1 /* 2 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 */ 13 14 #include <linux/clk.h> 15 #include <linux/delay.h> 16 #include <linux/interrupt.h> 17 #include <linux/io.h> 18 #include <linux/module.h> 19 #include <linux/of.h> 20 #include <linux/of_address.h> 21 #include <linux/of_irq.h> 22 #include <linux/platform_device.h> 23 #include <linux/reset.h> 24 #include <linux/thermal.h> 25 #include <linux/pinctrl/consumer.h> 26 27 /** 28 * If the temperature over a period of time High, 29 * the resulting TSHUT gave CRU module,let it reset the entire chip, 30 * or via GPIO give PMIC. 31 */ 32 enum tshut_mode { 33 TSHUT_MODE_CRU = 0, 34 TSHUT_MODE_GPIO, 35 }; 36 37 /** 38 * the system Temperature Sensors tshut(tshut) polarity 39 * the bit 8 is tshut polarity. 40 * 0: low active, 1: high active 41 */ 42 enum tshut_polarity { 43 TSHUT_LOW_ACTIVE = 0, 44 TSHUT_HIGH_ACTIVE, 45 }; 46 47 /** 48 * The system has three Temperature Sensors. channel 0 is reserved, 49 * channel 1 is for CPU, and channel 2 is for GPU. 50 */ 51 enum sensor_id { 52 SENSOR_CPU = 1, 53 SENSOR_GPU, 54 }; 55 56 struct rockchip_tsadc_chip { 57 /* The hardware-controlled tshut property */ 58 long tshut_temp; 59 enum tshut_mode tshut_mode; 60 enum tshut_polarity tshut_polarity; 61 62 /* Chip-wide methods */ 63 void (*initialize)(void __iomem *reg, enum tshut_polarity p); 64 void (*irq_ack)(void __iomem *reg); 65 void (*control)(void __iomem *reg, bool on); 66 67 /* Per-sensor methods */ 68 int (*get_temp)(int chn, void __iomem *reg, int *temp); 69 void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); 70 void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); 71 }; 72 73 struct rockchip_thermal_sensor { 74 struct rockchip_thermal_data *thermal; 75 struct thermal_zone_device *tzd; 76 enum sensor_id id; 77 }; 78 79 #define NUM_SENSORS 2 /* Ignore unused sensor 0 */ 80 81 struct rockchip_thermal_data { 82 const struct rockchip_tsadc_chip *chip; 83 struct platform_device *pdev; 84 struct reset_control *reset; 85 86 struct rockchip_thermal_sensor sensors[NUM_SENSORS]; 87 88 struct clk *clk; 89 struct clk *pclk; 90 91 void __iomem *regs; 92 93 long tshut_temp; 94 enum tshut_mode tshut_mode; 95 enum tshut_polarity tshut_polarity; 96 }; 97 98 /* TSADC V2 Sensor info define: */ 99 #define TSADCV2_AUTO_CON 0x04 100 #define TSADCV2_INT_EN 0x08 101 #define TSADCV2_INT_PD 0x0c 102 #define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04) 103 #define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04) 104 #define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 105 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 106 #define TSADCV2_AUTO_PERIOD 0x68 107 #define TSADCV2_AUTO_PERIOD_HT 0x6c 108 109 #define TSADCV2_AUTO_EN BIT(0) 110 #define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn)) 111 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) 112 113 #define TSADCV2_INT_SRC_EN(chn) BIT(chn) 114 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn)) 115 #define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn)) 116 117 #define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8) 118 119 #define TSADCV2_DATA_MASK 0xfff 120 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 121 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 122 #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */ 123 #define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */ 124 125 struct tsadc_table { 126 u32 code; 127 long temp; 128 }; 129 130 static const struct tsadc_table v2_code_table[] = { 131 {TSADCV2_DATA_MASK, -40000}, 132 {3800, -40000}, 133 {3792, -35000}, 134 {3783, -30000}, 135 {3774, -25000}, 136 {3765, -20000}, 137 {3756, -15000}, 138 {3747, -10000}, 139 {3737, -5000}, 140 {3728, 0}, 141 {3718, 5000}, 142 {3708, 10000}, 143 {3698, 15000}, 144 {3688, 20000}, 145 {3678, 25000}, 146 {3667, 30000}, 147 {3656, 35000}, 148 {3645, 40000}, 149 {3634, 45000}, 150 {3623, 50000}, 151 {3611, 55000}, 152 {3600, 60000}, 153 {3588, 65000}, 154 {3575, 70000}, 155 {3563, 75000}, 156 {3550, 80000}, 157 {3537, 85000}, 158 {3524, 90000}, 159 {3510, 95000}, 160 {3496, 100000}, 161 {3482, 105000}, 162 {3467, 110000}, 163 {3452, 115000}, 164 {3437, 120000}, 165 {3421, 125000}, 166 }; 167 168 static u32 rk_tsadcv2_temp_to_code(long temp) 169 { 170 int high, low, mid; 171 172 low = 0; 173 high = ARRAY_SIZE(v2_code_table) - 1; 174 mid = (high + low) / 2; 175 176 if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) 177 return 0; 178 179 while (low <= high) { 180 if (temp == v2_code_table[mid].temp) 181 return v2_code_table[mid].code; 182 else if (temp < v2_code_table[mid].temp) 183 high = mid - 1; 184 else 185 low = mid + 1; 186 mid = (low + high) / 2; 187 } 188 189 return 0; 190 } 191 192 static int rk_tsadcv2_code_to_temp(u32 code, int *temp) 193 { 194 unsigned int low = 1; 195 unsigned int high = ARRAY_SIZE(v2_code_table) - 1; 196 unsigned int mid = (low + high) / 2; 197 unsigned int num; 198 unsigned long denom; 199 200 BUILD_BUG_ON(ARRAY_SIZE(v2_code_table) < 2); 201 202 code &= TSADCV2_DATA_MASK; 203 if (code < v2_code_table[high].code) 204 return -EAGAIN; /* Incorrect reading */ 205 206 while (low <= high) { 207 if (code >= v2_code_table[mid].code && 208 code < v2_code_table[mid - 1].code) 209 break; 210 else if (code < v2_code_table[mid].code) 211 low = mid + 1; 212 else 213 high = mid - 1; 214 mid = (low + high) / 2; 215 } 216 217 /* 218 * The 5C granularity provided by the table is too much. Let's 219 * assume that the relationship between sensor readings and 220 * temperature between 2 table entries is linear and interpolate 221 * to produce less granular result. 222 */ 223 num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp; 224 num *= v2_code_table[mid - 1].code - code; 225 denom = v2_code_table[mid - 1].code - v2_code_table[mid].code; 226 *temp = v2_code_table[mid - 1].temp + (num / denom); 227 228 return 0; 229 } 230 231 /** 232 * rk_tsadcv2_initialize - initialize TASDC Controller 233 * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between 234 * every two accessing of TSADC in normal operation. 235 * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between 236 * every two accessing of TSADC after the temperature is higher 237 * than COM_SHUT or COM_INT. 238 * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE, 239 * if the temperature is higher than COMP_INT or COMP_SHUT for 240 * "debounce" times, TSADC controller will generate interrupt or TSHUT. 241 */ 242 static void rk_tsadcv2_initialize(void __iomem *regs, 243 enum tshut_polarity tshut_polarity) 244 { 245 if (tshut_polarity == TSHUT_HIGH_ACTIVE) 246 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, 247 regs + TSADCV2_AUTO_CON); 248 else 249 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH, 250 regs + TSADCV2_AUTO_CON); 251 252 writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); 253 writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, 254 regs + TSADCV2_HIGHT_INT_DEBOUNCE); 255 writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, 256 regs + TSADCV2_AUTO_PERIOD_HT); 257 writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, 258 regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); 259 } 260 261 static void rk_tsadcv2_irq_ack(void __iomem *regs) 262 { 263 u32 val; 264 265 val = readl_relaxed(regs + TSADCV2_INT_PD); 266 writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD); 267 } 268 269 static void rk_tsadcv2_control(void __iomem *regs, bool enable) 270 { 271 u32 val; 272 273 val = readl_relaxed(regs + TSADCV2_AUTO_CON); 274 if (enable) 275 val |= TSADCV2_AUTO_EN; 276 else 277 val &= ~TSADCV2_AUTO_EN; 278 279 writel_relaxed(val, regs + TSADCV2_AUTO_CON); 280 } 281 282 static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) 283 { 284 u32 val; 285 286 val = readl_relaxed(regs + TSADCV2_DATA(chn)); 287 288 return rk_tsadcv2_code_to_temp(val, temp); 289 } 290 291 static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) 292 { 293 u32 tshut_value, val; 294 295 tshut_value = rk_tsadcv2_temp_to_code(temp); 296 writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); 297 298 /* TSHUT will be valid */ 299 val = readl_relaxed(regs + TSADCV2_AUTO_CON); 300 writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON); 301 } 302 303 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs, 304 enum tshut_mode mode) 305 { 306 u32 val; 307 308 val = readl_relaxed(regs + TSADCV2_INT_EN); 309 if (mode == TSHUT_MODE_GPIO) { 310 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn); 311 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn); 312 } else { 313 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn); 314 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn); 315 } 316 317 writel_relaxed(val, regs + TSADCV2_INT_EN); 318 } 319 320 static const struct rockchip_tsadc_chip rk3288_tsadc_data = { 321 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ 322 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ 323 .tshut_temp = 95000, 324 325 .initialize = rk_tsadcv2_initialize, 326 .irq_ack = rk_tsadcv2_irq_ack, 327 .control = rk_tsadcv2_control, 328 .get_temp = rk_tsadcv2_get_temp, 329 .set_tshut_temp = rk_tsadcv2_tshut_temp, 330 .set_tshut_mode = rk_tsadcv2_tshut_mode, 331 }; 332 333 static const struct of_device_id of_rockchip_thermal_match[] = { 334 { 335 .compatible = "rockchip,rk3288-tsadc", 336 .data = (void *)&rk3288_tsadc_data, 337 }, 338 { /* end */ }, 339 }; 340 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); 341 342 static void 343 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on) 344 { 345 struct thermal_zone_device *tzd = sensor->tzd; 346 347 tzd->ops->set_mode(tzd, 348 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); 349 } 350 351 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) 352 { 353 struct rockchip_thermal_data *thermal = dev; 354 int i; 355 356 dev_dbg(&thermal->pdev->dev, "thermal alarm\n"); 357 358 thermal->chip->irq_ack(thermal->regs); 359 360 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 361 thermal_zone_device_update(thermal->sensors[i].tzd); 362 363 return IRQ_HANDLED; 364 } 365 366 static int rockchip_thermal_get_temp(void *_sensor, int *out_temp) 367 { 368 struct rockchip_thermal_sensor *sensor = _sensor; 369 struct rockchip_thermal_data *thermal = sensor->thermal; 370 const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip; 371 int retval; 372 373 retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp); 374 dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n", 375 sensor->id, *out_temp, retval); 376 377 return retval; 378 } 379 380 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = { 381 .get_temp = rockchip_thermal_get_temp, 382 }; 383 384 static int rockchip_configure_from_dt(struct device *dev, 385 struct device_node *np, 386 struct rockchip_thermal_data *thermal) 387 { 388 u32 shut_temp, tshut_mode, tshut_polarity; 389 390 if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) { 391 dev_warn(dev, 392 "Missing tshut temp property, using default %ld\n", 393 thermal->chip->tshut_temp); 394 thermal->tshut_temp = thermal->chip->tshut_temp; 395 } else { 396 thermal->tshut_temp = shut_temp; 397 } 398 399 if (thermal->tshut_temp > INT_MAX) { 400 dev_err(dev, "Invalid tshut temperature specified: %ld\n", 401 thermal->tshut_temp); 402 return -ERANGE; 403 } 404 405 if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) { 406 dev_warn(dev, 407 "Missing tshut mode property, using default (%s)\n", 408 thermal->chip->tshut_mode == TSHUT_MODE_GPIO ? 409 "gpio" : "cru"); 410 thermal->tshut_mode = thermal->chip->tshut_mode; 411 } else { 412 thermal->tshut_mode = tshut_mode; 413 } 414 415 if (thermal->tshut_mode > 1) { 416 dev_err(dev, "Invalid tshut mode specified: %d\n", 417 thermal->tshut_mode); 418 return -EINVAL; 419 } 420 421 if (of_property_read_u32(np, "rockchip,hw-tshut-polarity", 422 &tshut_polarity)) { 423 dev_warn(dev, 424 "Missing tshut-polarity property, using default (%s)\n", 425 thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ? 426 "low" : "high"); 427 thermal->tshut_polarity = thermal->chip->tshut_polarity; 428 } else { 429 thermal->tshut_polarity = tshut_polarity; 430 } 431 432 if (thermal->tshut_polarity > 1) { 433 dev_err(dev, "Invalid tshut-polarity specified: %d\n", 434 thermal->tshut_polarity); 435 return -EINVAL; 436 } 437 438 return 0; 439 } 440 441 static int 442 rockchip_thermal_register_sensor(struct platform_device *pdev, 443 struct rockchip_thermal_data *thermal, 444 struct rockchip_thermal_sensor *sensor, 445 enum sensor_id id) 446 { 447 const struct rockchip_tsadc_chip *tsadc = thermal->chip; 448 int error; 449 450 tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); 451 tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp); 452 453 sensor->thermal = thermal; 454 sensor->id = id; 455 sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor, 456 &rockchip_of_thermal_ops); 457 if (IS_ERR(sensor->tzd)) { 458 error = PTR_ERR(sensor->tzd); 459 dev_err(&pdev->dev, "failed to register sensor %d: %d\n", 460 id, error); 461 return error; 462 } 463 464 return 0; 465 } 466 467 /* 468 * Reset TSADC Controller, reset all tsadc registers. 469 */ 470 static void rockchip_thermal_reset_controller(struct reset_control *reset) 471 { 472 reset_control_assert(reset); 473 usleep_range(10, 20); 474 reset_control_deassert(reset); 475 } 476 477 static int rockchip_thermal_probe(struct platform_device *pdev) 478 { 479 struct device_node *np = pdev->dev.of_node; 480 struct rockchip_thermal_data *thermal; 481 const struct of_device_id *match; 482 struct resource *res; 483 int irq; 484 int i; 485 int error; 486 487 match = of_match_node(of_rockchip_thermal_match, np); 488 if (!match) 489 return -ENXIO; 490 491 irq = platform_get_irq(pdev, 0); 492 if (irq < 0) { 493 dev_err(&pdev->dev, "no irq resource?\n"); 494 return -EINVAL; 495 } 496 497 thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), 498 GFP_KERNEL); 499 if (!thermal) 500 return -ENOMEM; 501 502 thermal->pdev = pdev; 503 504 thermal->chip = (const struct rockchip_tsadc_chip *)match->data; 505 if (!thermal->chip) 506 return -EINVAL; 507 508 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 509 thermal->regs = devm_ioremap_resource(&pdev->dev, res); 510 if (IS_ERR(thermal->regs)) 511 return PTR_ERR(thermal->regs); 512 513 thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb"); 514 if (IS_ERR(thermal->reset)) { 515 error = PTR_ERR(thermal->reset); 516 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error); 517 return error; 518 } 519 520 thermal->clk = devm_clk_get(&pdev->dev, "tsadc"); 521 if (IS_ERR(thermal->clk)) { 522 error = PTR_ERR(thermal->clk); 523 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error); 524 return error; 525 } 526 527 thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); 528 if (IS_ERR(thermal->pclk)) { 529 error = PTR_ERR(thermal->pclk); 530 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n", 531 error); 532 return error; 533 } 534 535 error = clk_prepare_enable(thermal->clk); 536 if (error) { 537 dev_err(&pdev->dev, "failed to enable converter clock: %d\n", 538 error); 539 return error; 540 } 541 542 error = clk_prepare_enable(thermal->pclk); 543 if (error) { 544 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error); 545 goto err_disable_clk; 546 } 547 548 rockchip_thermal_reset_controller(thermal->reset); 549 550 error = rockchip_configure_from_dt(&pdev->dev, np, thermal); 551 if (error) { 552 dev_err(&pdev->dev, "failed to parse device tree data: %d\n", 553 error); 554 goto err_disable_pclk; 555 } 556 557 thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); 558 559 error = rockchip_thermal_register_sensor(pdev, thermal, 560 &thermal->sensors[0], 561 SENSOR_CPU); 562 if (error) { 563 dev_err(&pdev->dev, 564 "failed to register CPU thermal sensor: %d\n", error); 565 goto err_disable_pclk; 566 } 567 568 error = rockchip_thermal_register_sensor(pdev, thermal, 569 &thermal->sensors[1], 570 SENSOR_GPU); 571 if (error) { 572 dev_err(&pdev->dev, 573 "failed to register GPU thermal sensor: %d\n", error); 574 goto err_unregister_cpu_sensor; 575 } 576 577 error = devm_request_threaded_irq(&pdev->dev, irq, NULL, 578 &rockchip_thermal_alarm_irq_thread, 579 IRQF_ONESHOT, 580 "rockchip_thermal", thermal); 581 if (error) { 582 dev_err(&pdev->dev, 583 "failed to request tsadc irq: %d\n", error); 584 goto err_unregister_gpu_sensor; 585 } 586 587 thermal->chip->control(thermal->regs, true); 588 589 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 590 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); 591 592 platform_set_drvdata(pdev, thermal); 593 594 return 0; 595 596 err_unregister_gpu_sensor: 597 thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd); 598 err_unregister_cpu_sensor: 599 thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd); 600 err_disable_pclk: 601 clk_disable_unprepare(thermal->pclk); 602 err_disable_clk: 603 clk_disable_unprepare(thermal->clk); 604 605 return error; 606 } 607 608 static int rockchip_thermal_remove(struct platform_device *pdev) 609 { 610 struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 611 int i; 612 613 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { 614 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i]; 615 616 rockchip_thermal_toggle_sensor(sensor, false); 617 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd); 618 } 619 620 thermal->chip->control(thermal->regs, false); 621 622 clk_disable_unprepare(thermal->pclk); 623 clk_disable_unprepare(thermal->clk); 624 625 return 0; 626 } 627 628 static int __maybe_unused rockchip_thermal_suspend(struct device *dev) 629 { 630 struct platform_device *pdev = to_platform_device(dev); 631 struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 632 int i; 633 634 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 635 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false); 636 637 thermal->chip->control(thermal->regs, false); 638 639 clk_disable(thermal->pclk); 640 clk_disable(thermal->clk); 641 642 pinctrl_pm_select_sleep_state(dev); 643 644 return 0; 645 } 646 647 static int __maybe_unused rockchip_thermal_resume(struct device *dev) 648 { 649 struct platform_device *pdev = to_platform_device(dev); 650 struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 651 int i; 652 int error; 653 654 error = clk_enable(thermal->clk); 655 if (error) 656 return error; 657 658 error = clk_enable(thermal->pclk); 659 if (error) 660 return error; 661 662 rockchip_thermal_reset_controller(thermal->reset); 663 664 thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); 665 666 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { 667 enum sensor_id id = thermal->sensors[i].id; 668 669 thermal->chip->set_tshut_mode(id, thermal->regs, 670 thermal->tshut_mode); 671 thermal->chip->set_tshut_temp(id, thermal->regs, 672 thermal->tshut_temp); 673 } 674 675 thermal->chip->control(thermal->regs, true); 676 677 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 678 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); 679 680 pinctrl_pm_select_default_state(dev); 681 682 return 0; 683 } 684 685 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, 686 rockchip_thermal_suspend, rockchip_thermal_resume); 687 688 static struct platform_driver rockchip_thermal_driver = { 689 .driver = { 690 .name = "rockchip-thermal", 691 .pm = &rockchip_thermal_pm_ops, 692 .of_match_table = of_rockchip_thermal_match, 693 }, 694 .probe = rockchip_thermal_probe, 695 .remove = rockchip_thermal_remove, 696 }; 697 698 module_platform_driver(rockchip_thermal_driver); 699 700 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); 701 MODULE_AUTHOR("Rockchip, Inc."); 702 MODULE_LICENSE("GPL v2"); 703 MODULE_ALIAS("platform:rockchip-thermal"); 704