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 #include <linux/pinctrl/consumer.h>
  26
  27 /**
  28  * If the temperature over a period of time High,
  29  * the resulting TSHUT gave CRU module,let it reset the entire chip,
  30  * or via GPIO give PMIC.
  31  */
  32 enum tshut_mode {
  33         TSHUT_MODE_CRU = 0,
  34         TSHUT_MODE_GPIO,
  35 };
  36
  37 /**
  38  * the system Temperature Sensors tshut(tshut) polarity
  39  * the bit 8 is tshut polarity.
  40  * 0: low active, 1: high active
  41  */
  42 enum tshut_polarity {
  43         TSHUT_LOW_ACTIVE = 0,
  44         TSHUT_HIGH_ACTIVE,
  45 };
  46
  47 /**
  48  * The system has two Temperature Sensors.
  49  * sensor0 is for CPU, and sensor1 is for GPU.
  50  */
  51 enum sensor_id {
  52         SENSOR_CPU = 0,
  53         SENSOR_GPU,
  54 };
  55
  56 /**
  57  * The max sensors is two in rockchip SoCs.
  58  * Two sensors: CPU and GPU sensor.
  59  */
  60 #define SOC_MAX_SENSORS 2
  61
  62 struct chip_tsadc_table {
  63         const struct tsadc_table *id;
  64
  65         /* the array table size*/
  66         unsigned int length;
  67
  68         /* that analogic mask data */
  69         u32 data_mask;
  70 };
  71
  72 struct rockchip_tsadc_chip {
  73         /* The sensor id of chip correspond to the ADC channel */
  74         int chn_id[SOC_MAX_SENSORS];
  75         int chn_num;
  76
  77         /* The hardware-controlled tshut property */
  78         long tshut_temp;
  79         enum tshut_mode tshut_mode;
  80         enum tshut_polarity tshut_polarity;
  81
  82         /* Chip-wide methods */
  83         void (*initialize)(void __iomem *reg, enum tshut_polarity p);
  84         void (*irq_ack)(void __iomem *reg);
  85         void (*control)(void __iomem *reg, bool on);
  86
  87         /* Per-sensor methods */
  88         int (*get_temp)(struct chip_tsadc_table table,
  89                         int chn, void __iomem *reg, int *temp);
  90         void (*set_tshut_temp)(struct chip_tsadc_table table,
  91                                int chn, void __iomem *reg, long temp);
  92         void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
  93
  94         /* Per-table methods */
  95         struct chip_tsadc_table table;
  96 };
  97
  98 struct rockchip_thermal_sensor {
  99         struct rockchip_thermal_data *thermal;
 100         struct thermal_zone_device *tzd;
 101         int id;
 102 };
 103
 104 struct rockchip_thermal_data {
 105         const struct rockchip_tsadc_chip *chip;
 106         struct platform_device *pdev;
 107         struct reset_control *reset;
 108
 109         struct rockchip_thermal_sensor sensors[SOC_MAX_SENSORS];
 110
 111         struct clk *clk;
 112         struct clk *pclk;
 113
 114         void __iomem *regs;
 115
 116         long tshut_temp;
 117         enum tshut_mode tshut_mode;
 118         enum tshut_polarity tshut_polarity;
 119 };
 120
 121 /* TSADC Sensor info define: */
 122 #define TSADCV2_AUTO_CON                        0x04
 123 #define TSADCV2_INT_EN                          0x08
 124 #define TSADCV2_INT_PD                          0x0c
 125 #define TSADCV2_DATA(chn)                       (0x20 + (chn) * 0x04)
 126 #define TSADCV2_COMP_SHUT(chn)                  (0x40 + (chn) * 0x04)
 127 #define TSADCV2_HIGHT_INT_DEBOUNCE              0x60
 128 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE            0x64
 129 #define TSADCV2_AUTO_PERIOD                     0x68
 130 #define TSADCV2_AUTO_PERIOD_HT                  0x6c
 131
 132 #define TSADCV2_AUTO_EN                         BIT(0)
 133 #define TSADCV2_AUTO_SRC_EN(chn)                BIT(4 + (chn))
 134 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH        BIT(8)
 135
 136 #define TSADCV2_INT_SRC_EN(chn)                 BIT(chn)
 137 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn)          BIT(4 + (chn))
 138 #define TSADCV2_SHUT_2CRU_SRC_EN(chn)           BIT(8 + (chn))
 139
 140 #define TSADCV2_INT_PD_CLEAR_MASK               ~BIT(8)
 141
 142 #define TSADCV2_DATA_MASK                       0xfff
 143 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT        4
 144 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT      4
 145 #define TSADCV2_AUTO_PERIOD_TIME                250 /* msec */
 146 #define TSADCV2_AUTO_PERIOD_HT_TIME             50  /* msec */
 147
 148 struct tsadc_table {
 149         u32 code;
 150         long temp;
 151 };
 152
 153 static const struct tsadc_table v2_code_table[] = {
 154         {TSADCV2_DATA_MASK, -40000},
 155         {3800, -40000},
 156         {3792, -35000},
 157         {3783, -30000},
 158         {3774, -25000},
 159         {3765, -20000},
 160         {3756, -15000},
 161         {3747, -10000},
 162         {3737, -5000},
 163         {3728, 0},
 164         {3718, 5000},
 165         {3708, 10000},
 166         {3698, 15000},
 167         {3688, 20000},
 168         {3678, 25000},
 169         {3667, 30000},
 170         {3656, 35000},
 171         {3645, 40000},
 172         {3634, 45000},
 173         {3623, 50000},
 174         {3611, 55000},
 175         {3600, 60000},
 176         {3588, 65000},
 177         {3575, 70000},
 178         {3563, 75000},
 179         {3550, 80000},
 180         {3537, 85000},
 181         {3524, 90000},
 182         {3510, 95000},
 183         {3496, 100000},
 184         {3482, 105000},
 185         {3467, 110000},
 186         {3452, 115000},
 187         {3437, 120000},
 188         {3421, 125000},
 189 };
 190
 191 static u32 rk_tsadcv2_temp_to_code(struct chip_tsadc_table table,
 192                                    long temp)
 193 {
 194         int high, low, mid;
 195
 196         low = 0;
 197         high = table.length - 1;
 198         mid = (high + low) / 2;
 199
 200         if (temp < table.id[low].temp || temp > table.id[high].temp)
 201                 return 0;
 202
 203         while (low <= high) {
 204                 if (temp == table.id[mid].temp)
 205                         return table.id[mid].code;
 206                 else if (temp < table.id[mid].temp)
 207                         high = mid - 1;
 208                 else
 209                         low = mid + 1;
 210                 mid = (low + high) / 2;
 211         }
 212
 213         return 0;
 214 }
 215
 216 static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
 217                                    int *temp)
 218 {
 219         unsigned int low = 1;
 220         unsigned int high = table.length - 1;
 221         unsigned int mid = (low + high) / 2;
 222         unsigned int num;
 223         unsigned long denom;
 224
 225         WARN_ON(table.length < 2);
 226
 227         code &= table.data_mask;
 228         if (code < table.id[high].code)
 229                 return -EAGAIN;         /* Incorrect reading */
 230
 231         while (low <= high) {
 232                 if (code >= table.id[mid].code &&
 233                     code < table.id[mid - 1].code)
 234                         break;
 235                 else if (code < table.id[mid].code)
 236                         low = mid + 1;
 237                 else
 238                         high = mid - 1;
 239                 mid = (low + high) / 2;
 240         }
 241
 242         /*
 243          * The 5C granularity provided by the table is too much. Let's
 244          * assume that the relationship between sensor readings and
 245          * temperature between 2 table entries is linear and interpolate
 246          * to produce less granular result.
 247          */
 248         num = table.id[mid].temp - v2_code_table[mid - 1].temp;
 249         num *= table.id[mid - 1].code - code;
 250         denom = table.id[mid - 1].code - table.id[mid].code;
 251         *temp = table.id[mid - 1].temp + (num / denom);
 252
 253         return 0;
 254 }
 255
 256 /**
 257  * rk_tsadcv2_initialize - initialize TASDC Controller.
 258  *
 259  * (1) Set TSADC_V2_AUTO_PERIOD:
 260  *     Configure the interleave between every two accessing of
 261  *     TSADC in normal operation.
 262  *
 263  * (2) Set TSADCV2_AUTO_PERIOD_HT:
 264  *     Configure the interleave between every two accessing of
 265  *     TSADC after the temperature is higher than COM_SHUT or COM_INT.
 266  *
 267  * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE:
 268  *     If the temperature is higher than COMP_INT or COMP_SHUT for
 269  *     "debounce" times, TSADC controller will generate interrupt or TSHUT.
 270  */
 271 static void rk_tsadcv2_initialize(void __iomem *regs,
 272                                   enum tshut_polarity tshut_polarity)
 273 {
 274         if (tshut_polarity == TSHUT_HIGH_ACTIVE)
 275                 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 276                                regs + TSADCV2_AUTO_CON);
 277         else
 278                 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 279                                regs + TSADCV2_AUTO_CON);
 280
 281         writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
 282         writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
 283                        regs + TSADCV2_HIGHT_INT_DEBOUNCE);
 284         writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
 285                        regs + TSADCV2_AUTO_PERIOD_HT);
 286         writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
 287                        regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
 288 }
 289
 290 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 291 {
 292         u32 val;
 293
 294         val = readl_relaxed(regs + TSADCV2_INT_PD);
 295         writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
 296 }
 297
 298 static void rk_tsadcv2_control(void __iomem *regs, bool enable)
 299 {
 300         u32 val;
 301
 302         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 303         if (enable)
 304                 val |= TSADCV2_AUTO_EN;
 305         else
 306                 val &= ~TSADCV2_AUTO_EN;
 307
 308         writel_relaxed(val, regs + TSADCV2_AUTO_CON);
 309 }
 310
 311 static int rk_tsadcv2_get_temp(struct chip_tsadc_table table,
 312                                int chn, void __iomem *regs, int *temp)
 313 {
 314         u32 val;
 315
 316         val = readl_relaxed(regs + TSADCV2_DATA(chn));
 317
 318         return rk_tsadcv2_code_to_temp(table, val, temp);
 319 }
 320
 321 static void rk_tsadcv2_tshut_temp(struct chip_tsadc_table table,
 322                                   int chn, void __iomem *regs, long temp)
 323 {
 324         u32 tshut_value, val;
 325
 326         tshut_value = rk_tsadcv2_temp_to_code(table, temp);
 327         writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
 328
 329         /* TSHUT will be valid */
 330         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 331         writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
 332 }
 333
 334 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
 335                                   enum tshut_mode mode)
 336 {
 337         u32 val;
 338
 339         val = readl_relaxed(regs + TSADCV2_INT_EN);
 340         if (mode == TSHUT_MODE_GPIO) {
 341                 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
 342                 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 343         } else {
 344                 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 345                 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
 346         }
 347
 348         writel_relaxed(val, regs + TSADCV2_INT_EN);
 349 }
 350
 351 static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
 352         .chn_id[SENSOR_CPU] = 1, /* cpu sensor is channel 1 */
 353         .chn_id[SENSOR_GPU] = 2, /* gpu sensor is channel 2 */
 354         .chn_num = 2, /* two channels for tsadc */
 355
 356         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 357         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 358         .tshut_temp = 95000,
 359
 360         .initialize = rk_tsadcv2_initialize,
 361         .irq_ack = rk_tsadcv2_irq_ack,
 362         .control = rk_tsadcv2_control,
 363         .get_temp = rk_tsadcv2_get_temp,
 364         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 365         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 366
 367         .table = {
 368                 .id = v2_code_table,
 369                 .length = ARRAY_SIZE(v2_code_table),
 370                 .data_mask = TSADCV2_DATA_MASK,
 371         },
 372 };
 373
 374 static const struct of_device_id of_rockchip_thermal_match[] = {
 375         {
 376                 .compatible = "rockchip,rk3288-tsadc",
 377                 .data = (void *)&rk3288_tsadc_data,
 378         },
 379         { /* end */ },
 380 };
 381 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
 382
 383 static void
 384 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
 385 {
 386         struct thermal_zone_device *tzd = sensor->tzd;
 387
 388         tzd->ops->set_mode(tzd,
 389                 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
 390 }
 391
 392 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
 393 {
 394         struct rockchip_thermal_data *thermal = dev;
 395         int i;
 396
 397         dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
 398
 399         thermal->chip->irq_ack(thermal->regs);
 400
 401         for (i = 0; i < thermal->chip->chn_num; i++)
 402                 thermal_zone_device_update(thermal->sensors[i].tzd);
 403
 404         return IRQ_HANDLED;
 405 }
 406
 407 static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
 408 {
 409         struct rockchip_thermal_sensor *sensor = _sensor;
 410         struct rockchip_thermal_data *thermal = sensor->thermal;
 411         const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
 412         int retval;
 413
 414         retval = tsadc->get_temp(tsadc->table,
 415                                  sensor->id, thermal->regs, out_temp);
 416         dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
 417                 sensor->id, *out_temp, retval);
 418
 419         return retval;
 420 }
 421
 422 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
 423         .get_temp = rockchip_thermal_get_temp,
 424 };
 425
 426 static int rockchip_configure_from_dt(struct device *dev,
 427                                       struct device_node *np,
 428                                       struct rockchip_thermal_data *thermal)
 429 {
 430         u32 shut_temp, tshut_mode, tshut_polarity;
 431
 432         if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
 433                 dev_warn(dev,
 434                          "Missing tshut temp property, using default %ld\n",
 435                          thermal->chip->tshut_temp);
 436                 thermal->tshut_temp = thermal->chip->tshut_temp;
 437         } else {
 438                 thermal->tshut_temp = shut_temp;
 439         }
 440
 441         if (thermal->tshut_temp > INT_MAX) {
 442                 dev_err(dev, "Invalid tshut temperature specified: %ld\n",
 443                         thermal->tshut_temp);
 444                 return -ERANGE;
 445         }
 446
 447         if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
 448                 dev_warn(dev,
 449                          "Missing tshut mode property, using default (%s)\n",
 450                          thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
 451                                 "gpio" : "cru");
 452                 thermal->tshut_mode = thermal->chip->tshut_mode;
 453         } else {
 454                 thermal->tshut_mode = tshut_mode;
 455         }
 456
 457         if (thermal->tshut_mode > 1) {
 458                 dev_err(dev, "Invalid tshut mode specified: %d\n",
 459                         thermal->tshut_mode);
 460                 return -EINVAL;
 461         }
 462
 463         if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
 464                                  &tshut_polarity)) {
 465                 dev_warn(dev,
 466                          "Missing tshut-polarity property, using default (%s)\n",
 467                          thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
 468                                 "low" : "high");
 469                 thermal->tshut_polarity = thermal->chip->tshut_polarity;
 470         } else {
 471                 thermal->tshut_polarity = tshut_polarity;
 472         }
 473
 474         if (thermal->tshut_polarity > 1) {
 475                 dev_err(dev, "Invalid tshut-polarity specified: %d\n",
 476                         thermal->tshut_polarity);
 477                 return -EINVAL;
 478         }
 479
 480         return 0;
 481 }
 482
 483 static int
 484 rockchip_thermal_register_sensor(struct platform_device *pdev,
 485                                  struct rockchip_thermal_data *thermal,
 486                                  struct rockchip_thermal_sensor *sensor,
 487                                  int id)
 488 {
 489         const struct rockchip_tsadc_chip *tsadc = thermal->chip;
 490         int error;
 491
 492         tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
 493         tsadc->set_tshut_temp(tsadc->table, id, thermal->regs,
 494                               thermal->tshut_temp);
 495
 496         sensor->thermal = thermal;
 497         sensor->id = id;
 498         sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
 499                                                       &rockchip_of_thermal_ops);
 500         if (IS_ERR(sensor->tzd)) {
 501                 error = PTR_ERR(sensor->tzd);
 502                 dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
 503                         id, error);
 504                 return error;
 505         }
 506
 507         return 0;
 508 }
 509
 510 /*
 511  * Reset TSADC Controller, reset all tsadc registers.
 512  */
 513 static void rockchip_thermal_reset_controller(struct reset_control *reset)
 514 {
 515         reset_control_assert(reset);
 516         usleep_range(10, 20);
 517         reset_control_deassert(reset);
 518 }
 519
 520 static int rockchip_thermal_probe(struct platform_device *pdev)
 521 {
 522         struct device_node *np = pdev->dev.of_node;
 523         struct rockchip_thermal_data *thermal;
 524         const struct of_device_id *match;
 525         struct resource *res;
 526         int irq;
 527         int i, j;
 528         int error;
 529
 530         match = of_match_node(of_rockchip_thermal_match, np);
 531         if (!match)
 532                 return -ENXIO;
 533
 534         irq = platform_get_irq(pdev, 0);
 535         if (irq < 0) {
 536                 dev_err(&pdev->dev, "no irq resource?\n");
 537                 return -EINVAL;
 538         }
 539
 540         thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
 541                                GFP_KERNEL);
 542         if (!thermal)
 543                 return -ENOMEM;
 544
 545         thermal->pdev = pdev;
 546
 547         thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
 548         if (!thermal->chip)
 549                 return -EINVAL;
 550
 551         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 552         thermal->regs = devm_ioremap_resource(&pdev->dev, res);
 553         if (IS_ERR(thermal->regs))
 554                 return PTR_ERR(thermal->regs);
 555
 556         thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
 557         if (IS_ERR(thermal->reset)) {
 558                 error = PTR_ERR(thermal->reset);
 559                 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
 560                 return error;
 561         }
 562
 563         thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
 564         if (IS_ERR(thermal->clk)) {
 565                 error = PTR_ERR(thermal->clk);
 566                 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
 567                 return error;
 568         }
 569
 570         thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
 571         if (IS_ERR(thermal->pclk)) {
 572                 error = PTR_ERR(thermal->pclk);
 573                 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
 574                         error);
 575                 return error;
 576         }
 577
 578         error = clk_prepare_enable(thermal->clk);
 579         if (error) {
 580                 dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
 581                         error);
 582                 return error;
 583         }
 584
 585         error = clk_prepare_enable(thermal->pclk);
 586         if (error) {
 587                 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
 588                 goto err_disable_clk;
 589         }
 590
 591         rockchip_thermal_reset_controller(thermal->reset);
 592
 593         error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
 594         if (error) {
 595                 dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
 596                         error);
 597                 goto err_disable_pclk;
 598         }
 599
 600         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 601
 602         for (i = 0; i < thermal->chip->chn_num; i++) {
 603                 error = rockchip_thermal_register_sensor(pdev, thermal,
 604                                                 &thermal->sensors[i],
 605                                                 thermal->chip->chn_id[i]);
 606                 if (error) {
 607                         dev_err(&pdev->dev,
 608                                 "failed to register sensor[%d] : error = %d\n",
 609                                 i, error);
 610                         for (j = 0; j < i; j++)
 611                                 thermal_zone_of_sensor_unregister(&pdev->dev,
 612                                                 thermal->sensors[j].tzd);
 613                         goto err_disable_pclk;
 614                 }
 615         }
 616
 617         error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 618                                           &rockchip_thermal_alarm_irq_thread,
 619                                           IRQF_ONESHOT,
 620                                           "rockchip_thermal", thermal);
 621         if (error) {
 622                 dev_err(&pdev->dev,
 623                         "failed to request tsadc irq: %d\n", error);
 624                 goto err_unregister_sensor;
 625         }
 626
 627         thermal->chip->control(thermal->regs, true);
 628
 629         for (i = 0; i < thermal->chip->chn_num; i++)
 630                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 631
 632         platform_set_drvdata(pdev, thermal);
 633
 634         return 0;
 635
 636 err_unregister_sensor:
 637         while (i--)
 638                 thermal_zone_of_sensor_unregister(&pdev->dev,
 639                                                   thermal->sensors[i].tzd);
 640
 641 err_disable_pclk:
 642         clk_disable_unprepare(thermal->pclk);
 643 err_disable_clk:
 644         clk_disable_unprepare(thermal->clk);
 645
 646         return error;
 647 }
 648
 649 static int rockchip_thermal_remove(struct platform_device *pdev)
 650 {
 651         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 652         int i;
 653
 654         for (i = 0; i < thermal->chip->chn_num; i++) {
 655                 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
 656
 657                 rockchip_thermal_toggle_sensor(sensor, false);
 658                 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
 659         }
 660
 661         thermal->chip->control(thermal->regs, false);
 662
 663         clk_disable_unprepare(thermal->pclk);
 664         clk_disable_unprepare(thermal->clk);
 665
 666         return 0;
 667 }
 668
 669 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 670 {
 671         struct platform_device *pdev = to_platform_device(dev);
 672         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 673         int i;
 674
 675         for (i = 0; i < thermal->chip->chn_num; i++)
 676                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
 677
 678         thermal->chip->control(thermal->regs, false);
 679
 680         clk_disable(thermal->pclk);
 681         clk_disable(thermal->clk);
 682
 683         pinctrl_pm_select_sleep_state(dev);
 684
 685         return 0;
 686 }
 687
 688 static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 689 {
 690         struct platform_device *pdev = to_platform_device(dev);
 691         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 692         int i;
 693         int error;
 694
 695         error = clk_enable(thermal->clk);
 696         if (error)
 697                 return error;
 698
 699         error = clk_enable(thermal->pclk);
 700         if (error)
 701                 return error;
 702
 703         rockchip_thermal_reset_controller(thermal->reset);
 704
 705         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 706
 707         for (i = 0; i < thermal->chip->chn_num; i++) {
 708                 int id = thermal->sensors[i].id;
 709
 710                 thermal->chip->set_tshut_mode(id, thermal->regs,
 711                                               thermal->tshut_mode);
 712                 thermal->chip->set_tshut_temp(thermal->chip->table,
 713                                               id, thermal->regs,
 714                                               thermal->tshut_temp);
 715         }
 716
 717         thermal->chip->control(thermal->regs, true);
 718
 719         for (i = 0; i < thermal->chip->chn_num; i++)
 720                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 721
 722         pinctrl_pm_select_default_state(dev);
 723
 724         return 0;
 725 }
 726
 727 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
 728                          rockchip_thermal_suspend, rockchip_thermal_resume);
 729
 730 static struct platform_driver rockchip_thermal_driver = {
 731         .driver = {
 732                 .name = "rockchip-thermal",
 733                 .pm = &rockchip_thermal_pm_ops,
 734                 .of_match_table = of_rockchip_thermal_match,
 735         },
 736         .probe = rockchip_thermal_probe,
 737         .remove = rockchip_thermal_remove,
 738 };
 739
 740 module_platform_driver(rockchip_thermal_driver);
 741
 742 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
 743 MODULE_AUTHOR("Rockchip, Inc.");
 744 MODULE_LICENSE("GPL v2");
 745 MODULE_ALIAS("platform:rockchip-thermal");