drivers/thermal/samsung/exynos_tmu.c

   1 /*
   2  * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
   3  *
   4  *  Copyright (C) 2011 Samsung Electronics
   5  *  Donggeun Kim <dg77.kim@samsung.com>
   6  *  Amit Daniel Kachhap <amit.kachhap@linaro.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <linux/clk.h>
  25 #include <linux/io.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/module.h>
  28 #include <linux/of.h>
  29 #include <linux/of_address.h>
  30 #include <linux/of_irq.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/regulator/consumer.h>
  33
  34 #include "exynos_thermal_common.h"
  35 #include "exynos_tmu.h"
  36 #include "exynos_tmu_data.h"
  37
  38 /**
  39  * struct exynos_tmu_data : A structure to hold the private data of the TMU
  40         driver
  41  * @id: identifier of the one instance of the TMU controller.
  42  * @pdata: pointer to the tmu platform/configuration data
  43  * @base: base address of the single instance of the TMU controller.
  44  * @base_second: base address of the common registers of the TMU controller.
  45  * @irq: irq number of the TMU controller.
  46  * @soc: id of the SOC type.
  47  * @irq_work: pointer to the irq work structure.
  48  * @lock: lock to implement synchronization.
  49  * @clk: pointer to the clock structure.
  50  * @clk_sec: pointer to the clock structure for accessing the base_second.
  51  * @temp_error1: fused value of the first point trim.
  52  * @temp_error2: fused value of the second point trim.
  53  * @regulator: pointer to the TMU regulator structure.
  54  * @reg_conf: pointer to structure to register with core thermal.
  55  */
  56 struct exynos_tmu_data {
  57         int id;
  58         struct exynos_tmu_platform_data *pdata;
  59         void __iomem *base;
  60         void __iomem *base_second;
  61         int irq;
  62         enum soc_type soc;
  63         struct work_struct irq_work;
  64         struct mutex lock;
  65         struct clk *clk, *clk_sec;
  66         u8 temp_error1, temp_error2;
  67         struct regulator *regulator;
  68         struct thermal_sensor_conf *reg_conf;
  69 };
  70
  71 /*
  72  * TMU treats temperature as a mapped temperature code.
  73  * The temperature is converted differently depending on the calibration type.
  74  */
  75 static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
  76 {
  77         struct exynos_tmu_platform_data *pdata = data->pdata;
  78         int temp_code;
  79
  80         switch (pdata->cal_type) {
  81         case TYPE_TWO_POINT_TRIMMING:
  82                 temp_code = (temp - pdata->first_point_trim) *
  83                         (data->temp_error2 - data->temp_error1) /
  84                         (pdata->second_point_trim - pdata->first_point_trim) +
  85                         data->temp_error1;
  86                 break;
  87         case TYPE_ONE_POINT_TRIMMING:
  88                 temp_code = temp + data->temp_error1 - pdata->first_point_trim;
  89                 break;
  90         default:
  91                 temp_code = temp + pdata->default_temp_offset;
  92                 break;
  93         }
  94
  95         return temp_code;
  96 }
  97
  98 /*
  99  * Calculate a temperature value from a temperature code.
 100  * The unit of the temperature is degree Celsius.
 101  */
 102 static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
 103 {
 104         struct exynos_tmu_platform_data *pdata = data->pdata;
 105         int temp;
 106
 107         switch (pdata->cal_type) {
 108         case TYPE_TWO_POINT_TRIMMING:
 109                 temp = (temp_code - data->temp_error1) *
 110                         (pdata->second_point_trim - pdata->first_point_trim) /
 111                         (data->temp_error2 - data->temp_error1) +
 112                         pdata->first_point_trim;
 113                 break;
 114         case TYPE_ONE_POINT_TRIMMING:
 115                 temp = temp_code - data->temp_error1 + pdata->first_point_trim;
 116                 break;
 117         default:
 118                 temp = temp_code - pdata->default_temp_offset;
 119                 break;
 120         }
 121
 122         return temp;
 123 }
 124
 125 static int exynos_tmu_initialize(struct platform_device *pdev)
 126 {
 127         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 128         struct exynos_tmu_platform_data *pdata = data->pdata;
 129         const struct exynos_tmu_registers *reg = pdata->registers;
 130         unsigned int status, trim_info = 0, con;
 131         unsigned int rising_threshold = 0, falling_threshold = 0;
 132         int ret = 0, threshold_code, i;
 133
 134         mutex_lock(&data->lock);
 135         clk_enable(data->clk);
 136         if (!IS_ERR(data->clk_sec))
 137                 clk_enable(data->clk_sec);
 138
 139         if (TMU_SUPPORTS(pdata, READY_STATUS)) {
 140                 status = readb(data->base + reg->tmu_status);
 141                 if (!status) {
 142                         ret = -EBUSY;
 143                         goto out;
 144                 }
 145         }
 146
 147         if (TMU_SUPPORTS(pdata, TRIM_RELOAD))
 148                 __raw_writel(1, data->base + reg->triminfo_ctrl);
 149
 150         /* Save trimming info in order to perform calibration */
 151         if (data->soc == SOC_ARCH_EXYNOS5440) {
 152                 /*
 153                  * For exynos5440 soc triminfo value is swapped between TMU0 and
 154                  * TMU2, so the below logic is needed.
 155                  */
 156                 switch (data->id) {
 157                 case 0:
 158                         trim_info = readl(data->base +
 159                         EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
 160                         break;
 161                 case 1:
 162                         trim_info = readl(data->base + reg->triminfo_data);
 163                         break;
 164                 case 2:
 165                         trim_info = readl(data->base -
 166                         EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
 167                 }
 168         } else {
 169                 /* On exynos5420 the triminfo register is in the shared space */
 170                 if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO)
 171                         trim_info = readl(data->base_second +
 172                                                         reg->triminfo_data);
 173                 else
 174                         trim_info = readl(data->base + reg->triminfo_data);
 175         }
 176         data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
 177         data->temp_error2 = ((trim_info >> reg->triminfo_85_shift) &
 178                                 EXYNOS_TMU_TEMP_MASK);
 179
 180         if (!data->temp_error1 ||
 181                 (pdata->min_efuse_value > data->temp_error1) ||
 182                 (data->temp_error1 > pdata->max_efuse_value))
 183                 data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;
 184
 185         if (!data->temp_error2)
 186                 data->temp_error2 =
 187                         (pdata->efuse_value >> reg->triminfo_85_shift) &
 188                         EXYNOS_TMU_TEMP_MASK;
 189
 190         rising_threshold = readl(data->base + reg->threshold_th0);
 191
 192         if (data->soc == SOC_ARCH_EXYNOS4210) {
 193                 /* Write temperature code for threshold */
 194                 threshold_code = temp_to_code(data, pdata->threshold);
 195                 writeb(threshold_code,
 196                         data->base + reg->threshold_temp);
 197                 for (i = 0; i < pdata->non_hw_trigger_levels; i++)
 198                         writeb(pdata->trigger_levels[i], data->base +
 199                         reg->threshold_th0 + i * sizeof(reg->threshold_th0));
 200
 201                 writel(reg->intclr_rise_mask, data->base + reg->tmu_intclear);
 202         } else {
 203                 /* Write temperature code for rising and falling threshold */
 204                 for (i = 0; i < pdata->non_hw_trigger_levels; i++) {
 205                         threshold_code = temp_to_code(data,
 206                                                 pdata->trigger_levels[i]);
 207                         rising_threshold &= ~(0xff << 8 * i);
 208                         rising_threshold |= threshold_code << 8 * i;
 209                         if (pdata->threshold_falling) {
 210                                 threshold_code = temp_to_code(data,
 211                                                 pdata->trigger_levels[i] -
 212                                                 pdata->threshold_falling);
 213                                 falling_threshold |= threshold_code << 8 * i;
 214                         }
 215                 }
 216
 217                 writel(rising_threshold,
 218                                 data->base + reg->threshold_th0);
 219                 writel(falling_threshold,
 220                                 data->base + reg->threshold_th1);
 221
 222                 writel((reg->intclr_rise_mask << reg->intclr_rise_shift) |
 223                         (reg->intclr_fall_mask << reg->intclr_fall_shift),
 224                                 data->base + reg->tmu_intclear);
 225
 226                 /* if last threshold limit is also present */
 227                 i = pdata->max_trigger_level - 1;
 228                 if (pdata->trigger_levels[i] &&
 229                                 (pdata->trigger_type[i] == HW_TRIP)) {
 230                         threshold_code = temp_to_code(data,
 231                                                 pdata->trigger_levels[i]);
 232                         if (i == EXYNOS_MAX_TRIGGER_PER_REG - 1) {
 233                                 /* 1-4 level to be assigned in th0 reg */
 234                                 rising_threshold &= ~(0xff << 8 * i);
 235                                 rising_threshold |= threshold_code << 8 * i;
 236                                 writel(rising_threshold,
 237                                         data->base + reg->threshold_th0);
 238                         } else if (i == EXYNOS_MAX_TRIGGER_PER_REG) {
 239                                 /* 5th level to be assigned in th2 reg */
 240                                 rising_threshold =
 241                                 threshold_code << reg->threshold_th3_l0_shift;
 242                                 writel(rising_threshold,
 243                                         data->base + reg->threshold_th2);
 244                         }
 245                         con = readl(data->base + reg->tmu_ctrl);
 246                         con |= (1 << reg->therm_trip_en_shift);
 247                         writel(con, data->base + reg->tmu_ctrl);
 248                 }
 249         }
 250         /*Clear the PMIN in the common TMU register*/
 251         if (reg->tmu_pmin && !data->id)
 252                 writel(0, data->base_second + reg->tmu_pmin);
 253 out:
 254         clk_disable(data->clk);
 255         mutex_unlock(&data->lock);
 256         if (!IS_ERR(data->clk_sec))
 257                 clk_disable(data->clk_sec);
 258
 259         return ret;
 260 }
 261
 262 static void exynos_tmu_control(struct platform_device *pdev, bool on)
 263 {
 264         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 265         struct exynos_tmu_platform_data *pdata = data->pdata;
 266         const struct exynos_tmu_registers *reg = pdata->registers;
 267         unsigned int con, interrupt_en;
 268
 269         mutex_lock(&data->lock);
 270         clk_enable(data->clk);
 271
 272         con = readl(data->base + reg->tmu_ctrl);
 273
 274         if (pdata->test_mux)
 275                 con |= (pdata->test_mux << reg->test_mux_addr_shift);
 276
 277         if (pdata->reference_voltage) {
 278                 con &= ~(reg->buf_vref_sel_mask << reg->buf_vref_sel_shift);
 279                 con |= pdata->reference_voltage << reg->buf_vref_sel_shift;
 280         }
 281
 282         if (pdata->gain) {
 283                 con &= ~(reg->buf_slope_sel_mask << reg->buf_slope_sel_shift);
 284                 con |= (pdata->gain << reg->buf_slope_sel_shift);
 285         }
 286
 287         if (pdata->noise_cancel_mode) {
 288                 con &= ~(reg->therm_trip_mode_mask <<
 289                                         reg->therm_trip_mode_shift);
 290                 con |= (pdata->noise_cancel_mode << reg->therm_trip_mode_shift);
 291         }
 292
 293         if (on) {
 294                 con |= (1 << reg->core_en_shift);
 295                 interrupt_en =
 296                         pdata->trigger_enable[3] << reg->inten_rise3_shift |
 297                         pdata->trigger_enable[2] << reg->inten_rise2_shift |
 298                         pdata->trigger_enable[1] << reg->inten_rise1_shift |
 299                         pdata->trigger_enable[0] << reg->inten_rise0_shift;
 300                 if (TMU_SUPPORTS(pdata, FALLING_TRIP))
 301                         interrupt_en |=
 302                                 interrupt_en << reg->inten_fall0_shift;
 303         } else {
 304                 con &= ~(1 << reg->core_en_shift);
 305                 interrupt_en = 0; /* Disable all interrupts */
 306         }
 307         writel(interrupt_en, data->base + reg->tmu_inten);
 308         writel(con, data->base + reg->tmu_ctrl);
 309
 310         clk_disable(data->clk);
 311         mutex_unlock(&data->lock);
 312 }
 313
 314 static int exynos_tmu_read(struct exynos_tmu_data *data)
 315 {
 316         struct exynos_tmu_platform_data *pdata = data->pdata;
 317         const struct exynos_tmu_registers *reg = pdata->registers;
 318         u8 temp_code;
 319         int temp;
 320
 321         mutex_lock(&data->lock);
 322         clk_enable(data->clk);
 323
 324         temp_code = readb(data->base + reg->tmu_cur_temp);
 325
 326         if (data->soc == SOC_ARCH_EXYNOS4210)
 327                 /* temp_code should range between 75 and 175 */
 328                 if (temp_code < 75 || temp_code > 175) {
 329                         temp = -ENODATA;
 330                         goto out;
 331                 }
 332
 333         temp = code_to_temp(data, temp_code);
 334 out:
 335         clk_disable(data->clk);
 336         mutex_unlock(&data->lock);
 337
 338         return temp;
 339 }
 340
 341 #ifdef CONFIG_THERMAL_EMULATION
 342 static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
 343 {
 344         struct exynos_tmu_data *data = drv_data;
 345         struct exynos_tmu_platform_data *pdata = data->pdata;
 346         const struct exynos_tmu_registers *reg = pdata->registers;
 347         unsigned int val;
 348         int ret = -EINVAL;
 349
 350         if (!TMU_SUPPORTS(pdata, EMULATION))
 351                 goto out;
 352
 353         if (temp && temp < MCELSIUS)
 354                 goto out;
 355
 356         mutex_lock(&data->lock);
 357         clk_enable(data->clk);
 358
 359         val = readl(data->base + reg->emul_con);
 360
 361         if (temp) {
 362                 temp /= MCELSIUS;
 363
 364                 if (TMU_SUPPORTS(pdata, EMUL_TIME)) {
 365                         val &= ~(EXYNOS_EMUL_TIME_MASK << reg->emul_time_shift);
 366                         val |= (EXYNOS_EMUL_TIME << reg->emul_time_shift);
 367                 }
 368                 val &= ~(EXYNOS_EMUL_DATA_MASK << reg->emul_temp_shift);
 369                 val |= (temp_to_code(data, temp) << reg->emul_temp_shift) |
 370                         EXYNOS_EMUL_ENABLE;
 371         } else {
 372                 val &= ~EXYNOS_EMUL_ENABLE;
 373         }
 374
 375         writel(val, data->base + reg->emul_con);
 376
 377         clk_disable(data->clk);
 378         mutex_unlock(&data->lock);
 379         return 0;
 380 out:
 381         return ret;
 382 }
 383 #else
 384 static int exynos_tmu_set_emulation(void *drv_data,     unsigned long temp)
 385         { return -EINVAL; }
 386 #endif/*CONFIG_THERMAL_EMULATION*/
 387
 388 static void exynos_tmu_work(struct work_struct *work)
 389 {
 390         struct exynos_tmu_data *data = container_of(work,
 391                         struct exynos_tmu_data, irq_work);
 392         struct exynos_tmu_platform_data *pdata = data->pdata;
 393         const struct exynos_tmu_registers *reg = pdata->registers;
 394         unsigned int val_irq, val_type;
 395
 396         if (!IS_ERR(data->clk_sec))
 397                 clk_enable(data->clk_sec);
 398         /* Find which sensor generated this interrupt */
 399         if (reg->tmu_irqstatus) {
 400                 val_type = readl(data->base_second + reg->tmu_irqstatus);
 401                 if (!((val_type >> data->id) & 0x1))
 402                         goto out;
 403         }
 404         if (!IS_ERR(data->clk_sec))
 405                 clk_disable(data->clk_sec);
 406
 407         exynos_report_trigger(data->reg_conf);
 408         mutex_lock(&data->lock);
 409         clk_enable(data->clk);
 410
 411         /* TODO: take action based on particular interrupt */
 412         val_irq = readl(data->base + reg->tmu_intstat);
 413         /* clear the interrupts */
 414         writel(val_irq, data->base + reg->tmu_intclear);
 415
 416         clk_disable(data->clk);
 417         mutex_unlock(&data->lock);
 418 out:
 419         enable_irq(data->irq);
 420 }
 421
 422 static irqreturn_t exynos_tmu_irq(int irq, void *id)
 423 {
 424         struct exynos_tmu_data *data = id;
 425
 426         disable_irq_nosync(irq);
 427         schedule_work(&data->irq_work);
 428
 429         return IRQ_HANDLED;
 430 }
 431
 432 static const struct of_device_id exynos_tmu_match[] = {
 433         {
 434                 .compatible = "samsung,exynos3250-tmu",
 435                 .data = (void *)EXYNOS3250_TMU_DRV_DATA,
 436         },
 437         {
 438                 .compatible = "samsung,exynos4210-tmu",
 439                 .data = (void *)EXYNOS4210_TMU_DRV_DATA,
 440         },
 441         {
 442                 .compatible = "samsung,exynos4412-tmu",
 443                 .data = (void *)EXYNOS4412_TMU_DRV_DATA,
 444         },
 445         {
 446                 .compatible = "samsung,exynos5250-tmu",
 447                 .data = (void *)EXYNOS5250_TMU_DRV_DATA,
 448         },
 449         {
 450                 .compatible = "samsung,exynos5260-tmu",
 451                 .data = (void *)EXYNOS5260_TMU_DRV_DATA,
 452         },
 453         {
 454                 .compatible = "samsung,exynos5420-tmu",
 455                 .data = (void *)EXYNOS5420_TMU_DRV_DATA,
 456         },
 457         {
 458                 .compatible = "samsung,exynos5420-tmu-ext-triminfo",
 459                 .data = (void *)EXYNOS5420_TMU_DRV_DATA,
 460         },
 461         {
 462                 .compatible = "samsung,exynos5440-tmu",
 463                 .data = (void *)EXYNOS5440_TMU_DRV_DATA,
 464         },
 465         {},
 466 };
 467 MODULE_DEVICE_TABLE(of, exynos_tmu_match);
 468
 469 static inline struct  exynos_tmu_platform_data *exynos_get_driver_data(
 470                         struct platform_device *pdev, int id)
 471 {
 472         struct  exynos_tmu_init_data *data_table;
 473         struct exynos_tmu_platform_data *tmu_data;
 474         const struct of_device_id *match;
 475
 476         match = of_match_node(exynos_tmu_match, pdev->dev.of_node);
 477         if (!match)
 478                 return NULL;
 479         data_table = (struct exynos_tmu_init_data *) match->data;
 480         if (!data_table || id >= data_table->tmu_count)
 481                 return NULL;
 482         tmu_data = data_table->tmu_data;
 483         return (struct exynos_tmu_platform_data *) (tmu_data + id);
 484 }
 485
 486 static int exynos_map_dt_data(struct platform_device *pdev)
 487 {
 488         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 489         struct exynos_tmu_platform_data *pdata;
 490         struct resource res;
 491         int ret;
 492
 493         if (!data || !pdev->dev.of_node)
 494                 return -ENODEV;
 495
 496         /*
 497          * Try enabling the regulator if found
 498          * TODO: Add regulator as an SOC feature, so that regulator enable
 499          * is a compulsory call.
 500          */
 501         data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
 502         if (!IS_ERR(data->regulator)) {
 503                 ret = regulator_enable(data->regulator);
 504                 if (ret) {
 505                         dev_err(&pdev->dev, "failed to enable vtmu\n");
 506                         return ret;
 507                 }
 508         } else {
 509                 dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
 510         }
 511
 512         data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
 513         if (data->id < 0)
 514                 data->id = 0;
 515
 516         data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 517         if (data->irq <= 0) {
 518                 dev_err(&pdev->dev, "failed to get IRQ\n");
 519                 return -ENODEV;
 520         }
 521
 522         if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
 523                 dev_err(&pdev->dev, "failed to get Resource 0\n");
 524                 return -ENODEV;
 525         }
 526
 527         data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
 528         if (!data->base) {
 529                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
 530                 return -EADDRNOTAVAIL;
 531         }
 532
 533         pdata = exynos_get_driver_data(pdev, data->id);
 534         if (!pdata) {
 535                 dev_err(&pdev->dev, "No platform init data supplied.\n");
 536                 return -ENODEV;
 537         }
 538         data->pdata = pdata;
 539         /*
 540          * Check if the TMU shares some registers and then try to map the
 541          * memory of common registers.
 542          */
 543         if (!TMU_SUPPORTS(pdata, ADDRESS_MULTIPLE))
 544                 return 0;
 545
 546         if (of_address_to_resource(pdev->dev.of_node, 1, &res)) {
 547                 dev_err(&pdev->dev, "failed to get Resource 1\n");
 548                 return -ENODEV;
 549         }
 550
 551         data->base_second = devm_ioremap(&pdev->dev, res.start,
 552                                         resource_size(&res));
 553         if (!data->base_second) {
 554                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
 555                 return -ENOMEM;
 556         }
 557
 558         return 0;
 559 }
 560
 561 static int exynos_tmu_probe(struct platform_device *pdev)
 562 {
 563         struct exynos_tmu_data *data;
 564         struct exynos_tmu_platform_data *pdata;
 565         struct thermal_sensor_conf *sensor_conf;
 566         int ret, i;
 567
 568         data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
 569                                         GFP_KERNEL);
 570         if (!data)
 571                 return -ENOMEM;
 572
 573         platform_set_drvdata(pdev, data);
 574         mutex_init(&data->lock);
 575
 576         ret = exynos_map_dt_data(pdev);
 577         if (ret)
 578                 return ret;
 579
 580         pdata = data->pdata;
 581
 582         INIT_WORK(&data->irq_work, exynos_tmu_work);
 583
 584         data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
 585         if (IS_ERR(data->clk)) {
 586                 dev_err(&pdev->dev, "Failed to get clock\n");
 587                 return  PTR_ERR(data->clk);
 588         }
 589
 590         data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif");
 591         if (IS_ERR(data->clk_sec)) {
 592                 if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
 593                         dev_err(&pdev->dev, "Failed to get triminfo clock\n");
 594                         return PTR_ERR(data->clk_sec);
 595                 }
 596         } else {
 597                 ret = clk_prepare(data->clk_sec);
 598                 if (ret) {
 599                         dev_err(&pdev->dev, "Failed to get clock\n");
 600                         return ret;
 601                 }
 602         }
 603
 604         ret = clk_prepare(data->clk);
 605         if (ret) {
 606                 dev_err(&pdev->dev, "Failed to get clock\n");
 607                 goto err_clk_sec;
 608         }
 609
 610         if (pdata->type == SOC_ARCH_EXYNOS3250 ||
 611             pdata->type == SOC_ARCH_EXYNOS4210 ||
 612             pdata->type == SOC_ARCH_EXYNOS4412 ||
 613             pdata->type == SOC_ARCH_EXYNOS5250 ||
 614             pdata->type == SOC_ARCH_EXYNOS5260 ||
 615             pdata->type == SOC_ARCH_EXYNOS5420_TRIMINFO ||
 616             pdata->type == SOC_ARCH_EXYNOS5440)
 617                 data->soc = pdata->type;
 618         else {
 619                 ret = -EINVAL;
 620                 dev_err(&pdev->dev, "Platform not supported\n");
 621                 goto err_clk;
 622         }
 623
 624         ret = exynos_tmu_initialize(pdev);
 625         if (ret) {
 626                 dev_err(&pdev->dev, "Failed to initialize TMU\n");
 627                 goto err_clk;
 628         }
 629
 630         exynos_tmu_control(pdev, true);
 631
 632         /* Allocate a structure to register with the exynos core thermal */
 633         sensor_conf = devm_kzalloc(&pdev->dev,
 634                                 sizeof(struct thermal_sensor_conf), GFP_KERNEL);
 635         if (!sensor_conf) {
 636                 ret = -ENOMEM;
 637                 goto err_clk;
 638         }
 639         sprintf(sensor_conf->name, "therm_zone%d", data->id);
 640         sensor_conf->read_temperature = (int (*)(void *))exynos_tmu_read;
 641         sensor_conf->write_emul_temp =
 642                 (int (*)(void *, unsigned long))exynos_tmu_set_emulation;
 643         sensor_conf->driver_data = data;
 644         sensor_conf->trip_data.trip_count = pdata->trigger_enable[0] +
 645                         pdata->trigger_enable[1] + pdata->trigger_enable[2]+
 646                         pdata->trigger_enable[3];
 647
 648         for (i = 0; i < sensor_conf->trip_data.trip_count; i++) {
 649                 sensor_conf->trip_data.trip_val[i] =
 650                         pdata->threshold + pdata->trigger_levels[i];
 651                 sensor_conf->trip_data.trip_type[i] =
 652                                         pdata->trigger_type[i];
 653         }
 654
 655         sensor_conf->trip_data.trigger_falling = pdata->threshold_falling;
 656
 657         sensor_conf->cooling_data.freq_clip_count = pdata->freq_tab_count;
 658         for (i = 0; i < pdata->freq_tab_count; i++) {
 659                 sensor_conf->cooling_data.freq_data[i].freq_clip_max =
 660                                         pdata->freq_tab[i].freq_clip_max;
 661                 sensor_conf->cooling_data.freq_data[i].temp_level =
 662                                         pdata->freq_tab[i].temp_level;
 663         }
 664         sensor_conf->dev = &pdev->dev;
 665         /* Register the sensor with thermal management interface */
 666         ret = exynos_register_thermal(sensor_conf);
 667         if (ret) {
 668                 dev_err(&pdev->dev, "Failed to register thermal interface\n");
 669                 goto err_clk;
 670         }
 671         data->reg_conf = sensor_conf;
 672
 673         ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
 674                 IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
 675         if (ret) {
 676                 dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
 677                 goto err_clk;
 678         }
 679
 680         return 0;
 681 err_clk:
 682         clk_unprepare(data->clk);
 683 err_clk_sec:
 684         if (!IS_ERR(data->clk_sec))
 685                 clk_unprepare(data->clk_sec);
 686         return ret;
 687 }
 688
 689 static int exynos_tmu_remove(struct platform_device *pdev)
 690 {
 691         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 692
 693         exynos_unregister_thermal(data->reg_conf);
 694
 695         exynos_tmu_control(pdev, false);
 696
 697         clk_unprepare(data->clk);
 698         if (!IS_ERR(data->clk_sec))
 699                 clk_unprepare(data->clk_sec);
 700
 701         if (!IS_ERR(data->regulator))
 702                 regulator_disable(data->regulator);
 703
 704         return 0;
 705 }
 706
 707 #ifdef CONFIG_PM_SLEEP
 708 static int exynos_tmu_suspend(struct device *dev)
 709 {
 710         exynos_tmu_control(to_platform_device(dev), false);
 711
 712         return 0;
 713 }
 714
 715 static int exynos_tmu_resume(struct device *dev)
 716 {
 717         struct platform_device *pdev = to_platform_device(dev);
 718
 719         exynos_tmu_initialize(pdev);
 720         exynos_tmu_control(pdev, true);
 721
 722         return 0;
 723 }
 724
 725 static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
 726                          exynos_tmu_suspend, exynos_tmu_resume);
 727 #define EXYNOS_TMU_PM   (&exynos_tmu_pm)
 728 #else
 729 #define EXYNOS_TMU_PM   NULL
 730 #endif
 731
 732 static struct platform_driver exynos_tmu_driver = {
 733         .driver = {
 734                 .name   = "exynos-tmu",
 735                 .owner  = THIS_MODULE,
 736                 .pm     = EXYNOS_TMU_PM,
 737                 .of_match_table = exynos_tmu_match,
 738         },
 739         .probe = exynos_tmu_probe,
 740         .remove = exynos_tmu_remove,
 741 };
 742
 743 module_platform_driver(exynos_tmu_driver);
 744
 745 MODULE_DESCRIPTION("EXYNOS TMU Driver");
 746 MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
 747 MODULE_LICENSE("GPL");
 748 MODULE_ALIAS("platform:exynos-tmu");