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/sysfs.h>
  32 #include <linux/workqueue.h>
  33 #include <uapi/linux/thermal.h>
  34
  35 #define THERMAL_TRIPS_NONE      -1
  36 #define THERMAL_MAX_TRIPS       12
  37
  38 /* invalid cooling state */
  39 #define THERMAL_CSTATE_INVALID -1UL
  40
  41 /* No upper/lower limit requirement */
  42 #define THERMAL_NO_LIMIT        ((u32)~0)
  43
  44 /* Default weight of a bound cooling device */
  45 #define THERMAL_WEIGHT_DEFAULT 0
  46
  47 /* use value, which < 0K, to indicate an invalid/uninitialized temperature */
  48 #define THERMAL_TEMP_INVALID    -274000
  49
  50 /* Unit conversion macros */
  51 #define DECI_KELVIN_TO_CELSIUS(t)       ({                      \
  52         long _t = (t);                                          \
  53         ((_t-2732 >= 0) ? (_t-2732+5)/10 : (_t-2732-5)/10);     \
  54 })
  55 #define CELSIUS_TO_DECI_KELVIN(t)       ((t)*10+2732)
  56 #define DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, off) (((t) - (off)) * 100)
  57 #define DECI_KELVIN_TO_MILLICELSIUS(t) DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, 2732)
  58 #define MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, off) (((t) / 100) + (off))
  59 #define MILLICELSIUS_TO_DECI_KELVIN(t) MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, 2732)
  60
  61 /* Default Thermal Governor */
  62 #if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE)
  63 #define DEFAULT_THERMAL_GOVERNOR       "step_wise"
  64 #elif defined(CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE)
  65 #define DEFAULT_THERMAL_GOVERNOR       "fair_share"
  66 #elif defined(CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE)
  67 #define DEFAULT_THERMAL_GOVERNOR       "user_space"
  68 #elif defined(CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR)
  69 #define DEFAULT_THERMAL_GOVERNOR       "power_allocator"
  70 #endif
  71
  72 struct thermal_zone_device;
  73 struct thermal_cooling_device;
  74 struct thermal_instance;
  75
  76 enum thermal_device_mode {
  77         THERMAL_DEVICE_DISABLED = 0,
  78         THERMAL_DEVICE_ENABLED,
  79 };
  80
  81 enum thermal_trip_type {
  82         THERMAL_TRIP_ACTIVE = 0,
  83         THERMAL_TRIP_PASSIVE,
  84         THERMAL_TRIP_HOT,
  85         THERMAL_TRIP_CRITICAL,
  86 };
  87
  88 enum thermal_trend {
  89         THERMAL_TREND_STABLE, /* temperature is stable */
  90         THERMAL_TREND_RAISING, /* temperature is raising */
  91         THERMAL_TREND_DROPPING, /* temperature is dropping */
  92         THERMAL_TREND_RAISE_FULL, /* apply highest cooling action */
  93         THERMAL_TREND_DROP_FULL, /* apply lowest cooling action */
  94 };
  95
  96 /* Thermal notification reason */
  97 enum thermal_notify_event {
  98         THERMAL_EVENT_UNSPECIFIED, /* Unspecified event */
  99         THERMAL_EVENT_TEMP_SAMPLE, /* New Temperature sample */
 100         THERMAL_TRIP_VIOLATED, /* TRIP Point violation */
 101         THERMAL_TRIP_CHANGED, /* TRIP Point temperature changed */
 102         THERMAL_DEVICE_DOWN, /* Thermal device is down */
 103         THERMAL_DEVICE_UP, /* Thermal device is up after a down event */
 104         THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */
 105 };
 106
 107 struct thermal_zone_device_ops {
 108         int (*bind) (struct thermal_zone_device *,
 109                      struct thermal_cooling_device *);
 110         int (*unbind) (struct thermal_zone_device *,
 111                        struct thermal_cooling_device *);
 112         int (*get_temp) (struct thermal_zone_device *, int *);
 113         int (*set_trips) (struct thermal_zone_device *, int, int);
 114         int (*get_mode) (struct thermal_zone_device *,
 115                          enum thermal_device_mode *);
 116         int (*set_mode) (struct thermal_zone_device *,
 117                 enum thermal_device_mode);
 118         int (*get_trip_type) (struct thermal_zone_device *, int,
 119                 enum thermal_trip_type *);
 120         int (*get_trip_temp) (struct thermal_zone_device *, int, int *);
 121         int (*set_trip_temp) (struct thermal_zone_device *, int, int);
 122         int (*get_trip_hyst) (struct thermal_zone_device *, int, int *);
 123         int (*set_trip_hyst) (struct thermal_zone_device *, int, int);
 124         int (*get_crit_temp) (struct thermal_zone_device *, int *);
 125         int (*set_emul_temp) (struct thermal_zone_device *, int);
 126         int (*get_trend) (struct thermal_zone_device *, int,
 127                           enum thermal_trend *);
 128         int (*notify) (struct thermal_zone_device *, int,
 129                        enum thermal_trip_type);
 130 };
 131
 132 struct thermal_cooling_device_ops {
 133         int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
 134         int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
 135         int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
 136         int (*get_requested_power)(struct thermal_cooling_device *,
 137                                    struct thermal_zone_device *, u32 *);
 138         int (*state2power)(struct thermal_cooling_device *,
 139                            struct thermal_zone_device *, unsigned long, u32 *);
 140         int (*power2state)(struct thermal_cooling_device *,
 141                            struct thermal_zone_device *, u32, unsigned long *);
 142 };
 143
 144 struct thermal_cooling_device {
 145         int id;
 146         char type[THERMAL_NAME_LENGTH];
 147         struct device device;
 148         struct device_node *np;
 149         void *devdata;
 150         const struct thermal_cooling_device_ops *ops;
 151         bool updated; /* true if the cooling device does not need update */
 152         struct mutex lock; /* protect thermal_instances list */
 153         struct list_head thermal_instances;
 154         struct list_head node;
 155 };
 156
 157 struct thermal_attr {
 158         struct device_attribute attr;
 159         char name[THERMAL_NAME_LENGTH];
 160 };
 161
 162 /**
 163  * struct thermal_zone_device - structure for a thermal zone
 164  * @id:         unique id number for each thermal zone
 165  * @type:       the thermal zone device type
 166  * @device:     &struct device for this thermal zone
 167  * @trip_temp_attrs:    attributes for trip points for sysfs: trip temperature
 168  * @trip_type_attrs:    attributes for trip points for sysfs: trip type
 169  * @trip_hyst_attrs:    attributes for trip points for sysfs: trip hysteresis
 170  * @devdata:    private pointer for device private data
 171  * @trips:      number of trip points the thermal zone supports
 172  * @trips_disabled;     bitmap for disabled trips
 173  * @passive_delay:      number of milliseconds to wait between polls when
 174  *                      performing passive cooling.
 175  * @polling_delay:      number of milliseconds to wait between polls when
 176  *                      checking whether trip points have been crossed (0 for
 177  *                      interrupt driven systems)
 178  * @temperature:        current temperature.  This is only for core code,
 179  *                      drivers should use thermal_zone_get_temp() to get the
 180  *                      current temperature
 181  * @last_temperature:   previous temperature read
 182  * @emul_temperature:   emulated temperature when using CONFIG_THERMAL_EMULATION
 183  * @passive:            1 if you've crossed a passive trip point, 0 otherwise.
 184  * @prev_low_trip:      the low current temperature if you've crossed a passive
 185                         trip point.
 186  * @prev_high_trip:     the above current temperature if you've crossed a
 187                         passive trip point.
 188  * @forced_passive:     If > 0, temperature at which to switch on all ACPI
 189  *                      processor cooling devices.  Currently only used by the
 190  *                      step-wise governor.
 191  * @need_update:        if equals 1, thermal_zone_device_update needs to be invoked.
 192  * @ops:        operations this &thermal_zone_device supports
 193  * @tzp:        thermal zone parameters
 194  * @governor:   pointer to the governor for this thermal zone
 195  * @governor_data:      private pointer for governor data
 196  * @thermal_instances:  list of &struct thermal_instance of this thermal zone
 197  * @ida:        &struct ida to generate unique id for this zone's cooling
 198  *              devices
 199  * @lock:       lock to protect thermal_instances list
 200  * @node:       node in thermal_tz_list (in thermal_core.c)
 201  * @poll_queue: delayed work for polling
 202  * @notify_event: Last notification event
 203  */
 204 struct thermal_zone_device {
 205         int id;
 206         char type[THERMAL_NAME_LENGTH];
 207         struct device device;
 208         struct attribute_group trips_attribute_group;
 209         struct thermal_attr *trip_temp_attrs;
 210         struct thermal_attr *trip_type_attrs;
 211         struct thermal_attr *trip_hyst_attrs;
 212         void *devdata;
 213         int trips;
 214         unsigned long trips_disabled;   /* bitmap for disabled trips */
 215         int passive_delay;
 216         int polling_delay;
 217         int temperature;
 218         int last_temperature;
 219         int emul_temperature;
 220         int passive;
 221         int prev_low_trip;
 222         int prev_high_trip;
 223         unsigned int forced_passive;
 224         atomic_t need_update;
 225         struct thermal_zone_device_ops *ops;
 226         struct thermal_zone_params *tzp;
 227         struct thermal_governor *governor;
 228         void *governor_data;
 229         struct list_head thermal_instances;
 230         struct ida ida;
 231         struct mutex lock;
 232         struct list_head node;
 233         struct delayed_work poll_queue;
 234         enum thermal_notify_event notify_event;
 235 };
 236
 237 /**
 238  * struct thermal_governor - structure that holds thermal governor information
 239  * @name:       name of the governor
 240  * @bind_to_tz: callback called when binding to a thermal zone.  If it
 241  *              returns 0, the governor is bound to the thermal zone,
 242  *              otherwise it fails.
 243  * @unbind_from_tz:     callback called when a governor is unbound from a
 244  *                      thermal zone.
 245  * @throttle:   callback called for every trip point even if temperature is
 246  *              below the trip point temperature
 247  * @governor_list:      node in thermal_governor_list (in thermal_core.c)
 248  */
 249 struct thermal_governor {
 250         char name[THERMAL_NAME_LENGTH];
 251         int (*bind_to_tz)(struct thermal_zone_device *tz);
 252         void (*unbind_from_tz)(struct thermal_zone_device *tz);
 253         int (*throttle)(struct thermal_zone_device *tz, int trip);
 254         struct list_head        governor_list;
 255 };
 256
 257 /* Structure that holds binding parameters for a zone */
 258 struct thermal_bind_params {
 259         struct thermal_cooling_device *cdev;
 260
 261         /*
 262          * This is a measure of 'how effectively these devices can
 263          * cool 'this' thermal zone. It shall be determined by
 264          * platform characterization. This value is relative to the
 265          * rest of the weights so a cooling device whose weight is
 266          * double that of another cooling device is twice as
 267          * effective. See Documentation/thermal/sysfs-api.txt for more
 268          * information.
 269          */
 270         int weight;
 271
 272         /*
 273          * This is a bit mask that gives the binding relation between this
 274          * thermal zone and cdev, for a particular trip point.
 275          * See Documentation/thermal/sysfs-api.txt for more information.
 276          */
 277         int trip_mask;
 278
 279         /*
 280          * This is an array of cooling state limits. Must have exactly
 281          * 2 * thermal_zone.number_of_trip_points. It is an array consisting
 282          * of tuples <lower-state upper-state> of state limits. Each trip
 283          * will be associated with one state limit tuple when binding.
 284          * A NULL pointer means <THERMAL_NO_LIMITS THERMAL_NO_LIMITS>
 285          * on all trips.
 286          */
 287         unsigned long *binding_limits;
 288         int (*match) (struct thermal_zone_device *tz,
 289                         struct thermal_cooling_device *cdev);
 290 };
 291
 292 /* Structure to define Thermal Zone parameters */
 293 struct thermal_zone_params {
 294         char governor_name[THERMAL_NAME_LENGTH];
 295
 296         /*
 297          * a boolean to indicate if the thermal to hwmon sysfs interface
 298          * is required. when no_hwmon == false, a hwmon sysfs interface
 299          * will be created. when no_hwmon == true, nothing will be done
 300          */
 301         bool no_hwmon;
 302
 303         int num_tbps;   /* Number of tbp entries */
 304         struct thermal_bind_params *tbp;
 305
 306         /*
 307          * Sustainable power (heat) that this thermal zone can dissipate in
 308          * mW
 309          */
 310         u32 sustainable_power;
 311
 312         /*
 313          * Proportional parameter of the PID controller when
 314          * overshooting (i.e., when temperature is below the target)
 315          */
 316         s32 k_po;
 317
 318         /*
 319          * Proportional parameter of the PID controller when
 320          * undershooting
 321          */
 322         s32 k_pu;
 323
 324         /* Integral parameter of the PID controller */
 325         s32 k_i;
 326
 327         /* Derivative parameter of the PID controller */
 328         s32 k_d;
 329
 330         /* threshold below which the error is no longer accumulated */
 331         s32 integral_cutoff;
 332
 333         /*
 334          * @slope:      slope of a linear temperature adjustment curve.
 335          *              Used by thermal zone drivers.
 336          */
 337         int slope;
 338         /*
 339          * @offset:     offset of a linear temperature adjustment curve.
 340          *              Used by thermal zone drivers (default 0).
 341          */
 342         int offset;
 343 };
 344
 345 struct thermal_genl_event {
 346         u32 orig;
 347         enum events event;
 348 };
 349
 350 /**
 351  * struct thermal_zone_of_device_ops - scallbacks for handling DT based zones
 352  *
 353  * Mandatory:
 354  * @get_temp: a pointer to a function that reads the sensor temperature.
 355  *
 356  * Optional:
 357  * @get_trend: a pointer to a function that reads the sensor temperature trend.
 358  * @set_trips: a pointer to a function that sets a temperature window. When
 359  *             this window is left the driver must inform the thermal core via
 360  *             thermal_zone_device_update.
 361  * @set_emul_temp: a pointer to a function that sets sensor emulated
 362  *                 temperature.
 363  * @set_trip_temp: a pointer to a function that sets the trip temperature on
 364  *                 hardware.
 365  */
 366 struct thermal_zone_of_device_ops {
 367         int (*get_temp)(void *, int *);
 368         int (*get_trend)(void *, int, enum thermal_trend *);
 369         int (*set_trips)(void *, int, int);
 370         int (*set_emul_temp)(void *, int);
 371         int (*set_trip_temp)(void *, int, int);
 372 };
 373
 374 /**
 375  * struct thermal_trip - representation of a point in temperature domain
 376  * @np: pointer to struct device_node that this trip point was created from
 377  * @temperature: temperature value in miliCelsius
 378  * @hysteresis: relative hysteresis in miliCelsius
 379  * @type: trip point type
 380  */
 381
 382 struct thermal_trip {
 383         struct device_node *np;
 384         int temperature;
 385         int hysteresis;
 386         enum thermal_trip_type type;
 387 };
 388
 389 /* Function declarations */
 390 #ifdef CONFIG_THERMAL_OF
 391 struct thermal_zone_device *
 392 thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
 393                                 const struct thermal_zone_of_device_ops *ops);
 394 void thermal_zone_of_sensor_unregister(struct device *dev,
 395                                        struct thermal_zone_device *tz);
 396 struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
 397                 struct device *dev, int id, void *data,
 398                 const struct thermal_zone_of_device_ops *ops);
 399 void devm_thermal_zone_of_sensor_unregister(struct device *dev,
 400                                             struct thermal_zone_device *tz);
 401 #else
 402 static inline struct thermal_zone_device *
 403 thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
 404                                 const struct thermal_zone_of_device_ops *ops)
 405 {
 406         return ERR_PTR(-ENODEV);
 407 }
 408
 409 static inline
 410 void thermal_zone_of_sensor_unregister(struct device *dev,
 411                                        struct thermal_zone_device *tz)
 412 {
 413 }
 414
 415 static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
 416                 struct device *dev, int id, void *data,
 417                 const struct thermal_zone_of_device_ops *ops)
 418 {
 419         return ERR_PTR(-ENODEV);
 420 }
 421
 422 static inline
 423 void devm_thermal_zone_of_sensor_unregister(struct device *dev,
 424                                             struct thermal_zone_device *tz)
 425 {
 426 }
 427
 428 #endif
 429
 430 #if IS_ENABLED(CONFIG_THERMAL)
 431 static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 432 {
 433         return cdev->ops->get_requested_power && cdev->ops->state2power &&
 434                 cdev->ops->power2state;
 435 }
 436
 437 int power_actor_get_max_power(struct thermal_cooling_device *,
 438                               struct thermal_zone_device *tz, u32 *max_power);
 439 int power_actor_get_min_power(struct thermal_cooling_device *,
 440                               struct thermal_zone_device *tz, u32 *min_power);
 441 int power_actor_set_power(struct thermal_cooling_device *,
 442                           struct thermal_instance *, u32);
 443 struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
 444                 void *, struct thermal_zone_device_ops *,
 445                 struct thermal_zone_params *, int, int);
 446 void thermal_zone_device_unregister(struct thermal_zone_device *);
 447
 448 int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
 449                                      struct thermal_cooling_device *,
 450                                      unsigned long, unsigned long,
 451                                      unsigned int);
 452 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
 453                                        struct thermal_cooling_device *);
 454 void thermal_zone_device_update(struct thermal_zone_device *,
 455                                 enum thermal_notify_event);
 456 void thermal_zone_set_trips(struct thermal_zone_device *);
 457
 458 struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
 459                 const struct thermal_cooling_device_ops *);
 460 struct thermal_cooling_device *
 461 thermal_of_cooling_device_register(struct device_node *np, char *, void *,
 462                                    const struct thermal_cooling_device_ops *);
 463 void thermal_cooling_device_unregister(struct thermal_cooling_device *);
 464 struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
 465 int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
 466 int thermal_zone_get_slope(struct thermal_zone_device *tz);
 467 int thermal_zone_get_offset(struct thermal_zone_device *tz);
 468
 469 int get_tz_trend(struct thermal_zone_device *, int);
 470 struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
 471                 struct thermal_cooling_device *, int);
 472 void thermal_cdev_update(struct thermal_cooling_device *);
 473 void thermal_notify_framework(struct thermal_zone_device *, int);
 474 #else
 475 static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 476 { return false; }
 477 static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev,
 478                               struct thermal_zone_device *tz, u32 *max_power)
 479 { return 0; }
 480 static inline int power_actor_get_min_power(struct thermal_cooling_device *cdev,
 481                                             struct thermal_zone_device *tz,
 482                                             u32 *min_power)
 483 { return -ENODEV; }
 484 static inline int power_actor_set_power(struct thermal_cooling_device *cdev,
 485                           struct thermal_instance *tz, u32 power)
 486 { return 0; }
 487 static inline struct thermal_zone_device *thermal_zone_device_register(
 488         const char *type, int trips, int mask, void *devdata,
 489         struct thermal_zone_device_ops *ops,
 490         const struct thermal_zone_params *tzp,
 491         int passive_delay, int polling_delay)
 492 { return ERR_PTR(-ENODEV); }
 493 static inline void thermal_zone_device_unregister(
 494         struct thermal_zone_device *tz)
 495 { }
 496 static inline int thermal_zone_bind_cooling_device(
 497         struct thermal_zone_device *tz, int trip,
 498         struct thermal_cooling_device *cdev,
 499         unsigned long upper, unsigned long lower,
 500         unsigned int weight)
 501 { return -ENODEV; }
 502 static inline int thermal_zone_unbind_cooling_device(
 503         struct thermal_zone_device *tz, int trip,
 504         struct thermal_cooling_device *cdev)
 505 { return -ENODEV; }
 506 static inline void thermal_zone_device_update(struct thermal_zone_device *tz,
 507                                               enum thermal_notify_event event)
 508 { }
 509 static inline void thermal_zone_set_trips(struct thermal_zone_device *tz)
 510 { }
 511 static inline struct thermal_cooling_device *
 512 thermal_cooling_device_register(char *type, void *devdata,
 513         const struct thermal_cooling_device_ops *ops)
 514 { return ERR_PTR(-ENODEV); }
 515 static inline struct thermal_cooling_device *
 516 thermal_of_cooling_device_register(struct device_node *np,
 517         char *type, void *devdata, const struct thermal_cooling_device_ops *ops)
 518 { return ERR_PTR(-ENODEV); }
 519 static inline void thermal_cooling_device_unregister(
 520         struct thermal_cooling_device *cdev)
 521 { }
 522 static inline struct thermal_zone_device *thermal_zone_get_zone_by_name(
 523                 const char *name)
 524 { return ERR_PTR(-ENODEV); }
 525 static inline int thermal_zone_get_temp(
 526                 struct thermal_zone_device *tz, int *temp)
 527 { return -ENODEV; }
 528 static inline int thermal_zone_get_slope(
 529                 struct thermal_zone_device *tz)
 530 { return -ENODEV; }
 531 static inline int thermal_zone_get_offset(
 532                 struct thermal_zone_device *tz)
 533 { return -ENODEV; }
 534 static inline int get_tz_trend(struct thermal_zone_device *tz, int trip)
 535 { return -ENODEV; }
 536 static inline struct thermal_instance *
 537 get_thermal_instance(struct thermal_zone_device *tz,
 538         struct thermal_cooling_device *cdev, int trip)
 539 { return ERR_PTR(-ENODEV); }
 540 static inline void thermal_cdev_update(struct thermal_cooling_device *cdev)
 541 { }
 542 static inline void thermal_notify_framework(struct thermal_zone_device *tz,
 543         int trip)
 544 { }
 545 #endif /* CONFIG_THERMAL */
 546
 547 #if defined(CONFIG_NET) && IS_ENABLED(CONFIG_THERMAL)
 548 extern int thermal_generate_netlink_event(struct thermal_zone_device *tz,
 549                                                 enum events event);
 550 #else
 551 static inline int thermal_generate_netlink_event(struct thermal_zone_device *tz,
 552                                                 enum events event)
 553 {
 554         return 0;
 555 }
 556 #endif
 557
 558 #endif /* __THERMAL_H__ */