kernel/drivers/gpu/drm/nouveau/nouveau_hwmon.c

   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 <drm/drmP.h>
  33
  34 #include "nouveau_drm.h"
  35 #include "nouveau_hwmon.h"
  36
  37 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
  38 static ssize_t
  39 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
  40 {
  41         struct drm_device *dev = dev_get_drvdata(d);
  42         struct nouveau_drm *drm = nouveau_drm(dev);
  43         struct nvkm_therm *therm = nvxx_therm(&drm->device);
  44         int temp = therm->temp_get(therm);
  45
  46         if (temp < 0)
  47                 return temp;
  48
  49         return snprintf(buf, PAGE_SIZE, "%d\n", temp * 1000);
  50 }
  51 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
  52                                                   NULL, 0);
  53
  54 static ssize_t
  55 nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
  56                                          struct device_attribute *a, char *buf)
  57 {
  58         return snprintf(buf, PAGE_SIZE, "%d\n", 100);
  59 }
  60 static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, S_IRUGO,
  61                           nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0);
  62
  63 static ssize_t
  64 nouveau_hwmon_temp1_auto_point1_temp(struct device *d,
  65                                      struct device_attribute *a, char *buf)
  66 {
  67         struct drm_device *dev = dev_get_drvdata(d);
  68         struct nouveau_drm *drm = nouveau_drm(dev);
  69         struct nvkm_therm *therm = nvxx_therm(&drm->device);
  70
  71         return snprintf(buf, PAGE_SIZE, "%d\n",
  72               therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000);
  73 }
  74 static ssize_t
  75 nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
  76                                          struct device_attribute *a,
  77                                          const char *buf, size_t count)
  78 {
  79         struct drm_device *dev = dev_get_drvdata(d);
  80         struct nouveau_drm *drm = nouveau_drm(dev);
  81         struct nvkm_therm *therm = nvxx_therm(&drm->device);
  82         long value;
  83
  84         if (kstrtol(buf, 10, &value) == -EINVAL)
  85                 return count;
  86
  87         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST,
  88                         value / 1000);
  89
  90         return count;
  91 }
  92 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
  93                           nouveau_hwmon_temp1_auto_point1_temp,
  94                           nouveau_hwmon_set_temp1_auto_point1_temp, 0);
  95
  96 static ssize_t
  97 nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device *d,
  98                                           struct device_attribute *a, char *buf)
  99 {
 100         struct drm_device *dev = dev_get_drvdata(d);
 101         struct nouveau_drm *drm = nouveau_drm(dev);
 102         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 103
 104         return snprintf(buf, PAGE_SIZE, "%d\n",
 105          therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000);
 106 }
 107 static ssize_t
 108 nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
 109                                               struct device_attribute *a,
 110                                               const char *buf, size_t count)
 111 {
 112         struct drm_device *dev = dev_get_drvdata(d);
 113         struct nouveau_drm *drm = nouveau_drm(dev);
 114         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 115         long value;
 116
 117         if (kstrtol(buf, 10, &value) == -EINVAL)
 118                 return count;
 119
 120         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST,
 121                         value / 1000);
 122
 123         return count;
 124 }
 125 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
 126                           nouveau_hwmon_temp1_auto_point1_temp_hyst,
 127                           nouveau_hwmon_set_temp1_auto_point1_temp_hyst, 0);
 128
 129 static ssize_t
 130 nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
 131 {
 132         struct drm_device *dev = dev_get_drvdata(d);
 133         struct nouveau_drm *drm = nouveau_drm(dev);
 134         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 135
 136         return snprintf(buf, PAGE_SIZE, "%d\n",
 137                therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK) * 1000);
 138 }
 139 static ssize_t
 140 nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
 141                                                 const char *buf, size_t count)
 142 {
 143         struct drm_device *dev = dev_get_drvdata(d);
 144         struct nouveau_drm *drm = nouveau_drm(dev);
 145         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 146         long value;
 147
 148         if (kstrtol(buf, 10, &value) == -EINVAL)
 149                 return count;
 150
 151         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK, value / 1000);
 152
 153         return count;
 154 }
 155 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
 156                                                   nouveau_hwmon_set_max_temp,
 157                                                   0);
 158
 159 static ssize_t
 160 nouveau_hwmon_max_temp_hyst(struct device *d, struct device_attribute *a,
 161                             char *buf)
 162 {
 163         struct drm_device *dev = dev_get_drvdata(d);
 164         struct nouveau_drm *drm = nouveau_drm(dev);
 165         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 166
 167         return snprintf(buf, PAGE_SIZE, "%d\n",
 168           therm->attr_get(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST) * 1000);
 169 }
 170 static ssize_t
 171 nouveau_hwmon_set_max_temp_hyst(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->device);
 177         long value;
 178
 179         if (kstrtol(buf, 10, &value) == -EINVAL)
 180                 return count;
 181
 182         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_DOWN_CLK_HYST,
 183                         value / 1000);
 184
 185         return count;
 186 }
 187 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 188                           nouveau_hwmon_max_temp_hyst,
 189                           nouveau_hwmon_set_max_temp_hyst, 0);
 190
 191 static ssize_t
 192 nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
 193                                                         char *buf)
 194 {
 195         struct drm_device *dev = dev_get_drvdata(d);
 196         struct nouveau_drm *drm = nouveau_drm(dev);
 197         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 198
 199         return snprintf(buf, PAGE_SIZE, "%d\n",
 200                therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL) * 1000);
 201 }
 202 static ssize_t
 203 nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
 204                                                             const char *buf,
 205                                                                 size_t count)
 206 {
 207         struct drm_device *dev = dev_get_drvdata(d);
 208         struct nouveau_drm *drm = nouveau_drm(dev);
 209         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 210         long value;
 211
 212         if (kstrtol(buf, 10, &value) == -EINVAL)
 213                 return count;
 214
 215         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL, value / 1000);
 216
 217         return count;
 218 }
 219 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
 220                                                 nouveau_hwmon_critical_temp,
 221                                                 nouveau_hwmon_set_critical_temp,
 222                                                 0);
 223
 224 static ssize_t
 225 nouveau_hwmon_critical_temp_hyst(struct device *d, struct device_attribute *a,
 226                                                         char *buf)
 227 {
 228         struct drm_device *dev = dev_get_drvdata(d);
 229         struct nouveau_drm *drm = nouveau_drm(dev);
 230         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 231
 232         return snprintf(buf, PAGE_SIZE, "%d\n",
 233           therm->attr_get(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST) * 1000);
 234 }
 235 static ssize_t
 236 nouveau_hwmon_set_critical_temp_hyst(struct device *d,
 237                                      struct device_attribute *a,
 238                                      const char *buf,
 239                                      size_t count)
 240 {
 241         struct drm_device *dev = dev_get_drvdata(d);
 242         struct nouveau_drm *drm = nouveau_drm(dev);
 243         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 244         long value;
 245
 246         if (kstrtol(buf, 10, &value) == -EINVAL)
 247                 return count;
 248
 249         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_CRITICAL_HYST,
 250                         value / 1000);
 251
 252         return count;
 253 }
 254 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO | S_IWUSR,
 255                           nouveau_hwmon_critical_temp_hyst,
 256                           nouveau_hwmon_set_critical_temp_hyst, 0);
 257 static ssize_t
 258 nouveau_hwmon_emergency_temp(struct device *d, struct device_attribute *a,
 259                                                         char *buf)
 260 {
 261         struct drm_device *dev = dev_get_drvdata(d);
 262         struct nouveau_drm *drm = nouveau_drm(dev);
 263         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 264
 265         return snprintf(buf, PAGE_SIZE, "%d\n",
 266                therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN) * 1000);
 267 }
 268 static ssize_t
 269 nouveau_hwmon_set_emergency_temp(struct device *d, struct device_attribute *a,
 270                                                             const char *buf,
 271                                                                 size_t count)
 272 {
 273         struct drm_device *dev = dev_get_drvdata(d);
 274         struct nouveau_drm *drm = nouveau_drm(dev);
 275         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 276         long value;
 277
 278         if (kstrtol(buf, 10, &value) == -EINVAL)
 279                 return count;
 280
 281         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN, value / 1000);
 282
 283         return count;
 284 }
 285 static SENSOR_DEVICE_ATTR(temp1_emergency, S_IRUGO | S_IWUSR,
 286                                         nouveau_hwmon_emergency_temp,
 287                                         nouveau_hwmon_set_emergency_temp,
 288                                         0);
 289
 290 static ssize_t
 291 nouveau_hwmon_emergency_temp_hyst(struct device *d, struct device_attribute *a,
 292                                                         char *buf)
 293 {
 294         struct drm_device *dev = dev_get_drvdata(d);
 295         struct nouveau_drm *drm = nouveau_drm(dev);
 296         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 297
 298         return snprintf(buf, PAGE_SIZE, "%d\n",
 299           therm->attr_get(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST) * 1000);
 300 }
 301 static ssize_t
 302 nouveau_hwmon_set_emergency_temp_hyst(struct device *d,
 303                                       struct device_attribute *a,
 304                                       const char *buf,
 305                                       size_t count)
 306 {
 307         struct drm_device *dev = dev_get_drvdata(d);
 308         struct nouveau_drm *drm = nouveau_drm(dev);
 309         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 310         long value;
 311
 312         if (kstrtol(buf, 10, &value) == -EINVAL)
 313                 return count;
 314
 315         therm->attr_set(therm, NVKM_THERM_ATTR_THRS_SHUTDOWN_HYST,
 316                         value / 1000);
 317
 318         return count;
 319 }
 320 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO | S_IWUSR,
 321                                         nouveau_hwmon_emergency_temp_hyst,
 322                                         nouveau_hwmon_set_emergency_temp_hyst,
 323                                         0);
 324
 325 static ssize_t nouveau_hwmon_show_name(struct device *dev,
 326                                       struct device_attribute *attr,
 327                                       char *buf)
 328 {
 329         return sprintf(buf, "nouveau\n");
 330 }
 331 static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
 332
 333 static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
 334                                       struct device_attribute *attr,
 335                                       char *buf)
 336 {
 337         return sprintf(buf, "1000\n");
 338 }
 339 static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
 340                                                 nouveau_hwmon_show_update_rate,
 341                                                 NULL, 0);
 342
 343 static ssize_t
 344 nouveau_hwmon_show_fan1_input(struct device *d, struct device_attribute *attr,
 345                               char *buf)
 346 {
 347         struct drm_device *dev = dev_get_drvdata(d);
 348         struct nouveau_drm *drm = nouveau_drm(dev);
 349         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 350
 351         return snprintf(buf, PAGE_SIZE, "%d\n", therm->fan_sense(therm));
 352 }
 353 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, nouveau_hwmon_show_fan1_input,
 354                           NULL, 0);
 355
 356  static ssize_t
 357 nouveau_hwmon_get_pwm1_enable(struct device *d,
 358                            struct device_attribute *a, char *buf)
 359 {
 360         struct drm_device *dev = dev_get_drvdata(d);
 361         struct nouveau_drm *drm = nouveau_drm(dev);
 362         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 363         int ret;
 364
 365         ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MODE);
 366         if (ret < 0)
 367                 return ret;
 368
 369         return sprintf(buf, "%i\n", ret);
 370 }
 371
 372 static ssize_t
 373 nouveau_hwmon_set_pwm1_enable(struct device *d, struct device_attribute *a,
 374                            const char *buf, size_t count)
 375 {
 376         struct drm_device *dev = dev_get_drvdata(d);
 377         struct nouveau_drm *drm = nouveau_drm(dev);
 378         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 379         long value;
 380         int ret;
 381
 382         ret = kstrtol(buf, 10, &value);
 383         if (ret)
 384                 return ret;
 385
 386         ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MODE, value);
 387         if (ret)
 388                 return ret;
 389         else
 390                 return count;
 391 }
 392 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 393                           nouveau_hwmon_get_pwm1_enable,
 394                           nouveau_hwmon_set_pwm1_enable, 0);
 395
 396 static ssize_t
 397 nouveau_hwmon_get_pwm1(struct device *d, struct device_attribute *a, char *buf)
 398 {
 399         struct drm_device *dev = dev_get_drvdata(d);
 400         struct nouveau_drm *drm = nouveau_drm(dev);
 401         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 402         int ret;
 403
 404         ret = therm->fan_get(therm);
 405         if (ret < 0)
 406                 return ret;
 407
 408         return sprintf(buf, "%i\n", ret);
 409 }
 410
 411 static ssize_t
 412 nouveau_hwmon_set_pwm1(struct device *d, struct device_attribute *a,
 413                        const char *buf, size_t count)
 414 {
 415         struct drm_device *dev = dev_get_drvdata(d);
 416         struct nouveau_drm *drm = nouveau_drm(dev);
 417         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 418         int ret = -ENODEV;
 419         long value;
 420
 421         if (kstrtol(buf, 10, &value) == -EINVAL)
 422                 return -EINVAL;
 423
 424         ret = therm->fan_set(therm, value);
 425         if (ret)
 426                 return ret;
 427
 428         return count;
 429 }
 430
 431 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR,
 432                           nouveau_hwmon_get_pwm1,
 433                           nouveau_hwmon_set_pwm1, 0);
 434
 435 static ssize_t
 436 nouveau_hwmon_get_pwm1_min(struct device *d,
 437                            struct device_attribute *a, char *buf)
 438 {
 439         struct drm_device *dev = dev_get_drvdata(d);
 440         struct nouveau_drm *drm = nouveau_drm(dev);
 441         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 442         int ret;
 443
 444         ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY);
 445         if (ret < 0)
 446                 return ret;
 447
 448         return sprintf(buf, "%i\n", ret);
 449 }
 450
 451 static ssize_t
 452 nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
 453                            const char *buf, size_t count)
 454 {
 455         struct drm_device *dev = dev_get_drvdata(d);
 456         struct nouveau_drm *drm = nouveau_drm(dev);
 457         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 458         long value;
 459         int ret;
 460
 461         if (kstrtol(buf, 10, &value) == -EINVAL)
 462                 return -EINVAL;
 463
 464         ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MIN_DUTY, value);
 465         if (ret < 0)
 466                 return ret;
 467
 468         return count;
 469 }
 470
 471 static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO | S_IWUSR,
 472                           nouveau_hwmon_get_pwm1_min,
 473                           nouveau_hwmon_set_pwm1_min, 0);
 474
 475 static ssize_t
 476 nouveau_hwmon_get_pwm1_max(struct device *d,
 477                            struct device_attribute *a, char *buf)
 478 {
 479         struct drm_device *dev = dev_get_drvdata(d);
 480         struct nouveau_drm *drm = nouveau_drm(dev);
 481         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 482         int ret;
 483
 484         ret = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY);
 485         if (ret < 0)
 486                 return ret;
 487
 488         return sprintf(buf, "%i\n", ret);
 489 }
 490
 491 static ssize_t
 492 nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
 493                            const char *buf, size_t count)
 494 {
 495         struct drm_device *dev = dev_get_drvdata(d);
 496         struct nouveau_drm *drm = nouveau_drm(dev);
 497         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 498         long value;
 499         int ret;
 500
 501         if (kstrtol(buf, 10, &value) == -EINVAL)
 502                 return -EINVAL;
 503
 504         ret = therm->attr_set(therm, NVKM_THERM_ATTR_FAN_MAX_DUTY, value);
 505         if (ret < 0)
 506                 return ret;
 507
 508         return count;
 509 }
 510
 511 static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO | S_IWUSR,
 512                           nouveau_hwmon_get_pwm1_max,
 513                           nouveau_hwmon_set_pwm1_max, 0);
 514
 515 static struct attribute *hwmon_default_attributes[] = {
 516         &sensor_dev_attr_name.dev_attr.attr,
 517         &sensor_dev_attr_update_rate.dev_attr.attr,
 518         NULL
 519 };
 520 static struct attribute *hwmon_temp_attributes[] = {
 521         &sensor_dev_attr_temp1_input.dev_attr.attr,
 522         &sensor_dev_attr_temp1_auto_point1_pwm.dev_attr.attr,
 523         &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
 524         &sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr,
 525         &sensor_dev_attr_temp1_max.dev_attr.attr,
 526         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 527         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 528         &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
 529         &sensor_dev_attr_temp1_emergency.dev_attr.attr,
 530         &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
 531         NULL
 532 };
 533 static struct attribute *hwmon_fan_rpm_attributes[] = {
 534         &sensor_dev_attr_fan1_input.dev_attr.attr,
 535         NULL
 536 };
 537 static struct attribute *hwmon_pwm_fan_attributes[] = {
 538         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 539         &sensor_dev_attr_pwm1.dev_attr.attr,
 540         &sensor_dev_attr_pwm1_min.dev_attr.attr,
 541         &sensor_dev_attr_pwm1_max.dev_attr.attr,
 542         NULL
 543 };
 544
 545 static const struct attribute_group hwmon_default_attrgroup = {
 546         .attrs = hwmon_default_attributes,
 547 };
 548 static const struct attribute_group hwmon_temp_attrgroup = {
 549         .attrs = hwmon_temp_attributes,
 550 };
 551 static const struct attribute_group hwmon_fan_rpm_attrgroup = {
 552         .attrs = hwmon_fan_rpm_attributes,
 553 };
 554 static const struct attribute_group hwmon_pwm_fan_attrgroup = {
 555         .attrs = hwmon_pwm_fan_attributes,
 556 };
 557 #endif
 558
 559 int
 560 nouveau_hwmon_init(struct drm_device *dev)
 561 {
 562 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 563         struct nouveau_drm *drm = nouveau_drm(dev);
 564         struct nvkm_therm *therm = nvxx_therm(&drm->device);
 565         struct nouveau_hwmon *hwmon;
 566         struct device *hwmon_dev;
 567         int ret = 0;
 568
 569         hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL);
 570         if (!hwmon)
 571                 return -ENOMEM;
 572         hwmon->dev = dev;
 573
 574         if (!therm || !therm->temp_get || !therm->attr_get || !therm->attr_set)
 575                 return -ENODEV;
 576
 577         hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 578         if (IS_ERR(hwmon_dev)) {
 579                 ret = PTR_ERR(hwmon_dev);
 580                 NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret);
 581                 return ret;
 582         }
 583         dev_set_drvdata(hwmon_dev, dev);
 584
 585         /* set the default attributes */
 586         ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_default_attrgroup);
 587         if (ret)
 588                 goto error;
 589
 590         /* if the card has a working thermal sensor */
 591         if (therm->temp_get(therm) >= 0) {
 592                 ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_temp_attrgroup);
 593                 if (ret)
 594                         goto error;
 595         }
 596
 597         /* if the card has a pwm fan */
 598         /*XXX: incorrect, need better detection for this, some boards have
 599          *     the gpio entries for pwm fan control even when there's no
 600          *     actual fan connected to it... therm table? */
 601         if (therm->fan_get && therm->fan_get(therm) >= 0) {
 602                 ret = sysfs_create_group(&hwmon_dev->kobj,
 603                                          &hwmon_pwm_fan_attrgroup);
 604                 if (ret)
 605                         goto error;
 606         }
 607
 608         /* if the card can read the fan rpm */
 609         if (therm->fan_sense(therm) >= 0) {
 610                 ret = sysfs_create_group(&hwmon_dev->kobj,
 611                                          &hwmon_fan_rpm_attrgroup);
 612                 if (ret)
 613                         goto error;
 614         }
 615
 616         hwmon->hwmon = hwmon_dev;
 617
 618         return 0;
 619
 620 error:
 621         NV_ERROR(drm, "Unable to create some hwmon sysfs files: %d\n", ret);
 622         hwmon_device_unregister(hwmon_dev);
 623         hwmon->hwmon = NULL;
 624         return ret;
 625 #else
 626         return 0;
 627 #endif
 628 }
 629
 630 void
 631 nouveau_hwmon_fini(struct drm_device *dev)
 632 {
 633 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 634         struct nouveau_hwmon *hwmon = nouveau_hwmon(dev);
 635
 636         if (hwmon->hwmon) {
 637                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_default_attrgroup);
 638                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_temp_attrgroup);
 639                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_pwm_fan_attrgroup);
 640                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_fan_rpm_attrgroup);
 641
 642                 hwmon_device_unregister(hwmon->hwmon);
 643         }
 644
 645         nouveau_drm(dev)->hwmon = NULL;
 646         kfree(hwmon);
 647 #endif
 648 }