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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 | // SPDX-License-Identifier: GPL-2.0-only /* * HiSilicon thermal sensor driver * * Copyright (c) 2014-2015 HiSilicon Limited. * Copyright (c) 2014-2015 Linaro Limited. * * Xinwei Kong <kong.kongxinwei@hisilicon.com> * Leo Yan <leo.yan@linaro.org> */ #include <linux/cpufreq.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/of_device.h> #include "thermal_core.h" #define HI6220_TEMP0_LAG (0x0) #define HI6220_TEMP0_TH (0x4) #define HI6220_TEMP0_RST_TH (0x8) #define HI6220_TEMP0_CFG (0xC) #define HI6220_TEMP0_CFG_SS_MSK (0xF000) #define HI6220_TEMP0_CFG_HDAK_MSK (0x30) #define HI6220_TEMP0_EN (0x10) #define HI6220_TEMP0_INT_EN (0x14) #define HI6220_TEMP0_INT_CLR (0x18) #define HI6220_TEMP0_RST_MSK (0x1C) #define HI6220_TEMP0_VALUE (0x28) #define HI3660_OFFSET(chan) ((chan) * 0x40) #define HI3660_TEMP(chan) (HI3660_OFFSET(chan) + 0x1C) #define HI3660_TH(chan) (HI3660_OFFSET(chan) + 0x20) #define HI3660_LAG(chan) (HI3660_OFFSET(chan) + 0x28) #define HI3660_INT_EN(chan) (HI3660_OFFSET(chan) + 0x2C) #define HI3660_INT_CLR(chan) (HI3660_OFFSET(chan) + 0x30) #define HI6220_TEMP_BASE (-60000) #define HI6220_TEMP_RESET (100000) #define HI6220_TEMP_STEP (785) #define HI6220_TEMP_LAG (3500) #define HI3660_TEMP_BASE (-63780) #define HI3660_TEMP_STEP (205) #define HI3660_TEMP_LAG (4000) #define HI6220_CLUSTER0_SENSOR 2 #define HI6220_CLUSTER1_SENSOR 1 #define HI3660_LITTLE_SENSOR 0 #define HI3660_BIG_SENSOR 1 #define HI3660_G3D_SENSOR 2 #define HI3660_MODEM_SENSOR 3 struct hisi_thermal_data; struct hisi_thermal_sensor { struct hisi_thermal_data *data; struct thermal_zone_device *tzd; const char *irq_name; uint32_t id; uint32_t thres_temp; }; struct hisi_thermal_ops { int (*get_temp)(struct hisi_thermal_sensor *sensor); int (*enable_sensor)(struct hisi_thermal_sensor *sensor); int (*disable_sensor)(struct hisi_thermal_sensor *sensor); int (*irq_handler)(struct hisi_thermal_sensor *sensor); int (*probe)(struct hisi_thermal_data *data); }; struct hisi_thermal_data { const struct hisi_thermal_ops *ops; struct hisi_thermal_sensor *sensor; struct platform_device *pdev; struct clk *clk; void __iomem *regs; int nr_sensors; }; /* * The temperature computation on the tsensor is as follow: * Unit: millidegree Celsius * Step: 200/255 (0.7843) * Temperature base: -60°C * * The register is programmed in temperature steps, every step is 785 * millidegree and begins at -60 000 m°C * * The temperature from the steps: * * Temp = TempBase + (steps x 785) * * and the steps from the temperature: * * steps = (Temp - TempBase) / 785 * */ static inline int hi6220_thermal_step_to_temp(int step) { return HI6220_TEMP_BASE + (step * HI6220_TEMP_STEP); } static inline int hi6220_thermal_temp_to_step(int temp) { return DIV_ROUND_UP(temp - HI6220_TEMP_BASE, HI6220_TEMP_STEP); } /* * for Hi3660, * Step: 189/922 (0.205) * Temperature base: -63.780°C * * The register is programmed in temperature steps, every step is 205 * millidegree and begins at -63 780 m°C */ static inline int hi3660_thermal_step_to_temp(int step) { return HI3660_TEMP_BASE + step * HI3660_TEMP_STEP; } static inline int hi3660_thermal_temp_to_step(int temp) { return DIV_ROUND_UP(temp - HI3660_TEMP_BASE, HI3660_TEMP_STEP); } /* * The lag register contains 5 bits encoding the temperature in steps. * * Each time the temperature crosses the threshold boundary, an * interrupt is raised. It could be when the temperature is going * above the threshold or below. However, if the temperature is * fluctuating around this value due to the load, we can receive * several interrupts which may not desired. * * We can setup a temperature representing the delta between the * threshold and the current temperature when the temperature is * decreasing. * * For instance: the lag register is 5°C, the threshold is 65°C, when * the temperature reaches 65°C an interrupt is raised and when the * temperature decrease to 65°C - 5°C another interrupt is raised. * * A very short lag can lead to an interrupt storm, a long lag * increase the latency to react to the temperature changes. In our * case, that is not really a problem as we are polling the * temperature. * * [0:4] : lag register * * The temperature is coded in steps, cf. HI6220_TEMP_STEP. * * Min : 0x00 : 0.0 °C * Max : 0x1F : 24.3 °C * * The 'value' parameter is in milliCelsius. */ static inline void hi6220_thermal_set_lag(void __iomem *addr, int value) { writel(DIV_ROUND_UP(value, HI6220_TEMP_STEP) & 0x1F, addr + HI6220_TEMP0_LAG); } static inline void hi6220_thermal_alarm_clear(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_INT_CLR); } static inline void hi6220_thermal_alarm_enable(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_INT_EN); } static inline void hi6220_thermal_alarm_set(void __iomem *addr, int temp) { writel(hi6220_thermal_temp_to_step(temp) | 0x0FFFFFF00, addr + HI6220_TEMP0_TH); } static inline void hi6220_thermal_reset_set(void __iomem *addr, int temp) { writel(hi6220_thermal_temp_to_step(temp), addr + HI6220_TEMP0_RST_TH); } static inline void hi6220_thermal_reset_enable(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_RST_MSK); } static inline void hi6220_thermal_enable(void __iomem *addr, int value) { writel(value, addr + HI6220_TEMP0_EN); } static inline int hi6220_thermal_get_temperature(void __iomem *addr) { return hi6220_thermal_step_to_temp(readl(addr + HI6220_TEMP0_VALUE)); } /* * [0:6] lag register * * The temperature is coded in steps, cf. HI3660_TEMP_STEP. * * Min : 0x00 : 0.0 °C * Max : 0x7F : 26.0 °C * */ static inline void hi3660_thermal_set_lag(void __iomem *addr, int id, int value) { writel(DIV_ROUND_UP(value, HI3660_TEMP_STEP) & 0x7F, addr + HI3660_LAG(id)); } static inline void hi3660_thermal_alarm_clear(void __iomem *addr, int id, int value) { writel(value, addr + HI3660_INT_CLR(id)); } static inline void hi3660_thermal_alarm_enable(void __iomem *addr, int id, int value) { writel(value, addr + HI3660_INT_EN(id)); } static inline void hi3660_thermal_alarm_set(void __iomem *addr, int id, int value) { writel(value, addr + HI3660_TH(id)); } static inline int hi3660_thermal_get_temperature(void __iomem *addr, int id) { return hi3660_thermal_step_to_temp(readl(addr + HI3660_TEMP(id))); } /* * Temperature configuration register - Sensor selection * * Bits [19:12] * * 0x0: local sensor (default) * 0x1: remote sensor 1 (ACPU cluster 1) * 0x2: remote sensor 2 (ACPU cluster 0) * 0x3: remote sensor 3 (G3D) */ static inline void hi6220_thermal_sensor_select(void __iomem *addr, int sensor) { writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_SS_MSK) | (sensor << 12), addr + HI6220_TEMP0_CFG); } /* * Temperature configuration register - Hdak conversion polling interval * * Bits [5:4] * * 0x0 : 0.768 ms * 0x1 : 6.144 ms * 0x2 : 49.152 ms * 0x3 : 393.216 ms */ static inline void hi6220_thermal_hdak_set(void __iomem *addr, int value) { writel((readl(addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_HDAK_MSK) | (value << 4), addr + HI6220_TEMP0_CFG); } static int hi6220_thermal_irq_handler(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; hi6220_thermal_alarm_clear(data->regs, 1); return 0; } static int hi3660_thermal_irq_handler(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; hi3660_thermal_alarm_clear(data->regs, sensor->id, 1); return 0; } static int hi6220_thermal_get_temp(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; return hi6220_thermal_get_temperature(data->regs); } static int hi3660_thermal_get_temp(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; return hi3660_thermal_get_temperature(data->regs, sensor->id); } static int hi6220_thermal_disable_sensor(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; /* disable sensor module */ hi6220_thermal_enable(data->regs, 0); hi6220_thermal_alarm_enable(data->regs, 0); hi6220_thermal_reset_enable(data->regs, 0); clk_disable_unprepare(data->clk); return 0; } static int hi3660_thermal_disable_sensor(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; /* disable sensor module */ hi3660_thermal_alarm_enable(data->regs, sensor->id, 0); return 0; } static int hi6220_thermal_enable_sensor(struct hisi_thermal_sensor *sensor) { struct hisi_thermal_data *data = sensor->data; int ret; /* enable clock for tsensor */ ret = clk_prepare_enable(data->clk); if (ret) return ret; /* disable module firstly */ hi6220_thermal_reset_enable(data->regs, 0); hi6220_thermal_enable(data->regs, 0); /* select sensor id */ hi6220_thermal_sensor_select(data->regs, sensor->id); /* setting the hdak time */ hi6220_thermal_hdak_set(data->regs, 0); /* setting lag value between current temp and the threshold */ hi6220_thermal_set_lag(data->regs, HI6220_TEMP_LAG); /* enable for interrupt */ hi6220_thermal_alarm_set(data->regs, sensor->thres_temp); hi6220_thermal_reset_set(data->regs, HI6220_TEMP_RESET); /* enable module */ hi6220_thermal_reset_enable(data->regs, 1); hi6220_thermal_enable(data->regs, 1); hi6220_thermal_alarm_clear(data->regs, 0); hi6220_thermal_alarm_enable(data->regs, 1); return 0; } static int hi3660_thermal_enable_sensor(struct hisi_thermal_sensor *sensor) { unsigned int value; struct hisi_thermal_data *data = sensor->data; /* disable interrupt */ hi3660_thermal_alarm_enable(data->regs, sensor->id, 0); /* setting lag value between current temp and the threshold */ hi3660_thermal_set_lag(data->regs, sensor->id, HI3660_TEMP_LAG); /* set interrupt threshold */ value = hi3660_thermal_temp_to_step(sensor->thres_temp); hi3660_thermal_alarm_set(data->regs, sensor->id, value); /* enable interrupt */ hi3660_thermal_alarm_clear(data->regs, sensor->id, 1); hi3660_thermal_alarm_enable(data->regs, sensor->id, 1); return 0; } static int hi6220_thermal_probe(struct hisi_thermal_data *data) { struct platform_device *pdev = data->pdev; struct device *dev = &pdev->dev; int ret; data->clk = devm_clk_get(dev, "thermal_clk"); if (IS_ERR(data->clk)) { ret = PTR_ERR(data->clk); if (ret != -EPROBE_DEFER) dev_err(dev, "failed to get thermal clk: %d\n", ret); return ret; } data->sensor = devm_kzalloc(dev, sizeof(*data->sensor), GFP_KERNEL); if (!data->sensor) return -ENOMEM; data->sensor[0].id = HI6220_CLUSTER0_SENSOR; data->sensor[0].irq_name = "tsensor_intr"; data->sensor[0].data = data; data->nr_sensors = 1; return 0; } static int hi3660_thermal_probe(struct hisi_thermal_data *data) { struct platform_device *pdev = data->pdev; struct device *dev = &pdev->dev; data->nr_sensors = 1; data->sensor = devm_kzalloc(dev, sizeof(*data->sensor) * data->nr_sensors, GFP_KERNEL); if (!data->sensor) return -ENOMEM; data->sensor[0].id = HI3660_BIG_SENSOR; data->sensor[0].irq_name = "tsensor_a73"; data->sensor[0].data = data; data->sensor[1].id = HI3660_LITTLE_SENSOR; data->sensor[1].irq_name = "tsensor_a53"; data->sensor[1].data = data; return 0; } static int hisi_thermal_get_temp(struct thermal_zone_device *tz, int *temp) { struct hisi_thermal_sensor *sensor = tz->devdata; struct hisi_thermal_data *data = sensor->data; *temp = data->ops->get_temp(sensor); dev_dbg(&data->pdev->dev, "tzd=%p, id=%d, temp=%d, thres=%d\n", sensor->tzd, sensor->id, *temp, sensor->thres_temp); return 0; } static const struct thermal_zone_device_ops hisi_of_thermal_ops = { .get_temp = hisi_thermal_get_temp, }; static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev) { struct hisi_thermal_sensor *sensor = dev; struct hisi_thermal_data *data = sensor->data; int temp = 0; data->ops->irq_handler(sensor); temp = data->ops->get_temp(sensor); if (temp >= sensor->thres_temp) { dev_crit(&data->pdev->dev, "sensor <%d> THERMAL ALARM: %d > %d\n", sensor->id, temp, sensor->thres_temp); thermal_zone_device_update(sensor->tzd, THERMAL_EVENT_UNSPECIFIED); } else { dev_crit(&data->pdev->dev, "sensor <%d> THERMAL ALARM stopped: %d < %d\n", sensor->id, temp, sensor->thres_temp); } return IRQ_HANDLED; } static int hisi_thermal_register_sensor(struct platform_device *pdev, struct hisi_thermal_sensor *sensor) { int ret, i; const struct thermal_trip *trip; sensor->tzd = devm_thermal_of_zone_register(&pdev->dev, sensor->id, sensor, &hisi_of_thermal_ops); if (IS_ERR(sensor->tzd)) { ret = PTR_ERR(sensor->tzd); sensor->tzd = NULL; dev_err(&pdev->dev, "failed to register sensor id %d: %d\n", sensor->id, ret); return ret; } trip = of_thermal_get_trip_points(sensor->tzd); for (i = 0; i < of_thermal_get_ntrips(sensor->tzd); i++) { if (trip[i].type == THERMAL_TRIP_PASSIVE) { sensor->thres_temp = trip[i].temperature; break; } } return 0; } static const struct hisi_thermal_ops hi6220_ops = { .get_temp = hi6220_thermal_get_temp, .enable_sensor = hi6220_thermal_enable_sensor, .disable_sensor = hi6220_thermal_disable_sensor, .irq_handler = hi6220_thermal_irq_handler, .probe = hi6220_thermal_probe, }; static const struct hisi_thermal_ops hi3660_ops = { .get_temp = hi3660_thermal_get_temp, .enable_sensor = hi3660_thermal_enable_sensor, .disable_sensor = hi3660_thermal_disable_sensor, .irq_handler = hi3660_thermal_irq_handler, .probe = hi3660_thermal_probe, }; static const struct of_device_id of_hisi_thermal_match[] = { { .compatible = "hisilicon,tsensor", .data = &hi6220_ops, }, { .compatible = "hisilicon,hi3660-tsensor", .data = &hi3660_ops, }, { /* end */ } }; MODULE_DEVICE_TABLE(of, of_hisi_thermal_match); static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor, bool on) { struct thermal_zone_device *tzd = sensor->tzd; if (on) thermal_zone_device_enable(tzd); else thermal_zone_device_disable(tzd); } static int hisi_thermal_probe(struct platform_device *pdev) { struct hisi_thermal_data *data; struct device *dev = &pdev->dev; struct resource *res; int i, ret; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; data->pdev = pdev; platform_set_drvdata(pdev, data); data->ops = of_device_get_match_data(dev); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); data->regs = devm_ioremap_resource(dev, res); if (IS_ERR(data->regs)) return PTR_ERR(data->regs); ret = data->ops->probe(data); if (ret) return ret; for (i = 0; i < data->nr_sensors; i++) { struct hisi_thermal_sensor *sensor = &data->sensor[i]; ret = hisi_thermal_register_sensor(pdev, sensor); if (ret) { dev_err(dev, "failed to register thermal sensor: %d\n", ret); return ret; } ret = platform_get_irq(pdev, 0); if (ret < 0) return ret; ret = devm_request_threaded_irq(dev, ret, NULL, hisi_thermal_alarm_irq_thread, IRQF_ONESHOT, sensor->irq_name, sensor); if (ret < 0) { dev_err(dev, "Failed to request alarm irq: %d\n", ret); return ret; } ret = data->ops->enable_sensor(sensor); if (ret) { dev_err(dev, "Failed to setup the sensor: %d\n", ret); return ret; } hisi_thermal_toggle_sensor(sensor, true); } return 0; } static int hisi_thermal_remove(struct platform_device *pdev) { struct hisi_thermal_data *data = platform_get_drvdata(pdev); int i; for (i = 0; i < data->nr_sensors; i++) { struct hisi_thermal_sensor *sensor = &data->sensor[i]; hisi_thermal_toggle_sensor(sensor, false); data->ops->disable_sensor(sensor); } return 0; } static int hisi_thermal_suspend(struct device *dev) { struct hisi_thermal_data *data = dev_get_drvdata(dev); int i; for (i = 0; i < data->nr_sensors; i++) data->ops->disable_sensor(&data->sensor[i]); return 0; } static int hisi_thermal_resume(struct device *dev) { struct hisi_thermal_data *data = dev_get_drvdata(dev); int i, ret = 0; for (i = 0; i < data->nr_sensors; i++) ret |= data->ops->enable_sensor(&data->sensor[i]); return ret; } static DEFINE_SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops, hisi_thermal_suspend, hisi_thermal_resume); static struct platform_driver hisi_thermal_driver = { .driver = { .name = "hisi_thermal", .pm = pm_sleep_ptr(&hisi_thermal_pm_ops), .of_match_table = of_hisi_thermal_match, }, .probe = hisi_thermal_probe, .remove = hisi_thermal_remove, }; module_platform_driver(hisi_thermal_driver); MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>"); MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>"); MODULE_DESCRIPTION("HiSilicon thermal driver"); MODULE_LICENSE("GPL v2"); |