drivers/thermal/rockchip_thermal.c

   1 /*
   2  * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
   3  *
   4  * Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd
   5  * Caesar Wang <wxt@rock-chips.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms and conditions of the GNU General Public License,
   9  * version 2, as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  */
  16
  17 #include <linux/clk.h>
  18 #include <linux/delay.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/io.h>
  21 #include <linux/module.h>
  22 #include <linux/of.h>
  23 #include <linux/of_address.h>
  24 #include <linux/of_irq.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/reset.h>
  27 #include <linux/thermal.h>
  28 #include <linux/pinctrl/consumer.h>
  29
  30 /**
  31  * If the temperature over a period of time High,
  32  * the resulting TSHUT gave CRU module,let it reset the entire chip,
  33  * or via GPIO give PMIC.
  34  */
  35 enum tshut_mode {
  36         TSHUT_MODE_CRU = 0,
  37         TSHUT_MODE_GPIO,
  38 };
  39
  40 /**
  41  * the system Temperature Sensors tshut(tshut) polarity
  42  * the bit 8 is tshut polarity.
  43  * 0: low active, 1: high active
  44  */
  45 enum tshut_polarity {
  46         TSHUT_LOW_ACTIVE = 0,
  47         TSHUT_HIGH_ACTIVE,
  48 };
  49
  50 /**
  51  * The system has two Temperature Sensors.
  52  * sensor0 is for CPU, and sensor1 is for GPU.
  53  */
  54 enum sensor_id {
  55         SENSOR_CPU = 0,
  56         SENSOR_GPU,
  57 };
  58
  59 /**
  60 * The conversion table has the adc value and temperature.
  61 * ADC_DECREMENT is the adc value decremnet.(e.g. v2_code_table)
  62 * ADC_INCREMNET is the adc value incremnet.(e.g. v3_code_table)
  63 */
  64 enum adc_sort_mode {
  65         ADC_DECREMENT = 0,
  66         ADC_INCREMENT,
  67 };
  68
  69 /**
  70  * The max sensors is two in rockchip SoCs.
  71  * Two sensors: CPU and GPU sensor.
  72  */
  73 #define SOC_MAX_SENSORS 2
  74
  75 struct chip_tsadc_table {
  76         const struct tsadc_table *id;
  77
  78         /* the array table size*/
  79         unsigned int length;
  80
  81         /* that analogic mask data */
  82         u32 data_mask;
  83
  84         /* the sort mode is adc value that increment or decrement in table */
  85         enum adc_sort_mode mode;
  86 };
  87
  88 struct rockchip_tsadc_chip {
  89         /* The sensor id of chip correspond to the ADC channel */
  90         int chn_id[SOC_MAX_SENSORS];
  91         int chn_num;
  92
  93         /* The hardware-controlled tshut property */
  94         int tshut_temp;
  95         enum tshut_mode tshut_mode;
  96         enum tshut_polarity tshut_polarity;
  97
  98         /* Chip-wide methods */
  99         void (*initialize)(void __iomem *reg, enum tshut_polarity p);
 100         void (*irq_ack)(void __iomem *reg);
 101         void (*control)(void __iomem *reg, bool on);
 102
 103         /* Per-sensor methods */
 104         int (*get_temp)(struct chip_tsadc_table table,
 105                         int chn, void __iomem *reg, int *temp);
 106         void (*set_tshut_temp)(struct chip_tsadc_table table,
 107                                int chn, void __iomem *reg, int temp);
 108         void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
 109
 110         /* Per-table methods */
 111         struct chip_tsadc_table table;
 112 };
 113
 114 struct rockchip_thermal_sensor {
 115         struct rockchip_thermal_data *thermal;
 116         struct thermal_zone_device *tzd;
 117         int id;
 118 };
 119
 120 struct rockchip_thermal_data {
 121         const struct rockchip_tsadc_chip *chip;
 122         struct platform_device *pdev;
 123         struct reset_control *reset;
 124
 125         struct rockchip_thermal_sensor sensors[SOC_MAX_SENSORS];
 126
 127         struct clk *clk;
 128         struct clk *pclk;
 129
 130         void __iomem *regs;
 131
 132         int tshut_temp;
 133         enum tshut_mode tshut_mode;
 134         enum tshut_polarity tshut_polarity;
 135 };
 136
 137 /* TSADC Sensor info define: */
 138 #define TSADCV2_AUTO_CON                        0x04
 139 #define TSADCV2_INT_EN                          0x08
 140 #define TSADCV2_INT_PD                          0x0c
 141 #define TSADCV2_DATA(chn)                       (0x20 + (chn) * 0x04)
 142 #define TSADCV2_COMP_SHUT(chn)                  (0x40 + (chn) * 0x04)
 143 #define TSADCV2_HIGHT_INT_DEBOUNCE              0x60
 144 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE            0x64
 145 #define TSADCV2_AUTO_PERIOD                     0x68
 146 #define TSADCV2_AUTO_PERIOD_HT                  0x6c
 147
 148 #define TSADCV2_AUTO_EN                         BIT(0)
 149 #define TSADCV2_AUTO_SRC_EN(chn)                BIT(4 + (chn))
 150 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH        BIT(8)
 151
 152 #define TSADCV2_INT_SRC_EN(chn)                 BIT(chn)
 153 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn)          BIT(4 + (chn))
 154 #define TSADCV2_SHUT_2CRU_SRC_EN(chn)           BIT(8 + (chn))
 155
 156 #define TSADCV2_INT_PD_CLEAR_MASK               ~BIT(8)
 157
 158 #define TSADCV2_DATA_MASK                       0xfff
 159 #define TSADCV3_DATA_MASK                       0x3ff
 160
 161 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT        4
 162 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT      4
 163 #define TSADCV2_AUTO_PERIOD_TIME                250 /* msec */
 164 #define TSADCV2_AUTO_PERIOD_HT_TIME             50  /* msec */
 165
 166 struct tsadc_table {
 167         u32 code;
 168         int temp;
 169 };
 170
 171 static const struct tsadc_table v2_code_table[] = {
 172         {TSADCV2_DATA_MASK, -40000},
 173         {3800, -40000},
 174         {3792, -35000},
 175         {3783, -30000},
 176         {3774, -25000},
 177         {3765, -20000},
 178         {3756, -15000},
 179         {3747, -10000},
 180         {3737, -5000},
 181         {3728, 0},
 182         {3718, 5000},
 183         {3708, 10000},
 184         {3698, 15000},
 185         {3688, 20000},
 186         {3678, 25000},
 187         {3667, 30000},
 188         {3656, 35000},
 189         {3645, 40000},
 190         {3634, 45000},
 191         {3623, 50000},
 192         {3611, 55000},
 193         {3600, 60000},
 194         {3588, 65000},
 195         {3575, 70000},
 196         {3563, 75000},
 197         {3550, 80000},
 198         {3537, 85000},
 199         {3524, 90000},
 200         {3510, 95000},
 201         {3496, 100000},
 202         {3482, 105000},
 203         {3467, 110000},
 204         {3452, 115000},
 205         {3437, 120000},
 206         {3421, 125000},
 207 };
 208
 209 static const struct tsadc_table v3_code_table[] = {
 210         {0, -40000},
 211         {106, -40000},
 212         {108, -35000},
 213         {110, -30000},
 214         {112, -25000},
 215         {114, -20000},
 216         {116, -15000},
 217         {118, -10000},
 218         {120, -5000},
 219         {122, 0},
 220         {124, 5000},
 221         {126, 10000},
 222         {128, 15000},
 223         {130, 20000},
 224         {132, 25000},
 225         {134, 30000},
 226         {136, 35000},
 227         {138, 40000},
 228         {140, 45000},
 229         {142, 50000},
 230         {144, 55000},
 231         {146, 60000},
 232         {148, 65000},
 233         {150, 70000},
 234         {152, 75000},
 235         {154, 80000},
 236         {156, 85000},
 237         {158, 90000},
 238         {160, 95000},
 239         {162, 100000},
 240         {163, 105000},
 241         {165, 110000},
 242         {167, 115000},
 243         {169, 120000},
 244         {171, 125000},
 245         {TSADCV3_DATA_MASK, 125000},
 246 };
 247
 248 static u32 rk_tsadcv2_temp_to_code(struct chip_tsadc_table table,
 249                                    int temp)
 250 {
 251         int high, low, mid;
 252
 253         low = 0;
 254         high = table.length - 1;
 255         mid = (high + low) / 2;
 256
 257         if (temp < table.id[low].temp || temp > table.id[high].temp)
 258                 return 0;
 259
 260         while (low <= high) {
 261                 if (temp == table.id[mid].temp)
 262                         return table.id[mid].code;
 263                 else if (temp < table.id[mid].temp)
 264                         high = mid - 1;
 265                 else
 266                         low = mid + 1;
 267                 mid = (low + high) / 2;
 268         }
 269
 270         return 0;
 271 }
 272
 273 static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
 274                                    int *temp)
 275 {
 276         unsigned int low = 1;
 277         unsigned int high = table.length - 1;
 278         unsigned int mid = (low + high) / 2;
 279         unsigned int num;
 280         unsigned long denom;
 281
 282         WARN_ON(table.length < 2);
 283
 284         switch (table.mode) {
 285         case ADC_DECREMENT:
 286                 code &= table.data_mask;
 287                 if (code < table.id[high].code)
 288                         return -EAGAIN;         /* Incorrect reading */
 289
 290                 while (low <= high) {
 291                         if (code >= table.id[mid].code &&
 292                             code < table.id[mid - 1].code)
 293                                 break;
 294                         else if (code < table.id[mid].code)
 295                                 low = mid + 1;
 296                         else
 297                                 high = mid - 1;
 298
 299                         mid = (low + high) / 2;
 300                 }
 301                 break;
 302         case ADC_INCREMENT:
 303                 code &= table.data_mask;
 304                 if (code < table.id[low].code)
 305                         return -EAGAIN;         /* Incorrect reading */
 306
 307                 while (low <= high) {
 308                         if (code >= table.id[mid - 1].code &&
 309                             code < table.id[mid].code)
 310                                 break;
 311                         else if (code > table.id[mid].code)
 312                                 low = mid + 1;
 313                         else
 314                                 high = mid - 1;
 315
 316                         mid = (low + high) / 2;
 317                 }
 318                 break;
 319         default:
 320                 pr_err("Invalid the conversion table\n");
 321         }
 322
 323         /*
 324          * The 5C granularity provided by the table is too much. Let's
 325          * assume that the relationship between sensor readings and
 326          * temperature between 2 table entries is linear and interpolate
 327          * to produce less granular result.
 328          */
 329         num = table.id[mid].temp - v2_code_table[mid - 1].temp;
 330         num *= abs(table.id[mid - 1].code - code);
 331         denom = abs(table.id[mid - 1].code - table.id[mid].code);
 332         *temp = table.id[mid - 1].temp + (num / denom);
 333
 334         return 0;
 335 }
 336
 337 /**
 338  * rk_tsadcv2_initialize - initialize TASDC Controller.
 339  *
 340  * (1) Set TSADC_V2_AUTO_PERIOD:
 341  *     Configure the interleave between every two accessing of
 342  *     TSADC in normal operation.
 343  *
 344  * (2) Set TSADCV2_AUTO_PERIOD_HT:
 345  *     Configure the interleave between every two accessing of
 346  *     TSADC after the temperature is higher than COM_SHUT or COM_INT.
 347  *
 348  * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE:
 349  *     If the temperature is higher than COMP_INT or COMP_SHUT for
 350  *     "debounce" times, TSADC controller will generate interrupt or TSHUT.
 351  */
 352 static void rk_tsadcv2_initialize(void __iomem *regs,
 353                                   enum tshut_polarity tshut_polarity)
 354 {
 355         if (tshut_polarity == TSHUT_HIGH_ACTIVE)
 356                 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 357                                regs + TSADCV2_AUTO_CON);
 358         else
 359                 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 360                                regs + TSADCV2_AUTO_CON);
 361
 362         writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
 363         writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
 364                        regs + TSADCV2_HIGHT_INT_DEBOUNCE);
 365         writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
 366                        regs + TSADCV2_AUTO_PERIOD_HT);
 367         writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
 368                        regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
 369 }
 370
 371 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 372 {
 373         u32 val;
 374
 375         val = readl_relaxed(regs + TSADCV2_INT_PD);
 376         writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
 377 }
 378
 379 static void rk_tsadcv2_control(void __iomem *regs, bool enable)
 380 {
 381         u32 val;
 382
 383         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 384         if (enable)
 385                 val |= TSADCV2_AUTO_EN;
 386         else
 387                 val &= ~TSADCV2_AUTO_EN;
 388
 389         writel_relaxed(val, regs + TSADCV2_AUTO_CON);
 390 }
 391
 392 static int rk_tsadcv2_get_temp(struct chip_tsadc_table table,
 393                                int chn, void __iomem *regs, int *temp)
 394 {
 395         u32 val;
 396
 397         val = readl_relaxed(regs + TSADCV2_DATA(chn));
 398
 399         return rk_tsadcv2_code_to_temp(table, val, temp);
 400 }
 401
 402 static void rk_tsadcv2_tshut_temp(struct chip_tsadc_table table,
 403                                   int chn, void __iomem *regs, int temp)
 404 {
 405         u32 tshut_value, val;
 406
 407         tshut_value = rk_tsadcv2_temp_to_code(table, temp);
 408         writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
 409
 410         /* TSHUT will be valid */
 411         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 412         writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
 413 }
 414
 415 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
 416                                   enum tshut_mode mode)
 417 {
 418         u32 val;
 419
 420         val = readl_relaxed(regs + TSADCV2_INT_EN);
 421         if (mode == TSHUT_MODE_GPIO) {
 422                 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
 423                 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 424         } else {
 425                 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 426                 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
 427         }
 428
 429         writel_relaxed(val, regs + TSADCV2_INT_EN);
 430 }
 431
 432 static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
 433         .chn_id[SENSOR_CPU] = 1, /* cpu sensor is channel 1 */
 434         .chn_id[SENSOR_GPU] = 2, /* gpu sensor is channel 2 */
 435         .chn_num = 2, /* two channels for tsadc */
 436
 437         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 438         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 439         .tshut_temp = 95000,
 440
 441         .initialize = rk_tsadcv2_initialize,
 442         .irq_ack = rk_tsadcv2_irq_ack,
 443         .control = rk_tsadcv2_control,
 444         .get_temp = rk_tsadcv2_get_temp,
 445         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 446         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 447
 448         .table = {
 449                 .id = v2_code_table,
 450                 .length = ARRAY_SIZE(v2_code_table),
 451                 .data_mask = TSADCV2_DATA_MASK,
 452                 .mode = ADC_DECREMENT,
 453         },
 454 };
 455
 456 static const struct rockchip_tsadc_chip rk3368_tsadc_data = {
 457         .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
 458         .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
 459         .chn_num = 2, /* two channels for tsadc */
 460
 461         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 462         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 463         .tshut_temp = 95000,
 464
 465         .initialize = rk_tsadcv2_initialize,
 466         .irq_ack = rk_tsadcv2_irq_ack,
 467         .control = rk_tsadcv2_control,
 468         .get_temp = rk_tsadcv2_get_temp,
 469         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 470         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 471
 472         .table = {
 473                 .id = v3_code_table,
 474                 .length = ARRAY_SIZE(v3_code_table),
 475                 .data_mask = TSADCV3_DATA_MASK,
 476                 .mode = ADC_INCREMENT,
 477         },
 478 };
 479
 480 static const struct of_device_id of_rockchip_thermal_match[] = {
 481         {
 482                 .compatible = "rockchip,rk3288-tsadc",
 483                 .data = (void *)&rk3288_tsadc_data,
 484         },
 485         {
 486                 .compatible = "rockchip,rk3368-tsadc",
 487                 .data = (void *)&rk3368_tsadc_data,
 488         },
 489         { /* end */ },
 490 };
 491 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
 492
 493 static void
 494 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
 495 {
 496         struct thermal_zone_device *tzd = sensor->tzd;
 497
 498         tzd->ops->set_mode(tzd,
 499                 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
 500 }
 501
 502 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
 503 {
 504         struct rockchip_thermal_data *thermal = dev;
 505         int i;
 506
 507         dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
 508
 509         thermal->chip->irq_ack(thermal->regs);
 510
 511         for (i = 0; i < thermal->chip->chn_num; i++)
 512                 thermal_zone_device_update(thermal->sensors[i].tzd);
 513
 514         return IRQ_HANDLED;
 515 }
 516
 517 static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
 518 {
 519         struct rockchip_thermal_sensor *sensor = _sensor;
 520         struct rockchip_thermal_data *thermal = sensor->thermal;
 521         const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
 522         int retval;
 523
 524         retval = tsadc->get_temp(tsadc->table,
 525                                  sensor->id, thermal->regs, out_temp);
 526         dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
 527                 sensor->id, *out_temp, retval);
 528
 529         return retval;
 530 }
 531
 532 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
 533         .get_temp = rockchip_thermal_get_temp,
 534 };
 535
 536 static int rockchip_configure_from_dt(struct device *dev,
 537                                       struct device_node *np,
 538                                       struct rockchip_thermal_data *thermal)
 539 {
 540         u32 shut_temp, tshut_mode, tshut_polarity;
 541
 542         if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
 543                 dev_warn(dev,
 544                          "Missing tshut temp property, using default %d\n",
 545                          thermal->chip->tshut_temp);
 546                 thermal->tshut_temp = thermal->chip->tshut_temp;
 547         } else {
 548                 if (shut_temp > INT_MAX) {
 549                         dev_err(dev, "Invalid tshut temperature specified: %d\n",
 550                                 shut_temp);
 551                         return -ERANGE;
 552                 }
 553                 thermal->tshut_temp = shut_temp;
 554         }
 555
 556         if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
 557                 dev_warn(dev,
 558                          "Missing tshut mode property, using default (%s)\n",
 559                          thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
 560                                 "gpio" : "cru");
 561                 thermal->tshut_mode = thermal->chip->tshut_mode;
 562         } else {
 563                 thermal->tshut_mode = tshut_mode;
 564         }
 565
 566         if (thermal->tshut_mode > 1) {
 567                 dev_err(dev, "Invalid tshut mode specified: %d\n",
 568                         thermal->tshut_mode);
 569                 return -EINVAL;
 570         }
 571
 572         if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
 573                                  &tshut_polarity)) {
 574                 dev_warn(dev,
 575                          "Missing tshut-polarity property, using default (%s)\n",
 576                          thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
 577                                 "low" : "high");
 578                 thermal->tshut_polarity = thermal->chip->tshut_polarity;
 579         } else {
 580                 thermal->tshut_polarity = tshut_polarity;
 581         }
 582
 583         if (thermal->tshut_polarity > 1) {
 584                 dev_err(dev, "Invalid tshut-polarity specified: %d\n",
 585                         thermal->tshut_polarity);
 586                 return -EINVAL;
 587         }
 588
 589         return 0;
 590 }
 591
 592 static int
 593 rockchip_thermal_register_sensor(struct platform_device *pdev,
 594                                  struct rockchip_thermal_data *thermal,
 595                                  struct rockchip_thermal_sensor *sensor,
 596                                  int id)
 597 {
 598         const struct rockchip_tsadc_chip *tsadc = thermal->chip;
 599         int error;
 600
 601         tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
 602         tsadc->set_tshut_temp(tsadc->table, id, thermal->regs,
 603                               thermal->tshut_temp);
 604
 605         sensor->thermal = thermal;
 606         sensor->id = id;
 607         sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
 608                                                       &rockchip_of_thermal_ops);
 609         if (IS_ERR(sensor->tzd)) {
 610                 error = PTR_ERR(sensor->tzd);
 611                 dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
 612                         id, error);
 613                 return error;
 614         }
 615
 616         return 0;
 617 }
 618
 619 /*
 620  * Reset TSADC Controller, reset all tsadc registers.
 621  */
 622 static void rockchip_thermal_reset_controller(struct reset_control *reset)
 623 {
 624         reset_control_assert(reset);
 625         usleep_range(10, 20);
 626         reset_control_deassert(reset);
 627 }
 628
 629 static int rockchip_thermal_probe(struct platform_device *pdev)
 630 {
 631         struct device_node *np = pdev->dev.of_node;
 632         struct rockchip_thermal_data *thermal;
 633         const struct of_device_id *match;
 634         struct resource *res;
 635         int irq;
 636         int i, j;
 637         int error;
 638
 639         match = of_match_node(of_rockchip_thermal_match, np);
 640         if (!match)
 641                 return -ENXIO;
 642
 643         irq = platform_get_irq(pdev, 0);
 644         if (irq < 0) {
 645                 dev_err(&pdev->dev, "no irq resource?\n");
 646                 return -EINVAL;
 647         }
 648
 649         thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
 650                                GFP_KERNEL);
 651         if (!thermal)
 652                 return -ENOMEM;
 653
 654         thermal->pdev = pdev;
 655
 656         thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
 657         if (!thermal->chip)
 658                 return -EINVAL;
 659
 660         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 661         thermal->regs = devm_ioremap_resource(&pdev->dev, res);
 662         if (IS_ERR(thermal->regs))
 663                 return PTR_ERR(thermal->regs);
 664
 665         thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
 666         if (IS_ERR(thermal->reset)) {
 667                 error = PTR_ERR(thermal->reset);
 668                 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
 669                 return error;
 670         }
 671
 672         thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
 673         if (IS_ERR(thermal->clk)) {
 674                 error = PTR_ERR(thermal->clk);
 675                 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
 676                 return error;
 677         }
 678
 679         thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
 680         if (IS_ERR(thermal->pclk)) {
 681                 error = PTR_ERR(thermal->pclk);
 682                 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
 683                         error);
 684                 return error;
 685         }
 686
 687         error = clk_prepare_enable(thermal->clk);
 688         if (error) {
 689                 dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
 690                         error);
 691                 return error;
 692         }
 693
 694         error = clk_prepare_enable(thermal->pclk);
 695         if (error) {
 696                 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
 697                 goto err_disable_clk;
 698         }
 699
 700         rockchip_thermal_reset_controller(thermal->reset);
 701
 702         error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
 703         if (error) {
 704                 dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
 705                         error);
 706                 goto err_disable_pclk;
 707         }
 708
 709         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 710
 711         for (i = 0; i < thermal->chip->chn_num; i++) {
 712                 error = rockchip_thermal_register_sensor(pdev, thermal,
 713                                                 &thermal->sensors[i],
 714                                                 thermal->chip->chn_id[i]);
 715                 if (error) {
 716                         dev_err(&pdev->dev,
 717                                 "failed to register sensor[%d] : error = %d\n",
 718                                 i, error);
 719                         for (j = 0; j < i; j++)
 720                                 thermal_zone_of_sensor_unregister(&pdev->dev,
 721                                                 thermal->sensors[j].tzd);
 722                         goto err_disable_pclk;
 723                 }
 724         }
 725
 726         error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 727                                           &rockchip_thermal_alarm_irq_thread,
 728                                           IRQF_ONESHOT,
 729                                           "rockchip_thermal", thermal);
 730         if (error) {
 731                 dev_err(&pdev->dev,
 732                         "failed to request tsadc irq: %d\n", error);
 733                 goto err_unregister_sensor;
 734         }
 735
 736         thermal->chip->control(thermal->regs, true);
 737
 738         for (i = 0; i < thermal->chip->chn_num; i++)
 739                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 740
 741         platform_set_drvdata(pdev, thermal);
 742
 743         return 0;
 744
 745 err_unregister_sensor:
 746         while (i--)
 747                 thermal_zone_of_sensor_unregister(&pdev->dev,
 748                                                   thermal->sensors[i].tzd);
 749
 750 err_disable_pclk:
 751         clk_disable_unprepare(thermal->pclk);
 752 err_disable_clk:
 753         clk_disable_unprepare(thermal->clk);
 754
 755         return error;
 756 }
 757
 758 static int rockchip_thermal_remove(struct platform_device *pdev)
 759 {
 760         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 761         int i;
 762
 763         for (i = 0; i < thermal->chip->chn_num; i++) {
 764                 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
 765
 766                 rockchip_thermal_toggle_sensor(sensor, false);
 767                 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
 768         }
 769
 770         thermal->chip->control(thermal->regs, false);
 771
 772         clk_disable_unprepare(thermal->pclk);
 773         clk_disable_unprepare(thermal->clk);
 774
 775         return 0;
 776 }
 777
 778 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 779 {
 780         struct platform_device *pdev = to_platform_device(dev);
 781         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 782         int i;
 783
 784         for (i = 0; i < thermal->chip->chn_num; i++)
 785                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
 786
 787         thermal->chip->control(thermal->regs, false);
 788
 789         clk_disable(thermal->pclk);
 790         clk_disable(thermal->clk);
 791
 792         pinctrl_pm_select_sleep_state(dev);
 793
 794         return 0;
 795 }
 796
 797 static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 798 {
 799         struct platform_device *pdev = to_platform_device(dev);
 800         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 801         int i;
 802         int error;
 803
 804         error = clk_enable(thermal->clk);
 805         if (error)
 806                 return error;
 807
 808         error = clk_enable(thermal->pclk);
 809         if (error)
 810                 return error;
 811
 812         rockchip_thermal_reset_controller(thermal->reset);
 813
 814         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 815
 816         for (i = 0; i < thermal->chip->chn_num; i++) {
 817                 int id = thermal->sensors[i].id;
 818
 819                 thermal->chip->set_tshut_mode(id, thermal->regs,
 820                                               thermal->tshut_mode);
 821                 thermal->chip->set_tshut_temp(thermal->chip->table,
 822                                               id, thermal->regs,
 823                                               thermal->tshut_temp);
 824         }
 825
 826         thermal->chip->control(thermal->regs, true);
 827
 828         for (i = 0; i < thermal->chip->chn_num; i++)
 829                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 830
 831         pinctrl_pm_select_default_state(dev);
 832
 833         return 0;
 834 }
 835
 836 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
 837                          rockchip_thermal_suspend, rockchip_thermal_resume);
 838
 839 static struct platform_driver rockchip_thermal_driver = {
 840         .driver = {
 841                 .name = "rockchip-thermal",
 842                 .pm = &rockchip_thermal_pm_ops,
 843                 .of_match_table = of_rockchip_thermal_match,
 844         },
 845         .probe = rockchip_thermal_probe,
 846         .remove = rockchip_thermal_remove,
 847 };
 848
 849 module_platform_driver(rockchip_thermal_driver);
 850
 851 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
 852 MODULE_AUTHOR("Rockchip, Inc.");
 853 MODULE_LICENSE("GPL v2");
 854 MODULE_ALIAS("platform:rockchip-thermal");