drivers/thermal/samsung/exynos_tmu.c

   1 /*
   2  * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
   3  *
   4  *  Copyright (C) 2014 Samsung Electronics
   5  *  Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
   6  *  Lukasz Majewski <l.majewski@samsung.com>
   7  *
   8  *  Copyright (C) 2011 Samsung Electronics
   9  *  Donggeun Kim <dg77.kim@samsung.com>
  10  *  Amit Daniel Kachhap <amit.kachhap@linaro.org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  *
  26  */
  27
  28 #include <linux/clk.h>
  29 #include <linux/io.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/module.h>
  32 #include <linux/of_device.h>
  33 #include <linux/of_address.h>
  34 #include <linux/of_irq.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/regulator/consumer.h>
  37
  38 #include <dt-bindings/thermal/thermal_exynos.h>
  39
  40 #include "../thermal_core.h"
  41
  42 /* Exynos generic registers */
  43 #define EXYNOS_TMU_REG_TRIMINFO         0x0
  44 #define EXYNOS_TMU_REG_CONTROL          0x20
  45 #define EXYNOS_TMU_REG_STATUS           0x28
  46 #define EXYNOS_TMU_REG_CURRENT_TEMP     0x40
  47 #define EXYNOS_TMU_REG_INTEN            0x70
  48 #define EXYNOS_TMU_REG_INTSTAT          0x74
  49 #define EXYNOS_TMU_REG_INTCLEAR         0x78
  50
  51 #define EXYNOS_TMU_TEMP_MASK            0xff
  52 #define EXYNOS_TMU_REF_VOLTAGE_SHIFT    24
  53 #define EXYNOS_TMU_REF_VOLTAGE_MASK     0x1f
  54 #define EXYNOS_TMU_BUF_SLOPE_SEL_MASK   0xf
  55 #define EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT  8
  56 #define EXYNOS_TMU_CORE_EN_SHIFT        0
  57
  58 /* Exynos3250 specific registers */
  59 #define EXYNOS_TMU_TRIMINFO_CON1        0x10
  60
  61 /* Exynos4210 specific registers */
  62 #define EXYNOS4210_TMU_REG_THRESHOLD_TEMP       0x44
  63 #define EXYNOS4210_TMU_REG_TRIG_LEVEL0  0x50
  64
  65 /* Exynos5250, Exynos4412, Exynos3250 specific registers */
  66 #define EXYNOS_TMU_TRIMINFO_CON2        0x14
  67 #define EXYNOS_THD_TEMP_RISE            0x50
  68 #define EXYNOS_THD_TEMP_FALL            0x54
  69 #define EXYNOS_EMUL_CON         0x80
  70
  71 #define EXYNOS_TRIMINFO_RELOAD_ENABLE   1
  72 #define EXYNOS_TRIMINFO_25_SHIFT        0
  73 #define EXYNOS_TRIMINFO_85_SHIFT        8
  74 #define EXYNOS_TMU_TRIP_MODE_SHIFT      13
  75 #define EXYNOS_TMU_TRIP_MODE_MASK       0x7
  76 #define EXYNOS_TMU_THERM_TRIP_EN_SHIFT  12
  77
  78 #define EXYNOS_TMU_INTEN_RISE0_SHIFT    0
  79 #define EXYNOS_TMU_INTEN_FALL0_SHIFT    16
  80
  81 #define EXYNOS_EMUL_TIME        0x57F0
  82 #define EXYNOS_EMUL_TIME_MASK   0xffff
  83 #define EXYNOS_EMUL_TIME_SHIFT  16
  84 #define EXYNOS_EMUL_DATA_SHIFT  8
  85 #define EXYNOS_EMUL_DATA_MASK   0xFF
  86 #define EXYNOS_EMUL_ENABLE      0x1
  87
  88 /* Exynos5260 specific */
  89 #define EXYNOS5260_TMU_REG_INTEN                0xC0
  90 #define EXYNOS5260_TMU_REG_INTSTAT              0xC4
  91 #define EXYNOS5260_TMU_REG_INTCLEAR             0xC8
  92 #define EXYNOS5260_EMUL_CON                     0x100
  93
  94 /* Exynos4412 specific */
  95 #define EXYNOS4412_MUX_ADDR_VALUE          6
  96 #define EXYNOS4412_MUX_ADDR_SHIFT          20
  97
  98 /* Exynos5433 specific registers */
  99 #define EXYNOS5433_THD_TEMP_RISE3_0             0x050
 100 #define EXYNOS5433_THD_TEMP_RISE7_4             0x054
 101 #define EXYNOS5433_THD_TEMP_FALL3_0             0x060
 102 #define EXYNOS5433_THD_TEMP_FALL7_4             0x064
 103 #define EXYNOS5433_TMU_REG_INTEN                0x0c0
 104 #define EXYNOS5433_TMU_REG_INTPEND              0x0c8
 105 #define EXYNOS5433_TMU_EMUL_CON                 0x110
 106 #define EXYNOS5433_TMU_PD_DET_EN                0x130
 107
 108 #define EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT     16
 109 #define EXYNOS5433_TRIMINFO_CALIB_SEL_SHIFT     23
 110 #define EXYNOS5433_TRIMINFO_SENSOR_ID_MASK      \
 111                         (0xf << EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT)
 112 #define EXYNOS5433_TRIMINFO_CALIB_SEL_MASK      BIT(23)
 113
 114 #define EXYNOS5433_TRIMINFO_ONE_POINT_TRIMMING  0
 115 #define EXYNOS5433_TRIMINFO_TWO_POINT_TRIMMING  1
 116
 117 #define EXYNOS5433_PD_DET_EN                    1
 118
 119 #define EXYNOS5433_G3D_BASE                     0x10070000
 120
 121 /* Exynos7 specific registers */
 122 #define EXYNOS7_THD_TEMP_RISE7_6                0x50
 123 #define EXYNOS7_THD_TEMP_FALL7_6                0x60
 124 #define EXYNOS7_TMU_REG_INTEN                   0x110
 125 #define EXYNOS7_TMU_REG_INTPEND                 0x118
 126 #define EXYNOS7_TMU_REG_EMUL_CON                0x160
 127
 128 #define EXYNOS7_TMU_TEMP_MASK                   0x1ff
 129 #define EXYNOS7_PD_DET_EN_SHIFT                 23
 130 #define EXYNOS7_TMU_INTEN_RISE0_SHIFT           0
 131 #define EXYNOS7_EMUL_DATA_SHIFT                 7
 132 #define EXYNOS7_EMUL_DATA_MASK                  0x1ff
 133
 134 #define EXYNOS_FIRST_POINT_TRIM                 25
 135 #define EXYNOS_SECOND_POINT_TRIM                85
 136
 137 #define EXYNOS_NOISE_CANCEL_MODE                4
 138
 139 #define MCELSIUS        1000
 140
 141 enum soc_type {
 142         SOC_ARCH_EXYNOS3250 = 1,
 143         SOC_ARCH_EXYNOS4210,
 144         SOC_ARCH_EXYNOS4412,
 145         SOC_ARCH_EXYNOS5250,
 146         SOC_ARCH_EXYNOS5260,
 147         SOC_ARCH_EXYNOS5420,
 148         SOC_ARCH_EXYNOS5420_TRIMINFO,
 149         SOC_ARCH_EXYNOS5433,
 150         SOC_ARCH_EXYNOS7,
 151 };
 152
 153 /**
 154  * struct exynos_tmu_data : A structure to hold the private data of the TMU
 155         driver
 156  * @id: identifier of the one instance of the TMU controller.
 157  * @base: base address of the single instance of the TMU controller.
 158  * @base_second: base address of the common registers of the TMU controller.
 159  * @irq: irq number of the TMU controller.
 160  * @soc: id of the SOC type.
 161  * @irq_work: pointer to the irq work structure.
 162  * @lock: lock to implement synchronization.
 163  * @clk: pointer to the clock structure.
 164  * @clk_sec: pointer to the clock structure for accessing the base_second.
 165  * @sclk: pointer to the clock structure for accessing the tmu special clk.
 166  * @cal_type: calibration type for temperature
 167  * @efuse_value: SoC defined fuse value
 168  * @min_efuse_value: minimum valid trimming data
 169  * @max_efuse_value: maximum valid trimming data
 170  * @temp_error1: fused value of the first point trim.
 171  * @temp_error2: fused value of the second point trim.
 172  * @gain: gain of amplifier in the positive-TC generator block
 173  *      0 < gain <= 15
 174  * @reference_voltage: reference voltage of amplifier
 175  *      in the positive-TC generator block
 176  *      0 < reference_voltage <= 31
 177  * @regulator: pointer to the TMU regulator structure.
 178  * @reg_conf: pointer to structure to register with core thermal.
 179  * @ntrip: number of supported trip points.
 180  * @enabled: current status of TMU device
 181  * @tmu_initialize: SoC specific TMU initialization method
 182  * @tmu_control: SoC specific TMU control method
 183  * @tmu_read: SoC specific TMU temperature read method
 184  * @tmu_set_emulation: SoC specific TMU emulation setting method
 185  * @tmu_clear_irqs: SoC specific TMU interrupts clearing method
 186  */
 187 struct exynos_tmu_data {
 188         int id;
 189         void __iomem *base;
 190         void __iomem *base_second;
 191         int irq;
 192         enum soc_type soc;
 193         struct work_struct irq_work;
 194         struct mutex lock;
 195         struct clk *clk, *clk_sec, *sclk;
 196         u32 cal_type;
 197         u32 efuse_value;
 198         u32 min_efuse_value;
 199         u32 max_efuse_value;
 200         u16 temp_error1, temp_error2;
 201         u8 gain;
 202         u8 reference_voltage;
 203         struct regulator *regulator;
 204         struct thermal_zone_device *tzd;
 205         unsigned int ntrip;
 206         bool enabled;
 207
 208         void (*tmu_set_trip_temp)(struct exynos_tmu_data *data, int trip,
 209                                  u8 temp);
 210         void (*tmu_set_trip_hyst)(struct exynos_tmu_data *data, int trip,
 211                                  u8 temp, u8 hyst);
 212         void (*tmu_initialize)(struct platform_device *pdev);
 213         void (*tmu_control)(struct platform_device *pdev, bool on);
 214         int (*tmu_read)(struct exynos_tmu_data *data);
 215         void (*tmu_set_emulation)(struct exynos_tmu_data *data, int temp);
 216         void (*tmu_clear_irqs)(struct exynos_tmu_data *data);
 217 };
 218
 219 /*
 220  * TMU treats temperature as a mapped temperature code.
 221  * The temperature is converted differently depending on the calibration type.
 222  */
 223 static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
 224 {
 225         if (data->cal_type == TYPE_ONE_POINT_TRIMMING)
 226                 return temp + data->temp_error1 - EXYNOS_FIRST_POINT_TRIM;
 227
 228         return (temp - EXYNOS_FIRST_POINT_TRIM) *
 229                 (data->temp_error2 - data->temp_error1) /
 230                 (EXYNOS_SECOND_POINT_TRIM - EXYNOS_FIRST_POINT_TRIM) +
 231                 data->temp_error1;
 232 }
 233
 234 /*
 235  * Calculate a temperature value from a temperature code.
 236  * The unit of the temperature is degree Celsius.
 237  */
 238 static int code_to_temp(struct exynos_tmu_data *data, u16 temp_code)
 239 {
 240         if (data->cal_type == TYPE_ONE_POINT_TRIMMING)
 241                 return temp_code - data->temp_error1 + EXYNOS_FIRST_POINT_TRIM;
 242
 243         return (temp_code - data->temp_error1) *
 244                 (EXYNOS_SECOND_POINT_TRIM - EXYNOS_FIRST_POINT_TRIM) /
 245                 (data->temp_error2 - data->temp_error1) +
 246                 EXYNOS_FIRST_POINT_TRIM;
 247 }
 248
 249 static void sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info)
 250 {
 251         u16 tmu_temp_mask =
 252                 (data->soc == SOC_ARCH_EXYNOS7) ? EXYNOS7_TMU_TEMP_MASK
 253                                                 : EXYNOS_TMU_TEMP_MASK;
 254
 255         data->temp_error1 = trim_info & tmu_temp_mask;
 256         data->temp_error2 = ((trim_info >> EXYNOS_TRIMINFO_85_SHIFT) &
 257                                 EXYNOS_TMU_TEMP_MASK);
 258
 259         if (!data->temp_error1 ||
 260             (data->min_efuse_value > data->temp_error1) ||
 261             (data->temp_error1 > data->max_efuse_value))
 262                 data->temp_error1 = data->efuse_value & EXYNOS_TMU_TEMP_MASK;
 263
 264         if (!data->temp_error2)
 265                 data->temp_error2 =
 266                         (data->efuse_value >> EXYNOS_TRIMINFO_85_SHIFT) &
 267                         EXYNOS_TMU_TEMP_MASK;
 268 }
 269
 270 static int exynos_tmu_initialize(struct platform_device *pdev)
 271 {
 272         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 273         struct thermal_zone_device *tzd = data->tzd;
 274         const struct thermal_trip * const trips =
 275                 of_thermal_get_trip_points(tzd);
 276         unsigned int status;
 277         int ret = 0, temp, hyst;
 278
 279         if (!trips) {
 280                 dev_err(&pdev->dev,
 281                         "Cannot get trip points from device tree!\n");
 282                 return -ENODEV;
 283         }
 284
 285         if (data->soc != SOC_ARCH_EXYNOS5433) /* FIXME */
 286                 ret = tzd->ops->get_crit_temp(tzd, &temp);
 287         if (ret) {
 288                 dev_err(&pdev->dev,
 289                         "No CRITICAL trip point defined in device tree!\n");
 290                 goto out;
 291         }
 292
 293         if (of_thermal_get_ntrips(tzd) > data->ntrip) {
 294                 dev_info(&pdev->dev,
 295                          "More trip points than supported by this TMU.\n");
 296                 dev_info(&pdev->dev,
 297                          "%d trip points should be configured in polling mode.\n",
 298                          (of_thermal_get_ntrips(tzd) - data->ntrip));
 299         }
 300
 301         mutex_lock(&data->lock);
 302         clk_enable(data->clk);
 303         if (!IS_ERR(data->clk_sec))
 304                 clk_enable(data->clk_sec);
 305
 306         status = readb(data->base + EXYNOS_TMU_REG_STATUS);
 307         if (!status) {
 308                 ret = -EBUSY;
 309         } else {
 310                 int i, ntrips =
 311                         min_t(int, of_thermal_get_ntrips(tzd), data->ntrip);
 312
 313                 data->tmu_initialize(pdev);
 314
 315                 /* Write temperature code for rising and falling threshold */
 316                 for (i = 0; i < ntrips; i++) {
 317                         /* Write temperature code for rising threshold */
 318                         ret = tzd->ops->get_trip_temp(tzd, i, &temp);
 319                         if (ret)
 320                                 goto err;
 321                         temp /= MCELSIUS;
 322                         data->tmu_set_trip_temp(data, i, temp);
 323
 324                         /* Write temperature code for falling threshold */
 325                         ret = tzd->ops->get_trip_hyst(tzd, i, &hyst);
 326                         if (ret)
 327                                 goto err;
 328                         hyst /= MCELSIUS;
 329                         data->tmu_set_trip_hyst(data, i, temp, hyst);
 330                 }
 331
 332                 data->tmu_clear_irqs(data);
 333         }
 334 err:
 335         clk_disable(data->clk);
 336         mutex_unlock(&data->lock);
 337         if (!IS_ERR(data->clk_sec))
 338                 clk_disable(data->clk_sec);
 339 out:
 340         return ret;
 341 }
 342
 343 static u32 get_con_reg(struct exynos_tmu_data *data, u32 con)
 344 {
 345         if (data->soc == SOC_ARCH_EXYNOS4412 ||
 346             data->soc == SOC_ARCH_EXYNOS3250)
 347                 con |= (EXYNOS4412_MUX_ADDR_VALUE << EXYNOS4412_MUX_ADDR_SHIFT);
 348
 349         con &= ~(EXYNOS_TMU_REF_VOLTAGE_MASK << EXYNOS_TMU_REF_VOLTAGE_SHIFT);
 350         con |= data->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT;
 351
 352         con &= ~(EXYNOS_TMU_BUF_SLOPE_SEL_MASK << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
 353         con |= (data->gain << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
 354
 355         con &= ~(EXYNOS_TMU_TRIP_MODE_MASK << EXYNOS_TMU_TRIP_MODE_SHIFT);
 356         con |= (EXYNOS_NOISE_CANCEL_MODE << EXYNOS_TMU_TRIP_MODE_SHIFT);
 357
 358         return con;
 359 }
 360
 361 static void exynos_tmu_control(struct platform_device *pdev, bool on)
 362 {
 363         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 364
 365         mutex_lock(&data->lock);
 366         clk_enable(data->clk);
 367         data->tmu_control(pdev, on);
 368         data->enabled = on;
 369         clk_disable(data->clk);
 370         mutex_unlock(&data->lock);
 371 }
 372
 373 static void exynos4210_tmu_set_trip_temp(struct exynos_tmu_data *data,
 374                                          int trip, u8 temp)
 375 {
 376         const struct thermal_trip * const trips =
 377                 of_thermal_get_trip_points(data->tzd);
 378         u8 ref, th_code;
 379
 380         ref = trips[0].temperature / MCELSIUS;
 381
 382         if (trip == 0) {
 383                 th_code = temp_to_code(data, ref);
 384                 writeb(th_code, data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP);
 385         }
 386
 387         temp -= ref;
 388         writeb(temp, data->base + EXYNOS4210_TMU_REG_TRIG_LEVEL0 + trip * 4);
 389 }
 390
 391 /* failing thresholds are not supported on Exynos4210 */
 392 static void exynos4210_tmu_set_trip_hyst(struct exynos_tmu_data *data,
 393                                          int trip, u8 temp, u8 hyst)
 394 {
 395 }
 396
 397 static void exynos4210_tmu_initialize(struct platform_device *pdev)
 398 {
 399         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 400
 401         sanitize_temp_error(data, readl(data->base + EXYNOS_TMU_REG_TRIMINFO));
 402 }
 403
 404 static void exynos4412_tmu_set_trip_temp(struct exynos_tmu_data *data,
 405                                          int trip, u8 temp)
 406 {
 407         u32 th, con;
 408
 409         th = readl(data->base + EXYNOS_THD_TEMP_RISE);
 410         th &= ~(0xff << 8 * trip);
 411         th |= temp_to_code(data, temp) << 8 * trip;
 412         writel(th, data->base + EXYNOS_THD_TEMP_RISE);
 413
 414         if (trip == 3) {
 415                 con = readl(data->base + EXYNOS_TMU_REG_CONTROL);
 416                 con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
 417                 writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
 418         }
 419 }
 420
 421 static void exynos4412_tmu_set_trip_hyst(struct exynos_tmu_data *data,
 422                                          int trip, u8 temp, u8 hyst)
 423 {
 424         u32 th;
 425
 426         th = readl(data->base + EXYNOS_THD_TEMP_FALL);
 427         th &= ~(0xff << 8 * trip);
 428         if (hyst)
 429                 th |= temp_to_code(data, temp - hyst) << 8 * trip;
 430         writel(th, data->base + EXYNOS_THD_TEMP_FALL);
 431 }
 432
 433 static void exynos4412_tmu_initialize(struct platform_device *pdev)
 434 {
 435         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 436         unsigned int trim_info, ctrl;
 437
 438         if (data->soc == SOC_ARCH_EXYNOS3250 ||
 439             data->soc == SOC_ARCH_EXYNOS4412 ||
 440             data->soc == SOC_ARCH_EXYNOS5250) {
 441                 if (data->soc == SOC_ARCH_EXYNOS3250) {
 442                         ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1);
 443                         ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
 444                         writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1);
 445                 }
 446                 ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON2);
 447                 ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
 448                 writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON2);
 449         }
 450
 451         /* On exynos5420 the triminfo register is in the shared space */
 452         if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO)
 453                 trim_info = readl(data->base_second + EXYNOS_TMU_REG_TRIMINFO);
 454         else
 455                 trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
 456
 457         sanitize_temp_error(data, trim_info);
 458 }
 459
 460 static void exynos5433_tmu_set_trip_temp(struct exynos_tmu_data *data,
 461                                          int trip, u8 temp)
 462 {
 463         unsigned int reg_off, j;
 464         u32 th;
 465
 466         if (trip > 3) {
 467                 reg_off = EXYNOS5433_THD_TEMP_RISE7_4;
 468                 j = trip - 4;
 469         } else {
 470                 reg_off = EXYNOS5433_THD_TEMP_RISE3_0;
 471                 j = trip;
 472         }
 473
 474         th = readl(data->base + reg_off);
 475         th &= ~(0xff << j * 8);
 476         th |= (temp_to_code(data, temp) << j * 8);
 477         writel(th, data->base + reg_off);
 478 }
 479
 480 static void exynos5433_tmu_set_trip_hyst(struct exynos_tmu_data *data,
 481                                          int trip, u8 temp, u8 hyst)
 482 {
 483         unsigned int reg_off, j;
 484         u32 th;
 485
 486         if (trip > 3) {
 487                 reg_off = EXYNOS5433_THD_TEMP_FALL7_4;
 488                 j = trip - 4;
 489         } else {
 490                 reg_off = EXYNOS5433_THD_TEMP_FALL3_0;
 491                 j = trip;
 492         }
 493
 494         th = readl(data->base + reg_off);
 495         th &= ~(0xff << j * 8);
 496         th |= (temp_to_code(data, temp - hyst) << j * 8);
 497         writel(th, data->base + reg_off);
 498 }
 499
 500 static void exynos5433_tmu_initialize(struct platform_device *pdev)
 501 {
 502         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 503         unsigned int trim_info;
 504         int sensor_id, cal_type;
 505
 506         trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
 507         sanitize_temp_error(data, trim_info);
 508
 509         /* Read the temperature sensor id */
 510         sensor_id = (trim_info & EXYNOS5433_TRIMINFO_SENSOR_ID_MASK)
 511                                 >> EXYNOS5433_TRIMINFO_SENSOR_ID_SHIFT;
 512         dev_info(&pdev->dev, "Temperature sensor ID: 0x%x\n", sensor_id);
 513
 514         /* Read the calibration mode */
 515         writel(trim_info, data->base + EXYNOS_TMU_REG_TRIMINFO);
 516         cal_type = (trim_info & EXYNOS5433_TRIMINFO_CALIB_SEL_MASK)
 517                                 >> EXYNOS5433_TRIMINFO_CALIB_SEL_SHIFT;
 518
 519         switch (cal_type) {
 520         case EXYNOS5433_TRIMINFO_TWO_POINT_TRIMMING:
 521                 data->cal_type = TYPE_TWO_POINT_TRIMMING;
 522                 break;
 523         case EXYNOS5433_TRIMINFO_ONE_POINT_TRIMMING:
 524         default:
 525                 data->cal_type = TYPE_ONE_POINT_TRIMMING;
 526                 break;
 527         }
 528
 529         dev_info(&pdev->dev, "Calibration type is %d-point calibration\n",
 530                         cal_type ?  2 : 1);
 531 }
 532
 533 static void exynos7_tmu_set_trip_temp(struct exynos_tmu_data *data,
 534                                       int trip, u8 temp)
 535 {
 536         unsigned int reg_off, bit_off;
 537         u32 th;
 538
 539         reg_off = ((7 - trip) / 2) * 4;
 540         bit_off = ((8 - trip) % 2);
 541
 542         th = readl(data->base + EXYNOS7_THD_TEMP_RISE7_6 + reg_off);
 543         th &= ~(EXYNOS7_TMU_TEMP_MASK << (16 * bit_off));
 544         th |= temp_to_code(data, temp) << (16 * bit_off);
 545         writel(th, data->base + EXYNOS7_THD_TEMP_RISE7_6 + reg_off);
 546 }
 547
 548 static void exynos7_tmu_set_trip_hyst(struct exynos_tmu_data *data,
 549                                       int trip, u8 temp, u8 hyst)
 550 {
 551         unsigned int reg_off, bit_off;
 552         u32 th;
 553
 554         reg_off = ((7 - trip) / 2) * 4;
 555         bit_off = ((8 - trip) % 2);
 556
 557         th = readl(data->base + EXYNOS7_THD_TEMP_FALL7_6 + reg_off);
 558         th &= ~(EXYNOS7_TMU_TEMP_MASK << (16 * bit_off));
 559         th |= temp_to_code(data, temp - hyst) << (16 * bit_off);
 560         writel(th, data->base + EXYNOS7_THD_TEMP_FALL7_6 + reg_off);
 561 }
 562
 563 static void exynos7_tmu_initialize(struct platform_device *pdev)
 564 {
 565         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 566         unsigned int trim_info;
 567
 568         trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
 569         sanitize_temp_error(data, trim_info);
 570 }
 571
 572 static void exynos4210_tmu_control(struct platform_device *pdev, bool on)
 573 {
 574         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 575         struct thermal_zone_device *tz = data->tzd;
 576         unsigned int con, interrupt_en = 0, i;
 577
 578         con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));
 579
 580         if (on) {
 581                 for (i = 0; i < data->ntrip; i++) {
 582                         if (!of_thermal_is_trip_valid(tz, i))
 583                                 continue;
 584
 585                         interrupt_en |=
 586                                 (1 << (EXYNOS_TMU_INTEN_RISE0_SHIFT + i * 4));
 587                 }
 588
 589                 if (data->soc != SOC_ARCH_EXYNOS4210)
 590                         interrupt_en |=
 591                                 interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
 592
 593                 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
 594         } else {
 595                 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
 596         }
 597
 598         writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN);
 599         writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
 600 }
 601
 602 static void exynos5433_tmu_control(struct platform_device *pdev, bool on)
 603 {
 604         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 605         struct thermal_zone_device *tz = data->tzd;
 606         unsigned int con, interrupt_en = 0, pd_det_en, i;
 607
 608         con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));
 609
 610         if (on) {
 611                 for (i = 0; i < data->ntrip; i++) {
 612                         if (!of_thermal_is_trip_valid(tz, i))
 613                                 continue;
 614
 615                         interrupt_en |=
 616                                 (1 << (EXYNOS7_TMU_INTEN_RISE0_SHIFT + i));
 617                 }
 618
 619                 interrupt_en |=
 620                         interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
 621
 622                 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
 623         } else
 624                 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
 625
 626         pd_det_en = on ? EXYNOS5433_PD_DET_EN : 0;
 627
 628         writel(pd_det_en, data->base + EXYNOS5433_TMU_PD_DET_EN);
 629         writel(interrupt_en, data->base + EXYNOS5433_TMU_REG_INTEN);
 630         writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
 631 }
 632
 633 static void exynos7_tmu_control(struct platform_device *pdev, bool on)
 634 {
 635         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 636         struct thermal_zone_device *tz = data->tzd;
 637         unsigned int con, interrupt_en = 0, i;
 638
 639         con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));
 640
 641         if (on) {
 642                 for (i = 0; i < data->ntrip; i++) {
 643                         if (!of_thermal_is_trip_valid(tz, i))
 644                                 continue;
 645
 646                         interrupt_en |=
 647                                 (1 << (EXYNOS7_TMU_INTEN_RISE0_SHIFT + i));
 648                 }
 649
 650                 interrupt_en |=
 651                         interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
 652
 653                 con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
 654                 con |= (1 << EXYNOS7_PD_DET_EN_SHIFT);
 655         } else {
 656                 con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
 657                 con &= ~(1 << EXYNOS7_PD_DET_EN_SHIFT);
 658         }
 659
 660         writel(interrupt_en, data->base + EXYNOS7_TMU_REG_INTEN);
 661         writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
 662 }
 663
 664 static int exynos_get_temp(void *p, int *temp)
 665 {
 666         struct exynos_tmu_data *data = p;
 667         int value, ret = 0;
 668
 669         if (!data || !data->tmu_read)
 670                 return -EINVAL;
 671         else if (!data->enabled)
 672                 /*
 673                  * Called too early, probably
 674                  * from thermal_zone_of_sensor_register().
 675                  */
 676                 return -EAGAIN;
 677
 678         mutex_lock(&data->lock);
 679         clk_enable(data->clk);
 680
 681         value = data->tmu_read(data);
 682         if (value < 0)
 683                 ret = value;
 684         else
 685                 *temp = code_to_temp(data, value) * MCELSIUS;
 686
 687         clk_disable(data->clk);
 688         mutex_unlock(&data->lock);
 689
 690         return ret;
 691 }
 692
 693 #ifdef CONFIG_THERMAL_EMULATION
 694 static u32 get_emul_con_reg(struct exynos_tmu_data *data, unsigned int val,
 695                             int temp)
 696 {
 697         if (temp) {
 698                 temp /= MCELSIUS;
 699
 700                 val &= ~(EXYNOS_EMUL_TIME_MASK << EXYNOS_EMUL_TIME_SHIFT);
 701                 val |= (EXYNOS_EMUL_TIME << EXYNOS_EMUL_TIME_SHIFT);
 702                 if (data->soc == SOC_ARCH_EXYNOS7) {
 703                         val &= ~(EXYNOS7_EMUL_DATA_MASK <<
 704                                 EXYNOS7_EMUL_DATA_SHIFT);
 705                         val |= (temp_to_code(data, temp) <<
 706                                 EXYNOS7_EMUL_DATA_SHIFT) |
 707                                 EXYNOS_EMUL_ENABLE;
 708                 } else {
 709                         val &= ~(EXYNOS_EMUL_DATA_MASK <<
 710                                 EXYNOS_EMUL_DATA_SHIFT);
 711                         val |= (temp_to_code(data, temp) <<
 712                                 EXYNOS_EMUL_DATA_SHIFT) |
 713                                 EXYNOS_EMUL_ENABLE;
 714                 }
 715         } else {
 716                 val &= ~EXYNOS_EMUL_ENABLE;
 717         }
 718
 719         return val;
 720 }
 721
 722 static void exynos4412_tmu_set_emulation(struct exynos_tmu_data *data,
 723                                          int temp)
 724 {
 725         unsigned int val;
 726         u32 emul_con;
 727
 728         if (data->soc == SOC_ARCH_EXYNOS5260)
 729                 emul_con = EXYNOS5260_EMUL_CON;
 730         else if (data->soc == SOC_ARCH_EXYNOS5433)
 731                 emul_con = EXYNOS5433_TMU_EMUL_CON;
 732         else if (data->soc == SOC_ARCH_EXYNOS7)
 733                 emul_con = EXYNOS7_TMU_REG_EMUL_CON;
 734         else
 735                 emul_con = EXYNOS_EMUL_CON;
 736
 737         val = readl(data->base + emul_con);
 738         val = get_emul_con_reg(data, val, temp);
 739         writel(val, data->base + emul_con);
 740 }
 741
 742 static int exynos_tmu_set_emulation(void *drv_data, int temp)
 743 {
 744         struct exynos_tmu_data *data = drv_data;
 745         int ret = -EINVAL;
 746
 747         if (data->soc == SOC_ARCH_EXYNOS4210)
 748                 goto out;
 749
 750         if (temp && temp < MCELSIUS)
 751                 goto out;
 752
 753         mutex_lock(&data->lock);
 754         clk_enable(data->clk);
 755         data->tmu_set_emulation(data, temp);
 756         clk_disable(data->clk);
 757         mutex_unlock(&data->lock);
 758         return 0;
 759 out:
 760         return ret;
 761 }
 762 #else
 763 #define exynos4412_tmu_set_emulation NULL
 764 static int exynos_tmu_set_emulation(void *drv_data, int temp)
 765         { return -EINVAL; }
 766 #endif /* CONFIG_THERMAL_EMULATION */
 767
 768 static int exynos4210_tmu_read(struct exynos_tmu_data *data)
 769 {
 770         int ret = readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
 771
 772         /* "temp_code" should range between 75 and 175 */
 773         return (ret < 75 || ret > 175) ? -ENODATA : ret;
 774 }
 775
 776 static int exynos4412_tmu_read(struct exynos_tmu_data *data)
 777 {
 778         return readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
 779 }
 780
 781 static int exynos7_tmu_read(struct exynos_tmu_data *data)
 782 {
 783         return readw(data->base + EXYNOS_TMU_REG_CURRENT_TEMP) &
 784                 EXYNOS7_TMU_TEMP_MASK;
 785 }
 786
 787 static void exynos_tmu_work(struct work_struct *work)
 788 {
 789         struct exynos_tmu_data *data = container_of(work,
 790                         struct exynos_tmu_data, irq_work);
 791
 792         thermal_zone_device_update(data->tzd, THERMAL_EVENT_UNSPECIFIED);
 793
 794         mutex_lock(&data->lock);
 795         clk_enable(data->clk);
 796
 797         /* TODO: take action based on particular interrupt */
 798         data->tmu_clear_irqs(data);
 799
 800         clk_disable(data->clk);
 801         mutex_unlock(&data->lock);
 802         enable_irq(data->irq);
 803 }
 804
 805 static void exynos4210_tmu_clear_irqs(struct exynos_tmu_data *data)
 806 {
 807         unsigned int val_irq;
 808         u32 tmu_intstat, tmu_intclear;
 809
 810         if (data->soc == SOC_ARCH_EXYNOS5260) {
 811                 tmu_intstat = EXYNOS5260_TMU_REG_INTSTAT;
 812                 tmu_intclear = EXYNOS5260_TMU_REG_INTCLEAR;
 813         } else if (data->soc == SOC_ARCH_EXYNOS7) {
 814                 tmu_intstat = EXYNOS7_TMU_REG_INTPEND;
 815                 tmu_intclear = EXYNOS7_TMU_REG_INTPEND;
 816         } else if (data->soc == SOC_ARCH_EXYNOS5433) {
 817                 tmu_intstat = EXYNOS5433_TMU_REG_INTPEND;
 818                 tmu_intclear = EXYNOS5433_TMU_REG_INTPEND;
 819         } else {
 820                 tmu_intstat = EXYNOS_TMU_REG_INTSTAT;
 821                 tmu_intclear = EXYNOS_TMU_REG_INTCLEAR;
 822         }
 823
 824         val_irq = readl(data->base + tmu_intstat);
 825         /*
 826          * Clear the interrupts.  Please note that the documentation for
 827          * Exynos3250, Exynos4412, Exynos5250 and Exynos5260 incorrectly
 828          * states that INTCLEAR register has a different placing of bits
 829          * responsible for FALL IRQs than INTSTAT register.  Exynos5420
 830          * and Exynos5440 documentation is correct (Exynos4210 doesn't
 831          * support FALL IRQs at all).
 832          */
 833         writel(val_irq, data->base + tmu_intclear);
 834 }
 835
 836 static irqreturn_t exynos_tmu_irq(int irq, void *id)
 837 {
 838         struct exynos_tmu_data *data = id;
 839
 840         disable_irq_nosync(irq);
 841         schedule_work(&data->irq_work);
 842
 843         return IRQ_HANDLED;
 844 }
 845
 846 static const struct of_device_id exynos_tmu_match[] = {
 847         {
 848                 .compatible = "samsung,exynos3250-tmu",
 849                 .data = (const void *)SOC_ARCH_EXYNOS3250,
 850         }, {
 851                 .compatible = "samsung,exynos4210-tmu",
 852                 .data = (const void *)SOC_ARCH_EXYNOS4210,
 853         }, {
 854                 .compatible = "samsung,exynos4412-tmu",
 855                 .data = (const void *)SOC_ARCH_EXYNOS4412,
 856         }, {
 857                 .compatible = "samsung,exynos5250-tmu",
 858                 .data = (const void *)SOC_ARCH_EXYNOS5250,
 859         }, {
 860                 .compatible = "samsung,exynos5260-tmu",
 861                 .data = (const void *)SOC_ARCH_EXYNOS5260,
 862         }, {
 863                 .compatible = "samsung,exynos5420-tmu",
 864                 .data = (const void *)SOC_ARCH_EXYNOS5420,
 865         }, {
 866                 .compatible = "samsung,exynos5420-tmu-ext-triminfo",
 867                 .data = (const void *)SOC_ARCH_EXYNOS5420_TRIMINFO,
 868         }, {
 869                 .compatible = "samsung,exynos5433-tmu",
 870                 .data = (const void *)SOC_ARCH_EXYNOS5433,
 871         }, {
 872                 .compatible = "samsung,exynos7-tmu",
 873                 .data = (const void *)SOC_ARCH_EXYNOS7,
 874         },
 875         { },
 876 };
 877 MODULE_DEVICE_TABLE(of, exynos_tmu_match);
 878
 879 static int exynos_map_dt_data(struct platform_device *pdev)
 880 {
 881         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
 882         struct resource res;
 883
 884         if (!data || !pdev->dev.of_node)
 885                 return -ENODEV;
 886
 887         data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
 888         if (data->id < 0)
 889                 data->id = 0;
 890
 891         data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
 892         if (data->irq <= 0) {
 893                 dev_err(&pdev->dev, "failed to get IRQ\n");
 894                 return -ENODEV;
 895         }
 896
 897         if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
 898                 dev_err(&pdev->dev, "failed to get Resource 0\n");
 899                 return -ENODEV;
 900         }
 901
 902         data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
 903         if (!data->base) {
 904                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
 905                 return -EADDRNOTAVAIL;
 906         }
 907
 908         data->soc = (enum soc_type)of_device_get_match_data(&pdev->dev);
 909
 910         switch (data->soc) {
 911         case SOC_ARCH_EXYNOS4210:
 912                 data->tmu_set_trip_temp = exynos4210_tmu_set_trip_temp;
 913                 data->tmu_set_trip_hyst = exynos4210_tmu_set_trip_hyst;
 914                 data->tmu_initialize = exynos4210_tmu_initialize;
 915                 data->tmu_control = exynos4210_tmu_control;
 916                 data->tmu_read = exynos4210_tmu_read;
 917                 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
 918                 data->ntrip = 4;
 919                 data->gain = 15;
 920                 data->reference_voltage = 7;
 921                 data->efuse_value = 55;
 922                 data->min_efuse_value = 40;
 923                 data->max_efuse_value = 100;
 924                 break;
 925         case SOC_ARCH_EXYNOS3250:
 926         case SOC_ARCH_EXYNOS4412:
 927         case SOC_ARCH_EXYNOS5250:
 928         case SOC_ARCH_EXYNOS5260:
 929         case SOC_ARCH_EXYNOS5420:
 930         case SOC_ARCH_EXYNOS5420_TRIMINFO:
 931                 data->tmu_set_trip_temp = exynos4412_tmu_set_trip_temp;
 932                 data->tmu_set_trip_hyst = exynos4412_tmu_set_trip_hyst;
 933                 data->tmu_initialize = exynos4412_tmu_initialize;
 934                 data->tmu_control = exynos4210_tmu_control;
 935                 data->tmu_read = exynos4412_tmu_read;
 936                 data->tmu_set_emulation = exynos4412_tmu_set_emulation;
 937                 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
 938                 data->ntrip = 4;
 939                 data->gain = 8;
 940                 data->reference_voltage = 16;
 941                 data->efuse_value = 55;
 942                 if (data->soc != SOC_ARCH_EXYNOS5420 &&
 943                     data->soc != SOC_ARCH_EXYNOS5420_TRIMINFO)
 944                         data->min_efuse_value = 40;
 945                 else
 946                         data->min_efuse_value = 0;
 947                 data->max_efuse_value = 100;
 948                 break;
 949         case SOC_ARCH_EXYNOS5433:
 950                 data->tmu_set_trip_temp = exynos5433_tmu_set_trip_temp;
 951                 data->tmu_set_trip_hyst = exynos5433_tmu_set_trip_hyst;
 952                 data->tmu_initialize = exynos5433_tmu_initialize;
 953                 data->tmu_control = exynos5433_tmu_control;
 954                 data->tmu_read = exynos4412_tmu_read;
 955                 data->tmu_set_emulation = exynos4412_tmu_set_emulation;
 956                 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
 957                 data->ntrip = 8;
 958                 data->gain = 8;
 959                 if (res.start == EXYNOS5433_G3D_BASE)
 960                         data->reference_voltage = 23;
 961                 else
 962                         data->reference_voltage = 16;
 963                 data->efuse_value = 75;
 964                 data->min_efuse_value = 40;
 965                 data->max_efuse_value = 150;
 966                 break;
 967         case SOC_ARCH_EXYNOS7:
 968                 data->tmu_set_trip_temp = exynos7_tmu_set_trip_temp;
 969                 data->tmu_set_trip_hyst = exynos7_tmu_set_trip_hyst;
 970                 data->tmu_initialize = exynos7_tmu_initialize;
 971                 data->tmu_control = exynos7_tmu_control;
 972                 data->tmu_read = exynos7_tmu_read;
 973                 data->tmu_set_emulation = exynos4412_tmu_set_emulation;
 974                 data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
 975                 data->ntrip = 8;
 976                 data->gain = 9;
 977                 data->reference_voltage = 17;
 978                 data->efuse_value = 75;
 979                 data->min_efuse_value = 15;
 980                 data->max_efuse_value = 100;
 981                 break;
 982         default:
 983                 dev_err(&pdev->dev, "Platform not supported\n");
 984                 return -EINVAL;
 985         }
 986
 987         data->cal_type = TYPE_ONE_POINT_TRIMMING;
 988
 989         /*
 990          * Check if the TMU shares some registers and then try to map the
 991          * memory of common registers.
 992          */
 993         if (data->soc != SOC_ARCH_EXYNOS5420_TRIMINFO)
 994                 return 0;
 995
 996         if (of_address_to_resource(pdev->dev.of_node, 1, &res)) {
 997                 dev_err(&pdev->dev, "failed to get Resource 1\n");
 998                 return -ENODEV;
 999         }
1000
1001         data->base_second = devm_ioremap(&pdev->dev, res.start,
1002                                         resource_size(&res));
1003         if (!data->base_second) {
1004                 dev_err(&pdev->dev, "Failed to ioremap memory\n");
1005                 return -ENOMEM;
1006         }
1007
1008         return 0;
1009 }
1010
1011 static const struct thermal_zone_of_device_ops exynos_sensor_ops = {
1012         .get_temp = exynos_get_temp,
1013         .set_emul_temp = exynos_tmu_set_emulation,
1014 };
1015
1016 static int exynos_tmu_probe(struct platform_device *pdev)
1017 {
1018         struct exynos_tmu_data *data;
1019         int ret;
1020
1021         data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
1022                                         GFP_KERNEL);
1023         if (!data)
1024                 return -ENOMEM;
1025
1026         platform_set_drvdata(pdev, data);
1027         mutex_init(&data->lock);
1028
1029         /*
1030          * Try enabling the regulator if found
1031          * TODO: Add regulator as an SOC feature, so that regulator enable
1032          * is a compulsory call.
1033          */
1034         data->regulator = devm_regulator_get_optional(&pdev->dev, "vtmu");
1035         if (!IS_ERR(data->regulator)) {
1036                 ret = regulator_enable(data->regulator);
1037                 if (ret) {
1038                         dev_err(&pdev->dev, "failed to enable vtmu\n");
1039                         return ret;
1040                 }
1041         } else {
1042                 if (PTR_ERR(data->regulator) == -EPROBE_DEFER)
1043                         return -EPROBE_DEFER;
1044                 dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
1045         }
1046
1047         ret = exynos_map_dt_data(pdev);
1048         if (ret)
1049                 goto err_sensor;
1050
1051         INIT_WORK(&data->irq_work, exynos_tmu_work);
1052
1053         data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
1054         if (IS_ERR(data->clk)) {
1055                 dev_err(&pdev->dev, "Failed to get clock\n");
1056                 ret = PTR_ERR(data->clk);
1057                 goto err_sensor;
1058         }
1059
1060         data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif");
1061         if (IS_ERR(data->clk_sec)) {
1062                 if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
1063                         dev_err(&pdev->dev, "Failed to get triminfo clock\n");
1064                         ret = PTR_ERR(data->clk_sec);
1065                         goto err_sensor;
1066                 }
1067         } else {
1068                 ret = clk_prepare(data->clk_sec);
1069                 if (ret) {
1070                         dev_err(&pdev->dev, "Failed to get clock\n");
1071                         goto err_sensor;
1072                 }
1073         }
1074
1075         ret = clk_prepare(data->clk);
1076         if (ret) {
1077                 dev_err(&pdev->dev, "Failed to get clock\n");
1078                 goto err_clk_sec;
1079         }
1080
1081         switch (data->soc) {
1082         case SOC_ARCH_EXYNOS5433:
1083         case SOC_ARCH_EXYNOS7:
1084                 data->sclk = devm_clk_get(&pdev->dev, "tmu_sclk");
1085                 if (IS_ERR(data->sclk)) {
1086                         dev_err(&pdev->dev, "Failed to get sclk\n");
1087                         goto err_clk;
1088                 } else {
1089                         ret = clk_prepare_enable(data->sclk);
1090                         if (ret) {
1091                                 dev_err(&pdev->dev, "Failed to enable sclk\n");
1092                                 goto err_clk;
1093                         }
1094                 }
1095                 break;
1096         default:
1097                 break;
1098         }
1099
1100         /*
1101          * data->tzd must be registered before calling exynos_tmu_initialize(),
1102          * requesting irq and calling exynos_tmu_control().
1103          */
1104         data->tzd = thermal_zone_of_sensor_register(&pdev->dev, 0, data,
1105                                                     &exynos_sensor_ops);
1106         if (IS_ERR(data->tzd)) {
1107                 ret = PTR_ERR(data->tzd);
1108                 dev_err(&pdev->dev, "Failed to register sensor: %d\n", ret);
1109                 goto err_sclk;
1110         }
1111
1112         ret = exynos_tmu_initialize(pdev);
1113         if (ret) {
1114                 dev_err(&pdev->dev, "Failed to initialize TMU\n");
1115                 goto err_thermal;
1116         }
1117
1118         ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
1119                 IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
1120         if (ret) {
1121                 dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
1122                 goto err_thermal;
1123         }
1124
1125         exynos_tmu_control(pdev, true);
1126         return 0;
1127
1128 err_thermal:
1129         thermal_zone_of_sensor_unregister(&pdev->dev, data->tzd);
1130 err_sclk:
1131         clk_disable_unprepare(data->sclk);
1132 err_clk:
1133         clk_unprepare(data->clk);
1134 err_clk_sec:
1135         if (!IS_ERR(data->clk_sec))
1136                 clk_unprepare(data->clk_sec);
1137 err_sensor:
1138         if (!IS_ERR(data->regulator))
1139                 regulator_disable(data->regulator);
1140
1141         return ret;
1142 }
1143
1144 static int exynos_tmu_remove(struct platform_device *pdev)
1145 {
1146         struct exynos_tmu_data *data = platform_get_drvdata(pdev);
1147         struct thermal_zone_device *tzd = data->tzd;
1148
1149         thermal_zone_of_sensor_unregister(&pdev->dev, tzd);
1150         exynos_tmu_control(pdev, false);
1151
1152         clk_disable_unprepare(data->sclk);
1153         clk_unprepare(data->clk);
1154         if (!IS_ERR(data->clk_sec))
1155                 clk_unprepare(data->clk_sec);
1156
1157         if (!IS_ERR(data->regulator))
1158                 regulator_disable(data->regulator);
1159
1160         return 0;
1161 }
1162
1163 #ifdef CONFIG_PM_SLEEP
1164 static int exynos_tmu_suspend(struct device *dev)
1165 {
1166         exynos_tmu_control(to_platform_device(dev), false);
1167
1168         return 0;
1169 }
1170
1171 static int exynos_tmu_resume(struct device *dev)
1172 {
1173         struct platform_device *pdev = to_platform_device(dev);
1174
1175         exynos_tmu_initialize(pdev);
1176         exynos_tmu_control(pdev, true);
1177
1178         return 0;
1179 }
1180
1181 static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
1182                          exynos_tmu_suspend, exynos_tmu_resume);
1183 #define EXYNOS_TMU_PM   (&exynos_tmu_pm)
1184 #else
1185 #define EXYNOS_TMU_PM   NULL
1186 #endif
1187
1188 static struct platform_driver exynos_tmu_driver = {
1189         .driver = {
1190                 .name   = "exynos-tmu",
1191                 .pm     = EXYNOS_TMU_PM,
1192                 .of_match_table = exynos_tmu_match,
1193         },
1194         .probe = exynos_tmu_probe,
1195         .remove = exynos_tmu_remove,
1196 };
1197
1198 module_platform_driver(exynos_tmu_driver);
1199
1200 MODULE_DESCRIPTION("EXYNOS TMU Driver");
1201 MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
1202 MODULE_LICENSE("GPL");
1203 MODULE_ALIAS("platform:exynos-tmu");