_mode(tzd,
 341                 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
 342 }
 343
 344 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
 345 {
 346         struct rockchip_thermal_data *thermal = dev;
 347         int i;
 348
 349         dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
 350
 351         thermal->chip->irq_ack(thermal->regs);
 352
 353         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 354                 thermal_zone_device_update(thermal->sensors[i].tzd);
 355
 356         return IRQ_HANDLED;
 357 }
 358
 359 static int rockchip_thermal_get_temp(void *_sensor, long *out_temp)
 360 {
 361         struct rockchip_thermal_sensor *sensor = _sensor;
 362         struct rockchip_thermal_data *thermal = sensor->thermal;
 363         const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
 364         int retval;
 365
 366         retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp);
 367         dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %ld, retval: %d\n",
 368                 sensor->id, *out_temp, retval);
 369
 370         return retval;
 371 }
 372
 373 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
 374         .get_temp = rockchip_thermal_get_temp,
 375 };
 376
 377 static int rockchip_configure_from_dt(struct device *dev,
 378                                       struct device_node *np,
 379                                       struct rockchip_thermal_data *thermal)
 380 {
 381         u32 shut_temp, tshut_mode, tshut_polarity;
 382
 383         if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
 384                 dev_warn(dev,
 385                          "Missing tshut temp property, using default %ld\n",
 386                          thermal->chip->tshut_temp);
 387                 thermal->tshut_temp = thermal->chip->tshut_temp;
 388         } else {
 389                 thermal->tshut_temp = shut_temp;
 390         }
 391
 392         if (thermal->tshut_temp > INT_MAX) {
 393                 dev_err(dev, "Invalid tshut temperature specified: %ld\n",
 394                         thermal->tshut_temp);
 395                 return -ERANGE;
 396         }
 397
 398         if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
 399                 dev_warn(dev,
 400                          "Missing tshut mode property, using default (%s)\n",
 401                          thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
 402                                 "gpio" : "cru");
 403                 thermal->tshut_mode = thermal->chip->tshut_mode;
 404         } else {
 405                 thermal->tshut_mode = tshut_mode;
 406         }
 407
 408         if (thermal->tshut_mode > 1) {
 409                 dev_err(dev, "Invalid tshut mode specified: %d\n",
 410                         thermal->tshut_mode);
 411                 return -EINVAL;
 412         }
 413
 414         if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
 415                                  &tshut_polarity)) {
 416                 dev_warn(dev,
 417                          "Missing tshut-polarity property, using default (%s)\n",
 418                          thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
 419                                 "low" : "high");
 420                 thermal->tshut_polarity = thermal->chip->tshut_polarity;
 421         } else {
 422                 thermal->tshut_polarity = tshut_polarity;
 423         }
 424
 425         if (thermal->tshut_polarity > 1) {
 426                 dev_err(dev, "Invalid tshut-polarity specified: %d\n",
 427                         thermal->tshut_polarity);
 428                 return -EINVAL;
 429         }
 430
 431         return 0;
 432 }
 433
 434 static int
 435 rockchip_thermal_register_sensor(struct platform_device *pdev,
 436                                  struct rockchip_thermal_data *thermal,
 437                                  struct rockchip_thermal_sensor *sensor,
 438                                  enum sensor_id id)
 439 {
 440         const struct rockchip_tsadc_chip *tsadc = thermal->chip;
 441         int error;
 442
 443         tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
 444         tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp);
 445
 446         sensor->thermal = thermal;
 447         sensor->id = id;
 448         sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
 449                                                       &rockchip_of_thermal_ops);
 450         if (IS_ERR(sensor->tzd)) {
 451                 error = PTR_ERR(sensor->tzd);
 452                 dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
 453                         id, error);
 454                 return error;
 455         }
 456
 457         return 0;
 458 }
 459
 460 /*
 461  * Reset TSADC Controller, reset all tsadc registers.
 462  */
 463 static void rockchip_thermal_reset_controller(struct reset_control *reset)
 464 {
 465         reset_control_assert(reset);
 466         usleep_range(10, 20);
 467         reset_control_deassert(reset);
 468 }
 469
 470 static int rockchip_thermal_probe(struct platform_device *pdev)
 471 {
 472         struct device_node *np = pdev->dev.of_node;
 473         struct rockchip_thermal_data *thermal;
 474         const struct of_device_id *match;
 475         struct resource *res;
 476         int irq;
 477         int i;
 478         int error;
 479
 480         match = of_match_node(of_rockchip_thermal_match, np);
 481         if (!match)
 482                 return -ENXIO;
 483
 484         irq = platform_get_irq(pdev, 0);
 485         if (irq < 0) {
 486                 dev_err(&pdev->dev, "no irq resource?\n");
 487                 return -EINVAL;
 488         }
 489
 490         thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
 491                                GFP_KERNEL);
 492         if (!thermal)
 493                 return -ENOMEM;
 494
 495         thermal->pdev = pdev;
 496
 497         thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
 498         if (!thermal->chip)
 499                 return -EINVAL;
 500
 501         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 502         thermal->regs = devm_ioremap_resource(&pdev->dev, res);
 503         if (IS_ERR(thermal->regs))
 504                 return PTR_ERR(thermal->regs);
 505
 506         thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
 507         if (IS_ERR(thermal->reset)) {
 508                 error = PTR_ERR(thermal->reset);
 509                 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
 510                 return error;
 511         }
 512
 513         thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
 514         if (IS_ERR(thermal->clk)) {
 515                 error = PTR_ERR(thermal->clk);
 516                 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
 517                 return error;
 518         }
 519
 520         thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
 521         if (IS_ERR(thermal->pclk)) {
 522                 error = PTR_ERR(thermal->clk);
 523                 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
 524                         error);
 525                 return error;
 526         }
 527
 528         error = clk_prepare_enable(thermal->clk);
 529         if (error) {
 530                 dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
 531                         error);
 532                 return error;
 533         }
 534
 535         error = clk_prepare_enable(thermal->pclk);
 536         if (error) {
 537                 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
 538                 goto err_disable_clk;
 539         }
 540
 541         rockchip_thermal_reset_controller(thermal->reset);
 542
 543         error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
 544         if (error) {
 545                 dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
 546                         error);
 547                 goto err_disable_pclk;
 548         }
 549
 550         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 551
 552         error = rockchip_thermal_register_sensor(pdev, thermal,
 553                                                  &thermal->sensors[0],
 554                                                  SENSOR_CPU);
 555         if (error) {
 556                 dev_err(&pdev->dev,
 557                         "failed to register CPU thermal sensor: %d\n", error);
 558                 goto err_disable_pclk;
 559         }
 560
 561         error = rockchip_thermal_register_sensor(pdev, thermal,
 562                                                  &thermal->sensors[1],
 563                                                  SENSOR_GPU);
 564         if (error) {
 565                 dev_err(&pdev->dev,
 566                         "failed to register GPU thermal sensor: %d\n", error);
 567                 goto err_unregister_cpu_sensor;
 568         }
 569
 570         error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 571                                           &rockchip_thermal_alarm_irq_thread,
 572                                           IRQF_ONESHOT,
 573                                           "rockchip_thermal", thermal);
 574         if (error) {
 575                 dev_err(&pdev->dev,
 576                         "failed to request tsadc irq: %d\n", error);
 577                 goto err_unregister_gpu_sensor;
 578         }
 579
 580         thermal->chip->control(thermal->regs, true);
 581
 582         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 583                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 584
 585         platform_set_drvdata(pdev, thermal);
 586
 587         return 0;
 588
 589 err_unregister_gpu_sensor:
 590         thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd);
 591 err_unregister_cpu_sensor:
 592         thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd);
 593 err_disable_pclk:
 594         clk_disable_unprepare(thermal->pclk);
 595 err_disable_clk:
 596         clk_disable_unprepare(thermal->clk);
 597
 598         return error;
 599 }
 600
 601 static int rockchip_thermal_remove(struct platform_device *pdev)
 602 {
 603         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 604         int i;
 605
 606         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
 607                 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
 608
 609                 rockchip_thermal_toggle_sensor(sensor, false);
 610                 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
 611         }
 612
 613         thermal->chip->control(thermal->regs, false);
 614
 615         clk_disable_unprepare(thermal->pclk);
 616         clk_disable_unprepare(thermal->clk);
 617
 618         return 0;
 619 }
 620
 621 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 622 {
 623         struct platform_device *pdev = to_platform_device(dev);
 624         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 625         int i;
 626
 627         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 628                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
 629
 630         thermal->chip->control(thermal->regs, false);
 631
 632         clk_disable(thermal->pclk);
 633         clk_disable(thermal->clk);
 634
 635         return 0;
 636 }
 637
 638 static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 639 {
 640         struct platform_device *pdev = to_platform_device(dev);
 641         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 642         int i;
 643         int error;
 644
 645         error = clk_enable(thermal->clk);
 646         if (error)
 647                 return error;
 648
 649         error = clk_enable(thermal->pclk);
 650         if (error)
 651                 return error;
 652
 653         rockchip_thermal_reset_controller(thermal->reset);
 654
 655         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 656
 657         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
 658                 enum sensor_id id = thermal->sensors[i].id;
 659
 660                 thermal->chip->set_tshut_mode(id, thermal->regs,
 661                                               thermal->tshut_mode);
 662                 thermal->chip->set_tshut_temp(id, thermal->regs,
 663                                               thermal->tshut_temp);
 664         }
 665
 666         thermal->chip->control(thermal->regs, true);
 667
 668         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 669                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 670
 671         return 0;
 672 }
 673
 674 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
 675                          rockchip_thermal_suspend, rockchip_thermal_resume);
 676
 677 static struct platform_driver rockchip_thermal_driver = {
 678         .driver = {
 679                 .name = "rockchip-thermal",
 680                 .pm = &rockchip_thermal_pm_ops,
 681                 .of_match_table = of_rockchip_thermal_match,
 682         },
 683         .probe = rockchip_thermal_probe,
 684         .remove = rockchip_thermal_remove,
 685 };
 686
 687 module_platform_driver(rockchip_thermal_driver);
 688
 689 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
 690 MODULE_AUTHOR("Rockchip, Inc.");
 691 MODULE_LICENSE("GPL v2");
 692 MODULE_ALIAS("platform:rockchip-thermal");