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