include/linux/thermal.h

   1 /*
   2  *  thermal.h  ($Revision: 0 $)
   3  *
   4  *  Copyright (C) 2008  Intel Corp
   5  *  Copyright (C) 2008  Zhang Rui <rui.zhang@intel.com>
   6  *  Copyright (C) 2008  Sujith Thomas <sujith.thomas@intel.com>
   7  *
   8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; version 2 of the License.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  21  *
  22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  */
  24
  25 #ifndef __THERMAL_H__
  26 #define __THERMAL_H__
  27
  28 #include <linux/of.h>
  29 #include <linux/idr.h>
  30 #include <linux/device.h>
  31 #include <linux/workqueue.h>
  32 #include <uapi/linux/thermal.h>
  33
  34 #define THERMAL_TRIPS_NONE      -1
  35 #define THERMAL_MAX_TRIPS       12
  36
  37 /* invalid cooling state */
  38 #define THERMAL_CSTATE_INVALID -1UL
  39
  40 /* No upper/lower limit requirement */
  41 #define THERMAL_NO_LIMIT        ((u32)~0)
  42
  43 /* Default weight of a bound cooling device */
  44 #define THERMAL_WEIGHT_DEFAULT 0
  45
  46 /* use value, which < 0K, to indicate an invalid/uninitialized temperature */
  47 #define THERMAL_TEMP_INVALID    -274000
  48
  49 /* Unit conversion macros */
  50 #define DECI_KELVIN_TO_CELSIUS(t)       ({                      \
  51         long _t = (t);                                          \
  52         ((_t-2732 >= 0) ? (_t-2732+5)/10 : (_t-2732-5)/10);     \
  53 })
  54 #define CELSIUS_TO_DECI_KELVIN(t)       ((t)*10+2732)
  55 #define DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, off) (((t) - (off)) * 100)
  56 #define DECI_KELVIN_TO_MILLICELSIUS(t) DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, 2732)
  57 #define MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, off) (((t) / 100) + (off))
  58 #define MILLICELSIUS_TO_DECI_KELVIN(t) MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, 2732)
  59
  60 /* Default Thermal Governor */
  61 #if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE)
  62 #define DEFAULT_THERMAL_GOVERNOR       "step_wise"
  63 #elif defined(CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE)
  64 #define DEFAULT_THERMAL_GOVERNOR       "fair_share"
  65 #elif defined(CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE)
  66 #define DEFAULT_THERMAL_GOVERNOR       "user_space"
  67 #elif defined(CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR)
  68 #define DEFAULT_THERMAL_GOVERNOR       "power_allocator"
  69 #endif
  70
  71 struct thermal_zone_device;
  72 struct thermal_cooling_device;
  73 struct thermal_instance;
  74
  75 enum thermal_device_mode {
  76         THERMAL_DEVICE_DISABLED = 0,
  77         THERMAL_DEVICE_ENABLED,
  78 };
  79
  80 enum thermal_trip_type {
  81         THERMAL_TRIP_ACTIVE = 0,
  82         THERMAL_TRIP_PASSIVE,
  83         THERMAL_TRIP_HOT,
  84         THERMAL_TRIP_CRITICAL,
  85 };
  86
  87 enum thermal_trend {
  88         THERMAL_TREND_STABLE, /* temperature is stable */
  89         THERMAL_TREND_RAISING, /* temperature is raising */
  90         THERMAL_TREND_DROPPING, /* temperature is dropping */
  91         THERMAL_TREND_RAISE_FULL, /* apply highest cooling action */
  92         THERMAL_TREND_DROP_FULL, /* apply lowest cooling action */
  93 };
  94
  95 /* Thermal notification reason */
  96 enum thermal_notify_event {
  97         THERMAL_EVENT_UNSPECIFIED, /* Unspecified event */
  98         THERMAL_EVENT_TEMP_SAMPLE, /* New Temperature sample */
  99         THERMAL_TRIP_VIOLATED, /* TRIP Point violation */
 100         THERMAL_TRIP_CHANGED, /* TRIP Point temperature changed */
 101         THERMAL_DEVICE_DOWN, /* Thermal device is down */
 102         THERMAL_DEVICE_UP, /* Thermal device is up after a down event */
 103         THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */
 104 };
 105
 106 struct thermal_zone_device_ops {
 107         int (*bind) (struct thermal_zone_device *,
 108                      struct thermal_cooling_device *);
 109         int (*unbind) (struct thermal_zone_device *,
 110                        struct thermal_cooling_device *);
 111         int (*get_temp) (struct thermal_zone_device *, int *);
 112         int (*set_trips) (struct thermal_zone_device *, int, int);
 113         int (*get_mode) (struct thermal_zone_device *,
 114                          enum thermal_device_mode *);
 115         int (*set_mode) (struct thermal_zone_device *,
 116                 enum thermal_device_mode);
 117         int (*get_trip_type) (struct thermal_zone_device *, int,
 118                 enum thermal_trip_type *);
 119         int (*get_trip_temp) (struct thermal_zone_device *, int, int *);
 120         int (*set_trip_temp) (struct thermal_zone_device *, int, int);
 121         int (*get_trip_hyst) (struct thermal_zone_device *, int, int *);
 122         int (*set_trip_hyst) (struct thermal_zone_device *, int, int);
 123         int (*get_crit_temp) (struct thermal_zone_device *, int *);
 124         int (*set_emul_temp) (struct thermal_zone_device *, int);
 125         int (*get_trend) (struct thermal_zone_device *, int,
 126                           enum thermal_trend *);
 127         int (*notify) (struct thermal_zone_device *, int,
 128                        enum thermal_trip_type);
 129 };
 130
 131 struct thermal_cooling_device_ops {
 132         int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
 133         int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
 134         int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
 135         int (*get_requested_power)(struct thermal_cooling_device *,
 136                                    struct thermal_zone_device *, u32 *);
 137         int (*state2power)(struct thermal_cooling_device *,
 138                            struct thermal_zone_device *, unsigned long, u32 *);
 139         int (*power2state)(struct thermal_cooling_device *,
 140                            struct thermal_zone_device *, u32, unsigned long *);
 141 };
 142
 143 struct thermal_cooling_device {
 144         int id;
 145         char type[THERMAL_NAME_LENGTH];
 146         struct device device;
 147         struct device_node *np;
 148         void *devdata;
 149         const struct thermal_cooling_device_ops *ops;
 150         bool updated; /* true if the cooling device does not need update */
 151         struct mutex lock; /* protect thermal_instances list */
 152         struct list_head thermal_instances;
 153         struct list_head node;
 154 };
 155
 156 struct thermal_attr {
 157         struct device_attribute attr;
 158         char name[THERMAL_NAME_LENGTH];
 159 };
 160
 161 /**
 162  * struct thermal_zone_device - structure for a thermal zone
 163  * @id:         unique id number for each thermal zone
 164  * @type:       the thermal zone device type
 165  * @device:     &struct device for this thermal zone
 166  * @trip_temp_attrs:    attributes for trip points for sysfs: trip temperature
 167  * @trip_type_attrs:    attributes for trip points for sysfs: trip type
 168  * @trip_hyst_attrs:    attributes for trip points for sysfs: trip hysteresis
 169  * @devdata:    private pointer for device private data
 170  * @trips:      number of trip points the thermal zone supports
 171  * @trips_disabled;     bitmap for disabled trips
 172  * @passive_delay:      number of milliseconds to wait between polls when
 173  *                      performing passive cooling.
 174  * @polling_delay:      number of milliseconds to wait between polls when
 175  *                      checking whether trip points have been crossed (0 for
 176  *                      interrupt driven systems)
 177  * @temperature:        current temperature.  This is only for core code,
 178  *                      drivers should use thermal_zone_get_temp() to get the
 179  *                      current temperature
 180  * @last_temperature:   previous temperature read
 181  * @emul_temperature:   emulated temperature when using CONFIG_THERMAL_EMULATION
 182  * @passive:            1 if you've crossed a passive trip point, 0 otherwise.
 183  * @prev_low_trip:      the low current temperature if you've crossed a passive
 184                         trip point.
 185  * @prev_high_trip:     the above current temperature if you've crossed a
 186                         passive trip point.
 187  * @forced_passive:     If > 0, temperature at which to switch on all ACPI
 188  *                      processor cooling devices.  Currently only used by the
 189  *                      step-wise governor.
 190  * @need_update:        if equals 1, thermal_zone_device_update needs to be invoked.
 191  * @ops:        operations this &thermal_zone_device supports
 192  * @tzp:        thermal zone parameters
 193  * @governor:   pointer to the governor for this thermal zone
 194  * @governor_data:      private pointer for governor data
 195  * @thermal_instances:  list of &struct thermal_instance of this thermal zone
 196  * @idr:        &struct idr to generate unique id for this zone's cooling
 197  *              devices
 198  * @lock:       lock to protect thermal_instances list
 199  * @node:       node in thermal_tz_list (in thermal_core.c)
 200  * @poll_queue: delayed work for polling
 201  * @notify_event: Last notification event
 202  */
 203 struct thermal_zone_device {
 204         int id;
 205         char type[THERMAL_NAME_LENGTH];
 206         struct device device;
 207         struct thermal_attr *trip_temp_attrs;
 208         struct thermal_attr *trip_type_attrs;
 209         struct thermal_attr *trip_hyst_attrs;
 210         void *devdata;
 211         int trips;
 212         unsigned long trips_disabled;   /* bitmap for disabled trips */
 213         int passive_delay;
 214         int polling_delay;
 215         int temperature;
 216         int last_temperature;
 217         int emul_temperature;
 218         int passive;
 219         int prev_low_trip;
 220         int prev_high_trip;
 221         unsigned int forced_passive;
 222         atomic_t need_update;
 223         struct thermal_zone_device_ops *ops;
 224         struct thermal_zone_params *tzp;
 225         struct thermal_governor *governor;
 226         void *governor_data;
 227         struct list_head thermal_instances;
 228         struct idr idr;
 229         struct mutex lock;
 230         struct list_head node;
 231         struct delayed_work poll_queue;
 232         enum thermal_notify_event notify_event;
 233 };
 234
 235 /**
 236  * struct thermal_governor - structure that holds thermal governor information
 237  * @name:       name of the governor
 238  * @bind_to_tz: callback called when binding to a thermal zone.  If it
 239  *              returns 0, the governor is bound to the thermal zone,
 240  *              otherwise it fails.
 241  * @unbind_from_tz:     callback called when a governor is unbound from a
 242  *                      thermal zone.
 243  * @throttle:   callback called for every trip point even if temperature is
 244  *              below the trip point temperature
 245  * @governor_list:      node in thermal_governor_list (in thermal_core.c)
 246  */
 247 struct thermal_governor {
 248         char name[THERMAL_NAME_LENGTH];
 249         int (*bind_to_tz)(struct thermal_zone_device *tz);
 250         void (*unbind_from_tz)(struct thermal_zone_device *tz);
 251         int (*throttle)(struct thermal_zone_device *tz, int trip);
 252         struct list_head        governor_list;
 253 };
 254
 255 /* Structure that holds binding parameters for a zone */
 256 struct thermal_bind_params {
 257         struct thermal_cooling_device *cdev;
 258
 259         /*
 260          * This is a measure of 'how effectively these devices can
 261          * cool 'this' thermal zone. It shall be determined by
 262          * platform characterization. This value is relative to the
 263          * rest of the weights so a cooling device whose weight is
 264          * double that of another cooling device is twice as
 265          * effective. See Documentation/thermal/sysfs-api.txt for more
 266          * information.
 267          */
 268         int weight;
 269
 270         /*
 271          * This is a bit mask that gives the binding relation between this
 272          * thermal zone and cdev, for a particular trip point.
 273          * See Documentation/thermal/sysfs-api.txt for more information.
 274          */
 275         int trip_mask;
 276
 277         /*
 278          * This is an array of cooling state limits. Must have exactly
 279          * 2 * thermal_zone.number_of_trip_points. It is an array consisting
 280          * of tuples <lower-state upper-state> of state limits. Each trip
 281          * will be associated with one state limit tuple when binding.
 282          * A NULL pointer means <THERMAL_NO_LIMITS THERMAL_NO_LIMITS>
 283          * on all trips.
 284          */
 285         unsigned long *binding_limits;
 286         int (*match) (struct thermal_zone_device *tz,
 287                         struct thermal_cooling_device *cdev);
 288 };
 289
 290 /* Structure to define Thermal Zone parameters */
 291 struct thermal_zone_params {
 292         char governor_name[THERMAL_NAME_LENGTH];
 293
 294         /*
 295          * a boolean to indicate if the thermal to hwmon sysfs interface
 296          * is required. when no_hwmon == false, a hwmon sysfs interface
 297          * will be created. when no_hwmon == true, nothing will be done
 298          */
 299         bool no_hwmon;
 300
 301         int num_tbps;   /* Number of tbp entries */
 302         struct thermal_bind_params *tbp;
 303
 304         /*
 305          * Sustainable power (heat) that this thermal zone can dissipate in
 306          * mW
 307          */
 308         u32 sustainable_power;
 309
 310         /*
 311          * Proportional parameter of the PID controller when
 312          * overshooting (i.e., when temperature is below the target)
 313          */
 314         s32 k_po;
 315
 316         /*
 317          * Proportional parameter of the PID controller when
 318          * undershooting
 319          */
 320         s32 k_pu;
 321
 322         /* Integral parameter of the PID controller */
 323         s32 k_i;
 324
 325         /* Derivative parameter of the PID controller */
 326         s32 k_d;
 327
 328         /* threshold below which the error is no longer accumulated */
 329         s32 integral_cutoff;
 330
 331         /*
 332          * @slope:      slope of a linear temperature adjustment curve.
 333          *              Used by thermal zone drivers.
 334          */
 335         int slope;
 336         /*
 337          * @offset:     offset of a linear temperature adjustment curve.
 338          *              Used by thermal zone drivers (default 0).
 339          */
 340         int offset;
 341 };
 342
 343 struct thermal_genl_event {
 344         u32 orig;
 345         enum events event;
 346 };
 347
 348 /**
 349  * struct thermal_zone_of_device_ops - scallbacks for handling DT based zones
 350  *
 351  * Mandatory:
 352  * @get_temp: a pointer to a function that reads the sensor temperature.
 353  *
 354  * Optional:
 355  * @get_trend: a pointer to a function that reads the sensor temperature trend.
 356  * @set_trips: a pointer to a function that sets a temperature window. When
 357  *             this window is left the driver must inform the thermal core via
 358  *             thermal_zone_device_update.
 359  * @set_emul_temp: a pointer to a function that sets sensor emulated
 360  *                 temperature.
 361  * @set_trip_temp: a pointer to a function that sets the trip temperature on
 362  *                 hardware.
 363  */
 364 struct thermal_zone_of_device_ops {
 365         int (*get_temp)(void *, int *);
 366         int (*get_trend)(void *, int, enum thermal_trend *);
 367         int (*set_trips)(void *, int, int);
 368         int (*set_emul_temp)(void *, int);
 369         int (*set_trip_temp)(void *, int, int);
 370 };
 371
 372 /**
 373  * struct thermal_trip - representation of a point in temperature domain
 374  * @np: pointer to struct device_node that this trip point was created from
 375  * @temperature: temperature value in miliCelsius
 376  * @hysteresis: relative hysteresis in miliCelsius
 377  * @type: trip point type
 378  */
 379
 380 struct thermal_trip {
 381         struct device_node *np;
 382         int temperature;
 383         int hysteresis;
 384         enum thermal_trip_type type;
 385 };
 386
 387 /* Function declarations */
 388 #ifdef CONFIG_THERMAL_OF
 389 struct thermal_zone_device *
 390 thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
 391                                 const struct thermal_zone_of_device_ops *ops);
 392 void thermal_zone_of_sensor_unregister(struct device *dev,
 393                                        struct thermal_zone_device *tz);
 394 struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
 395                 struct device *dev, int id, void *data,
 396                 const struct thermal_zone_of_device_ops *ops);
 397 void devm_thermal_zone_of_sensor_unregister(struct device *dev,
 398                                             struct thermal_zone_device *tz);
 399 #else
 400 static inline struct thermal_zone_device *
 401 thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
 402                                 const struct thermal_zone_of_device_ops *ops)
 403 {
 404         return ERR_PTR(-ENODEV);
 405 }
 406
 407 static inline
 408 void thermal_zone_of_sensor_unregister(struct device *dev,
 409                                        struct thermal_zone_device *tz)
 410 {
 411 }
 412
 413 static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
 414                 struct device *dev, int id, void *data,
 415                 const struct thermal_zone_of_device_ops *ops)
 416 {
 417         return ERR_PTR(-ENODEV);
 418 }
 419
 420 static inline
 421 void devm_thermal_zone_of_sensor_unregister(struct device *dev,
 422                                             struct thermal_zone_device *tz)
 423 {
 424 }
 425
 426 #endif
 427
 428 #if IS_ENABLED(CONFIG_THERMAL)
 429 static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 430 {
 431         return cdev->ops->get_requested_power && cdev->ops->state2power &&
 432                 cdev->ops->power2state;
 433 }
 434
 435 int power_actor_get_max_power(struct thermal_cooling_device *,
 436                               struct thermal_zone_device *tz, u32 *max_power);
 437 int power_actor_get_min_power(struct thermal_cooling_device *,
 438                               struct thermal_zone_device *tz, u32 *min_power);
 439 int power_actor_set_power(struct thermal_cooling_device *,
 440                           struct thermal_instance *, u32);
 441 struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
 442                 void *, struct thermal_zone_device_ops *,
 443                 struct thermal_zone_params *, int, int);
 444 void thermal_zone_device_unregister(struct thermal_zone_device *);
 445
 446 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
 447                                      struct thermal_cooling_device *,
 448                                      unsigned long, unsigned long,
 449                                      unsigned int);
 450 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
 451                                        struct thermal_cooling_device *);
 452 void thermal_zone_device_update(struct thermal_zone_device *,
 453                                 enum thermal_notify_event);
 454 void thermal_zone_set_trips(struct thermal_zone_device *);
 455
 456 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
 457                 const struct thermal_cooling_device_ops *);
 458 struct thermal_cooling_device *
 459 thermal_of_cooling_device_register(struct device_node *np, char *, void *,
 460                                    const struct thermal_cooling_device_ops *);
 461 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
 462 struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
 463 int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
 464 int thermal_zone_get_slope(struct thermal_zone_device *tz);
 465 int thermal_zone_get_offset(struct thermal_zone_device *tz);
 466
 467 int get_tz_trend(struct thermal_zone_device *, int);
 468 struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
 469                 struct thermal_cooling_device *, int);
 470 void thermal_cdev_update(struct thermal_cooling_device *);
 471 void thermal_notify_framework(struct thermal_zone_device *, int);
 472 #else
 473 static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 474 { return false; }
 475 static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev,
 476                               struct thermal_zone_device *tz, u32 *max_power)
 477 { return 0; }
 478 static inline int power_actor_get_min_power(struct thermal_cooling_device *cdev,
 479                                             struct thermal_zone_device *tz,
 480                                             u32 *min_power)
 481 { return -ENODEV; }
 482 static inline int power_actor_set_power(struct thermal_cooling_device *cdev,
 483                           struct thermal_instance *tz, u32 power)
 484 { return 0; }
 485 static inline struct thermal_zone_device *thermal_zone_device_register(
 486         const char *type, int trips, int mask, void *devdata,
 487         struct thermal_zone_device_ops *ops,
 488         const struct thermal_zone_params *tzp,
 489         int passive_delay, int polling_delay)
 490 { return ERR_PTR(-ENODEV); }
 491 static inline void thermal_zone_device_unregister(
 492         struct thermal_zone_device *tz)
 493 { }
 494 static inline int thermal_zone_bind_cooling_device(
 495         struct thermal_zone_device *tz, int trip,
 496         struct thermal_cooling_device *cdev,
 497         unsigned long upper, unsigned long lower,
 498         unsigned int weight)
 499 { return -ENODEV; }
 500 static inline int thermal_zone_unbind_cooling_device(
 501         struct thermal_zone_device *tz, int trip,
 502         struct thermal_cooling_device *cdev)
 503 { return -ENODEV; }
 504 static inline void thermal_zone_device_update(struct thermal_zone_device *tz,
 505                                               enum thermal_notify_event event)
 506 { }
 507 static inline void thermal_zone_set_trips(struct thermal_zone_device *tz)
 508 { }
 509 static inline struct thermal_cooling_device *
 510 thermal_cooling_device_register(char *type, void *devdata,
 511         const struct thermal_cooling_device_ops *ops)
 512 { return ERR_PTR(-ENODEV); }
 513 static inline struct thermal_cooling_device *
 514 thermal_of_cooling_device_register(struct device_node *np,
 515         char *type, void *devdata, const struct thermal_cooling_device_ops *ops)
 516 { return ERR_PTR(-ENODEV); }
 517 static inline void thermal_cooling_device_unregister(
 518         struct thermal_cooling_device *cdev)
 519 { }
 520 static inline struct thermal_zone_device *thermal_zone_get_zone_by_name(
 521                 const char *name)
 522 { return ERR_PTR(-ENODEV); }
 523 static inline int thermal_zone_get_temp(
 524                 struct thermal_zone_device *tz, int *temp)
 525 { return -ENODEV; }
 526 static inline int thermal_zone_get_slope(
 527                 struct thermal_zone_device *tz)
 528 { return -ENODEV; }
 529 static inline int thermal_zone_get_offset(
 530                 struct thermal_zone_device *tz)
 531 { return -ENODEV; }
 532 static inline int get_tz_trend(struct thermal_zone_device *tz, int trip)
 533 { return -ENODEV; }
 534 static inline struct thermal_instance *
 535 get_thermal_instance(struct thermal_zone_device *tz,
 536         struct thermal_cooling_device *cdev, int trip)
 537 { return ERR_PTR(-ENODEV); }
 538 static inline void thermal_cdev_update(struct thermal_cooling_device *cdev)
 539 { }
 540 static inline void thermal_notify_framework(struct thermal_zone_device *tz,
 541         int trip)
 542 { }
 543 #endif /* CONFIG_THERMAL */
 544
 545 #if defined(CONFIG_NET) && IS_ENABLED(CONFIG_THERMAL)
 546 extern int thermal_generate_netlink_event(struct thermal_zone_device *tz,
 547                                                 enum events event);
 548 #else
 549 static inline int thermal_generate_netlink_event(struct thermal_zone_device *tz,
 550                                                 enum events event)
 551 {
 552         return 0;
 553 }
 554 #endif
 555
 556 #endif /* __THERMAL_H__ */