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 three Temperature Sensors.  channel 0 is reserved,
  49  * channel 1 is for CPU, and channel 2 is for GPU.
  50  */
  51 enum sensor_id {
  52         SENSOR_CPU = 1,
  53         SENSOR_GPU,
  54 };
  55
  56 struct rockchip_tsadc_chip {
  57         /* The hardware-controlled tshut property */
  58         long tshut_temp;
  59         enum tshut_mode tshut_mode;
  60         enum tshut_polarity tshut_polarity;
  61
  62         /* Chip-wide methods */
  63         void (*initialize)(void __iomem *reg, enum tshut_polarity p);
  64         void (*irq_ack)(void __iomem *reg);
  65         void (*control)(void __iomem *reg, bool on);
  66
  67         /* Per-sensor methods */
  68         int (*get_temp)(int chn, void __iomem *reg, int *temp);
  69         void (*set_tshut_temp)(int chn, void __iomem *reg, long temp);
  70         void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
  71 };
  72
  73 struct rockchip_thermal_sensor {
  74         struct rockchip_thermal_data *thermal;
  75         struct thermal_zone_device *tzd;
  76         enum sensor_id id;
  77 };
  78
  79 #define NUM_SENSORS     2 /* Ignore unused sensor 0 */
  80
  81 struct rockchip_thermal_data {
  82         const struct rockchip_tsadc_chip *chip;
  83         struct platform_device *pdev;
  84         struct reset_control *reset;
  85
  86         struct rockchip_thermal_sensor sensors[NUM_SENSORS];
  87
  88         struct clk *clk;
  89         struct clk *pclk;
  90
  91         void __iomem *regs;
  92
  93         long tshut_temp;
  94         enum tshut_mode tshut_mode;
  95         enum tshut_polarity tshut_polarity;
  96 };
  97
  98 /* TSADC V2 Sensor info define: */
  99 #define TSADCV2_AUTO_CON                        0x04
 100 #define TSADCV2_INT_EN                          0x08
 101 #define TSADCV2_INT_PD                          0x0c
 102 #define TSADCV2_DATA(chn)                       (0x20 + (chn) * 0x04)
 103 #define TSADCV2_COMP_SHUT(chn)                  (0x40 + (chn) * 0x04)
 104 #define TSADCV2_HIGHT_INT_DEBOUNCE              0x60
 105 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE            0x64
 106 #define TSADCV2_AUTO_PERIOD                     0x68
 107 #define TSADCV2_AUTO_PERIOD_HT                  0x6c
 108
 109 #define TSADCV2_AUTO_EN                         BIT(0)
 110 #define TSADCV2_AUTO_SRC_EN(chn)                BIT(4 + (chn))
 111 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH        BIT(8)
 112
 113 #define TSADCV2_INT_SRC_EN(chn)                 BIT(chn)
 114 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn)          BIT(4 + (chn))
 115 #define TSADCV2_SHUT_2CRU_SRC_EN(chn)           BIT(8 + (chn))
 116
 117 #define TSADCV2_INT_PD_CLEAR_MASK               ~BIT(8)
 118
 119 #define TSADCV2_DATA_MASK                       0xfff
 120 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT        4
 121 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT      4
 122 #define TSADCV2_AUTO_PERIOD_TIME                250 /* msec */
 123 #define TSADCV2_AUTO_PERIOD_HT_TIME             50  /* msec */
 124
 125 struct tsadc_table {
 126         u32 code;
 127         long temp;
 128 };
 129
 130 static const struct tsadc_table v2_code_table[] = {
 131         {TSADCV2_DATA_MASK, -40000},
 132         {3800, -40000},
 133         {3792, -35000},
 134         {3783, -30000},
 135         {3774, -25000},
 136         {3765, -20000},
 137         {3756, -15000},
 138         {3747, -10000},
 139         {3737, -5000},
 140         {3728, 0},
 141         {3718, 5000},
 142         {3708, 10000},
 143         {3698, 15000},
 144         {3688, 20000},
 145         {3678, 25000},
 146         {3667, 30000},
 147         {3656, 35000},
 148         {3645, 40000},
 149         {3634, 45000},
 150         {3623, 50000},
 151         {3611, 55000},
 152         {3600, 60000},
 153         {3588, 65000},
 154         {3575, 70000},
 155         {3563, 75000},
 156         {3550, 80000},
 157         {3537, 85000},
 158         {3524, 90000},
 159         {3510, 95000},
 160         {3496, 100000},
 161         {3482, 105000},
 162         {3467, 110000},
 163         {3452, 115000},
 164         {3437, 120000},
 165         {3421, 125000},
 166 };
 167
 168 static u32 rk_tsadcv2_temp_to_code(long temp)
 169 {
 170         int high, low, mid;
 171
 172         low = 0;
 173         high = ARRAY_SIZE(v2_code_table) - 1;
 174         mid = (high + low) / 2;
 175
 176         if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp)
 177                 return 0;
 178
 179         while (low <= high) {
 180                 if (temp == v2_code_table[mid].temp)
 181                         return v2_code_table[mid].code;
 182                 else if (temp < v2_code_table[mid].temp)
 183                         high = mid - 1;
 184                 else
 185                         low = mid + 1;
 186                 mid = (low + high) / 2;
 187         }
 188
 189         return 0;
 190 }
 191
 192 static int rk_tsadcv2_code_to_temp(u32 code, int *temp)
 193 {
 194         unsigned int low = 1;
 195         unsigned int high = ARRAY_SIZE(v2_code_table) - 1;
 196         unsigned int mid = (low + high) / 2;
 197         unsigned int num;
 198         unsigned long denom;
 199
 200         BUILD_BUG_ON(ARRAY_SIZE(v2_code_table) < 2);
 201
 202         code &= TSADCV2_DATA_MASK;
 203         if (code < v2_code_table[high].code)
 204                 return -EAGAIN;         /* Incorrect reading */
 205
 206         while (low <= high) {
 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         *temp = v2_code_table[mid - 1].temp + (num / denom);
 227
 228         return 0;
 229 }
 230
 231 /**
 232  * rk_tsadcv2_initialize - initialize TASDC Controller
 233  * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between
 234  * every two accessing of TSADC in normal operation.
 235  * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between
 236  * every two accessing of TSADC after the temperature is higher
 237  * than COM_SHUT or COM_INT.
 238  * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE,
 239  * if the temperature is higher than COMP_INT or COMP_SHUT for
 240  * "debounce" times, TSADC controller will generate interrupt or TSHUT.
 241  */
 242 static void rk_tsadcv2_initialize(void __iomem *regs,
 243                                   enum tshut_polarity tshut_polarity)
 244 {
 245         if (tshut_polarity == TSHUT_HIGH_ACTIVE)
 246                 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 247                                regs + TSADCV2_AUTO_CON);
 248         else
 249                 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 250                                regs + TSADCV2_AUTO_CON);
 251
 252         writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
 253         writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
 254                        regs + TSADCV2_HIGHT_INT_DEBOUNCE);
 255         writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
 256                        regs + TSADCV2_AUTO_PERIOD_HT);
 257         writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
 258                        regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
 259 }
 260
 261 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 262 {
 263         u32 val;
 264
 265         val = readl_relaxed(regs + TSADCV2_INT_PD);
 266         writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
 267 }
 268
 269 static void rk_tsadcv2_control(void __iomem *regs, bool enable)
 270 {
 271         u32 val;
 272
 273         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 274         if (enable)
 275                 val |= TSADCV2_AUTO_EN;
 276         else
 277                 val &= ~TSADCV2_AUTO_EN;
 278
 279         writel_relaxed(val, regs + TSADCV2_AUTO_CON);
 280 }
 281
 282 static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp)
 283 {
 284         u32 val;
 285
 286         val = readl_relaxed(regs + TSADCV2_DATA(chn));
 287
 288         return rk_tsadcv2_code_to_temp(val, temp);
 289 }
 290
 291 static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp)
 292 {
 293         u32 tshut_value, val;
 294
 295         tshut_value = rk_tsadcv2_temp_to_code(temp);
 296         writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
 297
 298         /* TSHUT will be valid */
 299         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 300         writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
 301 }
 302
 303 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
 304                                   enum tshut_mode mode)
 305 {
 306         u32 val;
 307
 308         val = readl_relaxed(regs + TSADCV2_INT_EN);
 309         if (mode == TSHUT_MODE_GPIO) {
 310                 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
 311                 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 312         } else {
 313                 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 314                 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
 315         }
 316
 317         writel_relaxed(val, regs + TSADCV2_INT_EN);
 318 }
 319
 320 static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
 321         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 322         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 323         .tshut_temp = 95000,
 324
 325         .initialize = rk_tsadcv2_initialize,
 326         .irq_ack = rk_tsadcv2_irq_ack,
 327         .control = rk_tsadcv2_control,
 328         .get_temp = rk_tsadcv2_get_temp,
 329         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 330         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 331 };
 332
 333 static const struct of_device_id of_rockchip_thermal_match[] = {
 334         {
 335                 .compatible = "rockchip,rk3288-tsadc",
 336                 .data = (void *)&rk3288_tsadc_data,
 337         },
 338         { /* end */ },
 339 };
 340 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
 341
 342 static void
 343 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
 344 {
 345         struct thermal_zone_device *tzd = sensor->tzd;
 346
 347         tzd->ops->set_mode(tzd,
 348                 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
 349 }
 350
 351 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
 352 {
 353         struct rockchip_thermal_data *thermal = dev;
 354         int i;
 355
 356         dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
 357
 358         thermal->chip->irq_ack(thermal->regs);
 359
 360         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 361                 thermal_zone_device_update(thermal->sensors[i].tzd);
 362
 363         return IRQ_HANDLED;
 364 }
 365
 366 static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
 367 {
 368         struct rockchip_thermal_sensor *sensor = _sensor;
 369         struct rockchip_thermal_data *thermal = sensor->thermal;
 370         const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
 371         int retval;
 372
 373         retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp);
 374         dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
 375                 sensor->id, *out_temp, retval);
 376
 377         return retval;
 378 }
 379
 380 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
 381         .get_temp = rockchip_thermal_get_temp,
 382 };
 383
 384 static int rockchip_configure_from_dt(struct device *dev,
 385                                       struct device_node *np,
 386                                       struct rockchip_thermal_data *thermal)
 387 {
 388         u32 shut_temp, tshut_mode, tshut_polarity;
 389
 390         if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
 391                 dev_warn(dev,
 392                          "Missing tshut temp property, using default %ld\n",
 393                          thermal->chip->tshut_temp);
 394                 thermal->tshut_temp = thermal->chip->tshut_temp;
 395         } else {
 396                 thermal->tshut_temp = shut_temp;
 397         }
 398
 399         if (thermal->tshut_temp > INT_MAX) {
 400                 dev_err(dev, "Invalid tshut temperature specified: %ld\n",
 401                         thermal->tshut_temp);
 402                 return -ERANGE;
 403         }
 404
 405         if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
 406                 dev_warn(dev,
 407                          "Missing tshut mode property, using default (%s)\n",
 408                          thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
 409                                 "gpio" : "cru");
 410                 thermal->tshut_mode = thermal->chip->tshut_mode;
 411         } else {
 412                 thermal->tshut_mode = tshut_mode;
 413         }
 414
 415         if (thermal->tshut_mode > 1) {
 416                 dev_err(dev, "Invalid tshut mode specified: %d\n",
 417                         thermal->tshut_mode);
 418                 return -EINVAL;
 419         }
 420
 421         if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
 422                                  &tshut_polarity)) {
 423                 dev_warn(dev,
 424                          "Missing tshut-polarity property, using default (%s)\n",
 425                          thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
 426                                 "low" : "high");
 427                 thermal->tshut_polarity = thermal->chip->tshut_polarity;
 428         } else {
 429                 thermal->tshut_polarity = tshut_polarity;
 430         }
 431
 432         if (thermal->tshut_polarity > 1) {
 433                 dev_err(dev, "Invalid tshut-polarity specified: %d\n",
 434                         thermal->tshut_polarity);
 435                 return -EINVAL;
 436         }
 437
 438         return 0;
 439 }
 440
 441 static int
 442 rockchip_thermal_register_sensor(struct platform_device *pdev,
 443                                  struct rockchip_thermal_data *thermal,
 444                                  struct rockchip_thermal_sensor *sensor,
 445                                  enum sensor_id id)
 446 {
 447         const struct rockchip_tsadc_chip *tsadc = thermal->chip;
 448         int error;
 449
 450         tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
 451         tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp);
 452
 453         sensor->thermal = thermal;
 454         sensor->id = id;
 455         sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
 456                                                       &rockchip_of_thermal_ops);
 457         if (IS_ERR(sensor->tzd)) {
 458                 error = PTR_ERR(sensor->tzd);
 459                 dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
 460                         id, error);
 461                 return error;
 462         }
 463
 464         return 0;
 465 }
 466
 467 /*
 468  * Reset TSADC Controller, reset all tsadc registers.
 469  */
 470 static void rockchip_thermal_reset_controller(struct reset_control *reset)
 471 {
 472         reset_control_assert(reset);
 473         usleep_range(10, 20);
 474         reset_control_deassert(reset);
 475 }
 476
 477 static int rockchip_thermal_probe(struct platform_device *pdev)
 478 {
 479         struct device_node *np = pdev->dev.of_node;
 480         struct rockchip_thermal_data *thermal;
 481         const struct of_device_id *match;
 482         struct resource *res;
 483         int irq;
 484         int i;
 485         int error;
 486
 487         match = of_match_node(of_rockchip_thermal_match, np);
 488         if (!match)
 489                 return -ENXIO;
 490
 491         irq = platform_get_irq(pdev, 0);
 492         if (irq < 0) {
 493                 dev_err(&pdev->dev, "no irq resource?\n");
 494                 return -EINVAL;
 495         }
 496
 497         thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
 498                                GFP_KERNEL);
 499         if (!thermal)
 500                 return -ENOMEM;
 501
 502         thermal->pdev = pdev;
 503
 504         thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
 505         if (!thermal->chip)
 506                 return -EINVAL;
 507
 508         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 509         thermal->regs = devm_ioremap_resource(&pdev->dev, res);
 510         if (IS_ERR(thermal->regs))
 511                 return PTR_ERR(thermal->regs);
 512
 513         thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
 514         if (IS_ERR(thermal->reset)) {
 515                 error = PTR_ERR(thermal->reset);
 516                 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
 517                 return error;
 518         }
 519
 520         thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
 521         if (IS_ERR(thermal->clk)) {
 522                 error = PTR_ERR(thermal->clk);
 523                 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
 524                 return error;
 525         }
 526
 527         thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
 528         if (IS_ERR(thermal->pclk)) {
 529                 error = PTR_ERR(thermal->pclk);
 530                 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
 531                         error);
 532                 return error;
 533         }
 534
 535         error = clk_prepare_enable(thermal->clk);
 536         if (error) {
 537                 dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
 538                         error);
 539                 return error;
 540         }
 541
 542         error = clk_prepare_enable(thermal->pclk);
 543         if (error) {
 544                 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
 545                 goto err_disable_clk;
 546         }
 547
 548         rockchip_thermal_reset_controller(thermal->reset);
 549
 550         error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
 551         if (error) {
 552                 dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
 553                         error);
 554                 goto err_disable_pclk;
 555         }
 556
 557         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 558
 559         error = rockchip_thermal_register_sensor(pdev, thermal,
 560                                                  &thermal->sensors[0],
 561                                                  SENSOR_CPU);
 562         if (error) {
 563                 dev_err(&pdev->dev,
 564                         "failed to register CPU thermal sensor: %d\n", error);
 565                 goto err_disable_pclk;
 566         }
 567
 568         error = rockchip_thermal_register_sensor(pdev, thermal,
 569                                                  &thermal->sensors[1],
 570                                                  SENSOR_GPU);
 571         if (error) {
 572                 dev_err(&pdev->dev,
 573                         "failed to register GPU thermal sensor: %d\n", error);
 574                 goto err_unregister_cpu_sensor;
 575         }
 576
 577         error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 578                                           &rockchip_thermal_alarm_irq_thread,
 579                                           IRQF_ONESHOT,
 580                                           "rockchip_thermal", thermal);
 581         if (error) {
 582                 dev_err(&pdev->dev,
 583                         "failed to request tsadc irq: %d\n", error);
 584                 goto err_unregister_gpu_sensor;
 585         }
 586
 587         thermal->chip->control(thermal->regs, true);
 588
 589         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 590                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 591
 592         platform_set_drvdata(pdev, thermal);
 593
 594         return 0;
 595
 596 err_unregister_gpu_sensor:
 597         thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd);
 598 err_unregister_cpu_sensor:
 599         thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd);
 600 err_disable_pclk:
 601         clk_disable_unprepare(thermal->pclk);
 602 err_disable_clk:
 603         clk_disable_unprepare(thermal->clk);
 604
 605         return error;
 606 }
 607
 608 static int rockchip_thermal_remove(struct platform_device *pdev)
 609 {
 610         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 611         int i;
 612
 613         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
 614                 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
 615
 616                 rockchip_thermal_toggle_sensor(sensor, false);
 617                 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
 618         }
 619
 620         thermal->chip->control(thermal->regs, false);
 621
 622         clk_disable_unprepare(thermal->pclk);
 623         clk_disable_unprepare(thermal->clk);
 624
 625         return 0;
 626 }
 627
 628 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 629 {
 630         struct platform_device *pdev = to_platform_device(dev);
 631         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 632         int i;
 633
 634         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 635                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
 636
 637         thermal->chip->control(thermal->regs, false);
 638
 639         clk_disable(thermal->pclk);
 640         clk_disable(thermal->clk);
 641
 642         pinctrl_pm_select_sleep_state(dev);
 643
 644         return 0;
 645 }
 646
 647 static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 648 {
 649         struct platform_device *pdev = to_platform_device(dev);
 650         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 651         int i;
 652         int error;
 653
 654         error = clk_enable(thermal->clk);
 655         if (error)
 656                 return error;
 657
 658         error = clk_enable(thermal->pclk);
 659         if (error)
 660                 return error;
 661
 662         rockchip_thermal_reset_controller(thermal->reset);
 663
 664         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 665
 666         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) {
 667                 enum sensor_id id = thermal->sensors[i].id;
 668
 669                 thermal->chip->set_tshut_mode(id, thermal->regs,
 670                                               thermal->tshut_mode);
 671                 thermal->chip->set_tshut_temp(id, thermal->regs,
 672                                               thermal->tshut_temp);
 673         }
 674
 675         thermal->chip->control(thermal->regs, true);
 676
 677         for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++)
 678                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 679
 680         pinctrl_pm_select_default_state(dev);
 681
 682         return 0;
 683 }
 684
 685 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
 686                          rockchip_thermal_suspend, rockchip_thermal_resume);
 687
 688 static struct platform_driver rockchip_thermal_driver = {
 689         .driver = {
 690                 .name = "rockchip-thermal",
 691                 .pm = &rockchip_thermal_pm_ops,
 692                 .of_match_table = of_rockchip_thermal_match,
 693         },
 694         .probe = rockchip_thermal_probe,
 695         .remove = rockchip_thermal_remove,
 696 };
 697
 698 module_platform_driver(rockchip_thermal_driver);
 699
 700 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
 701 MODULE_AUTHOR("Rockchip, Inc.");
 702 MODULE_LICENSE("GPL v2");
 703 MODULE_ALIAS("platform:rockchip-thermal");