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, int *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 int rk_tsadcv2_code_to_temp(u32 code)
 195 {
 196         unsigned int low = 0;
 197         unsigned int high = ARRAY_SIZE(v2_code_table) - 1;
 198         unsigned int mid = (low + high) / 2;
 199         unsigned int num;
 200         unsigned long denom;
 201
 202         /* Invalid code, return -EAGAIN */
 203         if (code > TSADCV2_DATA_MASK)
 204                 return -EAGAIN;
 205
 206         while (low <= high && mid) {
 207                 if (code >= v2_code_table[mid].code &&
 208                     code < v2_code_table[mid - 1].code)
 209                         break;
 210                 else if (code < v2_code_table[mid].code)
 211                         low = mid + 1;
 212                 else
 213                         high = mid - 1;
 214                 mid = (low + high) / 2;
 215         }
 216
 217         /*
 218          * The 5C granularity provided by the table is too much. Let's
 219          * assume that the relationship between sensor readings and
 220          * temperature between 2 table entries is linear and interpolate
 221          * to produce less granular result.
 222          */
 223         num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp;
 224         num *= v2_code_table[mid - 1].code - code;
 225         denom = v2_code_table[mid - 1].code - v2_code_table[mid].code;
 226         return v2_code_table[mid - 1].temp + (num / denom);
 227 }
 228
 229 /**
 230  * rk_tsadcv2_initialize - initialize TASDC Controller
 231  * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between
 232  * every two accessing of TSADC in normal operation.
 233  * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between
 234  * every two accessing of TSADC after the temperature is higher
 235  * than COM_SHUT or COM_INT.
 236  * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE,
 237  * if the temperature is higher than COMP_INT or COMP_SHUT for
 238  * "debounce" times, TSADC controller will generate interrupt or TSHUT.
 239  */
 240 static void rk_tsadcv2_initialize(void __iomem *regs,
 241                                   enum tshut_polarity tshut_polarity)
 242 {
 243         if (tshut_polarity == TSHUT_HIGH_ACTIVE)
 244                 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH),
 245                                regs + TSADCV2_AUTO_CON);
 246         else
 247                 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW),
 248                                regs + TSADCV2_AUTO_CON);
 249
 250         writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
 251         writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
 252                        regs + TSADCV2_HIGHT_INT_DEBOUNCE);
 253         writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
 254                        regs + TSADCV2_AUTO_PERIOD_HT);
 255         writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
 256                        regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
 257 }
 258
 259 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 260 {
 261         u32 val;
 262
 263         val = readl_relaxed(regs + TSADCV2_INT_PD);
 264         writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD);
 265 }
 266
 267 static void rk_tsadcv2_control(void __iomem *regs, bool enable)
 268 {
 269         u32 val;
 270
 271         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 272         if (enable)
 273                 val |= TSADCV2_AUTO_EN;
 274         else
 275                 val &= ~TSADCV2_AUTO_EN;
 276
 277         writel_relaxed(val, regs + TSADCV2_AUTO_CON);
 278 }
 279
 280 static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp)
 281 {
 282         u32 val;
 283
 284         /* the A/D value of the channel last conversion need some time */
 285         val = readl_relaxed(regs + TSADCV2_DATA(chn));
 286         if (val == 0)
 287                 return -EAGAIN;
 288
 289         *temp = rk_tsadcv2_code_to_temp(val);
 290
 291         return 0;
 292 }
 293
 294 static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
 295 {
 296         u32 tshut_value, val;
 297
 298         tshut_value = rk_tsadcv2_temp_to_code(temp);
 299         writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
 300
 301         /* TSHUT will be valid */
 302         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 303         writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
 304 }
 305
 306 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
 307                                   enum tshut_mode mode)
 308 {
 309         u32 val;
 310
 311         val = readl_relaxed(regs + TSADCV2_INT_EN);
 312         if (mode == TSHUT_MODE_GPIO) {
 313                 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
 314                 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 315         } else {
 316                 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 317                 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
 318         }
 319
 320         writel_relaxed(val, regs + TSADCV2_INT_EN);
 321 }
 322
 323 static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
 324         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 325         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 326         .tshut_temp = 95000,
 327
 328         .initialize = rk_tsadcv2_initialize,
 329         .irq_ack = rk_tsadcv2_irq_ack,
 330         .control = rk_tsadcv2_control,
 331         .get_temp = rk_tsadcv2_get_temp,
 332         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 333         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 334 };
 335
 336 static const struct of_device_id of_rockchip_thermal_match[] = {
 337         {
 338                 .compatible = "rockchip,rk3288-tsadc",
 339                 .data = (void *)&rk3288_tsadc_data,
 340         },
 341         { /* end */ },
 342 };
 343 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
 344
 345 static void
 346 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
 347 {
 348         struct thermal_zone_device *tzd = sensor->tzd;
 349
 350         tzd->ops->set_mode(tzd,
 351                 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
 352 }
 353
 354 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
 355 {
 356         struct rockchip_thermal_data *thermal = dev;
 357         int i;
 358
 359         dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
 360
 361         thermal->chip->irq_ack(thermal->regs);
 362
 363         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 364                 thermal_zone_device_update(thermal->sensors[i].tzd);
 365
 366         return IRQ_HANDLED;
 367 }
 368
 369 static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
 370 {
 371         struct rockchip_thermal_sensor *sensor = _sensor;
 372         struct rockchip_thermal_data *thermal = sensor->thermal;
 373         const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
 374         int retval;
 375
 376         retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp);
 377         dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
 378                 sensor->id, *out_temp, retval);
 379
 380         return retval;
 381 }
 382
 383 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
 384         .get_temp = rockchip_thermal_get_temp,
 385 };
 386
 387 static int rockchip_configure_from_dt(struct device *dev,
 388                                       struct device_node *np,
 389                                       struct rockchip_thermal_data *thermal)
 390 {
 391         u32 shut_temp, tshut_mode, tshut_polarity;
 392
 393         if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
 394                 dev_warn(dev,
 395                          "Missing tshut temp property, using default %ld\n",
 396                          thermal->chip->tshut_temp);
 397                 thermal->tshut_temp = thermal->chip->tshut_temp;
 398         } else {
 399                 thermal->tshut_temp = shut_temp;
 400         }
 401
 402         if (thermal->tshut_temp > INT_MAX) {
 403                 dev_err(dev, "Invalid tshut temperature specified: %ld\n",
 404                         thermal->tshut_temp);
 405                 return -ERANGE;
 406         }
 407
 408         if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
 409                 dev_warn(dev,
 410                          "Missing tshut mode property, using default (%s)\n",
 411                          thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
 412                                 "gpio" : "cru");
 413                 thermal->tshut_mode = thermal->chip->tshut_mode;
 414         } else {
 415                 thermal->tshut_mode = tshut_mode;
 416         }
 417
 418         if (thermal->tshut_mode > 1) {
 419                 dev_err(dev, "Invalid tshut mode specified: %d\n",
 420                         thermal->tshut_mode);
 421                 return -EINVAL;
 422         }
 423
 424         if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
 425                                  &tshut_polarity)) {
 426                 dev_warn(dev,
 427                          "Missing tshut-polarity property, using default (%s)\n",
 428                          thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
 429                                 "low" : "high");
 430                 thermal->tshut_polarity = thermal->chip->tshut_polarity;
 431         } else {
 432                 thermal->tshut_polarity = tshut_polarity;
 433         }
 434
 435         if (thermal->tshut_polarity > 1) {
 436                 dev_err(dev, "Invalid tshut-polarity specified: %d\n",
 437                         thermal->tshut_polarity);
 438                 return -EINVAL;
 439         }
 440
 441         return 0;
 442 }
 443
 444 static int
 445 rockchip_thermal_register_sensor(struct platform_device *pdev,
 446                                  struct rockchip_thermal_data *thermal,
 447                                  struct rockchip_thermal_sensor *sensor,
 448                                  enum sensor_id id)
 449 {
 450         const struct rockchip_tsadc_chip *tsadc = thermal->chip;
 451         int error;
 452
 453         tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
 454         tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp);
 455
 456         sensor->thermal = thermal;
 457         sensor->id = id;
 458         sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
 459                                                       &rockchip_of_thermal_ops);
 460         if (IS_ERR(sensor->tzd)) {
 461                 error = PTR_ERR(sensor->tzd);
 462                 dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
 463                         id, error);
 464                 return error;
 465         }
 466
 467         return 0;
 468 }
 469
 470 /*
 471  * Reset TSADC Controller, reset all tsadc registers.
 472  */
 473 static void rockchip_thermal_reset_controller(struct reset_control *reset)
 474 {
 475         reset_control_assert(reset);
 476         usleep_range(10, 20);
 477         reset_control_deassert(reset);
 478 }
 479
 480 static int rockchip_thermal_probe(struct platform_device *pdev)
 481 {
 482         struct device_node *np = pdev->dev.of_node;
 483         struct rockchip_thermal_data *thermal;
 484         const struct of_device_id *match;
 485         struct resource *res;
 486         int irq;
 487         int i;
 488         int error;
 489
 490         match = of_match_node(of_rockchip_thermal_match, np);
 491         if (!match)
 492                 return -ENXIO;
 493
 494         irq = platform_get_irq(pdev, 0);
 495         if (irq < 0) {
 496                 dev_err(&pdev->dev, "no irq resource?\n");
 497                 return -EINVAL;
 498         }
 499
 500         thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
 501                                GFP_KERNEL);
 502         if (!thermal)
 503                 return -ENOMEM;
 504
 505         thermal->pdev = pdev;
 506
 507         thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
 508         if (!thermal->chip)
 509                 return -EINVAL;
 510
 511         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 512         thermal->regs = devm_ioremap_resource(&pdev->dev, res);
 513         if (IS_ERR(thermal->regs))
 514                 return PTR_ERR(thermal->regs);
 515
 516         thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
 517         if (IS_ERR(thermal->reset)) {
 518                 error = PTR_ERR(thermal->reset);
 519                 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
 520                 return error;
 521         }
 522
 523         thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
 524         if (IS_ERR(thermal->clk)) {
 525                 error = PTR_ERR(thermal->clk);
 526                 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
 527                 return error;
 528         }
 529
 530         thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
 531         if (IS_ERR(thermal->pclk)) {
 532                 error = PTR_ERR(thermal->pclk);
 533                 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
 534                         error);
 535                 return error;
 536         }
 537
 538         error = clk_prepare_enable(thermal->clk);
 539         if (error) {
 540                 dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
 541                         error);
 542                 return error;
 543         }
 544
 545         error = clk_prepare_enable(thermal->pclk);
 546         if (error) {
 547                 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
 548                 goto err_disable_clk;
 549         }
 550
 551         rockchip_thermal_reset_controller(thermal->reset);
 552
 553         error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
 554         if (error) {
 555                 dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
 556                         error);
 557                 goto err_disable_pclk;
 558         }
 559
 560         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 561
 562         error = rockchip_thermal_register_sensor(pdev, thermal,
 563                                                  &thermal->sensors[0],
 564                                                  SENSOR_CPU);
 565         if (error) {
 566                 dev_err(&pdev->dev,
 567                         "failed to register CPU thermal sensor: %d\n", error);
 568                 goto err_disable_pclk;
 569         }
 570
 571         error = rockchip_thermal_register_sensor(pdev, thermal,
 572                                                  &thermal->sensors[1],
 573                                                  SENSOR_GPU);
 574         if (error) {
 575                 dev_err(&pdev->dev,
 576                         "failed to register GPU thermal sensor: %d\n", error);
 577                 goto err_unregister_cpu_sensor;
 578         }
 579
 580         error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 581                                           &rockchip_thermal_alarm_irq_thread,
 582                                           IRQF_ONESHOT,
 583                                           "rockchip_thermal", thermal);
 584         if (error) {
 585                 dev_err(&pdev->dev,
 586                         "failed to request tsadc irq: %d\n", error);
 587                 goto err_unregister_gpu_sensor;
 588         }
 589
 590         thermal->chip->control(thermal->regs, true);
 591
 592         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 593                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 594
 595         platform_set_drvdata(pdev, thermal);
 596
 597         return 0;
 598
 599 err_unregister_gpu_sensor:
 600         thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd);
 601 err_unregister_cpu_sensor:
 602         thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd);
 603 err_disable_pclk:
 604         clk_disable_unprepare(thermal->pclk);
 605 err_disable_clk:
 606         clk_disable_unprepare(thermal->clk);
 607
 608         return error;
 609 }
 610
 611 static int rockchip_thermal_remove(struct platform_device *pdev)
 612 {
 613         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 614         int i;
 615
 616         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
 617                 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
 618
 619                 rockchip_thermal_toggle_sensor(sensor, false);
 620                 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
 621         }
 622
 623         thermal->chip->control(thermal->regs, false);
 624
 625         clk_disable_unprepare(thermal->pclk);
 626         clk_disable_unprepare(thermal->clk);
 627
 628         return 0;
 629 }
 630
 631 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 632 {
 633         struct platform_device *pdev = to_platform_device(dev);
 634         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 635         int i;
 636
 637         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 638                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
 639
 640         thermal->chip->control(thermal->regs, false);
 641
 642         clk_disable(thermal->pclk);
 643         clk_disable(thermal->clk);
 644
 645         return 0;
 646 }
 647
 648 static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 649 {
 650         struct platform_device *pdev = to_platform_device(dev);
 651         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 652         int i;
 653         int error;
 654
 655         error = clk_enable(thermal->clk);
 656         if (error)
 657                 return error;
 658
 659         error = clk_enable(thermal->pclk);
 660         if (error)
 661                 return error;
 662
 663         rockchip_thermal_reset_controller(thermal->reset);
 664
 665         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 666
 667         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
 668                 enum sensor_id id = thermal->sensors[i].id;
 669
 670                 thermal->chip->set_tshut_mode(id, thermal->regs,
 671                                               thermal->tshut_mode);
 672                 thermal->chip->set_tshut_temp(id, thermal->regs,
 673                                               thermal->tshut_temp);
 674         }
 675
 676         thermal->chip->control(thermal->regs, true);
 677
 678         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 679                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 680
 681         return 0;
 682 }
 683
 684 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
 685                          rockchip_thermal_suspend, rockchip_thermal_resume);
 686
 687 static struct platform_driver rockchip_thermal_driver = {
 688         .driver = {
 689                 .name = "rockchip-thermal",
 690                 .pm = &rockchip_thermal_pm_ops,
 691                 .of_match_table = of_rockchip_thermal_match,
 692         },
 693         .probe = rockchip_thermal_probe,
 694         .remove = rockchip_thermal_remove,
 695 };
 696
 697 module_platform_driver(rockchip_thermal_driver);
 698
 699 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
 700 MODULE_AUTHOR("Rockchip, Inc.");
 701 MODULE_LICENSE("GPL v2");
 702 MODULE_ALIAS("platform:rockchip-thermal");