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: the adc value is of diminishing.(e.g. v2_code_table)
  62  * ADC_INCREMENT: the adc value is incremental.(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 /**
  76  * struct chip_tsadc_table: hold information about chip-specific differences
  77  * @id: conversion table
  78  * @length: size of conversion table
  79  * @data_mask: mask to apply on data inputs
  80  * @mode: sort mode of this adc variant (incrementing or decrementing)
  81  */
  82 struct chip_tsadc_table {
  83         const struct tsadc_table *id;
  84         unsigned int length;
  85         u32 data_mask;
  86         enum adc_sort_mode mode;
  87 };
  88
  89 struct rockchip_tsadc_chip {
  90         /* The sensor id of chip correspond to the ADC channel */
  91         int chn_id[SOC_MAX_SENSORS];
  92         int chn_num;
  93
  94         /* The hardware-controlled tshut property */
  95         int tshut_temp;
  96         enum tshut_mode tshut_mode;
  97         enum tshut_polarity tshut_polarity;
  98
  99         /* Chip-wide methods */
 100         void (*initialize)(void __iomem *reg, enum tshut_polarity p);
 101         void (*irq_ack)(void __iomem *reg);
 102         void (*control)(void __iomem *reg, bool on);
 103
 104         /* Per-sensor methods */
 105         int (*get_temp)(struct chip_tsadc_table table,
 106                         int chn, void __iomem *reg, int *temp);
 107         void (*set_tshut_temp)(struct chip_tsadc_table table,
 108                                int chn, void __iomem *reg, int temp);
 109         void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
 110
 111         /* Per-table methods */
 112         struct chip_tsadc_table table;
 113 };
 114
 115 struct rockchip_thermal_sensor {
 116         struct rockchip_thermal_data *thermal;
 117         struct thermal_zone_device *tzd;
 118         int id;
 119 };
 120
 121 struct rockchip_thermal_data {
 122         const struct rockchip_tsadc_chip *chip;
 123         struct platform_device *pdev;
 124         struct reset_control *reset;
 125
 126         struct rockchip_thermal_sensor sensors[SOC_MAX_SENSORS];
 127
 128         struct clk *clk;
 129         struct clk *pclk;
 130
 131         void __iomem *regs;
 132
 133         int tshut_temp;
 134         enum tshut_mode tshut_mode;
 135         enum tshut_polarity tshut_polarity;
 136 };
 137
 138 /* TSADC Sensor info define: */
 139 #define TSADCV2_AUTO_CON                        0x04
 140 #define TSADCV2_INT_EN                          0x08
 141 #define TSADCV2_INT_PD                          0x0c
 142 #define TSADCV2_DATA(chn)                       (0x20 + (chn) * 0x04)
 143 #define TSADCV2_COMP_SHUT(chn)                  (0x40 + (chn) * 0x04)
 144 #define TSADCV2_HIGHT_INT_DEBOUNCE              0x60
 145 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE            0x64
 146 #define TSADCV2_AUTO_PERIOD                     0x68
 147 #define TSADCV2_AUTO_PERIOD_HT                  0x6c
 148
 149 #define TSADCV2_AUTO_EN                         BIT(0)
 150 #define TSADCV2_AUTO_SRC_EN(chn)                BIT(4 + (chn))
 151 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH        BIT(8)
 152
 153 #define TSADCV2_INT_SRC_EN(chn)                 BIT(chn)
 154 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn)          BIT(4 + (chn))
 155 #define TSADCV2_SHUT_2CRU_SRC_EN(chn)           BIT(8 + (chn))
 156
 157 #define TSADCV1_INT_PD_CLEAR_MASK               ~BIT(16)
 158 #define TSADCV2_INT_PD_CLEAR_MASK               ~BIT(8)
 159
 160 #define TSADCV2_DATA_MASK                       0xfff
 161 #define TSADCV3_DATA_MASK                       0x3ff
 162
 163 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT        4
 164 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT      4
 165 #define TSADCV2_AUTO_PERIOD_TIME                250 /* msec */
 166 #define TSADCV2_AUTO_PERIOD_HT_TIME             50  /* msec */
 167
 168 struct tsadc_table {
 169         u32 code;
 170         int temp;
 171 };
 172
 173 /**
 174  * Note:
 175  * Code to Temperature mapping of the Temperature sensor is a piece wise linear
 176  * curve.Any temperature, code faling between to 2 give temperatures can be
 177  * linearly interpolated.
 178  * Code to Temperature mapping should be updated based on sillcon results.
 179  */
 180 static const struct tsadc_table v1_code_table[] = {
 181         {TSADCV3_DATA_MASK, -40000},
 182         {436, -40000},
 183         {431, -35000},
 184         {426, -30000},
 185         {421, -25000},
 186         {416, -20000},
 187         {411, -15000},
 188         {406, -10000},
 189         {401, -5000},
 190         {395, 0},
 191         {390, 5000},
 192         {385, 10000},
 193         {380, 15000},
 194         {375, 20000},
 195         {370, 25000},
 196         {364, 30000},
 197         {359, 35000},
 198         {354, 40000},
 199         {349, 45000},
 200         {343, 50000},
 201         {338, 55000},
 202         {333, 60000},
 203         {328, 65000},
 204         {322, 70000},
 205         {317, 75000},
 206         {312, 80000},
 207         {307, 85000},
 208         {301, 90000},
 209         {296, 95000},
 210         {291, 100000},
 211         {286, 105000},
 212         {280, 110000},
 213         {275, 115000},
 214         {270, 120000},
 215         {264, 125000},
 216 };
 217
 218 static const struct tsadc_table v2_code_table[] = {
 219         {TSADCV2_DATA_MASK, -40000},
 220         {3800, -40000},
 221         {3792, -35000},
 222         {3783, -30000},
 223         {3774, -25000},
 224         {3765, -20000},
 225         {3756, -15000},
 226         {3747, -10000},
 227         {3737, -5000},
 228         {3728, 0},
 229         {3718, 5000},
 230         {3708, 10000},
 231         {3698, 15000},
 232         {3688, 20000},
 233         {3678, 25000},
 234         {3667, 30000},
 235         {3656, 35000},
 236         {3645, 40000},
 237         {3634, 45000},
 238         {3623, 50000},
 239         {3611, 55000},
 240         {3600, 60000},
 241         {3588, 65000},
 242         {3575, 70000},
 243         {3563, 75000},
 244         {3550, 80000},
 245         {3537, 85000},
 246         {3524, 90000},
 247         {3510, 95000},
 248         {3496, 100000},
 249         {3482, 105000},
 250         {3467, 110000},
 251         {3452, 115000},
 252         {3437, 120000},
 253         {3421, 125000},
 254 };
 255
 256 static const struct tsadc_table v3_code_table[] = {
 257         {0, -40000},
 258         {106, -40000},
 259         {108, -35000},
 260         {110, -30000},
 261         {112, -25000},
 262         {114, -20000},
 263         {116, -15000},
 264         {118, -10000},
 265         {120, -5000},
 266         {122, 0},
 267         {124, 5000},
 268         {126, 10000},
 269         {128, 15000},
 270         {130, 20000},
 271         {132, 25000},
 272         {134, 30000},
 273         {136, 35000},
 274         {138, 40000},
 275         {140, 45000},
 276         {142, 50000},
 277         {144, 55000},
 278         {146, 60000},
 279         {148, 65000},
 280         {150, 70000},
 281         {152, 75000},
 282         {154, 80000},
 283         {156, 85000},
 284         {158, 90000},
 285         {160, 95000},
 286         {162, 100000},
 287         {163, 105000},
 288         {165, 110000},
 289         {167, 115000},
 290         {169, 120000},
 291         {171, 125000},
 292         {TSADCV3_DATA_MASK, 125000},
 293 };
 294
 295 static const struct tsadc_table v4_code_table[] = {
 296         {TSADCV3_DATA_MASK, -40000},
 297         {431, -40000},
 298         {426, -35000},
 299         {421, -30000},
 300         {415, -25000},
 301         {410, -20000},
 302         {405, -15000},
 303         {399, -10000},
 304         {394, -5000},
 305         {389, 0},
 306         {383, 5000},
 307         {378, 10000},
 308         {373, 15000},
 309         {367, 20000},
 310         {362, 25000},
 311         {357, 30000},
 312         {351, 35000},
 313         {346, 40000},
 314         {340, 45000},
 315         {335, 50000},
 316         {330, 55000},
 317         {324, 60000},
 318         {319, 65000},
 319         {313, 70000},
 320         {308, 75000},
 321         {302, 80000},
 322         {297, 85000},
 323         {291, 90000},
 324         {286, 95000},
 325         {281, 100000},
 326         {275, 105000},
 327         {270, 110000},
 328         {264, 115000},
 329         {259, 120000},
 330         {253, 125000},
 331 };
 332
 333 static u32 rk_tsadcv2_temp_to_code(struct chip_tsadc_table table,
 334                                    int temp)
 335 {
 336         int high, low, mid;
 337
 338         low = 0;
 339         high = table.length - 1;
 340         mid = (high + low) / 2;
 341
 342         if (temp < table.id[low].temp || temp > table.id[high].temp)
 343                 return 0;
 344
 345         while (low <= high) {
 346                 if (temp == table.id[mid].temp)
 347                         return table.id[mid].code;
 348                 else if (temp < table.id[mid].temp)
 349                         high = mid - 1;
 350                 else
 351                         low = mid + 1;
 352                 mid = (low + high) / 2;
 353         }
 354
 355         return 0;
 356 }
 357
 358 static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
 359                                    int *temp)
 360 {
 361         unsigned int low = 1;
 362         unsigned int high = table.length - 1;
 363         unsigned int mid = (low + high) / 2;
 364         unsigned int num;
 365         unsigned long denom;
 366
 367         WARN_ON(table.length < 2);
 368
 369         switch (table.mode) {
 370         case ADC_DECREMENT:
 371                 code &= table.data_mask;
 372                 if (code < table.id[high].code)
 373                         return -EAGAIN;         /* Incorrect reading */
 374
 375                 while (low <= high) {
 376                         if (code >= table.id[mid].code &&
 377                             code < table.id[mid - 1].code)
 378                                 break;
 379                         else if (code < table.id[mid].code)
 380                                 low = mid + 1;
 381                         else
 382                                 high = mid - 1;
 383
 384                         mid = (low + high) / 2;
 385                 }
 386                 break;
 387         case ADC_INCREMENT:
 388                 code &= table.data_mask;
 389                 if (code < table.id[low].code)
 390                         return -EAGAIN;         /* Incorrect reading */
 391
 392                 while (low <= high) {
 393                         if (code >= table.id[mid - 1].code &&
 394                             code < table.id[mid].code)
 395                                 break;
 396                         else if (code > table.id[mid].code)
 397                                 low = mid + 1;
 398                         else
 399                                 high = mid - 1;
 400
 401                         mid = (low + high) / 2;
 402                 }
 403                 break;
 404         default:
 405                 pr_err("Invalid the conversion table\n");
 406         }
 407
 408         /*
 409          * The 5C granularity provided by the table is too much. Let's
 410          * assume that the relationship between sensor readings and
 411          * temperature between 2 table entries is linear and interpolate
 412          * to produce less granular result.
 413          */
 414         num = table.id[mid].temp - table.id[mid - 1].temp;
 415         num *= abs(table.id[mid - 1].code - code);
 416         denom = abs(table.id[mid - 1].code - table.id[mid].code);
 417         *temp = table.id[mid - 1].temp + (num / denom);
 418
 419         return 0;
 420 }
 421
 422 /**
 423  * rk_tsadcv2_initialize - initialize TASDC Controller.
 424  *
 425  * (1) Set TSADC_V2_AUTO_PERIOD:
 426  *     Configure the interleave between every two accessing of
 427  *     TSADC in normal operation.
 428  *
 429  * (2) Set TSADCV2_AUTO_PERIOD_HT:
 430  *     Configure the interleave between every two accessing of
 431  *     TSADC after the temperature is higher than COM_SHUT or COM_INT.
 432  *
 433  * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE:
 434  *     If the temperature is higher than COMP_INT or COMP_SHUT for
 435  *     "debounce" times, TSADC controller will generate interrupt or TSHUT.
 436  */
 437 static void rk_tsadcv2_initialize(void __iomem *regs,
 438                                   enum tshut_polarity tshut_polarity)
 439 {
 440         if (tshut_polarity == TSHUT_HIGH_ACTIVE)
 441                 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 442                                regs + TSADCV2_AUTO_CON);
 443         else
 444                 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
 445                                regs + TSADCV2_AUTO_CON);
 446
 447         writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
 448         writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
 449                        regs + TSADCV2_HIGHT_INT_DEBOUNCE);
 450         writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
 451                        regs + TSADCV2_AUTO_PERIOD_HT);
 452         writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
 453                        regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
 454 }
 455
 456 static void rk_tsadcv1_irq_ack(void __iomem *regs)
 457 {
 458         u32 val;
 459
 460         val = readl_relaxed(regs + TSADCV2_INT_PD);
 461         writel_relaxed(val & TSADCV1_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
 462 }
 463
 464 static void rk_tsadcv2_irq_ack(void __iomem *regs)
 465 {
 466         u32 val;
 467
 468         val = readl_relaxed(regs + TSADCV2_INT_PD);
 469         writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
 470 }
 471
 472 static void rk_tsadcv2_control(void __iomem *regs, bool enable)
 473 {
 474         u32 val;
 475
 476         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 477         if (enable)
 478                 val |= TSADCV2_AUTO_EN;
 479         else
 480                 val &= ~TSADCV2_AUTO_EN;
 481
 482         writel_relaxed(val, regs + TSADCV2_AUTO_CON);
 483 }
 484
 485 static int rk_tsadcv2_get_temp(struct chip_tsadc_table table,
 486                                int chn, void __iomem *regs, int *temp)
 487 {
 488         u32 val;
 489
 490         val = readl_relaxed(regs + TSADCV2_DATA(chn));
 491
 492         return rk_tsadcv2_code_to_temp(table, val, temp);
 493 }
 494
 495 static void rk_tsadcv2_tshut_temp(struct chip_tsadc_table table,
 496                                   int chn, void __iomem *regs, int temp)
 497 {
 498         u32 tshut_value, val;
 499
 500         tshut_value = rk_tsadcv2_temp_to_code(table, temp);
 501         writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
 502
 503         /* TSHUT will be valid */
 504         val = readl_relaxed(regs + TSADCV2_AUTO_CON);
 505         writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
 506 }
 507
 508 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
 509                                   enum tshut_mode mode)
 510 {
 511         u32 val;
 512
 513         val = readl_relaxed(regs + TSADCV2_INT_EN);
 514         if (mode == TSHUT_MODE_GPIO) {
 515                 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
 516                 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 517         } else {
 518                 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
 519                 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
 520         }
 521
 522         writel_relaxed(val, regs + TSADCV2_INT_EN);
 523 }
 524
 525 static const struct rockchip_tsadc_chip rk3228_tsadc_data = {
 526         .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
 527         .chn_num = 1, /* one channel for tsadc */
 528
 529         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 530         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 531         .tshut_temp = 95000,
 532
 533         .initialize = rk_tsadcv2_initialize,
 534         .irq_ack = rk_tsadcv1_irq_ack,
 535         .control = rk_tsadcv2_control,
 536         .get_temp = rk_tsadcv2_get_temp,
 537         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 538         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 539
 540         .table = {
 541                 .id = v1_code_table,
 542                 .length = ARRAY_SIZE(v1_code_table),
 543                 .data_mask = TSADCV3_DATA_MASK,
 544                 .mode = ADC_DECREMENT,
 545         },
 546 };
 547
 548 static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
 549         .chn_id[SENSOR_CPU] = 1, /* cpu sensor is channel 1 */
 550         .chn_id[SENSOR_GPU] = 2, /* gpu sensor is channel 2 */
 551         .chn_num = 2, /* two channels for tsadc */
 552
 553         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 554         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 555         .tshut_temp = 95000,
 556
 557         .initialize = rk_tsadcv2_initialize,
 558         .irq_ack = rk_tsadcv2_irq_ack,
 559         .control = rk_tsadcv2_control,
 560         .get_temp = rk_tsadcv2_get_temp,
 561         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 562         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 563
 564         .table = {
 565                 .id = v2_code_table,
 566                 .length = ARRAY_SIZE(v2_code_table),
 567                 .data_mask = TSADCV2_DATA_MASK,
 568                 .mode = ADC_DECREMENT,
 569         },
 570 };
 571
 572 static const struct rockchip_tsadc_chip rk3368_tsadc_data = {
 573         .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
 574         .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
 575         .chn_num = 2, /* two channels for tsadc */
 576
 577         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 578         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 579         .tshut_temp = 95000,
 580
 581         .initialize = rk_tsadcv2_initialize,
 582         .irq_ack = rk_tsadcv2_irq_ack,
 583         .control = rk_tsadcv2_control,
 584         .get_temp = rk_tsadcv2_get_temp,
 585         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 586         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 587
 588         .table = {
 589                 .id = v3_code_table,
 590                 .length = ARRAY_SIZE(v3_code_table),
 591                 .data_mask = TSADCV3_DATA_MASK,
 592                 .mode = ADC_INCREMENT,
 593         },
 594 };
 595
 596 static const struct rockchip_tsadc_chip rk3399_tsadc_data = {
 597         .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
 598         .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
 599         .chn_num = 2, /* two channels for tsadc */
 600
 601         .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
 602         .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
 603         .tshut_temp = 95000,
 604
 605         .initialize = rk_tsadcv2_initialize,
 606         .irq_ack = rk_tsadcv1_irq_ack,
 607         .control = rk_tsadcv2_control,
 608         .get_temp = rk_tsadcv2_get_temp,
 609         .set_tshut_temp = rk_tsadcv2_tshut_temp,
 610         .set_tshut_mode = rk_tsadcv2_tshut_mode,
 611
 612         .table = {
 613                 .id = v4_code_table,
 614                 .length = ARRAY_SIZE(v4_code_table),
 615                 .data_mask = TSADCV3_DATA_MASK,
 616                 .mode = ADC_DECREMENT,
 617         },
 618 };
 619
 620 static const struct of_device_id of_rockchip_thermal_match[] = {
 621         {
 622                 .compatible = "rockchip,rk3228-tsadc",
 623                 .data = (void *)&rk3228_tsadc_data,
 624         },
 625         {
 626                 .compatible = "rockchip,rk3288-tsadc",
 627                 .data = (void *)&rk3288_tsadc_data,
 628         },
 629         {
 630                 .compatible = "rockchip,rk3368-tsadc",
 631                 .data = (void *)&rk3368_tsadc_data,
 632         },
 633         {
 634                 .compatible = "rockchip,rk3399-tsadc",
 635                 .data = (void *)&rk3399_tsadc_data,
 636         },
 637         { /* end */ },
 638 };
 639 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
 640
 641 static void
 642 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
 643 {
 644         struct thermal_zone_device *tzd = sensor->tzd;
 645
 646         tzd->ops->set_mode(tzd,
 647                 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED);
 648 }
 649
 650 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
 651 {
 652         struct rockchip_thermal_data *thermal = dev;
 653         int i;
 654
 655         dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
 656
 657         thermal->chip->irq_ack(thermal->regs);
 658
 659         for (i = 0; i < thermal->chip->chn_num; i++)
 660                 thermal_zone_device_update(thermal->sensors[i].tzd);
 661
 662         return IRQ_HANDLED;
 663 }
 664
 665 static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
 666 {
 667         struct rockchip_thermal_sensor *sensor = _sensor;
 668         struct rockchip_thermal_data *thermal = sensor->thermal;
 669         const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
 670         int retval;
 671
 672         retval = tsadc->get_temp(tsadc->table,
 673                                  sensor->id, thermal->regs, out_temp);
 674         dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
 675                 sensor->id, *out_temp, retval);
 676
 677         return retval;
 678 }
 679
 680 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
 681         .get_temp = rockchip_thermal_get_temp,
 682 };
 683
 684 static int rockchip_configure_from_dt(struct device *dev,
 685                                       struct device_node *np,
 686                                       struct rockchip_thermal_data *thermal)
 687 {
 688         u32 shut_temp, tshut_mode, tshut_polarity;
 689
 690         if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
 691                 dev_warn(dev,
 692                          "Missing tshut temp property, using default %d\n",
 693                          thermal->chip->tshut_temp);
 694                 thermal->tshut_temp = thermal->chip->tshut_temp;
 695         } else {
 696                 thermal->tshut_temp = shut_temp;
 697         }
 698
 699         if (thermal->tshut_temp > INT_MAX) {
 700                 dev_err(dev, "Invalid tshut temperature specified: %d\n",
 701                         thermal->tshut_temp);
 702                 return -ERANGE;
 703         }
 704
 705         if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
 706                 dev_warn(dev,
 707                          "Missing tshut mode property, using default (%s)\n",
 708                          thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
 709                                 "gpio" : "cru");
 710                 thermal->tshut_mode = thermal->chip->tshut_mode;
 711         } else {
 712                 thermal->tshut_mode = tshut_mode;
 713         }
 714
 715         if (thermal->tshut_mode > 1) {
 716                 dev_err(dev, "Invalid tshut mode specified: %d\n",
 717                         thermal->tshut_mode);
 718                 return -EINVAL;
 719         }
 720
 721         if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
 722                                  &tshut_polarity)) {
 723                 dev_warn(dev,
 724                          "Missing tshut-polarity property, using default (%s)\n",
 725                          thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
 726                                 "low" : "high");
 727                 thermal->tshut_polarity = thermal->chip->tshut_polarity;
 728         } else {
 729                 thermal->tshut_polarity = tshut_polarity;
 730         }
 731
 732         if (thermal->tshut_polarity > 1) {
 733                 dev_err(dev, "Invalid tshut-polarity specified: %d\n",
 734                         thermal->tshut_polarity);
 735                 return -EINVAL;
 736         }
 737
 738         return 0;
 739 }
 740
 741 static int
 742 rockchip_thermal_register_sensor(struct platform_device *pdev,
 743                                  struct rockchip_thermal_data *thermal,
 744                                  struct rockchip_thermal_sensor *sensor,
 745                                  int id)
 746 {
 747         const struct rockchip_tsadc_chip *tsadc = thermal->chip;
 748         int error;
 749
 750         tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
 751         tsadc->set_tshut_temp(tsadc->table, id, thermal->regs,
 752                               thermal->tshut_temp);
 753
 754         sensor->thermal = thermal;
 755         sensor->id = id;
 756         sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor,
 757                                                       &rockchip_of_thermal_ops);
 758         if (IS_ERR(sensor->tzd)) {
 759                 error = PTR_ERR(sensor->tzd);
 760                 dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
 761                         id, error);
 762                 return error;
 763         }
 764
 765         return 0;
 766 }
 767
 768 /**
 769  * Reset TSADC Controller, reset all tsadc registers.
 770  */
 771 static void rockchip_thermal_reset_controller(struct reset_control *reset)
 772 {
 773         reset_control_assert(reset);
 774         usleep_range(10, 20);
 775         reset_control_deassert(reset);
 776 }
 777
 778 static int rockchip_thermal_probe(struct platform_device *pdev)
 779 {
 780         struct device_node *np = pdev->dev.of_node;
 781         struct rockchip_thermal_data *thermal;
 782         const struct of_device_id *match;
 783         struct resource *res;
 784         int irq;
 785         int i, j;
 786         int error;
 787
 788         match = of_match_node(of_rockchip_thermal_match, np);
 789         if (!match)
 790                 return -ENXIO;
 791
 792         irq = platform_get_irq(pdev, 0);
 793         if (irq < 0) {
 794                 dev_err(&pdev->dev, "no irq resource?\n");
 795                 return -EINVAL;
 796         }
 797
 798         thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
 799                                GFP_KERNEL);
 800         if (!thermal)
 801                 return -ENOMEM;
 802
 803         thermal->pdev = pdev;
 804
 805         thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
 806         if (!thermal->chip)
 807                 return -EINVAL;
 808
 809         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 810         thermal->regs = devm_ioremap_resource(&pdev->dev, res);
 811         if (IS_ERR(thermal->regs))
 812                 return PTR_ERR(thermal->regs);
 813
 814         thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
 815         if (IS_ERR(thermal->reset)) {
 816                 error = PTR_ERR(thermal->reset);
 817                 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
 818                 return error;
 819         }
 820
 821         thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
 822         if (IS_ERR(thermal->clk)) {
 823                 error = PTR_ERR(thermal->clk);
 824                 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
 825                 return error;
 826         }
 827
 828         thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
 829         if (IS_ERR(thermal->pclk)) {
 830                 error = PTR_ERR(thermal->pclk);
 831                 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
 832                         error);
 833                 return error;
 834         }
 835
 836         error = clk_prepare_enable(thermal->clk);
 837         if (error) {
 838                 dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
 839                         error);
 840                 return error;
 841         }
 842
 843         error = clk_prepare_enable(thermal->pclk);
 844         if (error) {
 845                 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
 846                 goto err_disable_clk;
 847         }
 848
 849         rockchip_thermal_reset_controller(thermal->reset);
 850
 851         error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
 852         if (error) {
 853                 dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
 854                         error);
 855                 goto err_disable_pclk;
 856         }
 857
 858         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 859
 860         for (i = 0; i < thermal->chip->chn_num; i++) {
 861                 error = rockchip_thermal_register_sensor(pdev, thermal,
 862                                                 &thermal->sensors[i],
 863                                                 thermal->chip->chn_id[i]);
 864                 if (error) {
 865                         dev_err(&pdev->dev,
 866                                 "failed to register sensor[%d] : error = %d\n",
 867                                 i, error);
 868                         for (j = 0; j < i; j++)
 869                                 thermal_zone_of_sensor_unregister(&pdev->dev,
 870                                                 thermal->sensors[j].tzd);
 871                         goto err_disable_pclk;
 872                 }
 873         }
 874
 875         error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 876                                           &rockchip_thermal_alarm_irq_thread,
 877                                           IRQF_ONESHOT,
 878                                           "rockchip_thermal", thermal);
 879         if (error) {
 880                 dev_err(&pdev->dev,
 881                         "failed to request tsadc irq: %d\n", error);
 882                 goto err_unregister_sensor;
 883         }
 884
 885         thermal->chip->control(thermal->regs, true);
 886
 887         for (i = 0; i < thermal->chip->chn_num; i++)
 888                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 889
 890         platform_set_drvdata(pdev, thermal);
 891
 892         return 0;
 893
 894 err_unregister_sensor:
 895         while (i--)
 896                 thermal_zone_of_sensor_unregister(&pdev->dev,
 897                                                   thermal->sensors[i].tzd);
 898
 899 err_disable_pclk:
 900         clk_disable_unprepare(thermal->pclk);
 901 err_disable_clk:
 902         clk_disable_unprepare(thermal->clk);
 903
 904         return error;
 905 }
 906
 907 static int rockchip_thermal_remove(struct platform_device *pdev)
 908 {
 909         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 910         int i;
 911
 912         for (i = 0; i < thermal->chip->chn_num; i++) {
 913                 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
 914
 915                 rockchip_thermal_toggle_sensor(sensor, false);
 916                 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd);
 917         }
 918
 919         thermal->chip->control(thermal->regs, false);
 920
 921         clk_disable_unprepare(thermal->pclk);
 922         clk_disable_unprepare(thermal->clk);
 923
 924         return 0;
 925 }
 926
 927 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
 928 {
 929         struct platform_device *pdev = to_platform_device(dev);
 930         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 931         int i;
 932
 933         for (i = 0; i < thermal->chip->chn_num; i++)
 934                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
 935
 936         thermal->chip->control(thermal->regs, false);
 937
 938         clk_disable(thermal->pclk);
 939         clk_disable(thermal->clk);
 940
 941         pinctrl_pm_select_sleep_state(dev);
 942
 943         return 0;
 944 }
 945
 946 static int __maybe_unused rockchip_thermal_resume(struct device *dev)
 947 {
 948         struct platform_device *pdev = to_platform_device(dev);
 949         struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 950         int i;
 951         int error;
 952
 953         error = clk_enable(thermal->clk);
 954         if (error)
 955                 return error;
 956
 957         error = clk_enable(thermal->pclk);
 958         if (error)
 959                 return error;
 960
 961         rockchip_thermal_reset_controller(thermal->reset);
 962
 963         thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
 964
 965         for (i = 0; i < thermal->chip->chn_num; i++) {
 966                 int id = thermal->sensors[i].id;
 967
 968                 thermal->chip->set_tshut_mode(id, thermal->regs,
 969                                               thermal->tshut_mode);
 970                 thermal->chip->set_tshut_temp(thermal->chip->table,
 971                                               id, thermal->regs,
 972                                               thermal->tshut_temp);
 973         }
 974
 975         thermal->chip->control(thermal->regs, true);
 976
 977         for (i = 0; i < thermal->chip->chn_num; i++)
 978                 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
 979
 980         pinctrl_pm_select_default_state(dev);
 981
 982         return 0;
 983 }
 984
 985 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
 986                          rockchip_thermal_suspend, rockchip_thermal_resume);
 987
 988 static struct platform_driver rockchip_thermal_driver = {
 989         .driver = {
 990                 .name = "rockchip-thermal",
 991                 .pm = &rockchip_thermal_pm_ops,
 992                 .of_match_table = of_rockchip_thermal_match,
 993         },
 994         .probe = rockchip_thermal_probe,
 995         .remove = rockchip_thermal_remove,
 996 };
 997
 998 module_platform_driver(rockchip_thermal_driver);
 999
1000 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
1001 MODULE_AUTHOR("Rockchip, Inc.");
1002 MODULE_LICENSE("GPL v2");
1003 MODULE_ALIAS("platform:rockchip-thermal");