drivers/thermal/mtk_thermal.c

   1 /*
   2  * Copyright (c) 2015 MediaTek Inc.
   3  * Author: Hanyi Wu <hanyi.wu@mediatek.com>
   4  *         Sascha Hauer <s.hauer@pengutronix.de>
   5  *         Dawei Chien <dawei.chien@mediatek.com>
   6  *         Louis Yu <louis.yu@mediatek.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/clk.h>
  19 #include <linux/delay.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/nvmem-consumer.h>
  24 #include <linux/of.h>
  25 #include <linux/of_address.h>
  26 #include <linux/of_device.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/slab.h>
  29 #include <linux/io.h>
  30 #include <linux/thermal.h>
  31 #include <linux/reset.h>
  32 #include <linux/types.h>
  33
  34 /* AUXADC Registers */
  35 #define AUXADC_CON1_SET_V       0x008
  36 #define AUXADC_CON1_CLR_V       0x00c
  37 #define AUXADC_CON2_V           0x010
  38 #define AUXADC_DATA(channel)    (0x14 + (channel) * 4)
  39
  40 #define APMIXED_SYS_TS_CON1     0x604
  41
  42 /* Thermal Controller Registers */
  43 #define TEMP_MONCTL0            0x000
  44 #define TEMP_MONCTL1            0x004
  45 #define TEMP_MONCTL2            0x008
  46 #define TEMP_MONIDET0           0x014
  47 #define TEMP_MONIDET1           0x018
  48 #define TEMP_MSRCTL0            0x038
  49 #define TEMP_AHBPOLL            0x040
  50 #define TEMP_AHBTO              0x044
  51 #define TEMP_ADCPNP0            0x048
  52 #define TEMP_ADCPNP1            0x04c
  53 #define TEMP_ADCPNP2            0x050
  54 #define TEMP_ADCPNP3            0x0b4
  55
  56 #define TEMP_ADCMUX             0x054
  57 #define TEMP_ADCEN              0x060
  58 #define TEMP_PNPMUXADDR         0x064
  59 #define TEMP_ADCMUXADDR         0x068
  60 #define TEMP_ADCENADDR          0x074
  61 #define TEMP_ADCVALIDADDR       0x078
  62 #define TEMP_ADCVOLTADDR        0x07c
  63 #define TEMP_RDCTRL             0x080
  64 #define TEMP_ADCVALIDMASK       0x084
  65 #define TEMP_ADCVOLTAGESHIFT    0x088
  66 #define TEMP_ADCWRITECTRL       0x08c
  67 #define TEMP_MSR0               0x090
  68 #define TEMP_MSR1               0x094
  69 #define TEMP_MSR2               0x098
  70 #define TEMP_MSR3               0x0B8
  71
  72 #define TEMP_SPARE0             0x0f0
  73
  74 #define PTPCORESEL              0x400
  75
  76 #define TEMP_MONCTL1_PERIOD_UNIT(x)     ((x) & 0x3ff)
  77
  78 #define TEMP_MONCTL2_FILTER_INTERVAL(x) (((x) & 0x3ff) << 16)
  79 #define TEMP_MONCTL2_SENSOR_INTERVAL(x) ((x) & 0x3ff)
  80
  81 #define TEMP_AHBPOLL_ADC_POLL_INTERVAL(x)       (x)
  82
  83 #define TEMP_ADCWRITECTRL_ADC_PNP_WRITE         BIT(0)
  84 #define TEMP_ADCWRITECTRL_ADC_MUX_WRITE         BIT(1)
  85
  86 #define TEMP_ADCVALIDMASK_VALID_HIGH            BIT(5)
  87 #define TEMP_ADCVALIDMASK_VALID_POS(bit)        (bit)
  88
  89 /* MT8173 thermal sensors */
  90 #define MT8173_TS1      0
  91 #define MT8173_TS2      1
  92 #define MT8173_TS3      2
  93 #define MT8173_TS4      3
  94 #define MT8173_TSABB    4
  95
  96 /* AUXADC channel 11 is used for the temperature sensors */
  97 #define MT8173_TEMP_AUXADC_CHANNEL      11
  98
  99 /* The total number of temperature sensors in the MT8173 */
 100 #define MT8173_NUM_SENSORS              5
 101
 102 /* The number of banks in the MT8173 */
 103 #define MT8173_NUM_ZONES                4
 104
 105 /* The number of sensing points per bank */
 106 #define MT8173_NUM_SENSORS_PER_ZONE     4
 107
 108 /*
 109  * Layout of the fuses providing the calibration data
 110  * These macros could be used for MT8173, MT2701, and MT2712.
 111  * MT8173 has 5 sensors and needs 5 VTS calibration data.
 112  * MT2701 has 3 sensors and needs 3 VTS calibration data.
 113  * MT2712 has 4 sensors and needs 4 VTS calibration data.
 114  */
 115 #define MT8173_CALIB_BUF0_VALID         BIT(0)
 116 #define MT8173_CALIB_BUF1_ADC_GE(x)     (((x) >> 22) & 0x3ff)
 117 #define MT8173_CALIB_BUF0_VTS_TS1(x)    (((x) >> 17) & 0x1ff)
 118 #define MT8173_CALIB_BUF0_VTS_TS2(x)    (((x) >> 8) & 0x1ff)
 119 #define MT8173_CALIB_BUF1_VTS_TS3(x)    (((x) >> 0) & 0x1ff)
 120 #define MT8173_CALIB_BUF2_VTS_TS4(x)    (((x) >> 23) & 0x1ff)
 121 #define MT8173_CALIB_BUF2_VTS_TSABB(x)  (((x) >> 14) & 0x1ff)
 122 #define MT8173_CALIB_BUF0_DEGC_CALI(x)  (((x) >> 1) & 0x3f)
 123 #define MT8173_CALIB_BUF0_O_SLOPE(x)    (((x) >> 26) & 0x3f)
 124 #define MT8173_CALIB_BUF0_O_SLOPE_SIGN(x)       (((x) >> 7) & 0x1)
 125 #define MT8173_CALIB_BUF1_ID(x) (((x) >> 9) & 0x1)
 126
 127 /* MT2701 thermal sensors */
 128 #define MT2701_TS1      0
 129 #define MT2701_TS2      1
 130 #define MT2701_TSABB    2
 131
 132 /* AUXADC channel 11 is used for the temperature sensors */
 133 #define MT2701_TEMP_AUXADC_CHANNEL      11
 134
 135 /* The total number of temperature sensors in the MT2701 */
 136 #define MT2701_NUM_SENSORS      3
 137
 138 /* The number of sensing points per bank */
 139 #define MT2701_NUM_SENSORS_PER_ZONE     3
 140
 141 /* MT2712 thermal sensors */
 142 #define MT2712_TS1      0
 143 #define MT2712_TS2      1
 144 #define MT2712_TS3      2
 145 #define MT2712_TS4      3
 146
 147 /* AUXADC channel 11 is used for the temperature sensors */
 148 #define MT2712_TEMP_AUXADC_CHANNEL      11
 149
 150 /* The total number of temperature sensors in the MT2712 */
 151 #define MT2712_NUM_SENSORS      4
 152
 153 /* The number of sensing points per bank */
 154 #define MT2712_NUM_SENSORS_PER_ZONE     4
 155
 156 #define MT7622_TEMP_AUXADC_CHANNEL      11
 157 #define MT7622_NUM_SENSORS              1
 158 #define MT7622_NUM_ZONES                1
 159 #define MT7622_NUM_SENSORS_PER_ZONE     1
 160 #define MT7622_TS1      0
 161
 162 struct mtk_thermal;
 163
 164 struct thermal_bank_cfg {
 165         unsigned int num_sensors;
 166         const int *sensors;
 167 };
 168
 169 struct mtk_thermal_bank {
 170         struct mtk_thermal *mt;
 171         int id;
 172 };
 173
 174 struct mtk_thermal_data {
 175         s32 num_banks;
 176         s32 num_sensors;
 177         s32 auxadc_channel;
 178         const int *sensor_mux_values;
 179         const int *msr;
 180         const int *adcpnp;
 181         struct thermal_bank_cfg bank_data[];
 182 };
 183
 184 struct mtk_thermal {
 185         struct device *dev;
 186         void __iomem *thermal_base;
 187
 188         struct clk *clk_peri_therm;
 189         struct clk *clk_auxadc;
 190         /* lock: for getting and putting banks */
 191         struct mutex lock;
 192
 193         /* Calibration values */
 194         s32 adc_ge;
 195         s32 degc_cali;
 196         s32 o_slope;
 197         s32 vts[MT8173_NUM_SENSORS];
 198
 199         const struct mtk_thermal_data *conf;
 200         struct mtk_thermal_bank banks[];
 201 };
 202
 203 /* MT8173 thermal sensor data */
 204 static const int mt8173_bank_data[MT8173_NUM_ZONES][3] = {
 205         { MT8173_TS2, MT8173_TS3 },
 206         { MT8173_TS2, MT8173_TS4 },
 207         { MT8173_TS1, MT8173_TS2, MT8173_TSABB },
 208         { MT8173_TS2 },
 209 };
 210
 211 static const int mt8173_msr[MT8173_NUM_SENSORS_PER_ZONE] = {
 212         TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR3
 213 };
 214
 215 static const int mt8173_adcpnp[MT8173_NUM_SENSORS_PER_ZONE] = {
 216         TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2, TEMP_ADCPNP3
 217 };
 218
 219 static const int mt8173_mux_values[MT8173_NUM_SENSORS] = { 0, 1, 2, 3, 16 };
 220
 221 /* MT2701 thermal sensor data */
 222 static const int mt2701_bank_data[MT2701_NUM_SENSORS] = {
 223         MT2701_TS1, MT2701_TS2, MT2701_TSABB
 224 };
 225
 226 static const int mt2701_msr[MT2701_NUM_SENSORS_PER_ZONE] = {
 227         TEMP_MSR0, TEMP_MSR1, TEMP_MSR2
 228 };
 229
 230 static const int mt2701_adcpnp[MT2701_NUM_SENSORS_PER_ZONE] = {
 231         TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2
 232 };
 233
 234 static const int mt2701_mux_values[MT2701_NUM_SENSORS] = { 0, 1, 16 };
 235
 236 /* MT2712 thermal sensor data */
 237 static const int mt2712_bank_data[MT2712_NUM_SENSORS] = {
 238         MT2712_TS1, MT2712_TS2, MT2712_TS3, MT2712_TS4
 239 };
 240
 241 static const int mt2712_msr[MT2712_NUM_SENSORS_PER_ZONE] = {
 242         TEMP_MSR0, TEMP_MSR1, TEMP_MSR2, TEMP_MSR3
 243 };
 244
 245 static const int mt2712_adcpnp[MT2712_NUM_SENSORS_PER_ZONE] = {
 246         TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2, TEMP_ADCPNP3
 247 };
 248
 249 static const int mt2712_mux_values[MT2712_NUM_SENSORS] = { 0, 1, 2, 3 };
 250
 251 /* MT7622 thermal sensor data */
 252 static const int mt7622_bank_data[MT7622_NUM_SENSORS] = { MT7622_TS1, };
 253 static const int mt7622_msr[MT7622_NUM_SENSORS_PER_ZONE] = { TEMP_MSR0, };
 254 static const int mt7622_adcpnp[MT7622_NUM_SENSORS_PER_ZONE] = { TEMP_ADCPNP0, };
 255 static const int mt7622_mux_values[MT7622_NUM_SENSORS] = { 0, };
 256
 257 /**
 258  * The MT8173 thermal controller has four banks. Each bank can read up to
 259  * four temperature sensors simultaneously. The MT8173 has a total of 5
 260  * temperature sensors. We use each bank to measure a certain area of the
 261  * SoC. Since TS2 is located centrally in the SoC it is influenced by multiple
 262  * areas, hence is used in different banks.
 263  *
 264  * The thermal core only gets the maximum temperature of all banks, so
 265  * the bank concept wouldn't be necessary here. However, the SVS (Smart
 266  * Voltage Scaling) unit makes its decisions based on the same bank
 267  * data, and this indeed needs the temperatures of the individual banks
 268  * for making better decisions.
 269  */
 270 static const struct mtk_thermal_data mt8173_thermal_data = {
 271         .auxadc_channel = MT8173_TEMP_AUXADC_CHANNEL,
 272         .num_banks = MT8173_NUM_ZONES,
 273         .num_sensors = MT8173_NUM_SENSORS,
 274         .bank_data = {
 275                 {
 276                         .num_sensors = 2,
 277                         .sensors = mt8173_bank_data[0],
 278                 }, {
 279                         .num_sensors = 2,
 280                         .sensors = mt8173_bank_data[1],
 281                 }, {
 282                         .num_sensors = 3,
 283                         .sensors = mt8173_bank_data[2],
 284                 }, {
 285                         .num_sensors = 1,
 286                         .sensors = mt8173_bank_data[3],
 287                 },
 288         },
 289         .msr = mt8173_msr,
 290         .adcpnp = mt8173_adcpnp,
 291         .sensor_mux_values = mt8173_mux_values,
 292 };
 293
 294 /**
 295  * The MT2701 thermal controller has one bank, which can read up to
 296  * three temperature sensors simultaneously. The MT2701 has a total of 3
 297  * temperature sensors.
 298  *
 299  * The thermal core only gets the maximum temperature of this one bank,
 300  * so the bank concept wouldn't be necessary here. However, the SVS (Smart
 301  * Voltage Scaling) unit makes its decisions based on the same bank
 302  * data.
 303  */
 304 static const struct mtk_thermal_data mt2701_thermal_data = {
 305         .auxadc_channel = MT2701_TEMP_AUXADC_CHANNEL,
 306         .num_banks = 1,
 307         .num_sensors = MT2701_NUM_SENSORS,
 308         .bank_data = {
 309                 {
 310                         .num_sensors = 3,
 311                         .sensors = mt2701_bank_data,
 312                 },
 313         },
 314         .msr = mt2701_msr,
 315         .adcpnp = mt2701_adcpnp,
 316         .sensor_mux_values = mt2701_mux_values,
 317 };
 318
 319 /**
 320  * The MT2712 thermal controller has one bank, which can read up to
 321  * four temperature sensors simultaneously. The MT2712 has a total of 4
 322  * temperature sensors.
 323  *
 324  * The thermal core only gets the maximum temperature of this one bank,
 325  * so the bank concept wouldn't be necessary here. However, the SVS (Smart
 326  * Voltage Scaling) unit makes its decisions based on the same bank
 327  * data.
 328  */
 329 static const struct mtk_thermal_data mt2712_thermal_data = {
 330         .auxadc_channel = MT2712_TEMP_AUXADC_CHANNEL,
 331         .num_banks = 1,
 332         .num_sensors = MT2712_NUM_SENSORS,
 333         .bank_data = {
 334                 {
 335                         .num_sensors = 4,
 336                         .sensors = mt2712_bank_data,
 337                 },
 338         },
 339         .msr = mt2712_msr,
 340         .adcpnp = mt2712_adcpnp,
 341         .sensor_mux_values = mt2712_mux_values,
 342 };
 343
 344 /*
 345  * MT7622 have only one sensing point which uses AUXADC Channel 11 for raw data
 346  * access.
 347  */
 348 static const struct mtk_thermal_data mt7622_thermal_data = {
 349         .auxadc_channel = MT7622_TEMP_AUXADC_CHANNEL,
 350         .num_banks = MT7622_NUM_ZONES,
 351         .num_sensors = MT7622_NUM_SENSORS,
 352         .bank_data = {
 353                 {
 354                         .num_sensors = 1,
 355                         .sensors = mt7622_bank_data,
 356                 },
 357         },
 358         .msr = mt7622_msr,
 359         .adcpnp = mt7622_adcpnp,
 360         .sensor_mux_values = mt7622_mux_values,
 361 };
 362
 363 /**
 364  * raw_to_mcelsius - convert a raw ADC value to mcelsius
 365  * @mt:         The thermal controller
 366  * @raw:        raw ADC value
 367  *
 368  * This converts the raw ADC value to mcelsius using the SoC specific
 369  * calibration constants
 370  */
 371 static int raw_to_mcelsius(struct mtk_thermal *mt, int sensno, s32 raw)
 372 {
 373         s32 tmp;
 374
 375         raw &= 0xfff;
 376
 377         tmp = 203450520 << 3;
 378         tmp /= 165 + mt->o_slope;
 379         tmp /= 10000 + mt->adc_ge;
 380         tmp *= raw - mt->vts[sensno] - 3350;
 381         tmp >>= 3;
 382
 383         return mt->degc_cali * 500 - tmp;
 384 }
 385
 386 /**
 387  * mtk_thermal_get_bank - get bank
 388  * @bank:       The bank
 389  *
 390  * The bank registers are banked, we have to select a bank in the
 391  * PTPCORESEL register to access it.
 392  */
 393 static void mtk_thermal_get_bank(struct mtk_thermal_bank *bank)
 394 {
 395         struct mtk_thermal *mt = bank->mt;
 396         u32 val;
 397
 398         mutex_lock(&mt->lock);
 399
 400         val = readl(mt->thermal_base + PTPCORESEL);
 401         val &= ~0xf;
 402         val |= bank->id;
 403         writel(val, mt->thermal_base + PTPCORESEL);
 404 }
 405
 406 /**
 407  * mtk_thermal_put_bank - release bank
 408  * @bank:       The bank
 409  *
 410  * release a bank previously taken with mtk_thermal_get_bank,
 411  */
 412 static void mtk_thermal_put_bank(struct mtk_thermal_bank *bank)
 413 {
 414         struct mtk_thermal *mt = bank->mt;
 415
 416         mutex_unlock(&mt->lock);
 417 }
 418
 419 /**
 420  * mtk_thermal_bank_temperature - get the temperature of a bank
 421  * @bank:       The bank
 422  *
 423  * The temperature of a bank is considered the maximum temperature of
 424  * the sensors associated to the bank.
 425  */
 426 static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
 427 {
 428         struct mtk_thermal *mt = bank->mt;
 429         const struct mtk_thermal_data *conf = mt->conf;
 430         int i, temp = INT_MIN, max = INT_MIN;
 431         u32 raw;
 432
 433         for (i = 0; i < conf->bank_data[bank->id].num_sensors; i++) {
 434                 raw = readl(mt->thermal_base +
 435                             conf->msr[conf->bank_data[bank->id].sensors[i]]);
 436
 437                 temp = raw_to_mcelsius(mt,
 438                                        conf->bank_data[bank->id].sensors[i],
 439                                        raw);
 440
 441                 /*
 442                  * The first read of a sensor often contains very high bogus
 443                  * temperature value. Filter these out so that the system does
 444                  * not immediately shut down.
 445                  */
 446                 if (temp > 200000)
 447                         temp = 0;
 448
 449                 if (temp > max)
 450                         max = temp;
 451         }
 452
 453         return max;
 454 }
 455
 456 static int mtk_read_temp(void *data, int *temperature)
 457 {
 458         struct mtk_thermal *mt = data;
 459         int i;
 460         int tempmax = INT_MIN;
 461
 462         for (i = 0; i < mt->conf->num_banks; i++) {
 463                 struct mtk_thermal_bank *bank = &mt->banks[i];
 464
 465                 mtk_thermal_get_bank(bank);
 466
 467                 tempmax = max(tempmax, mtk_thermal_bank_temperature(bank));
 468
 469                 mtk_thermal_put_bank(bank);
 470         }
 471
 472         *temperature = tempmax;
 473
 474         return 0;
 475 }
 476
 477 static const struct thermal_zone_of_device_ops mtk_thermal_ops = {
 478         .get_temp = mtk_read_temp,
 479 };
 480
 481 static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
 482                                   u32 apmixed_phys_base, u32 auxadc_phys_base)
 483 {
 484         struct mtk_thermal_bank *bank = &mt->banks[num];
 485         const struct mtk_thermal_data *conf = mt->conf;
 486         int i;
 487
 488         bank->id = num;
 489         bank->mt = mt;
 490
 491         mtk_thermal_get_bank(bank);
 492
 493         /* bus clock 66M counting unit is 12 * 15.15ns * 256 = 46.540us */
 494         writel(TEMP_MONCTL1_PERIOD_UNIT(12), mt->thermal_base + TEMP_MONCTL1);
 495
 496         /*
 497          * filt interval is 1 * 46.540us = 46.54us,
 498          * sen interval is 429 * 46.540us = 19.96ms
 499          */
 500         writel(TEMP_MONCTL2_FILTER_INTERVAL(1) |
 501                         TEMP_MONCTL2_SENSOR_INTERVAL(429),
 502                         mt->thermal_base + TEMP_MONCTL2);
 503
 504         /* poll is set to 10u */
 505         writel(TEMP_AHBPOLL_ADC_POLL_INTERVAL(768),
 506                mt->thermal_base + TEMP_AHBPOLL);
 507
 508         /* temperature sampling control, 1 sample */
 509         writel(0x0, mt->thermal_base + TEMP_MSRCTL0);
 510
 511         /* exceed this polling time, IRQ would be inserted */
 512         writel(0xffffffff, mt->thermal_base + TEMP_AHBTO);
 513
 514         /* number of interrupts per event, 1 is enough */
 515         writel(0x0, mt->thermal_base + TEMP_MONIDET0);
 516         writel(0x0, mt->thermal_base + TEMP_MONIDET1);
 517
 518         /*
 519          * The MT8173 thermal controller does not have its own ADC. Instead it
 520          * uses AHB bus accesses to control the AUXADC. To do this the thermal
 521          * controller has to be programmed with the physical addresses of the
 522          * AUXADC registers and with the various bit positions in the AUXADC.
 523          * Also the thermal controller controls a mux in the APMIXEDSYS register
 524          * space.
 525          */
 526
 527         /*
 528          * this value will be stored to TEMP_PNPMUXADDR (TEMP_SPARE0)
 529          * automatically by hw
 530          */
 531         writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCMUX);
 532
 533         /* AHB address for auxadc mux selection */
 534         writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
 535                mt->thermal_base + TEMP_ADCMUXADDR);
 536
 537         /* AHB address for pnp sensor mux selection */
 538         writel(apmixed_phys_base + APMIXED_SYS_TS_CON1,
 539                mt->thermal_base + TEMP_PNPMUXADDR);
 540
 541         /* AHB value for auxadc enable */
 542         writel(BIT(conf->auxadc_channel), mt->thermal_base + TEMP_ADCEN);
 543
 544         /* AHB address for auxadc enable (channel 0 immediate mode selected) */
 545         writel(auxadc_phys_base + AUXADC_CON1_SET_V,
 546                mt->thermal_base + TEMP_ADCENADDR);
 547
 548         /* AHB address for auxadc valid bit */
 549         writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
 550                mt->thermal_base + TEMP_ADCVALIDADDR);
 551
 552         /* AHB address for auxadc voltage output */
 553         writel(auxadc_phys_base + AUXADC_DATA(conf->auxadc_channel),
 554                mt->thermal_base + TEMP_ADCVOLTADDR);
 555
 556         /* read valid & voltage are at the same register */
 557         writel(0x0, mt->thermal_base + TEMP_RDCTRL);
 558
 559         /* indicate where the valid bit is */
 560         writel(TEMP_ADCVALIDMASK_VALID_HIGH | TEMP_ADCVALIDMASK_VALID_POS(12),
 561                mt->thermal_base + TEMP_ADCVALIDMASK);
 562
 563         /* no shift */
 564         writel(0x0, mt->thermal_base + TEMP_ADCVOLTAGESHIFT);
 565
 566         /* enable auxadc mux write transaction */
 567         writel(TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
 568                mt->thermal_base + TEMP_ADCWRITECTRL);
 569
 570         for (i = 0; i < conf->bank_data[num].num_sensors; i++)
 571                 writel(conf->sensor_mux_values[conf->bank_data[num].sensors[i]],
 572                        mt->thermal_base +
 573                        conf->adcpnp[conf->bank_data[num].sensors[i]]);
 574
 575         writel((1 << conf->bank_data[num].num_sensors) - 1,
 576                mt->thermal_base + TEMP_MONCTL0);
 577
 578         writel(TEMP_ADCWRITECTRL_ADC_PNP_WRITE |
 579                TEMP_ADCWRITECTRL_ADC_MUX_WRITE,
 580                mt->thermal_base + TEMP_ADCWRITECTRL);
 581
 582         mtk_thermal_put_bank(bank);
 583 }
 584
 585 static u64 of_get_phys_base(struct device_node *np)
 586 {
 587         u64 size64;
 588         const __be32 *regaddr_p;
 589
 590         regaddr_p = of_get_address(np, 0, &size64, NULL);
 591         if (!regaddr_p)
 592                 return OF_BAD_ADDR;
 593
 594         return of_translate_address(np, regaddr_p);
 595 }
 596
 597 static int mtk_thermal_get_calibration_data(struct device *dev,
 598                                             struct mtk_thermal *mt)
 599 {
 600         struct nvmem_cell *cell;
 601         u32 *buf;
 602         size_t len;
 603         int i, ret = 0;
 604
 605         /* Start with default values */
 606         mt->adc_ge = 512;
 607         for (i = 0; i < mt->conf->num_sensors; i++)
 608                 mt->vts[i] = 260;
 609         mt->degc_cali = 40;
 610         mt->o_slope = 0;
 611
 612         cell = nvmem_cell_get(dev, "calibration-data");
 613         if (IS_ERR(cell)) {
 614                 if (PTR_ERR(cell) == -EPROBE_DEFER)
 615                         return PTR_ERR(cell);
 616                 return 0;
 617         }
 618
 619         buf = (u32 *)nvmem_cell_read(cell, &len);
 620
 621         nvmem_cell_put(cell);
 622
 623         if (IS_ERR(buf))
 624                 return PTR_ERR(buf);
 625
 626         if (len < 3 * sizeof(u32)) {
 627                 dev_warn(dev, "invalid calibration data\n");
 628                 ret = -EINVAL;
 629                 goto out;
 630         }
 631
 632         if (buf[0] & MT8173_CALIB_BUF0_VALID) {
 633                 mt->adc_ge = MT8173_CALIB_BUF1_ADC_GE(buf[1]);
 634                 mt->vts[MT8173_TS1] = MT8173_CALIB_BUF0_VTS_TS1(buf[0]);
 635                 mt->vts[MT8173_TS2] = MT8173_CALIB_BUF0_VTS_TS2(buf[0]);
 636                 mt->vts[MT8173_TS3] = MT8173_CALIB_BUF1_VTS_TS3(buf[1]);
 637                 mt->vts[MT8173_TS4] = MT8173_CALIB_BUF2_VTS_TS4(buf[2]);
 638                 mt->vts[MT8173_TSABB] = MT8173_CALIB_BUF2_VTS_TSABB(buf[2]);
 639                 mt->degc_cali = MT8173_CALIB_BUF0_DEGC_CALI(buf[0]);
 640                 if (MT8173_CALIB_BUF1_ID(buf[1]) &
 641                     MT8173_CALIB_BUF0_O_SLOPE_SIGN(buf[0]))
 642                         mt->o_slope = -MT8173_CALIB_BUF0_O_SLOPE(buf[0]);
 643                 else
 644                         mt->o_slope = MT8173_CALIB_BUF0_O_SLOPE(buf[0]);
 645         } else {
 646                 dev_info(dev, "Device not calibrated, using default calibration values\n");
 647         }
 648
 649 out:
 650         kfree(buf);
 651
 652         return ret;
 653 }
 654
 655 static const struct of_device_id mtk_thermal_of_match[] = {
 656         {
 657                 .compatible = "mediatek,mt8173-thermal",
 658                 .data = (void *)&mt8173_thermal_data,
 659         },
 660         {
 661                 .compatible = "mediatek,mt2701-thermal",
 662                 .data = (void *)&mt2701_thermal_data,
 663         },
 664         {
 665                 .compatible = "mediatek,mt2712-thermal",
 666                 .data = (void *)&mt2712_thermal_data,
 667         },
 668         {
 669                 .compatible = "mediatek,mt7622-thermal",
 670                 .data = (void *)&mt7622_thermal_data,
 671         }, {
 672         },
 673 };
 674 MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
 675
 676 static int mtk_thermal_probe(struct platform_device *pdev)
 677 {
 678         int ret, i;
 679         struct device_node *auxadc, *apmixedsys, *np = pdev->dev.of_node;
 680         struct mtk_thermal *mt;
 681         struct resource *res;
 682         u64 auxadc_phys_base, apmixed_phys_base;
 683         struct thermal_zone_device *tzdev;
 684
 685         mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
 686         if (!mt)
 687                 return -ENOMEM;
 688
 689         mt->conf = of_device_get_match_data(&pdev->dev);
 690
 691         mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
 692         if (IS_ERR(mt->clk_peri_therm))
 693                 return PTR_ERR(mt->clk_peri_therm);
 694
 695         mt->clk_auxadc = devm_clk_get(&pdev->dev, "auxadc");
 696         if (IS_ERR(mt->clk_auxadc))
 697                 return PTR_ERR(mt->clk_auxadc);
 698
 699         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 700         mt->thermal_base = devm_ioremap_resource(&pdev->dev, res);
 701         if (IS_ERR(mt->thermal_base))
 702                 return PTR_ERR(mt->thermal_base);
 703
 704         ret = mtk_thermal_get_calibration_data(&pdev->dev, mt);
 705         if (ret)
 706                 return ret;
 707
 708         mutex_init(&mt->lock);
 709
 710         mt->dev = &pdev->dev;
 711
 712         auxadc = of_parse_phandle(np, "mediatek,auxadc", 0);
 713         if (!auxadc) {
 714                 dev_err(&pdev->dev, "missing auxadc node\n");
 715                 return -ENODEV;
 716         }
 717
 718         auxadc_phys_base = of_get_phys_base(auxadc);
 719
 720         of_node_put(auxadc);
 721
 722         if (auxadc_phys_base == OF_BAD_ADDR) {
 723                 dev_err(&pdev->dev, "Can't get auxadc phys address\n");
 724                 return -EINVAL;
 725         }
 726
 727         apmixedsys = of_parse_phandle(np, "mediatek,apmixedsys", 0);
 728         if (!apmixedsys) {
 729                 dev_err(&pdev->dev, "missing apmixedsys node\n");
 730                 return -ENODEV;
 731         }
 732
 733         apmixed_phys_base = of_get_phys_base(apmixedsys);
 734
 735         of_node_put(apmixedsys);
 736
 737         if (apmixed_phys_base == OF_BAD_ADDR) {
 738                 dev_err(&pdev->dev, "Can't get auxadc phys address\n");
 739                 return -EINVAL;
 740         }
 741
 742         ret = device_reset(&pdev->dev);
 743         if (ret)
 744                 return ret;
 745
 746         ret = clk_prepare_enable(mt->clk_auxadc);
 747         if (ret) {
 748                 dev_err(&pdev->dev, "Can't enable auxadc clk: %d\n", ret);
 749                 return ret;
 750         }
 751
 752         ret = clk_prepare_enable(mt->clk_peri_therm);
 753         if (ret) {
 754                 dev_err(&pdev->dev, "Can't enable peri clk: %d\n", ret);
 755                 goto err_disable_clk_auxadc;
 756         }
 757
 758         for (i = 0; i < mt->conf->num_banks; i++)
 759                 mtk_thermal_init_bank(mt, i, apmixed_phys_base,
 760                                       auxadc_phys_base);
 761
 762         platform_set_drvdata(pdev, mt);
 763
 764         tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, mt,
 765                                                      &mtk_thermal_ops);
 766         if (IS_ERR(tzdev)) {
 767                 ret = PTR_ERR(tzdev);
 768                 goto err_disable_clk_peri_therm;
 769         }
 770
 771         return 0;
 772
 773 err_disable_clk_peri_therm:
 774         clk_disable_unprepare(mt->clk_peri_therm);
 775 err_disable_clk_auxadc:
 776         clk_disable_unprepare(mt->clk_auxadc);
 777
 778         return ret;
 779 }
 780
 781 static int mtk_thermal_remove(struct platform_device *pdev)
 782 {
 783         struct mtk_thermal *mt = platform_get_drvdata(pdev);
 784
 785         clk_disable_unprepare(mt->clk_peri_therm);
 786         clk_disable_unprepare(mt->clk_auxadc);
 787
 788         return 0;
 789 }
 790
 791 static struct platform_driver mtk_thermal_driver = {
 792         .probe = mtk_thermal_probe,
 793         .remove = mtk_thermal_remove,
 794         .driver = {
 795                 .name = "mtk-thermal",
 796                 .of_match_table = mtk_thermal_of_match,
 797         },
 798 };
 799
 800 module_platform_driver(mtk_thermal_driver);
 801
 802 MODULE_AUTHOR("Louis Yu <louis.yu@mediatek.com>");
 803 MODULE_AUTHOR("Dawei Chien <dawei.chien@mediatek.com>");
 804 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 805 MODULE_AUTHOR("Hanyi Wu <hanyi.wu@mediatek.com>");
 806 MODULE_DESCRIPTION("Mediatek thermal driver");
 807 MODULE_LICENSE("GPL v2");