LXR linux/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
  72struct thermal_zone_device;
  73struct thermal_cooling_device;
  74struct thermal_instance;
  75
  76enum thermal_device_mode {
  77        THERMAL_DEVICE_DISABLED = 0,
  78        THERMAL_DEVICE_ENABLED,
  79};
  80
  81enum thermal_trip_type {
  82        THERMAL_TRIP_ACTIVE = 0,
  83        THERMAL_TRIP_PASSIVE,
  84        THERMAL_TRIP_HOT,
  85        THERMAL_TRIP_CRITICAL,
  86};
  87
  88enum 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 */
  97enum 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
 107struct 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
 132struct 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
 144struct 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
 157struct 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 */
 204struct 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 */
 249struct 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 */
 258struct 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 */
 293struct 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
 345struct 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 */
 366struct 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
 382struct 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
 391struct thermal_zone_device *
 392thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
 393                                const struct thermal_zone_of_device_ops *ops);
 394void thermal_zone_of_sensor_unregister(struct device *dev,
 395                                       struct thermal_zone_device *tz);
 396struct 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);
 399void devm_thermal_zone_of_sensor_unregister(struct device *dev,
 400                                            struct thermal_zone_device *tz);
 401#else
 402static inline struct thermal_zone_device *
 403thermal_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
 409static inline
 410void thermal_zone_of_sensor_unregister(struct device *dev,
 411                                       struct thermal_zone_device *tz)
 412{
 413}
 414
 415static 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
 422static inline
 423void 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)
 431static 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
 437int power_actor_get_max_power(struct thermal_cooling_device *,
 438                              struct thermal_zone_device *tz, u32 *max_power);
 439int power_actor_get_min_power(struct thermal_cooling_device *,
 440                              struct thermal_zone_device *tz, u32 *min_power);
 441int power_actor_set_power(struct thermal_cooling_device *,
 442                          struct thermal_instance *, u32);
 443struct 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);
 446void thermal_zone_device_unregister(struct thermal_zone_device *);
 447
 448int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
 449                                     struct thermal_cooling_device *,
 450                                     unsigned long, unsigned long,
 451                                     unsigned int);
 452int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
 453                                       struct thermal_cooling_device *);
 454void thermal_zone_device_update(struct thermal_zone_device *,
 455                                enum thermal_notify_event);
 456void thermal_zone_set_trips(struct thermal_zone_device *);
 457
 458struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
 459                const struct thermal_cooling_device_ops *);
 460struct thermal_cooling_device *
 461thermal_of_cooling_device_register(struct device_node *np, char *, void *,
 462                                   const struct thermal_cooling_device_ops *);
 463void thermal_cooling_device_unregister(struct thermal_cooling_device *);
 464struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
 465int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
 466int thermal_zone_get_slope(struct thermal_zone_device *tz);
 467int thermal_zone_get_offset(struct thermal_zone_device *tz);
 468
 469int get_tz_trend(struct thermal_zone_device *, int);
 470struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
 471                struct thermal_cooling_device *, int);
 472void thermal_cdev_update(struct thermal_cooling_device *);
 473void thermal_notify_framework(struct thermal_zone_device *, int);
 474#else
 475static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
 476{ return false; }
 477static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev,
 478                              struct thermal_zone_device *tz, u32 *max_power)
 479{ return 0; }
 480static 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; }
 484static inline int power_actor_set_power(struct thermal_cooling_device *cdev,
 485                          struct thermal_instance *tz, u32 power)
 486{ return 0; }
 487static 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); }
 493static inline void thermal_zone_device_unregister(
 494        struct thermal_zone_device *tz)
 495{ }
 496static 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; }
 502static inline int thermal_zone_unbind_cooling_device(
 503        struct thermal_zone_device *tz, int trip,
 504        struct thermal_cooling_device *cdev)
 505{ return -ENODEV; }
 506static inline void thermal_zone_device_update(struct thermal_zone_device *tz,
 507                                              enum thermal_notify_event event)
 508{ }
 509static inline void thermal_zone_set_trips(struct thermal_zone_device *tz)
 510{ }
 511static inline struct thermal_cooling_device *
 512thermal_cooling_device_register(char *type, void *devdata,
 513        const struct thermal_cooling_device_ops *ops)
 514{ return ERR_PTR(-ENODEV); }
 515static inline struct thermal_cooling_device *
 516thermal_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); }
 519static inline void thermal_cooling_device_unregister(
 520        struct thermal_cooling_device *cdev)
 521{ }
 522static inline struct thermal_zone_device *thermal_zone_get_zone_by_name(
 523                const char *name)
 524{ return ERR_PTR(-ENODEV); }
 525static inline int thermal_zone_get_temp(
 526                struct thermal_zone_device *tz, int *temp)
 527{ return -ENODEV; }
 528static inline int thermal_zone_get_slope(
 529                struct thermal_zone_device *tz)
 530{ return -ENODEV; }
 531static inline int thermal_zone_get_offset(
 532                struct thermal_zone_device *tz)
 533{ return -ENODEV; }
 534static inline int get_tz_trend(struct thermal_zone_device *tz, int trip)
 535{ return -ENODEV; }
 536static inline struct thermal_instance *
 537get_thermal_instance(struct thermal_zone_device *tz,
 538        struct thermal_cooling_device *cdev, int trip)
 539{ return ERR_PTR(-ENODEV); }
 540static inline void thermal_cdev_update(struct thermal_cooling_device *cdev)
 541{ }
 542static 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)
 548extern int thermal_generate_netlink_event(struct thermal_zone_device *tz,
 549                                                enum events event);
 550#else
 551static 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__ */
 559