1 /* 2 * Copyright 2010 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24 25 #ifdef CONFIG_ACPI 26 #include <linux/acpi.h> 27 #endif 28 #include <linux/power_supply.h> 29 #include <linux/hwmon.h> 30 #include <linux/hwmon-sysfs.h> 31 32 #include "nouveau_drv.h" 33 #include "nouveau_hwmon.h" 34 35 #include <nvkm/subdev/iccsense.h> 36 #include <nvkm/subdev/volt.h> 37 38 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE)) 39 40 static ssize_t 41 nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d, 42 struct device_attribute *a, char *buf) 43 { 44 return snprintf(buf, PAGE_SIZE, "%d\n", 100); 45 } 46 static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, 0444, 47 nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0); 48 49 static ssize_t 50 nouveau_hwmon_temp1_auto_point1_temp(struct device *d, 51 struct device_attribute *a, char *buf) 52 { 53 struct drm_device *dev = dev_get_drvdata(d); 54 struct nouveau_drm *drm = nouveau_drm(dev); 55 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 56 57 return snprintf(buf, PAGE_SIZE, "%d\n", 58 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000); 59 } 60 static ssize_t 61 nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d, 62 struct device_attribute *a, 63 const char *buf, size_t count) 64 { 65 struct drm_device *dev = dev_get_drvdata(d); 66 struct nouveau_drm *drm = nouveau_drm(dev); 67 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 68 long value; 69 70 if (kstrtol(buf, 10, &value)) 71 return -EINVAL; 72 73 therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST, 74 value / 1000); 75 76 return count; 77 } 78 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, 0644, 79 nouveau_hwmon_temp1_auto_point1_temp, 80 nouveau_hwmon_set_temp1_auto_point1_temp, 0); 81 82 static ssize_t 83 nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device *d, 84 struct device_attribute *a, char *buf) 85 { 86 struct drm_device *dev = dev_get_drvdata(d); 87 struct nouveau_drm *drm = nouveau_drm(dev); 88 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 89 90 return snprintf(buf, PAGE_SIZE, "%d\n", 91 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000); 92 } 93 static ssize_t 94 nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d, 95 struct device_attribute *a, 96 const char *buf, size_t count) 97 { 98 struct drm_device *dev = dev_get_drvdata(d); 99 struct nouveau_drm *drm = nouveau_drm(dev); 100 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 101 long value; 102 103 if (kstrtol(buf, 10, &value)) 104 return -EINVAL; 105 106 therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST, 107 value / 1000); 108 109 return count; 110 } 111 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, 0644, 112 nouveau_hwmon_temp1_auto_point1_temp_hyst, 113 nouveau_hwmon_set_temp1_auto_point1_temp_hyst, 0); 114 115 static ssize_t 116 nouveau_hwmon_get_pwm1_max(struct device *d, 117 struct device_attribute *a, char *buf) 118 { 119 struct drm_device *dev = dev_get_drvdata(d); 120 struct nouveau_drm *drm = nouveau_drm(dev); 121 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 122 int ret; 123 124 ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY); 125 if (ret < 0) 126 return ret; 127 128 return sprintf(buf, "%i\n", ret); 129 } 130 131 static ssize_t 132 nouveau_hwmon_get_pwm1_min(struct device *d, 133 struct device_attribute *a, char *buf) 134 { 135 struct drm_device *dev = dev_get_drvdata(d); 136 struct nouveau_drm *drm = nouveau_drm(dev); 137 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 138 int ret; 139 140 ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY); 141 if (ret < 0) 142 return ret; 143 144 return sprintf(buf, "%i\n", ret); 145 } 146 147 static ssize_t 148 nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a, 149 const char *buf, size_t count) 150 { 151 struct drm_device *dev = dev_get_drvdata(d); 152 struct nouveau_drm *drm = nouveau_drm(dev); 153 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 154 long value; 155 int ret; 156 157 if (kstrtol(buf, 10, &value)) 158 return -EINVAL; 159 160 ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY, value); 161 if (ret < 0) 162 return ret; 163 164 return count; 165 } 166 static SENSOR_DEVICE_ATTR(pwm1_min, 0644, 167 nouveau_hwmon_get_pwm1_min, 168 nouveau_hwmon_set_pwm1_min, 0); 169 170 static ssize_t 171 nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a, 172 const char *buf, size_t count) 173 { 174 struct drm_device *dev = dev_get_drvdata(d); 175 struct nouveau_drm *drm = nouveau_drm(dev); 176 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 177 long value; 178 int ret; 179 180 if (kstrtol(buf, 10, &value)) 181 return -EINVAL; 182 183 ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY, value); 184 if (ret < 0) 185 return ret; 186 187 return count; 188 } 189 static SENSOR_DEVICE_ATTR(pwm1_max, 0644, 190 nouveau_hwmon_get_pwm1_max, 191 nouveau_hwmon_set_pwm1_max, 0); 192 193 static struct attribute *pwm_fan_sensor_attrs[] = { 194 &sensor_dev_attr_pwm1_min.dev_attr.attr, 195 &sensor_dev_attr_pwm1_max.dev_attr.attr, 196 NULL 197 }; 198 static const struct attribute_group pwm_fan_sensor_group = { 199 .attrs = pwm_fan_sensor_attrs, 200 }; 201 202 static struct attribute *temp1_auto_point_sensor_attrs[] = { 203 &sensor_dev_attr_temp1_auto_point1_pwm.dev_attr.attr, 204 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr, 205 &sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr, 206 NULL 207 }; 208 static const struct attribute_group temp1_auto_point_sensor_group = { 209 .attrs = temp1_auto_point_sensor_attrs, 210 }; 211 212 #define N_ATTR_GROUPS 3 213 214 static const struct hwmon_channel_info *nouveau_info[] = { 215 HWMON_CHANNEL_INFO(chip, 216 HWMON_C_UPDATE_INTERVAL), 217 HWMON_CHANNEL_INFO(temp, 218 HWMON_T_INPUT | 219 HWMON_T_MAX | HWMON_T_MAX_HYST | 220 HWMON_T_CRIT | HWMON_T_CRIT_HYST | 221 HWMON_T_EMERGENCY | HWMON_T_EMERGENCY_HYST), 222 HWMON_CHANNEL_INFO(fan, 223 HWMON_F_INPUT), 224 HWMON_CHANNEL_INFO(in, 225 HWMON_I_INPUT | 226 HWMON_I_MIN | HWMON_I_MAX | 227 HWMON_I_LABEL), 228 HWMON_CHANNEL_INFO(pwm, 229 HWMON_PWM_INPUT | HWMON_PWM_ENABLE), 230 HWMON_CHANNEL_INFO(power, 231 HWMON_P_INPUT | HWMON_P_CAP_MAX | HWMON_P_CRIT), 232 NULL 233 }; 234 235 static umode_t 236 nouveau_chip_is_visible(const void *data, u32 attr, int channel) 237 { 238 switch (attr) { 239 case hwmon_chip_update_interval: 240 return 0444; 241 default: 242 return 0; 243 } 244 } 245 246 static umode_t 247 nouveau_power_is_visible(const void *data, u32 attr, int channel) 248 { 249 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 250 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device); 251 252 if (!iccsense || !iccsense->data_valid || list_empty(&iccsense->rails)) 253 return 0; 254 255 switch (attr) { 256 case hwmon_power_input: 257 return 0444; 258 case hwmon_power_max: 259 if (iccsense->power_w_max) 260 return 0444; 261 return 0; 262 case hwmon_power_crit: 263 if (iccsense->power_w_crit) 264 return 0444; 265 return 0; 266 default: 267 return 0; 268 } 269 } 270 271 static umode_t 272 nouveau_temp_is_visible(const void *data, u32 attr, int channel) 273 { 274 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 275 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 276 277 if (!therm || !therm->attr_get || nvkm_therm_temp_get(therm) < 0) 278 return 0; 279 280 switch (attr) { 281 case hwmon_temp_input: 282 return 0444; 283 case hwmon_temp_max: 284 case hwmon_temp_max_hyst: 285 case hwmon_temp_crit: 286 case hwmon_temp_crit_hyst: 287 case hwmon_temp_emergency: 288 case hwmon_temp_emergency_hyst: 289 return 0644; 290 default: 291 return 0; 292 } 293 } 294 295 static umode_t 296 nouveau_pwm_is_visible(const void *data, u32 attr, int channel) 297 { 298 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 299 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 300 301 if (!therm || !therm->attr_get || !therm->fan_get || 302 therm->fan_get(therm) < 0) 303 return 0; 304 305 switch (attr) { 306 case hwmon_pwm_enable: 307 case hwmon_pwm_input: 308 return 0644; 309 default: 310 return 0; 311 } 312 } 313 314 static umode_t 315 nouveau_input_is_visible(const void *data, u32 attr, int channel) 316 { 317 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 318 struct nvkm_volt *volt = nvxx_volt(&drm->client.device); 319 320 if (!volt || nvkm_volt_get(volt) < 0) 321 return 0; 322 323 switch (attr) { 324 case hwmon_in_input: 325 case hwmon_in_label: 326 case hwmon_in_min: 327 case hwmon_in_max: 328 return 0444; 329 default: 330 return 0; 331 } 332 } 333 334 static umode_t 335 nouveau_fan_is_visible(const void *data, u32 attr, int channel) 336 { 337 struct nouveau_drm *drm = nouveau_drm((struct drm_device *)data); 338 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 339 340 if (!therm || !therm->attr_get || nvkm_therm_fan_sense(therm) < 0) 341 return 0; 342 343 switch (attr) { 344 case hwmon_fan_input: 345 return 0444; 346 default: 347 return 0; 348 } 349 } 350 351 static int 352 nouveau_chip_read(struct device *dev, u32 attr, int channel, long *val) 353 { 354 switch (attr) { 355 case hwmon_chip_update_interval: 356 *val = 1000; 357 break; 358 default: 359 return -EOPNOTSUPP; 360 } 361 362 return 0; 363 } 364 365 static int 366 nouveau_temp_read(struct device *dev, u32 attr, int channel, long *val) 367 { 368 struct drm_device *drm_dev = dev_get_drvdata(dev); 369 struct nouveau_drm *drm = nouveau_drm(drm_dev); 370 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 371 int ret; 372 373 if (!therm || !therm->attr_get) 374 return -EOPNOTSUPP; 375 376 switch (attr) { 377 case hwmon_temp_input: 378 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 379 return -EINVAL; 380 ret = nvkm_therm_temp_get(therm); 381 *val = ret < 0 ? ret : (ret * 1000); 382 break; 383 case hwmon_temp_max: 384 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK) 385 * 1000; 386 break; 387 case hwmon_temp_max_hyst: 388 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST) 389 * 1000; 390 break; 391 case hwmon_temp_crit: 392 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL) 393 * 1000; 394 break; 395 case hwmon_temp_crit_hyst: 396 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST) 397 * 1000; 398 break; 399 case hwmon_temp_emergency: 400 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN) 401 * 1000; 402 break; 403 case hwmon_temp_emergency_hyst: 404 *val = therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST) 405 * 1000; 406 break; 407 default: 408 return -EOPNOTSUPP; 409 } 410 411 return 0; 412 } 413 414 static int 415 nouveau_fan_read(struct device *dev, u32 attr, int channel, long *val) 416 { 417 struct drm_device *drm_dev = dev_get_drvdata(dev); 418 struct nouveau_drm *drm = nouveau_drm(drm_dev); 419 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 420 421 if (!therm) 422 return -EOPNOTSUPP; 423 424 switch (attr) { 425 case hwmon_fan_input: 426 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 427 return -EINVAL; 428 *val = nvkm_therm_fan_sense(therm); 429 break; 430 default: 431 return -EOPNOTSUPP; 432 } 433 434 return 0; 435 } 436 437 static int 438 nouveau_in_read(struct device *dev, u32 attr, int channel, long *val) 439 { 440 struct drm_device *drm_dev = dev_get_drvdata(dev); 441 struct nouveau_drm *drm = nouveau_drm(drm_dev); 442 struct nvkm_volt *volt = nvxx_volt(&drm->client.device); 443 int ret; 444 445 if (!volt) 446 return -EOPNOTSUPP; 447 448 switch (attr) { 449 case hwmon_in_input: 450 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 451 return -EINVAL; 452 ret = nvkm_volt_get(volt); 453 *val = ret < 0 ? ret : (ret / 1000); 454 break; 455 case hwmon_in_min: 456 *val = volt->min_uv > 0 ? (volt->min_uv / 1000) : -ENODEV; 457 break; 458 case hwmon_in_max: 459 *val = volt->max_uv > 0 ? (volt->max_uv / 1000) : -ENODEV; 460 break; 461 default: 462 return -EOPNOTSUPP; 463 } 464 465 return 0; 466 } 467 468 static int 469 nouveau_pwm_read(struct device *dev, u32 attr, int channel, long *val) 470 { 471 struct drm_device *drm_dev = dev_get_drvdata(dev); 472 struct nouveau_drm *drm = nouveau_drm(drm_dev); 473 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 474 475 if (!therm || !therm->attr_get || !therm->fan_get) 476 return -EOPNOTSUPP; 477 478 switch (attr) { 479 case hwmon_pwm_enable: 480 *val = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MODE); 481 break; 482 case hwmon_pwm_input: 483 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 484 return -EINVAL; 485 *val = therm->fan_get(therm); 486 break; 487 default: 488 return -EOPNOTSUPP; 489 } 490 491 return 0; 492 } 493 494 static int 495 nouveau_power_read(struct device *dev, u32 attr, int channel, long *val) 496 { 497 struct drm_device *drm_dev = dev_get_drvdata(dev); 498 struct nouveau_drm *drm = nouveau_drm(drm_dev); 499 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device); 500 501 if (!iccsense) 502 return -EOPNOTSUPP; 503 504 switch (attr) { 505 case hwmon_power_input: 506 if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) 507 return -EINVAL; 508 *val = nvkm_iccsense_read_all(iccsense); 509 break; 510 case hwmon_power_max: 511 *val = iccsense->power_w_max; 512 break; 513 case hwmon_power_crit: 514 *val = iccsense->power_w_crit; 515 break; 516 default: 517 return -EOPNOTSUPP; 518 } 519 520 return 0; 521 } 522 523 static int 524 nouveau_temp_write(struct device *dev, u32 attr, int channel, long val) 525 { 526 struct drm_device *drm_dev = dev_get_drvdata(dev); 527 struct nouveau_drm *drm = nouveau_drm(drm_dev); 528 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 529 530 if (!therm || !therm->attr_set) 531 return -EOPNOTSUPP; 532 533 switch (attr) { 534 case hwmon_temp_max: 535 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK, 536 val / 1000); 537 case hwmon_temp_max_hyst: 538 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST, 539 val / 1000); 540 case hwmon_temp_crit: 541 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL, 542 val / 1000); 543 case hwmon_temp_crit_hyst: 544 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST, 545 val / 1000); 546 case hwmon_temp_emergency: 547 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN, 548 val / 1000); 549 case hwmon_temp_emergency_hyst: 550 return therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST, 551 val / 1000); 552 default: 553 return -EOPNOTSUPP; 554 } 555 } 556 557 static int 558 nouveau_pwm_write(struct device *dev, u32 attr, int channel, long val) 559 { 560 struct drm_device *drm_dev = dev_get_drvdata(dev); 561 struct nouveau_drm *drm = nouveau_drm(drm_dev); 562 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 563 564 if (!therm || !therm->attr_set) 565 return -EOPNOTSUPP; 566 567 switch (attr) { 568 case hwmon_pwm_input: 569 return therm->fan_set(therm, val); 570 case hwmon_pwm_enable: 571 return therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MODE, val); 572 default: 573 return -EOPNOTSUPP; 574 } 575 } 576 577 static umode_t 578 nouveau_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, 579 int channel) 580 { 581 switch (type) { 582 case hwmon_chip: 583 return nouveau_chip_is_visible(data, attr, channel); 584 case hwmon_temp: 585 return nouveau_temp_is_visible(data, attr, channel); 586 case hwmon_fan: 587 return nouveau_fan_is_visible(data, attr, channel); 588 case hwmon_in: 589 return nouveau_input_is_visible(data, attr, channel); 590 case hwmon_pwm: 591 return nouveau_pwm_is_visible(data, attr, channel); 592 case hwmon_power: 593 return nouveau_power_is_visible(data, attr, channel); 594 default: 595 return 0; 596 } 597 } 598 599 static const char input_label[] = "GPU core"; 600 601 static int 602 nouveau_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, 603 int channel, const char **buf) 604 { 605 if (type == hwmon_in && attr == hwmon_in_label) { 606 *buf = input_label; 607 return 0; 608 } 609 610 return -EOPNOTSUPP; 611 } 612 613 static int 614 nouveau_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, 615 int channel, long *val) 616 { 617 switch (type) { 618 case hwmon_chip: 619 return nouveau_chip_read(dev, attr, channel, val); 620 case hwmon_temp: 621 return nouveau_temp_read(dev, attr, channel, val); 622 case hwmon_fan: 623 return nouveau_fan_read(dev, attr, channel, val); 624 case hwmon_in: 625 return nouveau_in_read(dev, attr, channel, val); 626 case hwmon_pwm: 627 return nouveau_pwm_read(dev, attr, channel, val); 628 case hwmon_power: 629 return nouveau_power_read(dev, attr, channel, val); 630 default: 631 return -EOPNOTSUPP; 632 } 633 } 634 635 static int 636 nouveau_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, 637 int channel, long val) 638 { 639 switch (type) { 640 case hwmon_temp: 641 return nouveau_temp_write(dev, attr, channel, val); 642 case hwmon_pwm: 643 return nouveau_pwm_write(dev, attr, channel, val); 644 default: 645 return -EOPNOTSUPP; 646 } 647 } 648 649 static const struct hwmon_ops nouveau_hwmon_ops = { 650 .is_visible = nouveau_is_visible, 651 .read = nouveau_read, 652 .read_string = nouveau_read_string, 653 .write = nouveau_write, 654 }; 655 656 static const struct hwmon_chip_info nouveau_chip_info = { 657 .ops = &nouveau_hwmon_ops, 658 .info = nouveau_info, 659 }; 660 #endif 661 662 int 663 nouveau_hwmon_init(struct drm_device *dev) 664 { 665 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE)) 666 struct nouveau_drm *drm = nouveau_drm(dev); 667 struct nvkm_iccsense *iccsense = nvxx_iccsense(&drm->client.device); 668 struct nvkm_therm *therm = nvxx_therm(&drm->client.device); 669 struct nvkm_volt *volt = nvxx_volt(&drm->client.device); 670 const struct attribute_group *special_groups[N_ATTR_GROUPS]; 671 struct nouveau_hwmon *hwmon; 672 struct device *hwmon_dev; 673 int ret = 0; 674 int i = 0; 675 676 if (!iccsense && !therm && !volt) { 677 NV_DEBUG(drm, "Skipping hwmon registration\n"); 678 return 0; 679 } 680 681 hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL); 682 if (!hwmon) 683 return -ENOMEM; 684 hwmon->dev = dev; 685 686 if (therm && therm->attr_get && therm->attr_set) { 687 if (nvkm_therm_temp_get(therm) >= 0) 688 special_groups[i++] = &temp1_auto_point_sensor_group; 689 if (therm->fan_get && therm->fan_get(therm) >= 0) 690 special_groups[i++] = &pwm_fan_sensor_group; 691 } 692 693 special_groups[i] = NULL; 694 hwmon_dev = hwmon_device_register_with_info(dev->dev, "nouveau", dev, 695 &nouveau_chip_info, 696 special_groups); 697 if (IS_ERR(hwmon_dev)) { 698 ret = PTR_ERR(hwmon_dev); 699 NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret); 700 return ret; 701 } 702 703 hwmon->hwmon = hwmon_dev; 704 return 0; 705 #else 706 return 0; 707 #endif 708 } 709 710 void 711 nouveau_hwmon_fini(struct drm_device *dev) 712 { 713 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE)) 714 struct nouveau_hwmon *hwmon = nouveau_hwmon(dev); 715 716 if (!hwmon) 717 return; 718 719 if (hwmon->hwmon) 720 hwmon_device_unregister(hwmon->hwmon); 721 722 nouveau_drm(dev)->hwmon = NULL; 723 kfree(hwmon); 724 #endif 725 } 726