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 26 /** 27 * If the temperature over a period of time High, 28 * the resulting TSHUT gave CRU module,let it reset the entire chip, 29 * or via GPIO give PMIC. 30 */ 31 enum tshut_mode { 32 TSHUT_MODE_CRU = 0, 33 TSHUT_MODE_GPIO, 34 }; 35 36 /** 37 * the system Temperature Sensors tshut(tshut) polarity 38 * the bit 8 is tshut polarity. 39 * 0: low active, 1: high active 40 */ 41 enum tshut_polarity { 42 TSHUT_LOW_ACTIVE = 0, 43 TSHUT_HIGH_ACTIVE, 44 }; 45 46 /** 47 * The system has three Temperature Sensors. channel 0 is reserved, 48 * channel 1 is for CPU, and channel 2 is for GPU. 49 */ 50 enum sensor_id { 51 SENSOR_CPU = 1, 52 SENSOR_GPU, 53 }; 54 55 struct rockchip_tsadc_chip { 56 /* The hardware-controlled tshut property */ 57 long tshut_temp; 58 enum tshut_mode tshut_mode; 59 enum tshut_polarity tshut_polarity; 60 61 /* Chip-wide methods */ 62 void (*initialize)(void __iomem *reg, enum tshut_polarity p); 63 void (*irq_ack)(void __iomem *reg); 64 void (*control)(void __iomem *reg, bool on); 65 66 /* Per-sensor methods */ 67 int (*get_temp)(int chn, void __iomem *reg, long *temp); 68 void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); 69 void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); 70 }; 71 72 struct rockchip_thermal_sensor { 73 struct rockchip_thermal_data *thermal; 74 struct thermal_zone_device *tzd; 75 enum sensor_id id; 76 }; 77 78 #define NUM_SENSORS 2 /* Ignore unused sensor 0 */ 79 80 struct rockchip_thermal_data { 81 const struct rockchip_tsadc_chip *chip; 82 struct platform_device *pdev; 83 struct reset_control *reset; 84 85 struct rockchip_thermal_sensor sensors[NUM_SENSORS]; 86 87 struct clk *clk; 88 struct clk *pclk; 89 90 void __iomem *regs; 91 92 long tshut_temp; 93 enum tshut_mode tshut_mode; 94 enum tshut_polarity tshut_polarity; 95 }; 96 97 /* TSADC V2 Sensor info define: */ 98 #define TSADCV2_AUTO_CON 0x04 99 #define TSADCV2_INT_EN 0x08 100 #define TSADCV2_INT_PD 0x0c 101 #define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04) 102 #define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04) 103 #define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 104 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 105 #define TSADCV2_AUTO_PERIOD 0x68 106 #define TSADCV2_AUTO_PERIOD_HT 0x6c 107 108 #define TSADCV2_AUTO_EN BIT(0) 109 #define TSADCV2_AUTO_DISABLE ~BIT(0) 110 #define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn)) 111 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) 112 #define TSADCV2_AUTO_TSHUT_POLARITY_LOW ~BIT(8) 113 114 #define TSADCV2_INT_SRC_EN(chn) BIT(chn) 115 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn)) 116 #define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn)) 117 118 #define TSADCV2_INT_PD_CLEAR ~BIT(8) 119 120 #define TSADCV2_DATA_MASK 0xfff 121 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 122 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 123 #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */ 124 #define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */ 125 126 struct tsadc_table { 127 unsigned long code; 128 long temp; 129 }; 130 131 static const struct tsadc_table v2_code_table[] = { 132 {TSADCV2_DATA_MASK, -40000}, 133 {3800, -40000}, 134 {3792, -35000}, 135 {3783, -30000}, 136 {3774, -25000}, 137 {3765, -20000}, 138 {3756, -15000}, 139 {3747, -10000}, 140 {3737, -5000}, 141 {3728, 0}, 142 {3718, 5000}, 143 {3708, 10000}, 144 {3698, 15000}, 145 {3688, 20000}, 146 {3678, 25000}, 147 {3667, 30000}, 148 {3656, 35000}, 149 {3645, 40000}, 150 {3634, 45000}, 151 {3623, 50000}, 152 {3611, 55000}, 153 {3600, 60000}, 154 {3588, 65000}, 155 {3575, 70000}, 156 {3563, 75000}, 157 {3550, 80000}, 158 {3537, 85000}, 159 {3524, 90000}, 160 {3510, 95000}, 161 {3496, 100000}, 162 {3482, 105000}, 163 {3467, 110000}, 164 {3452, 115000}, 165 {3437, 120000}, 166 {3421, 125000}, 167 {0, 125000}, 168 }; 169 170 static u32 rk_tsadcv2_temp_to_code(long temp) 171 { 172 int high, low, mid; 173 174 low = 0; 175 high = ARRAY_SIZE(v2_code_table) - 1; 176 mid = (high + low) / 2; 177 178 if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) 179 return 0; 180 181 while (low <= high) { 182 if (temp == v2_code_table[mid].temp) 183 return v2_code_table[mid].code; 184 else if (temp < v2_code_table[mid].temp) 185 high = mid - 1; 186 else 187 low = mid + 1; 188 mid = (low + high) / 2; 189 } 190 191 return 0; 192 } 193 194 static long rk_tsadcv2_code_to_temp(u32 code) 195 { 196 unsigned int low = 0; 197 unsigned int high = ARRAY_SIZE(v2_code_table) - 1; 198 unsigned int mid = (low + high) / 2; 199 unsigned int num; 200 unsigned long denom; 201 202 /* Invalid code, return -EAGAIN */ 203 if (code > TSADCV2_DATA_MASK) 204 return -EAGAIN; 205 206 while (low <= high && mid) { 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 return v2_code_table[mid - 1].temp + (num / denom); 227 } 228 229 /** 230 * rk_tsadcv2_initialize - initialize TASDC Controller 231 * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between 232 * every two accessing of TSADC in normal operation. 233 * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between 234 * every two accessing of TSADC after the temperature is higher 235 * than COM_SHUT or COM_INT. 236 * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE, 237 * if the temperature is higher than COMP_INT or COMP_SHUT for 238 * "debounce" times, TSADC controller will generate interrupt or TSHUT. 239 */ 240 static void rk_tsadcv2_initialize(void __iomem *regs, 241 enum tshut_polarity tshut_polarity) 242 { 243 if (tshut_polarity == TSHUT_HIGH_ACTIVE) 244 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH), 245 regs + TSADCV2_AUTO_CON); 246 else 247 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW), 248 regs + TSADCV2_AUTO_CON); 249 250 writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); 251 writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, 252 regs + TSADCV2_HIGHT_INT_DEBOUNCE); 253 writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, 254 regs + TSADCV2_AUTO_PERIOD_HT); 255 writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, 256 regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); 257 } 258 259 static void rk_tsadcv2_irq_ack(void __iomem *regs) 260 { 261 u32 val; 262 263 val = readl_relaxed(regs + TSADCV2_INT_PD); 264 writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD); 265 } 266 267 static void rk_tsadcv2_control(void __iomem *regs, bool enable) 268 { 269 u32 val; 270 271 val = readl_relaxed(regs + TSADCV2_AUTO_CON); 272 if (enable) 273 val |= TSADCV2_AUTO_EN; 274 else 275 val &= ~TSADCV2_AUTO_EN; 276 277 writel_relaxed(val, regs + TSADCV2_AUTO_CON); 278 } 279 280 static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, long *temp) 281 { 282 u32 val; 283 284 /* the A/D value of the channel last conversion need some time */ 285 val = readl_relaxed(regs + TSADCV2_DATA(chn)); 286 if (val == 0) 287 return -EAGAIN; 288 289 *temp = rk_tsadcv2_code_to_temp(val); 290 291 return 0; 292 } 293 294 static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) 295 { 296 u32 tshut_value, val; 297 298 tshut_value = rk_tsadcv2_temp_to_code(temp); 299 writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); 300 301 /* TSHUT will be valid */ 302 val = readl_relaxed(regs + TSADCV2_AUTO_CON); 303 writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON); 304 } 305 306 static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs, 307 enum tshut_mode mode) 308 { 309 u32 val; 310 311 val = readl_relaxed(regs + TSADCV2_INT_EN); 312 if (mode == TSHUT_MODE_GPIO) { 313 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn); 314 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn); 315 } else { 316 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn); 317 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn); 318 } 319 320 writel_relaxed(val, regs + TSADCV2_INT_EN); 321 } 322 323 static const struct rockchip_tsadc_chip rk3288_tsadc_data = { 324 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ 325 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ 326 .tshut_temp = 95000, 327 328 .initialize = rk_tsadcv2_initialize, 329 .irq_ack = rk_tsadcv2_irq_ack, 330 .control = rk_tsadcv2_control, 331 .get_temp = rk_tsadcv2_get_temp, 332 .set_tshut_temp = rk_tsadcv2_tshut_temp, 333 .set_tshut_mode = rk_tsadcv2_tshut_mode, 334 }; 335 336 static const struct of_device_id of_rockchip_thermal_match[] = { 337 { 338 .compatible = "rockchip,rk3288-tsadc", 339 .data = (void *)&rk3288_tsadc_data, 340 }, 341 { /* end */ }, 342 }; 343 MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); 344 345 static void 346 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on) 347 { 348 struct thermal_zone_device *tzd = sensor->tzd; 349 350 tzd->ops->set_mode(tzd, 351 on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); 352 } 353 354 static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) 355 { 356 struct rockchip_thermal_data *thermal = dev; 357 int i; 358 359 dev_dbg(&thermal->pdev->dev, "thermal alarm\n"); 360 361 thermal->chip->irq_ack(thermal->regs); 362 363 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 364 thermal_zone_device_update(thermal->sensors[i].tzd); 365 366 return IRQ_HANDLED; 367 } 368 369 static int rockchip_thermal_get_temp(void *_sensor, long *out_temp) 370 { 371 struct rockchip_thermal_sensor *sensor = _sensor; 372 struct rockchip_thermal_data *thermal = sensor->thermal; 373 const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip; 374 int retval; 375 376 retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp); 377 dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %ld, retval: %d\n", 378 sensor->id, *out_temp, retval); 379 380 return retval; 381 } 382 383 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = { 384 .get_temp = rockchip_thermal_get_temp, 385 }; 386 387 static int rockchip_configure_from_dt(struct device *dev, 388 struct device_node *np, 389 struct rockchip_thermal_data *thermal) 390 { 391 u32 shut_temp, tshut_mode, tshut_polarity; 392 393 if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) { 394 dev_warn(dev, 395 "Missing tshut temp property, using default %ld\n", 396 thermal->chip->tshut_temp); 397 thermal->tshut_temp = thermal->chip->tshut_temp; 398 } else { 399 thermal->tshut_temp = shut_temp; 400 } 401 402 if (thermal->tshut_temp > INT_MAX) { 403 dev_err(dev, "Invalid tshut temperature specified: %ld\n", 404 thermal->tshut_temp); 405 return -ERANGE; 406 } 407 408 if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) { 409 dev_warn(dev, 410 "Missing tshut mode property, using default (%s)\n", 411 thermal->chip->tshut_mode == TSHUT_MODE_GPIO ? 412 "gpio" : "cru"); 413 thermal->tshut_mode = thermal->chip->tshut_mode; 414 } else { 415 thermal->tshut_mode = tshut_mode; 416 } 417 418 if (thermal->tshut_mode > 1) { 419 dev_err(dev, "Invalid tshut mode specified: %d\n", 420 thermal->tshut_mode); 421 return -EINVAL; 422 } 423 424 if (of_property_read_u32(np, "rockchip,hw-tshut-polarity", 425 &tshut_polarity)) { 426 dev_warn(dev, 427 "Missing tshut-polarity property, using default (%s)\n", 428 thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ? 429 "low" : "high"); 430 thermal->tshut_polarity = thermal->chip->tshut_polarity; 431 } else { 432 thermal->tshut_polarity = tshut_polarity; 433 } 434 435 if (thermal->tshut_polarity > 1) { 436 dev_err(dev, "Invalid tshut-polarity specified: %d\n", 437 thermal->tshut_polarity); 438 return -EINVAL; 439 } 440 441 return 0; 442 } 443 444 static int 445 rockchip_thermal_register_sensor(struct platform_device *pdev, 446 struct rockchip_thermal_data *thermal, 447 struct rockchip_thermal_sensor *sensor, 448 enum sensor_id id) 449 { 450 const struct rockchip_tsadc_chip *tsadc = thermal->chip; 451 int error; 452 453 tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); 454 tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp); 455 456 sensor->thermal = thermal; 457 sensor->id = id; 458 sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor, 459 &rockchip_of_thermal_ops); 460 if (IS_ERR(sensor->tzd)) { 461 error = PTR_ERR(sensor->tzd); 462 dev_err(&pdev->dev, "failed to register sensor %d: %d\n", 463 id, error); 464 return error; 465 } 466 467 return 0; 468 } 469 470 /* 471 * Reset TSADC Controller, reset all tsadc registers. 472 */ 473 static void rockchip_thermal_reset_controller(struct reset_control *reset) 474 { 475 reset_control_assert(reset); 476 usleep_range(10, 20); 477 reset_control_deassert(reset); 478 } 479 480 static int rockchip_thermal_probe(struct platform_device *pdev) 481 { 482 struct device_node *np = pdev->dev.of_node; 483 struct rockchip_thermal_data *thermal; 484 const struct of_device_id *match; 485 struct resource *res; 486 int irq; 487 int i; 488 int error; 489 490 match = of_match_node(of_rockchip_thermal_match, np); 491 if (!match) 492 return -ENXIO; 493 494 irq = platform_get_irq(pdev, 0); 495 if (irq < 0) { 496 dev_err(&pdev->dev, "no irq resource?\n"); 497 return -EINVAL; 498 } 499 500 thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), 501 GFP_KERNEL); 502 if (!thermal) 503 return -ENOMEM; 504 505 thermal->pdev = pdev; 506 507 thermal->chip = (const struct rockchip_tsadc_chip *)match->data; 508 if (!thermal->chip) 509 return -EINVAL; 510 511 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 512 thermal->regs = devm_ioremap_resource(&pdev->dev, res); 513 if (IS_ERR(thermal->regs)) 514 return PTR_ERR(thermal->regs); 515 516 thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb"); 517 if (IS_ERR(thermal->reset)) { 518 error = PTR_ERR(thermal->reset); 519 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error); 520 return error; 521 } 522 523 thermal->clk = devm_clk_get(&pdev->dev, "tsadc"); 524 if (IS_ERR(thermal->clk)) { 525 error = PTR_ERR(thermal->clk); 526 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error); 527 return error; 528 } 529 530 thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); 531 if (IS_ERR(thermal->pclk)) { 532 error = PTR_ERR(thermal->clk); 533 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n", 534 error); 535 return error; 536 } 537 538 error = clk_prepare_enable(thermal->clk); 539 if (error) { 540 dev_err(&pdev->dev, "failed to enable converter clock: %d\n", 541 error); 542 return error; 543 } 544 545 error = clk_prepare_enable(thermal->pclk); 546 if (error) { 547 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error); 548 goto err_disable_clk; 549 } 550 551 rockchip_thermal_reset_controller(thermal->reset); 552 553 error = rockchip_configure_from_dt(&pdev->dev, np, thermal); 554 if (error) { 555 dev_err(&pdev->dev, "failed to parse device tree data: %d\n", 556 error); 557 goto err_disable_pclk; 558 } 559 560 thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); 561 562 error = rockchip_thermal_register_sensor(pdev, thermal, 563 &thermal->sensors[0], 564 SENSOR_CPU); 565 if (error) { 566 dev_err(&pdev->dev, 567 "failed to register CPU thermal sensor: %d\n", error); 568 goto err_disable_pclk; 569 } 570 571 error = rockchip_thermal_register_sensor(pdev, thermal, 572 &thermal->sensors[1], 573 SENSOR_GPU); 574 if (error) { 575 dev_err(&pdev->dev, 576 "failed to register GPU thermal sensor: %d\n", error); 577 goto err_unregister_cpu_sensor; 578 } 579 580 error = devm_request_threaded_irq(&pdev->dev, irq, NULL, 581 &rockchip_thermal_alarm_irq_thread, 582 IRQF_ONESHOT, 583 "rockchip_thermal", thermal); 584 if (error) { 585 dev_err(&pdev->dev, 586 "failed to request tsadc irq: %d\n", error); 587 goto err_unregister_gpu_sensor; 588 } 589 590 thermal->chip->control(thermal->regs, true); 591 592 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 593 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); 594 595 platform_set_drvdata(pdev, thermal); 596 597 return 0; 598 599 err_unregister_gpu_sensor: 600 thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd); 601 err_unregister_cpu_sensor: 602 thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd); 603 err_disable_pclk: 604 clk_disable_unprepare(thermal->pclk); 605 err_disable_clk: 606 clk_disable_unprepare(thermal->clk); 607 608 return error; 609 } 610 611 static int rockchip_thermal_remove(struct platform_device *pdev) 612 { 613 struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 614 int i; 615 616 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { 617 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i]; 618 619 rockchip_thermal_toggle_sensor(sensor, false); 620 thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd); 621 } 622 623 thermal->chip->control(thermal->regs, false); 624 625 clk_disable_unprepare(thermal->pclk); 626 clk_disable_unprepare(thermal->clk); 627 628 return 0; 629 } 630 631 static int __maybe_unused rockchip_thermal_suspend(struct device *dev) 632 { 633 struct platform_device *pdev = to_platform_device(dev); 634 struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 635 int i; 636 637 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 638 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false); 639 640 thermal->chip->control(thermal->regs, false); 641 642 clk_disable(thermal->pclk); 643 clk_disable(thermal->clk); 644 645 return 0; 646 } 647 648 static int __maybe_unused rockchip_thermal_resume(struct device *dev) 649 { 650 struct platform_device *pdev = to_platform_device(dev); 651 struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); 652 int i; 653 int error; 654 655 error = clk_enable(thermal->clk); 656 if (error) 657 return error; 658 659 error = clk_enable(thermal->pclk); 660 if (error) 661 return error; 662 663 rockchip_thermal_reset_controller(thermal->reset); 664 665 thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); 666 667 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { 668 enum sensor_id id = thermal->sensors[i].id; 669 670 thermal->chip->set_tshut_mode(id, thermal->regs, 671 thermal->tshut_mode); 672 thermal->chip->set_tshut_temp(id, thermal->regs, 673 thermal->tshut_temp); 674 } 675 676 thermal->chip->control(thermal->regs, true); 677 678 for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) 679 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); 680 681 return 0; 682 } 683 684 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, 685 rockchip_thermal_suspend, rockchip_thermal_resume); 686 687 static struct platform_driver rockchip_thermal_driver = { 688 .driver = { 689 .name = "rockchip-thermal", 690 .pm = &rockchip_thermal_pm_ops, 691 .of_match_table = of_rockchip_thermal_match, 692 }, 693 .probe = rockchip_thermal_probe, 694 .remove = rockchip_thermal_remove, 695 }; 696 697 module_platform_driver(rockchip_thermal_driver); 698 699 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); 700 MODULE_AUTHOR("Rockchip, Inc."); 701 MODULE_LICENSE("GPL v2"); 702 MODULE_ALIAS("platform:rockchip-thermal"); 703