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 #include <subdev/gpio.h>
  38 #include <subdev/timer.h>
  39 #include <subdev/therm.h>
  40
  41 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
  42 static ssize_t
  43 nouveau_hwmon_show_temp(struct device *d, struct device_attribute *a, char *buf)
  44 {
  45         struct drm_device *dev = dev_get_drvdata(d);
  46         struct nouveau_drm *drm = nouveau_drm(dev);
  47         struct nouveau_therm *therm = nouveau_therm(drm->device);
  48         int temp = therm->temp_get(therm);
  49
  50         if (temp < 0)
  51                 return temp;
  52
  53         return snprintf(buf, PAGE_SIZE, "%d\n", temp * 1000);
  54 }
  55 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, nouveau_hwmon_show_temp,
  56                                                   NULL, 0);
  57
  58 static ssize_t
  59 nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
  60                                          struct device_attribute *a, char *buf)
  61 {
  62         return snprintf(buf, PAGE_SIZE, "%d\n", 100);
  63 }
  64 static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, S_IRUGO,
  65                           nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0);
  66
  67 static ssize_t
  68 nouveau_hwmon_temp1_auto_point1_temp(struct device *d,
  69                                      struct device_attribute *a, char *buf)
  70 {
  71         struct drm_device *dev = dev_get_drvdata(d);
  72         struct nouveau_drm *drm = nouveau_drm(dev);
  73         struct nouveau_therm *therm = nouveau_therm(drm->device);
  74
  75         return snprintf(buf, PAGE_SIZE, "%d\n",
  76               therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_FAN_BOOST) * 1000);
  77 }
  78 static ssize_t
  79 nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
  80                                          struct device_attribute *a,
  81                                          const char *buf, size_t count)
  82 {
  83         struct drm_device *dev = dev_get_drvdata(d);
  84         struct nouveau_drm *drm = nouveau_drm(dev);
  85         struct nouveau_therm *therm = nouveau_therm(drm->device);
  86         long value;
  87
  88         if (kstrtol(buf, 10, &value) == -EINVAL)
  89                 return count;
  90
  91         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_FAN_BOOST,
  92                         value / 1000);
  93
  94         return count;
  95 }
  96 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp, S_IRUGO | S_IWUSR,
  97                           nouveau_hwmon_temp1_auto_point1_temp,
  98                           nouveau_hwmon_set_temp1_auto_point1_temp, 0);
  99
 100 static ssize_t
 101 nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device *d,
 102                                           struct device_attribute *a, char *buf)
 103 {
 104         struct drm_device *dev = dev_get_drvdata(d);
 105         struct nouveau_drm *drm = nouveau_drm(dev);
 106         struct nouveau_therm *therm = nouveau_therm(drm->device);
 107
 108         return snprintf(buf, PAGE_SIZE, "%d\n",
 109          therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000);
 110 }
 111 static ssize_t
 112 nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
 113                                               struct device_attribute *a,
 114                                               const char *buf, size_t count)
 115 {
 116         struct drm_device *dev = dev_get_drvdata(d);
 117         struct nouveau_drm *drm = nouveau_drm(dev);
 118         struct nouveau_therm *therm = nouveau_therm(drm->device);
 119         long value;
 120
 121         if (kstrtol(buf, 10, &value) == -EINVAL)
 122                 return count;
 123
 124         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_FAN_BOOST_HYST,
 125                         value / 1000);
 126
 127         return count;
 128 }
 129 static SENSOR_DEVICE_ATTR(temp1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
 130                           nouveau_hwmon_temp1_auto_point1_temp_hyst,
 131                           nouveau_hwmon_set_temp1_auto_point1_temp_hyst, 0);
 132
 133 static ssize_t
 134 nouveau_hwmon_max_temp(struct device *d, struct device_attribute *a, char *buf)
 135 {
 136         struct drm_device *dev = dev_get_drvdata(d);
 137         struct nouveau_drm *drm = nouveau_drm(dev);
 138         struct nouveau_therm *therm = nouveau_therm(drm->device);
 139
 140         return snprintf(buf, PAGE_SIZE, "%d\n",
 141                therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_DOWN_CLK) * 1000);
 142 }
 143 static ssize_t
 144 nouveau_hwmon_set_max_temp(struct device *d, struct device_attribute *a,
 145                                                 const char *buf, size_t count)
 146 {
 147         struct drm_device *dev = dev_get_drvdata(d);
 148         struct nouveau_drm *drm = nouveau_drm(dev);
 149         struct nouveau_therm *therm = nouveau_therm(drm->device);
 150         long value;
 151
 152         if (kstrtol(buf, 10, &value) == -EINVAL)
 153                 return count;
 154
 155         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_DOWN_CLK, value / 1000);
 156
 157         return count;
 158 }
 159 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, nouveau_hwmon_max_temp,
 160                                                   nouveau_hwmon_set_max_temp,
 161                                                   0);
 162
 163 static ssize_t
 164 nouveau_hwmon_max_temp_hyst(struct device *d, struct device_attribute *a,
 165                             char *buf)
 166 {
 167         struct drm_device *dev = dev_get_drvdata(d);
 168         struct nouveau_drm *drm = nouveau_drm(dev);
 169         struct nouveau_therm *therm = nouveau_therm(drm->device);
 170
 171         return snprintf(buf, PAGE_SIZE, "%d\n",
 172           therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_DOWN_CLK_HYST) * 1000);
 173 }
 174 static ssize_t
 175 nouveau_hwmon_set_max_temp_hyst(struct device *d, struct device_attribute *a,
 176                                                 const char *buf, size_t count)
 177 {
 178         struct drm_device *dev = dev_get_drvdata(d);
 179         struct nouveau_drm *drm = nouveau_drm(dev);
 180         struct nouveau_therm *therm = nouveau_therm(drm->device);
 181         long value;
 182
 183         if (kstrtol(buf, 10, &value) == -EINVAL)
 184                 return count;
 185
 186         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_DOWN_CLK_HYST,
 187                         value / 1000);
 188
 189         return count;
 190 }
 191 static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IRUGO | S_IWUSR,
 192                           nouveau_hwmon_max_temp_hyst,
 193                           nouveau_hwmon_set_max_temp_hyst, 0);
 194
 195 static ssize_t
 196 nouveau_hwmon_critical_temp(struct device *d, struct device_attribute *a,
 197                                                         char *buf)
 198 {
 199         struct drm_device *dev = dev_get_drvdata(d);
 200         struct nouveau_drm *drm = nouveau_drm(dev);
 201         struct nouveau_therm *therm = nouveau_therm(drm->device);
 202
 203         return snprintf(buf, PAGE_SIZE, "%d\n",
 204                therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_CRITICAL) * 1000);
 205 }
 206 static ssize_t
 207 nouveau_hwmon_set_critical_temp(struct device *d, struct device_attribute *a,
 208                                                             const char *buf,
 209                                                                 size_t count)
 210 {
 211         struct drm_device *dev = dev_get_drvdata(d);
 212         struct nouveau_drm *drm = nouveau_drm(dev);
 213         struct nouveau_therm *therm = nouveau_therm(drm->device);
 214         long value;
 215
 216         if (kstrtol(buf, 10, &value) == -EINVAL)
 217                 return count;
 218
 219         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_CRITICAL, value / 1000);
 220
 221         return count;
 222 }
 223 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
 224                                                 nouveau_hwmon_critical_temp,
 225                                                 nouveau_hwmon_set_critical_temp,
 226                                                 0);
 227
 228 static ssize_t
 229 nouveau_hwmon_critical_temp_hyst(struct device *d, struct device_attribute *a,
 230                                                         char *buf)
 231 {
 232         struct drm_device *dev = dev_get_drvdata(d);
 233         struct nouveau_drm *drm = nouveau_drm(dev);
 234         struct nouveau_therm *therm = nouveau_therm(drm->device);
 235
 236         return snprintf(buf, PAGE_SIZE, "%d\n",
 237           therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_CRITICAL_HYST) * 1000);
 238 }
 239 static ssize_t
 240 nouveau_hwmon_set_critical_temp_hyst(struct device *d,
 241                                      struct device_attribute *a,
 242                                      const char *buf,
 243                                      size_t count)
 244 {
 245         struct drm_device *dev = dev_get_drvdata(d);
 246         struct nouveau_drm *drm = nouveau_drm(dev);
 247         struct nouveau_therm *therm = nouveau_therm(drm->device);
 248         long value;
 249
 250         if (kstrtol(buf, 10, &value) == -EINVAL)
 251                 return count;
 252
 253         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_CRITICAL_HYST,
 254                         value / 1000);
 255
 256         return count;
 257 }
 258 static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO | S_IWUSR,
 259                           nouveau_hwmon_critical_temp_hyst,
 260                           nouveau_hwmon_set_critical_temp_hyst, 0);
 261 static ssize_t
 262 nouveau_hwmon_emergency_temp(struct device *d, struct device_attribute *a,
 263                                                         char *buf)
 264 {
 265         struct drm_device *dev = dev_get_drvdata(d);
 266         struct nouveau_drm *drm = nouveau_drm(dev);
 267         struct nouveau_therm *therm = nouveau_therm(drm->device);
 268
 269         return snprintf(buf, PAGE_SIZE, "%d\n",
 270                therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_SHUTDOWN) * 1000);
 271 }
 272 static ssize_t
 273 nouveau_hwmon_set_emergency_temp(struct device *d, struct device_attribute *a,
 274                                                             const char *buf,
 275                                                                 size_t count)
 276 {
 277         struct drm_device *dev = dev_get_drvdata(d);
 278         struct nouveau_drm *drm = nouveau_drm(dev);
 279         struct nouveau_therm *therm = nouveau_therm(drm->device);
 280         long value;
 281
 282         if (kstrtol(buf, 10, &value) == -EINVAL)
 283                 return count;
 284
 285         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_SHUTDOWN, value / 1000);
 286
 287         return count;
 288 }
 289 static SENSOR_DEVICE_ATTR(temp1_emergency, S_IRUGO | S_IWUSR,
 290                                         nouveau_hwmon_emergency_temp,
 291                                         nouveau_hwmon_set_emergency_temp,
 292                                         0);
 293
 294 static ssize_t
 295 nouveau_hwmon_emergency_temp_hyst(struct device *d, struct device_attribute *a,
 296                                                         char *buf)
 297 {
 298         struct drm_device *dev = dev_get_drvdata(d);
 299         struct nouveau_drm *drm = nouveau_drm(dev);
 300         struct nouveau_therm *therm = nouveau_therm(drm->device);
 301
 302         return snprintf(buf, PAGE_SIZE, "%d\n",
 303           therm->attr_get(therm, NOUVEAU_THERM_ATTR_THRS_SHUTDOWN_HYST) * 1000);
 304 }
 305 static ssize_t
 306 nouveau_hwmon_set_emergency_temp_hyst(struct device *d,
 307                                       struct device_attribute *a,
 308                                       const char *buf,
 309                                       size_t count)
 310 {
 311         struct drm_device *dev = dev_get_drvdata(d);
 312         struct nouveau_drm *drm = nouveau_drm(dev);
 313         struct nouveau_therm *therm = nouveau_therm(drm->device);
 314         long value;
 315
 316         if (kstrtol(buf, 10, &value) == -EINVAL)
 317                 return count;
 318
 319         therm->attr_set(therm, NOUVEAU_THERM_ATTR_THRS_SHUTDOWN_HYST,
 320                         value / 1000);
 321
 322         return count;
 323 }
 324 static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO | S_IWUSR,
 325                                         nouveau_hwmon_emergency_temp_hyst,
 326                                         nouveau_hwmon_set_emergency_temp_hyst,
 327                                         0);
 328
 329 static ssize_t nouveau_hwmon_show_name(struct device *dev,
 330                                       struct device_attribute *attr,
 331                                       char *buf)
 332 {
 333         return sprintf(buf, "nouveau\n");
 334 }
 335 static SENSOR_DEVICE_ATTR(name, S_IRUGO, nouveau_hwmon_show_name, NULL, 0);
 336
 337 static ssize_t nouveau_hwmon_show_update_rate(struct device *dev,
 338                                       struct device_attribute *attr,
 339                                       char *buf)
 340 {
 341         return sprintf(buf, "1000\n");
 342 }
 343 static SENSOR_DEVICE_ATTR(update_rate, S_IRUGO,
 344                                                 nouveau_hwmon_show_update_rate,
 345                                                 NULL, 0);
 346
 347 static ssize_t
 348 nouveau_hwmon_show_fan1_input(struct device *d, struct device_attribute *attr,
 349                               char *buf)
 350 {
 351         struct drm_device *dev = dev_get_drvdata(d);
 352         struct nouveau_drm *drm = nouveau_drm(dev);
 353         struct nouveau_therm *therm = nouveau_therm(drm->device);
 354
 355         return snprintf(buf, PAGE_SIZE, "%d\n", therm->fan_sense(therm));
 356 }
 357 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, nouveau_hwmon_show_fan1_input,
 358                           NULL, 0);
 359
 360  static ssize_t
 361 nouveau_hwmon_get_pwm1_enable(struct device *d,
 362                            struct device_attribute *a, char *buf)
 363 {
 364         struct drm_device *dev = dev_get_drvdata(d);
 365         struct nouveau_drm *drm = nouveau_drm(dev);
 366         struct nouveau_therm *therm = nouveau_therm(drm->device);
 367         int ret;
 368
 369         ret = therm->attr_get(therm, NOUVEAU_THERM_ATTR_FAN_MODE);
 370         if (ret < 0)
 371                 return ret;
 372
 373         return sprintf(buf, "%i\n", ret);
 374 }
 375
 376 static ssize_t
 377 nouveau_hwmon_set_pwm1_enable(struct device *d, struct device_attribute *a,
 378                            const char *buf, size_t count)
 379 {
 380         struct drm_device *dev = dev_get_drvdata(d);
 381         struct nouveau_drm *drm = nouveau_drm(dev);
 382         struct nouveau_therm *therm = nouveau_therm(drm->device);
 383         long value;
 384         int ret;
 385
 386         ret = kstrtol(buf, 10, &value);
 387         if (ret)
 388                 return ret;
 389
 390         ret = therm->attr_set(therm, NOUVEAU_THERM_ATTR_FAN_MODE, value);
 391         if (ret)
 392                 return ret;
 393         else
 394                 return count;
 395 }
 396 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 397                           nouveau_hwmon_get_pwm1_enable,
 398                           nouveau_hwmon_set_pwm1_enable, 0);
 399
 400 static ssize_t
 401 nouveau_hwmon_get_pwm1(struct device *d, struct device_attribute *a, char *buf)
 402 {
 403         struct drm_device *dev = dev_get_drvdata(d);
 404         struct nouveau_drm *drm = nouveau_drm(dev);
 405         struct nouveau_therm *therm = nouveau_therm(drm->device);
 406         int ret;
 407
 408         ret = therm->fan_get(therm);
 409         if (ret < 0)
 410                 return ret;
 411
 412         return sprintf(buf, "%i\n", ret);
 413 }
 414
 415 static ssize_t
 416 nouveau_hwmon_set_pwm1(struct device *d, struct device_attribute *a,
 417                        const char *buf, size_t count)
 418 {
 419         struct drm_device *dev = dev_get_drvdata(d);
 420         struct nouveau_drm *drm = nouveau_drm(dev);
 421         struct nouveau_therm *therm = nouveau_therm(drm->device);
 422         int ret = -ENODEV;
 423         long value;
 424
 425         if (kstrtol(buf, 10, &value) == -EINVAL)
 426                 return -EINVAL;
 427
 428         ret = therm->fan_set(therm, value);
 429         if (ret)
 430                 return ret;
 431
 432         return count;
 433 }
 434
 435 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR,
 436                           nouveau_hwmon_get_pwm1,
 437                           nouveau_hwmon_set_pwm1, 0);
 438
 439 static ssize_t
 440 nouveau_hwmon_get_pwm1_min(struct device *d,
 441                            struct device_attribute *a, char *buf)
 442 {
 443         struct drm_device *dev = dev_get_drvdata(d);
 444         struct nouveau_drm *drm = nouveau_drm(dev);
 445         struct nouveau_therm *therm = nouveau_therm(drm->device);
 446         int ret;
 447
 448         ret = therm->attr_get(therm, NOUVEAU_THERM_ATTR_FAN_MIN_DUTY);
 449         if (ret < 0)
 450                 return ret;
 451
 452         return sprintf(buf, "%i\n", ret);
 453 }
 454
 455 static ssize_t
 456 nouveau_hwmon_set_pwm1_min(struct device *d, struct device_attribute *a,
 457                            const char *buf, size_t count)
 458 {
 459         struct drm_device *dev = dev_get_drvdata(d);
 460         struct nouveau_drm *drm = nouveau_drm(dev);
 461         struct nouveau_therm *therm = nouveau_therm(drm->device);
 462         long value;
 463         int ret;
 464
 465         if (kstrtol(buf, 10, &value) == -EINVAL)
 466                 return -EINVAL;
 467
 468         ret = therm->attr_set(therm, NOUVEAU_THERM_ATTR_FAN_MIN_DUTY, value);
 469         if (ret < 0)
 470                 return ret;
 471
 472         return count;
 473 }
 474
 475 static SENSOR_DEVICE_ATTR(pwm1_min, S_IRUGO | S_IWUSR,
 476                           nouveau_hwmon_get_pwm1_min,
 477                           nouveau_hwmon_set_pwm1_min, 0);
 478
 479 static ssize_t
 480 nouveau_hwmon_get_pwm1_max(struct device *d,
 481                            struct device_attribute *a, char *buf)
 482 {
 483         struct drm_device *dev = dev_get_drvdata(d);
 484         struct nouveau_drm *drm = nouveau_drm(dev);
 485         struct nouveau_therm *therm = nouveau_therm(drm->device);
 486         int ret;
 487
 488         ret = therm->attr_get(therm, NOUVEAU_THERM_ATTR_FAN_MAX_DUTY);
 489         if (ret < 0)
 490                 return ret;
 491
 492         return sprintf(buf, "%i\n", ret);
 493 }
 494
 495 static ssize_t
 496 nouveau_hwmon_set_pwm1_max(struct device *d, struct device_attribute *a,
 497                            const char *buf, size_t count)
 498 {
 499         struct drm_device *dev = dev_get_drvdata(d);
 500         struct nouveau_drm *drm = nouveau_drm(dev);
 501         struct nouveau_therm *therm = nouveau_therm(drm->device);
 502         long value;
 503         int ret;
 504
 505         if (kstrtol(buf, 10, &value) == -EINVAL)
 506                 return -EINVAL;
 507
 508         ret = therm->attr_set(therm, NOUVEAU_THERM_ATTR_FAN_MAX_DUTY, value);
 509         if (ret < 0)
 510                 return ret;
 511
 512         return count;
 513 }
 514
 515 static SENSOR_DEVICE_ATTR(pwm1_max, S_IRUGO | S_IWUSR,
 516                           nouveau_hwmon_get_pwm1_max,
 517                           nouveau_hwmon_set_pwm1_max, 0);
 518
 519 static struct attribute *hwmon_default_attributes[] = {
 520         &sensor_dev_attr_name.dev_attr.attr,
 521         &sensor_dev_attr_update_rate.dev_attr.attr,
 522         NULL
 523 };
 524 static struct attribute *hwmon_temp_attributes[] = {
 525         &sensor_dev_attr_temp1_input.dev_attr.attr,
 526         &sensor_dev_attr_temp1_auto_point1_pwm.dev_attr.attr,
 527         &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
 528         &sensor_dev_attr_temp1_auto_point1_temp_hyst.dev_attr.attr,
 529         &sensor_dev_attr_temp1_max.dev_attr.attr,
 530         &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
 531         &sensor_dev_attr_temp1_crit.dev_attr.attr,
 532         &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
 533         &sensor_dev_attr_temp1_emergency.dev_attr.attr,
 534         &sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
 535         NULL
 536 };
 537 static struct attribute *hwmon_fan_rpm_attributes[] = {
 538         &sensor_dev_attr_fan1_input.dev_attr.attr,
 539         NULL
 540 };
 541 static struct attribute *hwmon_pwm_fan_attributes[] = {
 542         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 543         &sensor_dev_attr_pwm1.dev_attr.attr,
 544         &sensor_dev_attr_pwm1_min.dev_attr.attr,
 545         &sensor_dev_attr_pwm1_max.dev_attr.attr,
 546         NULL
 547 };
 548
 549 static const struct attribute_group hwmon_default_attrgroup = {
 550         .attrs = hwmon_default_attributes,
 551 };
 552 static const struct attribute_group hwmon_temp_attrgroup = {
 553         .attrs = hwmon_temp_attributes,
 554 };
 555 static const struct attribute_group hwmon_fan_rpm_attrgroup = {
 556         .attrs = hwmon_fan_rpm_attributes,
 557 };
 558 static const struct attribute_group hwmon_pwm_fan_attrgroup = {
 559         .attrs = hwmon_pwm_fan_attributes,
 560 };
 561 #endif
 562
 563 int
 564 nouveau_hwmon_init(struct drm_device *dev)
 565 {
 566 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 567         struct nouveau_drm *drm = nouveau_drm(dev);
 568         struct nouveau_therm *therm = nouveau_therm(drm->device);
 569         struct nouveau_hwmon *hwmon;
 570         struct device *hwmon_dev;
 571         int ret = 0;
 572
 573         hwmon = drm->hwmon = kzalloc(sizeof(*hwmon), GFP_KERNEL);
 574         if (!hwmon)
 575                 return -ENOMEM;
 576         hwmon->dev = dev;
 577
 578         if (!therm || !therm->temp_get || !therm->attr_get || !therm->attr_set)
 579                 return -ENODEV;
 580
 581         hwmon_dev = hwmon_device_register(&dev->pdev->dev);
 582         if (IS_ERR(hwmon_dev)) {
 583                 ret = PTR_ERR(hwmon_dev);
 584                 NV_ERROR(drm, "Unable to register hwmon device: %d\n", ret);
 585                 return ret;
 586         }
 587         dev_set_drvdata(hwmon_dev, dev);
 588
 589         /* set the default attributes */
 590         ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_default_attrgroup);
 591         if (ret)
 592                 goto error;
 593
 594         /* if the card has a working thermal sensor */
 595         if (therm->temp_get(therm) >= 0) {
 596                 ret = sysfs_create_group(&hwmon_dev->kobj, &hwmon_temp_attrgroup);
 597                 if (ret)
 598                         goto error;
 599         }
 600
 601         /* if the card has a pwm fan */
 602         /*XXX: incorrect, need better detection for this, some boards have
 603          *     the gpio entries for pwm fan control even when there's no
 604          *     actual fan connected to it... therm table? */
 605         if (therm->fan_get && therm->fan_get(therm) >= 0) {
 606                 ret = sysfs_create_group(&hwmon_dev->kobj,
 607                                          &hwmon_pwm_fan_attrgroup);
 608                 if (ret)
 609                         goto error;
 610         }
 611
 612         /* if the card can read the fan rpm */
 613         if (therm->fan_sense(therm) >= 0) {
 614                 ret = sysfs_create_group(&hwmon_dev->kobj,
 615                                          &hwmon_fan_rpm_attrgroup);
 616                 if (ret)
 617                         goto error;
 618         }
 619
 620         hwmon->hwmon = hwmon_dev;
 621
 622         return 0;
 623
 624 error:
 625         NV_ERROR(drm, "Unable to create some hwmon sysfs files: %d\n", ret);
 626         hwmon_device_unregister(hwmon_dev);
 627         hwmon->hwmon = NULL;
 628         return ret;
 629 #else
 630         return 0;
 631 #endif
 632 }
 633
 634 void
 635 nouveau_hwmon_fini(struct drm_device *dev)
 636 {
 637 #if defined(CONFIG_HWMON) || (defined(MODULE) && defined(CONFIG_HWMON_MODULE))
 638         struct nouveau_hwmon *hwmon = nouveau_hwmon(dev);
 639
 640         if (hwmon->hwmon) {
 641                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_default_attrgroup);
 642                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_temp_attrgroup);
 643                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_pwm_fan_attrgroup);
 644                 sysfs_remove_group(&hwmon->hwmon->kobj, &hwmon_fan_rpm_attrgroup);
 645
 646                 hwmon_device_unregister(hwmon->hwmon);
 647         }
 648
 649         nouveau_drm(dev)->hwmon = NULL;
 650         kfree(hwmon);
 651 #endif
 652 }