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_common: 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  * @temp_error1: fused value of the first point trim.
  51  * @temp_error2: fused value of the second point trim.
  52  * @regulator: pointer to the TMU regulator structure.
  53  * @reg_conf: pointer to structure to register with core thermal.
  54  */
  55 struct exynos_tmu_data {
  56         int id;
  57         struct exynos_tmu_platform_data *pdata;
  58         void __iomem *base;
  59         void __iomem *base_common;
  60         int irq;
  61         enum soc_type soc;
  62         struct work_struct irq_work;
  63         struct mutex lock;
  64         struct clk *clk;
  65         u8 temp_error1, temp_error2;
  66         struct regulator *regulator;
  67         struct thermal_sensor_conf *reg_conf;
  68 };
  69
  70 /*
  71  * TMU treats temperature as a mapped temperature code.
  72  * The temperature is converted differently depending on the calibration type.
  73  */
  74 static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
  75 {
  76         struct exynos_tmu_platform_data *pdata = data->pdata;
  77         int temp_code;
  78
  79         if (pdata->cal_mode == HW_MODE)
  80                 return temp;
  81
  82         if (data->soc == SOC_ARCH_EXYNOS4210)
  83                 /* temp should range between 25 and 125 */
  84                 if (temp < 25 || temp > 125) {
  85                         temp_code = -EINVAL;
  86                         goto out;
  87                 }
  88
  89         switch (pdata->cal_type) {
  90         case TYPE_TWO_POINT_TRIMMING:
  91                 temp_code = (temp - pdata->first_point_trim) *
  92                         (data->temp_error2 - data->temp_error1) /
  93                         (pdata->second_point_trim - pdata->first_point_trim) +
  94                         data->temp_error1;
  95                 break;
  96         case TYPE_ONE_POINT_TRIMMING:
  97                 temp_code = temp + data->temp_error1 - pdata->first_point_trim;
  98                 break;
  99         default:
 100                 temp_code = temp + pdata->default_temp_offset;
 101                 break;
 102         }
 103 out:
 104         return temp_code;
 105 }
 106
 107 /*
 108  * Calculate a temperature value from a temperature code.
 109  * The unit of the temperature is degree Celsius.
 110  */
 111 static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
 112 {
 113         struct exynos_tmu_platform_data *pdata = data->pdata;
 114         int temp;
 115
 116         if (pdata->cal_mode == HW_MODE)
 117                 return temp_code;
 118
 119         if (data->soc == SOC_ARCH_EXYNOS4210)
 120                 /* temp_code should range between 75 and 175 */
 121                 if (temp_code < 75 || temp_code > 175) {
 122                         temp = -ENODATA;
 123                         goto out;
 124                 }
 125
 126         switch (pdata->cal_type) {
 127         case TYPE_TWO_POINT_TRIMMING:
 128                 temp = (temp_code - data->temp_error1) *
 129                         (pdata->second_point_trim - pdata->first_point_trim) /
 130                         (data->temp_error2 - data->temp_error1) +
 131                         pdata->first_point_trim;
 132                 break;
 133         case TYPE_ONE_POINT_TRIMMING:
 134                 temp = temp_code - data->temp_error1 + pdata->first_point_trim;
 135                 break;
 136         default:
 137                 temp = temp_code - pdata->default_temp_offset;
 138                 break;
 139         }
 140 out:
 141         return temp;
 142 }
 143
 144 static int exynos_tmu_initialize(struct platform_device *pdev)
 145 {
 146         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 147         struct exynos_tmu_platform_data *pdata = data->pdata;
 148         const struct exynos_tmu_registers *reg = pdata->registers;
 149         unsigned int status, trim_info = 0, con;
 150         unsigned int rising_threshold = 0, falling_threshold = 0;
 151         int ret = 0, threshold_code, i, trigger_levs = 0;
 152
 153         mutex_lock(&data->lock);
 154         clk_enable(data->clk);
 155
 156         if (TMU_SUPPORTS(pdata, READY_STATUS)) {
 157                 status = readb(data->base + reg->tmu_status);
 158                 if (!status) {
 159                         ret = -EBUSY;
 160                         goto out;
 161                 }
 162         }
 163
 164         if (TMU_SUPPORTS(pdata, TRIM_RELOAD))
 165                 __raw_writel(1, data->base + reg->triminfo_ctrl);
 166
 167         if (pdata->cal_mode == HW_MODE)
 168                 goto skip_calib_data;
 169
 170         /* Save trimming info in order to perform calibration */
 171         if (data->soc == SOC_ARCH_EXYNOS5440) {
 172                 /*
 173                  * For exynos5440 soc triminfo value is swapped between TMU0 and
 174                  * TMU2, so the below logic is needed.
 175                  */
 176                 switch (data->id) {
 177                 case 0:
 178                         trim_info = readl(data->base +
 179                         EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
 180                         break;
 181                 case 1:
 182                         trim_info = readl(data->base + reg->triminfo_data);
 183                         break;
 184                 case 2:
 185                         trim_info = readl(data->base -
 186                         EXYNOS5440_EFUSE_SWAP_OFFSET + reg->triminfo_data);
 187                 }
 188         } else {
 189                 trim_info = readl(data->base + reg->triminfo_data);
 190         }
 191         data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
 192         data->temp_error2 = ((trim_info >> reg->triminfo_85_shift) &
 193                                 EXYNOS_TMU_TEMP_MASK);
 194
 195         if (!data->temp_error1 ||
 196                 (pdata->min_efuse_value > data->temp_error1) ||
 197                 (data->temp_error1 > pdata->max_efuse_value))
 198                 data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;
 199
 200         if (!data->temp_error2)
 201                 data->temp_error2 =
 202                         (pdata->efuse_value >> reg->triminfo_85_shift) &
 203                         EXYNOS_TMU_TEMP_MASK;
 204
 205 skip_calib_data:
 206         if (pdata->max_trigger_level > MAX_THRESHOLD_LEVS) {
 207                 dev_err(&pdev->dev, "Invalid max trigger level\n");
 208                 goto out;
 209         }
 210
 211         for (i = 0; i < pdata->max_trigger_level; i++) {
 212                 if (!pdata->trigger_levels[i])
 213                         continue;
 214
 215                 if ((pdata->trigger_type[i] == HW_TRIP) &&
 216                 (!pdata->trigger_levels[pdata->max_trigger_level - 1])) {
 217                         dev_err(&pdev->dev, "Invalid hw trigger level\n");
 218                         ret = -EINVAL;
 219                         goto out;
 220                 }
 221
 222                 /* Count trigger levels except the HW trip*/
 223                 if (!(pdata->trigger_type[i] == HW_TRIP))
 224                         trigger_levs++;
 225         }
 226
 227         if (data->soc == SOC_ARCH_EXYNOS4210) {
 228                 /* Write temperature code for threshold */
 229                 threshold_code = temp_to_code(data, pdata->threshold);
 230                 if (threshold_code < 0) {
 231                         ret = threshold_code;
 232                         goto out;
 233                 }
 234                 writeb(threshold_code,
 235                         data->base + reg->threshold_temp);
 236                 for (i = 0; i < trigger_levs; i++)
 237                         writeb(pdata->trigger_levels[i], data->base +
 238                         reg->threshold_th0 + i * sizeof(reg->threshold_th0));
 239
 240                 writel(reg->inten_rise_mask, data->base + reg->tmu_intclear);
 241         } else {
 242                 /* Write temperature code for rising and falling threshold */
 243                 for (i = 0;
 244                 i < trigger_levs && i < EXYNOS_MAX_TRIGGER_PER_REG; i++) {
 245                         threshold_code = temp_to_code(data,
 246                                                 pdata->trigger_levels[i]);
 247                         if (threshold_code < 0) {
 248                                 ret = threshold_code;
 249                                 goto out;
 250                         }
 251                         rising_threshold |= threshold_code << 8 * i;
 252                         if (pdata->threshold_falling) {
 253                                 threshold_code = temp_to_code(data,
 254                                                 pdata->trigger_levels[i] -
 255                                                 pdata->threshold_falling);
 256                                 if (threshold_code > 0)
 257                                         falling_threshold |=
 258                                                 threshold_code << 8 * i;
 259                         }
 260                 }
 261
 262                 writel(rising_threshold,
 263                                 data->base + reg->threshold_th0);
 264                 writel(falling_threshold,
 265                                 data->base + reg->threshold_th1);
 266
 267                 writel((reg->inten_rise_mask << reg->inten_rise_shift) |
 268                         (reg->inten_fall_mask << reg->inten_fall_shift),
 269                                 data->base + reg->tmu_intclear);
 270
 271                 /* if last threshold limit is also present */
 272                 i = pdata->max_trigger_level - 1;
 273                 if (pdata->trigger_levels[i] &&
 274                                 (pdata->trigger_type[i] == HW_TRIP)) {
 275                         threshold_code = temp_to_code(data,
 276                                                 pdata->trigger_levels[i]);
 277                         if (threshold_code < 0) {
 278                                 ret = threshold_code;
 279                                 goto out;
 280                         }
 281                         if (i == EXYNOS_MAX_TRIGGER_PER_REG - 1) {
 282                                 /* 1-4 level to be assigned in th0 reg */
 283                                 rising_threshold |= threshold_code << 8 * i;
 284                                 writel(rising_threshold,
 285                                         data->base + reg->threshold_th0);
 286                         } else if (i == EXYNOS_MAX_TRIGGER_PER_REG) {
 287                                 /* 5th level to be assigned in th2 reg */
 288                                 rising_threshold =
 289                                 threshold_code << reg->threshold_th3_l0_shift;
 290                                 writel(rising_threshold,
 291                                         data->base + reg->threshold_th2);
 292                         }
 293                         con = readl(data->base + reg->tmu_ctrl);
 294                         con |= (1 << reg->therm_trip_en_shift);
 295                         writel(con, data->base + reg->tmu_ctrl);
 296                 }
 297         }
 298         /*Clear the PMIN in the common TMU register*/
 299         if (reg->tmu_pmin && !data->id)
 300                 writel(0, data->base_common + reg->tmu_pmin);
 301 out:
 302         clk_disable(data->clk);
 303         mutex_unlock(&data->lock);
 304
 305         return ret;
 306 }
 307
 308 static void exynos_tmu_control(struct platform_device *pdev, bool on)
 309 {
 310         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 311         struct exynos_tmu_platform_data *pdata = data->pdata;
 312         const struct exynos_tmu_registers *reg = pdata->registers;
 313         unsigned int con, interrupt_en, cal_val;
 314
 315         mutex_lock(&data->lock);
 316         clk_enable(data->clk);
 317
 318         con = readl(data->base + reg->tmu_ctrl);
 319
 320         if (pdata->test_mux)
 321                 con |= (pdata->test_mux << reg->test_mux_addr_shift);
 322
 323         if (pdata->reference_voltage) {
 324                 con &= ~(reg->buf_vref_sel_mask << reg->buf_vref_sel_shift);
 325                 con |= pdata->reference_voltage << reg->buf_vref_sel_shift;
 326         }
 327
 328         if (pdata->gain) {
 329                 con &= ~(reg->buf_slope_sel_mask << reg->buf_slope_sel_shift);
 330                 con |= (pdata->gain << reg->buf_slope_sel_shift);
 331         }
 332
 333         if (pdata->noise_cancel_mode) {
 334                 con &= ~(reg->therm_trip_mode_mask <<
 335                                         reg->therm_trip_mode_shift);
 336                 con |= (pdata->noise_cancel_mode << reg->therm_trip_mode_shift);
 337         }
 338
 339         if (pdata->cal_mode == HW_MODE) {
 340                 con &= ~(reg->calib_mode_mask << reg->calib_mode_shift);
 341                 cal_val = 0;
 342                 switch (pdata->cal_type) {
 343                 case TYPE_TWO_POINT_TRIMMING:
 344                         cal_val = 3;
 345                         break;
 346                 case TYPE_ONE_POINT_TRIMMING_85:
 347                         cal_val = 2;
 348                         break;
 349                 case TYPE_ONE_POINT_TRIMMING_25:
 350                         cal_val = 1;
 351                         break;
 352                 case TYPE_NONE:
 353                         break;
 354                 default:
 355                         dev_err(&pdev->dev, "Invalid calibration type, using none\n");
 356                 }
 357                 con |= cal_val << reg->calib_mode_shift;
 358         }
 359
 360         if (on) {
 361                 con |= (1 << reg->core_en_shift);
 362                 interrupt_en =
 363                         pdata->trigger_enable[3] << reg->inten_rise3_shift |
 364                         pdata->trigger_enable[2] << reg->inten_rise2_shift |
 365                         pdata->trigger_enable[1] << reg->inten_rise1_shift |
 366                         pdata->trigger_enable[0] << reg->inten_rise0_shift;
 367                 if (TMU_SUPPORTS(pdata, FALLING_TRIP))
 368                         interrupt_en |=
 369                                 interrupt_en << reg->inten_fall0_shift;
 370         } else {
 371                 con &= ~(1 << reg->core_en_shift);
 372                 interrupt_en = 0; /* Disable all interrupts */
 373         }
 374         writel(interrupt_en, data->base + reg->tmu_inten);
 375         writel(con, data->base + reg->tmu_ctrl);
 376
 377         clk_disable(data->clk);
 378         mutex_unlock(&data->lock);
 379 }
 380
 381 static int exynos_tmu_read(struct exynos_tmu_data *data)
 382 {
 383         struct exynos_tmu_platform_data *pdata = data->pdata;
 384         const struct exynos_tmu_registers *reg = pdata->registers;
 385         u8 temp_code;
 386         int temp;
 387
 388         mutex_lock(&data->lock);
 389         clk_enable(data->clk);
 390
 391         temp_code = readb(data->base + reg->tmu_cur_temp);
 392         temp = code_to_temp(data, temp_code);
 393
 394         clk_disable(data->clk);
 395         mutex_unlock(&data->lock);
 396
 397         return temp;
 398 }
 399
 400 #ifdef CONFIG_THERMAL_EMULATION
 401 static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
 402 {
 403         struct exynos_tmu_data *data = drv_data;
 404         struct exynos_tmu_platform_data *pdata = data->pdata;
 405         const struct exynos_tmu_registers *reg = pdata->registers;
 406         unsigned int val;
 407         int ret = -EINVAL;
 408
 409         if (!TMU_SUPPORTS(pdata, EMULATION))
 410                 goto out;
 411
 412         if (temp && temp < MCELSIUS)
 413                 goto out;
 414
 415         mutex_lock(&data->lock);
 416         clk_enable(data->clk);
 417
 418         val = readl(data->base + reg->emul_con);
 419
 420         if (temp) {
 421                 temp /= MCELSIUS;
 422
 423                 if (TMU_SUPPORTS(pdata, EMUL_TIME)) {
 424                         val &= ~(EXYNOS_EMUL_TIME_MASK << reg->emul_time_shift);
 425                         val |= (EXYNOS_EMUL_TIME << reg->emul_time_shift);
 426                 }
 427                 val &= ~(EXYNOS_EMUL_DATA_MASK << reg->emul_temp_shift);
 428                 val |= (temp_to_code(data, temp) << reg->emul_temp_shift) |
 429                         EXYNOS_EMUL_ENABLE;
 430         } else {
 431                 val &= ~EXYNOS_EMUL_ENABLE;
 432         }
 433
 434         writel(val, data->base + reg->emul_con);
 435
 436         clk_disable(data->clk);
 437         mutex_unlock(&data->lock);
 438         return 0;
 439 out:
 440         return ret;
 441 }
 442 #else
 443 static int exynos_tmu_set_emulation(void *drv_data,     unsigned long temp)
 444         { return -EINVAL; }
 445 #endif/*CONFIG_THERMAL_EMULATION*/
 446
 447 static void exynos_tmu_work(struct work_struct *work)
 448 {
 449         struct exynos_tmu_data *data = container_of(work,
 450                         struct exynos_tmu_data, irq_work);
 451         struct exynos_tmu_platform_data *pdata = data->pdata;
 452         const struct exynos_tmu_registers *reg = pdata->registers;
 453         unsigned int val_irq, val_type;
 454
 455         /* Find which sensor generated this interrupt */
 456         if (reg->tmu_irqstatus) {
 457                 val_type = readl(data->base_common + reg->tmu_irqstatus);
 458                 if (!((val_type >> data->id) & 0x1))
 459                         goto out;
 460         }
 461
 462         exynos_report_trigger(data->reg_conf);
 463         mutex_lock(&data->lock);
 464         clk_enable(data->clk);
 465
 466         /* TODO: take action based on particular interrupt */
 467         val_irq = readl(data->base + reg->tmu_intstat);
 468         /* clear the interrupts */
 469         writel(val_irq, data->base + reg->tmu_intclear);
 470
 471         clk_disable(data->clk);
 472         mutex_unlock(&data->lock);
 473 out:
 474         enable_irq(data->irq);
 475 }
 476
 477 static irqreturn_t exynos_tmu_irq(int irq, void *id)
 478 {
 479         struct exynos_tmu_data *data = id;
 480
 481         disable_irq_nosync(irq);
 482         schedule_work(&data->irq_work);
 483
 484         return IRQ_HANDLED;
 485 }
 486
 487 static const struct of_device_id exynos_tmu_match[] = {
 488         {
 489                 .compatible = "samsung,exynos4210-tmu",
 490                 .data = (void *)EXYNOS4210_TMU_DRV_DATA,
 491         },
 492         {
 493                 .compatible = "samsung,exynos4412-tmu",
 494                 .data = (void *)EXYNOS4412_TMU_DRV_DATA,
 495         },
 496         {
 497                 .compatible = "samsung,exynos5250-tmu",
 498                 .data = (void *)EXYNOS5250_TMU_DRV_DATA,
 499         },
 500         {
 501                 .compatible = "samsung,exynos5440-tmu",
 502                 .data = (void *)EXYNOS5440_TMU_DRV_DATA,
 503         },
 504         {},
 505 };
 506 MODULE_DEVICE_TABLE(of, exynos_tmu_match);
 507
 508 static inline struct  exynos_tmu_platform_data *exynos_get_driver_data(
 509                         struct platform_device *pdev, int id)
 510 {
 511         struct  exynos_tmu_init_data *data_table;
 512         struct exynos_tmu_platform_data *tmu_data;
 513         const struct of_device_id *match;
 514
 515         match = of_match_node(exynos_tmu_match, pdev->dev.of_node);
 516         if (!match)
 517                 return NULL;
 518         data_table = (struct exynos_tmu_init_data *) match->data;
 519         if (!data_table || id >= data_table->tmu_count)
 520                 return NULL;
 521         tmu_data = data_table->tmu_data;
 522         return (struct exynos_tmu_platform_data *) (tmu_data + id);
 523 }
 524
 525 static int exynos_map_dt_data(struct platform_device *pdev)
 526 {
 527         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 528         struct exynos_tmu_platform_data *pdata;
 529         struct resource res;
 530         int ret;
 531
 532         if (!data || !pdev->dev.of_node)
 533                 return -ENODEV;
 534
 535         /*
 536          * Try enabling the regulator if found
 537          * TODO: Add regulator as an SOC feature, so that regulator enable
 538          * is a compulsory call.
 539          */
 540         data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
 541         if (!IS_ERR(data->regulator)) {
 542                 ret = regulator_enable(data->regulator);
 543                 if (ret) {
 544                         dev_err(&pdev->dev, "failed to enable vtmu\n");
 545                         return ret;
 546                 }
 547         } else {
 548                 dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
 549         }
 550
 551         data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
 552         if (data->id < 0)
 553                 data->id = 0;
 554
 555         data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 556         if (data->irq <= 0) {
 557                 dev_err(&pdev->dev, "failed to get IRQ\n");
 558                 return -ENODEV;
 559         }
 560
 561         if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
 562                 dev_err(&pdev->dev, "failed to get Resource 0\n");
 563                 return -ENODEV;
 564         }
 565
 566         data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
 567         if (!data->base) {
 568                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
 569                 return -EADDRNOTAVAIL;
 570         }
 571
 572         pdata = exynos_get_driver_data(pdev, data->id);
 573         if (!pdata) {
 574                 dev_err(&pdev->dev, "No platform init data supplied.\n");
 575                 return -ENODEV;
 576         }
 577         data->pdata = pdata;
 578         /*
 579          * Check if the TMU shares some registers and then try to map the
 580          * memory of common registers.
 581          */
 582         if (!TMU_SUPPORTS(pdata, SHARED_MEMORY))
 583                 return 0;
 584
 585         if (of_address_to_resource(pdev->dev.of_node, 1, &res)) {
 586                 dev_err(&pdev->dev, "failed to get Resource 1\n");
 587                 return -ENODEV;
 588         }
 589
 590         data->base_common = devm_ioremap(&pdev->dev, res.start,
 591                                         resource_size(&res));
 592         if (!data->base_common) {
 593                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
 594                 return -ENOMEM;
 595         }
 596
 597         return 0;
 598 }
 599
 600 static int exynos_tmu_probe(struct platform_device *pdev)
 601 {
 602         struct exynos_tmu_data *data;
 603         struct exynos_tmu_platform_data *pdata;
 604         struct thermal_sensor_conf *sensor_conf;
 605         int ret, i;
 606
 607         data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
 608                                         GFP_KERNEL);
 609         if (!data) {
 610                 dev_err(&pdev->dev, "Failed to allocate driver structure\n");
 611                 return -ENOMEM;
 612         }
 613
 614         platform_set_drvdata(pdev, data);
 615         mutex_init(&data->lock);
 616
 617         ret = exynos_map_dt_data(pdev);
 618         if (ret)
 619                 return ret;
 620
 621         pdata = data->pdata;
 622
 623         INIT_WORK(&data->irq_work, exynos_tmu_work);
 624
 625         data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
 626         if (IS_ERR(data->clk)) {
 627                 dev_err(&pdev->dev, "Failed to get clock\n");
 628                 return  PTR_ERR(data->clk);
 629         }
 630
 631         ret = clk_prepare(data->clk);
 632         if (ret)
 633                 return ret;
 634
 635         if (pdata->type == SOC_ARCH_EXYNOS4210 ||
 636             pdata->type == SOC_ARCH_EXYNOS4412 ||
 637             pdata->type == SOC_ARCH_EXYNOS5250 ||
 638             pdata->type == SOC_ARCH_EXYNOS5440)
 639                 data->soc = pdata->type;
 640         else {
 641                 ret = -EINVAL;
 642                 dev_err(&pdev->dev, "Platform not supported\n");
 643                 goto err_clk;
 644         }
 645
 646         ret = exynos_tmu_initialize(pdev);
 647         if (ret) {
 648                 dev_err(&pdev->dev, "Failed to initialize TMU\n");
 649                 goto err_clk;
 650         }
 651
 652         exynos_tmu_control(pdev, true);
 653
 654         /* Allocate a structure to register with the exynos core thermal */
 655         sensor_conf = devm_kzalloc(&pdev->dev,
 656                                 sizeof(struct thermal_sensor_conf), GFP_KERNEL);
 657         if (!sensor_conf) {
 658                 dev_err(&pdev->dev, "Failed to allocate registration struct\n");
 659                 ret = -ENOMEM;
 660                 goto err_clk;
 661         }
 662         sprintf(sensor_conf->name, "therm_zone%d", data->id);
 663         sensor_conf->read_temperature = (int (*)(void *))exynos_tmu_read;
 664         sensor_conf->write_emul_temp =
 665                 (int (*)(void *, unsigned long))exynos_tmu_set_emulation;
 666         sensor_conf->driver_data = data;
 667         sensor_conf->trip_data.trip_count = pdata->trigger_enable[0] +
 668                         pdata->trigger_enable[1] + pdata->trigger_enable[2]+
 669                         pdata->trigger_enable[3];
 670
 671         for (i = 0; i < sensor_conf->trip_data.trip_count; i++) {
 672                 sensor_conf->trip_data.trip_val[i] =
 673                         pdata->threshold + pdata->trigger_levels[i];
 674                 sensor_conf->trip_data.trip_type[i] =
 675                                         pdata->trigger_type[i];
 676         }
 677
 678         sensor_conf->trip_data.trigger_falling = pdata->threshold_falling;
 679
 680         sensor_conf->cooling_data.freq_clip_count = pdata->freq_tab_count;
 681         for (i = 0; i < pdata->freq_tab_count; i++) {
 682                 sensor_conf->cooling_data.freq_data[i].freq_clip_max =
 683                                         pdata->freq_tab[i].freq_clip_max;
 684                 sensor_conf->cooling_data.freq_data[i].temp_level =
 685                                         pdata->freq_tab[i].temp_level;
 686         }
 687         sensor_conf->dev = &pdev->dev;
 688         /* Register the sensor with thermal management interface */
 689         ret = exynos_register_thermal(sensor_conf);
 690         if (ret) {
 691                 dev_err(&pdev->dev, "Failed to register thermal interface\n");
 692                 goto err_clk;
 693         }
 694         data->reg_conf = sensor_conf;
 695
 696         ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
 697                 IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
 698         if (ret) {
 699                 dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
 700                 goto err_clk;
 701         }
 702
 703         return 0;
 704 err_clk:
 705         clk_unprepare(data->clk);
 706         return ret;
 707 }
 708
 709 static int exynos_tmu_remove(struct platform_device *pdev)
 710 {
 711         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 712
 713         exynos_tmu_control(pdev, false);
 714
 715         exynos_unregister_thermal(data->reg_conf);
 716
 717         clk_unprepare(data->clk);
 718
 719         if (!IS_ERR(data->regulator))
 720                 regulator_disable(data->regulator);
 721
 722         return 0;
 723 }
 724
 725 #ifdef CONFIG_PM_SLEEP
 726 static int exynos_tmu_suspend(struct device *dev)
 727 {
 728         exynos_tmu_control(to_platform_device(dev), false);
 729
 730         return 0;
 731 }
 732
 733 static int exynos_tmu_resume(struct device *dev)
 734 {
 735         struct platform_device *pdev = to_platform_device(dev);
 736
 737         exynos_tmu_initialize(pdev);
 738         exynos_tmu_control(pdev, true);
 739
 740         return 0;
 741 }
 742
 743 static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
 744                          exynos_tmu_suspend, exynos_tmu_resume);
 745 #define EXYNOS_TMU_PM   (&exynos_tmu_pm)
 746 #else
 747 #define EXYNOS_TMU_PM   NULL
 748 #endif
 749
 750 static struct platform_driver exynos_tmu_driver = {
 751         .driver = {
 752                 .name   = "exynos-tmu",
 753                 .owner  = THIS_MODULE,
 754                 .pm     = EXYNOS_TMU_PM,
 755                 .of_match_table = exynos_tmu_match,
 756         },
 757         .probe = exynos_tmu_probe,
 758         .remove = exynos_tmu_remove,
 759 };
 760
 761 module_platform_driver(exynos_tmu_driver);
 762
 763 MODULE_DESCRIPTION("EXYNOS TMU Driver");
 764 MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
 765 MODULE_LICENSE("GPL");
 766 MODULE_ALIAS("platform:exynos-tmu");