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1 : : /* SPDX-License-Identifier: GPL-2.0 */
2 : : /*
3 : : * thermal.h ($Revision: 0 $)
4 : : *
5 : : * Copyright (C) 2008 Intel Corp
6 : : * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
7 : : * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
8 : : */
9 : :
10 : : #ifndef __THERMAL_H__
11 : : #define __THERMAL_H__
12 : :
13 : : #include <linux/of.h>
14 : : #include <linux/idr.h>
15 : : #include <linux/device.h>
16 : : #include <linux/sysfs.h>
17 : : #include <linux/workqueue.h>
18 : : #include <uapi/linux/thermal.h>
19 : :
20 : : #define THERMAL_TRIPS_NONE -1
21 : : #define THERMAL_MAX_TRIPS 12
22 : :
23 : : /* invalid cooling state */
24 : : #define THERMAL_CSTATE_INVALID -1UL
25 : :
26 : : /* No upper/lower limit requirement */
27 : : #define THERMAL_NO_LIMIT ((u32)~0)
28 : :
29 : : /* Default weight of a bound cooling device */
30 : : #define THERMAL_WEIGHT_DEFAULT 0
31 : :
32 : : /* use value, which < 0K, to indicate an invalid/uninitialized temperature */
33 : : #define THERMAL_TEMP_INVALID -274000
34 : :
35 : : /* Unit conversion macros */
36 : : #define DECI_KELVIN_TO_CELSIUS(t) ({ \
37 : : long _t = (t); \
38 : : ((_t-2732 >= 0) ? (_t-2732+5)/10 : (_t-2732-5)/10); \
39 : : })
40 : : #define CELSIUS_TO_DECI_KELVIN(t) ((t)*10+2732)
41 : : #define DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, off) (((t) - (off)) * 100)
42 : : #define DECI_KELVIN_TO_MILLICELSIUS(t) DECI_KELVIN_TO_MILLICELSIUS_WITH_OFFSET(t, 2732)
43 : : #define MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, off) (((t) / 100) + (off))
44 : : #define MILLICELSIUS_TO_DECI_KELVIN(t) MILLICELSIUS_TO_DECI_KELVIN_WITH_OFFSET(t, 2732)
45 : :
46 : : /* Default Thermal Governor */
47 : : #if defined(CONFIG_THERMAL_DEFAULT_GOV_STEP_WISE)
48 : : #define DEFAULT_THERMAL_GOVERNOR "step_wise"
49 : : #elif defined(CONFIG_THERMAL_DEFAULT_GOV_FAIR_SHARE)
50 : : #define DEFAULT_THERMAL_GOVERNOR "fair_share"
51 : : #elif defined(CONFIG_THERMAL_DEFAULT_GOV_USER_SPACE)
52 : : #define DEFAULT_THERMAL_GOVERNOR "user_space"
53 : : #elif defined(CONFIG_THERMAL_DEFAULT_GOV_POWER_ALLOCATOR)
54 : : #define DEFAULT_THERMAL_GOVERNOR "power_allocator"
55 : : #endif
56 : :
57 : : struct thermal_zone_device;
58 : : struct thermal_cooling_device;
59 : : struct thermal_instance;
60 : :
61 : : enum thermal_device_mode {
62 : : THERMAL_DEVICE_DISABLED = 0,
63 : : THERMAL_DEVICE_ENABLED,
64 : : };
65 : :
66 : : enum thermal_trip_type {
67 : : THERMAL_TRIP_ACTIVE = 0,
68 : : THERMAL_TRIP_PASSIVE,
69 : : THERMAL_TRIP_HOT,
70 : : THERMAL_TRIP_CRITICAL,
71 : : };
72 : :
73 : : enum thermal_trend {
74 : : THERMAL_TREND_STABLE, /* temperature is stable */
75 : : THERMAL_TREND_RAISING, /* temperature is raising */
76 : : THERMAL_TREND_DROPPING, /* temperature is dropping */
77 : : THERMAL_TREND_RAISE_FULL, /* apply highest cooling action */
78 : : THERMAL_TREND_DROP_FULL, /* apply lowest cooling action */
79 : : };
80 : :
81 : : /* Thermal notification reason */
82 : : enum thermal_notify_event {
83 : : THERMAL_EVENT_UNSPECIFIED, /* Unspecified event */
84 : : THERMAL_EVENT_TEMP_SAMPLE, /* New Temperature sample */
85 : : THERMAL_TRIP_VIOLATED, /* TRIP Point violation */
86 : : THERMAL_TRIP_CHANGED, /* TRIP Point temperature changed */
87 : : THERMAL_DEVICE_DOWN, /* Thermal device is down */
88 : : THERMAL_DEVICE_UP, /* Thermal device is up after a down event */
89 : : THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */
90 : : THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */
91 : : };
92 : :
93 : : struct thermal_zone_device_ops {
94 : : int (*bind) (struct thermal_zone_device *,
95 : : struct thermal_cooling_device *);
96 : : int (*unbind) (struct thermal_zone_device *,
97 : : struct thermal_cooling_device *);
98 : : int (*get_temp) (struct thermal_zone_device *, int *);
99 : : int (*set_trips) (struct thermal_zone_device *, int, int);
100 : : int (*get_mode) (struct thermal_zone_device *,
101 : : enum thermal_device_mode *);
102 : : int (*set_mode) (struct thermal_zone_device *,
103 : : enum thermal_device_mode);
104 : : int (*get_trip_type) (struct thermal_zone_device *, int,
105 : : enum thermal_trip_type *);
106 : : int (*get_trip_temp) (struct thermal_zone_device *, int, int *);
107 : : int (*set_trip_temp) (struct thermal_zone_device *, int, int);
108 : : int (*get_trip_hyst) (struct thermal_zone_device *, int, int *);
109 : : int (*set_trip_hyst) (struct thermal_zone_device *, int, int);
110 : : int (*get_crit_temp) (struct thermal_zone_device *, int *);
111 : : int (*set_emul_temp) (struct thermal_zone_device *, int);
112 : : int (*get_trend) (struct thermal_zone_device *, int,
113 : : enum thermal_trend *);
114 : : int (*notify) (struct thermal_zone_device *, int,
115 : : enum thermal_trip_type);
116 : : };
117 : :
118 : : struct thermal_cooling_device_ops {
119 : : int (*get_max_state) (struct thermal_cooling_device *, unsigned long *);
120 : : int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *);
121 : : int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
122 : : int (*get_requested_power)(struct thermal_cooling_device *,
123 : : struct thermal_zone_device *, u32 *);
124 : : int (*state2power)(struct thermal_cooling_device *,
125 : : struct thermal_zone_device *, unsigned long, u32 *);
126 : : int (*power2state)(struct thermal_cooling_device *,
127 : : struct thermal_zone_device *, u32, unsigned long *);
128 : : };
129 : :
130 : : struct thermal_cooling_device {
131 : : int id;
132 : : char type[THERMAL_NAME_LENGTH];
133 : : struct device device;
134 : : struct device_node *np;
135 : : void *devdata;
136 : : void *stats;
137 : : const struct thermal_cooling_device_ops *ops;
138 : : bool updated; /* true if the cooling device does not need update */
139 : : struct mutex lock; /* protect thermal_instances list */
140 : : struct list_head thermal_instances;
141 : : struct list_head node;
142 : : };
143 : :
144 : : struct thermal_attr {
145 : : struct device_attribute attr;
146 : : char name[THERMAL_NAME_LENGTH];
147 : : };
148 : :
149 : : /**
150 : : * struct thermal_zone_device - structure for a thermal zone
151 : : * @id: unique id number for each thermal zone
152 : : * @type: the thermal zone device type
153 : : * @device: &struct device for this thermal zone
154 : : * @trip_temp_attrs: attributes for trip points for sysfs: trip temperature
155 : : * @trip_type_attrs: attributes for trip points for sysfs: trip type
156 : : * @trip_hyst_attrs: attributes for trip points for sysfs: trip hysteresis
157 : : * @devdata: private pointer for device private data
158 : : * @trips: number of trip points the thermal zone supports
159 : : * @trips_disabled; bitmap for disabled trips
160 : : * @passive_delay: number of milliseconds to wait between polls when
161 : : * performing passive cooling.
162 : : * @polling_delay: number of milliseconds to wait between polls when
163 : : * checking whether trip points have been crossed (0 for
164 : : * interrupt driven systems)
165 : : * @temperature: current temperature. This is only for core code,
166 : : * drivers should use thermal_zone_get_temp() to get the
167 : : * current temperature
168 : : * @last_temperature: previous temperature read
169 : : * @emul_temperature: emulated temperature when using CONFIG_THERMAL_EMULATION
170 : : * @passive: 1 if you've crossed a passive trip point, 0 otherwise.
171 : : * @prev_low_trip: the low current temperature if you've crossed a passive
172 : : trip point.
173 : : * @prev_high_trip: the above current temperature if you've crossed a
174 : : passive trip point.
175 : : * @forced_passive: If > 0, temperature at which to switch on all ACPI
176 : : * processor cooling devices. Currently only used by the
177 : : * step-wise governor.
178 : : * @need_update: if equals 1, thermal_zone_device_update needs to be invoked.
179 : : * @ops: operations this &thermal_zone_device supports
180 : : * @tzp: thermal zone parameters
181 : : * @governor: pointer to the governor for this thermal zone
182 : : * @governor_data: private pointer for governor data
183 : : * @thermal_instances: list of &struct thermal_instance of this thermal zone
184 : : * @ida: &struct ida to generate unique id for this zone's cooling
185 : : * devices
186 : : * @lock: lock to protect thermal_instances list
187 : : * @node: node in thermal_tz_list (in thermal_core.c)
188 : : * @poll_queue: delayed work for polling
189 : : * @notify_event: Last notification event
190 : : */
191 : : struct thermal_zone_device {
192 : : int id;
193 : : char type[THERMAL_NAME_LENGTH];
194 : : struct device device;
195 : : struct attribute_group trips_attribute_group;
196 : : struct thermal_attr *trip_temp_attrs;
197 : : struct thermal_attr *trip_type_attrs;
198 : : struct thermal_attr *trip_hyst_attrs;
199 : : void *devdata;
200 : : int trips;
201 : : unsigned long trips_disabled; /* bitmap for disabled trips */
202 : : int passive_delay;
203 : : int polling_delay;
204 : : int temperature;
205 : : int last_temperature;
206 : : int emul_temperature;
207 : : int passive;
208 : : int prev_low_trip;
209 : : int prev_high_trip;
210 : : unsigned int forced_passive;
211 : : atomic_t need_update;
212 : : struct thermal_zone_device_ops *ops;
213 : : struct thermal_zone_params *tzp;
214 : : struct thermal_governor *governor;
215 : : void *governor_data;
216 : : struct list_head thermal_instances;
217 : : struct ida ida;
218 : : struct mutex lock;
219 : : struct list_head node;
220 : : struct delayed_work poll_queue;
221 : : enum thermal_notify_event notify_event;
222 : : };
223 : :
224 : : /**
225 : : * struct thermal_governor - structure that holds thermal governor information
226 : : * @name: name of the governor
227 : : * @bind_to_tz: callback called when binding to a thermal zone. If it
228 : : * returns 0, the governor is bound to the thermal zone,
229 : : * otherwise it fails.
230 : : * @unbind_from_tz: callback called when a governor is unbound from a
231 : : * thermal zone.
232 : : * @throttle: callback called for every trip point even if temperature is
233 : : * below the trip point temperature
234 : : * @governor_list: node in thermal_governor_list (in thermal_core.c)
235 : : */
236 : : struct thermal_governor {
237 : : char name[THERMAL_NAME_LENGTH];
238 : : int (*bind_to_tz)(struct thermal_zone_device *tz);
239 : : void (*unbind_from_tz)(struct thermal_zone_device *tz);
240 : : int (*throttle)(struct thermal_zone_device *tz, int trip);
241 : : struct list_head governor_list;
242 : : };
243 : :
244 : : /* Structure that holds binding parameters for a zone */
245 : : struct thermal_bind_params {
246 : : struct thermal_cooling_device *cdev;
247 : :
248 : : /*
249 : : * This is a measure of 'how effectively these devices can
250 : : * cool 'this' thermal zone. It shall be determined by
251 : : * platform characterization. This value is relative to the
252 : : * rest of the weights so a cooling device whose weight is
253 : : * double that of another cooling device is twice as
254 : : * effective. See Documentation/driver-api/thermal/sysfs-api.rst for more
255 : : * information.
256 : : */
257 : : int weight;
258 : :
259 : : /*
260 : : * This is a bit mask that gives the binding relation between this
261 : : * thermal zone and cdev, for a particular trip point.
262 : : * See Documentation/driver-api/thermal/sysfs-api.rst for more information.
263 : : */
264 : : int trip_mask;
265 : :
266 : : /*
267 : : * This is an array of cooling state limits. Must have exactly
268 : : * 2 * thermal_zone.number_of_trip_points. It is an array consisting
269 : : * of tuples <lower-state upper-state> of state limits. Each trip
270 : : * will be associated with one state limit tuple when binding.
271 : : * A NULL pointer means <THERMAL_NO_LIMITS THERMAL_NO_LIMITS>
272 : : * on all trips.
273 : : */
274 : : unsigned long *binding_limits;
275 : : int (*match) (struct thermal_zone_device *tz,
276 : : struct thermal_cooling_device *cdev);
277 : : };
278 : :
279 : : /* Structure to define Thermal Zone parameters */
280 : : struct thermal_zone_params {
281 : : char governor_name[THERMAL_NAME_LENGTH];
282 : :
283 : : /*
284 : : * a boolean to indicate if the thermal to hwmon sysfs interface
285 : : * is required. when no_hwmon == false, a hwmon sysfs interface
286 : : * will be created. when no_hwmon == true, nothing will be done
287 : : */
288 : : bool no_hwmon;
289 : :
290 : : int num_tbps; /* Number of tbp entries */
291 : : struct thermal_bind_params *tbp;
292 : :
293 : : /*
294 : : * Sustainable power (heat) that this thermal zone can dissipate in
295 : : * mW
296 : : */
297 : : u32 sustainable_power;
298 : :
299 : : /*
300 : : * Proportional parameter of the PID controller when
301 : : * overshooting (i.e., when temperature is below the target)
302 : : */
303 : : s32 k_po;
304 : :
305 : : /*
306 : : * Proportional parameter of the PID controller when
307 : : * undershooting
308 : : */
309 : : s32 k_pu;
310 : :
311 : : /* Integral parameter of the PID controller */
312 : : s32 k_i;
313 : :
314 : : /* Derivative parameter of the PID controller */
315 : : s32 k_d;
316 : :
317 : : /* threshold below which the error is no longer accumulated */
318 : : s32 integral_cutoff;
319 : :
320 : : /*
321 : : * @slope: slope of a linear temperature adjustment curve.
322 : : * Used by thermal zone drivers.
323 : : */
324 : : int slope;
325 : : /*
326 : : * @offset: offset of a linear temperature adjustment curve.
327 : : * Used by thermal zone drivers (default 0).
328 : : */
329 : : int offset;
330 : : };
331 : :
332 : : struct thermal_genl_event {
333 : : u32 orig;
334 : : enum events event;
335 : : };
336 : :
337 : : /**
338 : : * struct thermal_zone_of_device_ops - scallbacks for handling DT based zones
339 : : *
340 : : * Mandatory:
341 : : * @get_temp: a pointer to a function that reads the sensor temperature.
342 : : *
343 : : * Optional:
344 : : * @get_trend: a pointer to a function that reads the sensor temperature trend.
345 : : * @set_trips: a pointer to a function that sets a temperature window. When
346 : : * this window is left the driver must inform the thermal core via
347 : : * thermal_zone_device_update.
348 : : * @set_emul_temp: a pointer to a function that sets sensor emulated
349 : : * temperature.
350 : : * @set_trip_temp: a pointer to a function that sets the trip temperature on
351 : : * hardware.
352 : : */
353 : : struct thermal_zone_of_device_ops {
354 : : int (*get_temp)(void *, int *);
355 : : int (*get_trend)(void *, int, enum thermal_trend *);
356 : : int (*set_trips)(void *, int, int);
357 : : int (*set_emul_temp)(void *, int);
358 : : int (*set_trip_temp)(void *, int, int);
359 : : };
360 : :
361 : : /**
362 : : * struct thermal_trip - representation of a point in temperature domain
363 : : * @np: pointer to struct device_node that this trip point was created from
364 : : * @temperature: temperature value in miliCelsius
365 : : * @hysteresis: relative hysteresis in miliCelsius
366 : : * @type: trip point type
367 : : */
368 : :
369 : : struct thermal_trip {
370 : : struct device_node *np;
371 : : int temperature;
372 : : int hysteresis;
373 : : enum thermal_trip_type type;
374 : : };
375 : :
376 : : /* Function declarations */
377 : : #ifdef CONFIG_THERMAL_OF
378 : : struct thermal_zone_device *
379 : : thermal_zone_of_sensor_register(struct device *dev, int id, void *data,
380 : : const struct thermal_zone_of_device_ops *ops);
381 : : void thermal_zone_of_sensor_unregister(struct device *dev,
382 : : struct thermal_zone_device *tz);
383 : : struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
384 : : struct device *dev, int id, void *data,
385 : : const struct thermal_zone_of_device_ops *ops);
386 : : void devm_thermal_zone_of_sensor_unregister(struct device *dev,
387 : : struct thermal_zone_device *tz);
388 : : #else
389 : : static inline 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 : : {
393 : : return ERR_PTR(-ENODEV);
394 : : }
395 : :
396 : : static inline
397 : : void thermal_zone_of_sensor_unregister(struct device *dev,
398 : : struct thermal_zone_device *tz)
399 : : {
400 : : }
401 : :
402 : : static inline struct thermal_zone_device *devm_thermal_zone_of_sensor_register(
403 : : 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 devm_thermal_zone_of_sensor_unregister(struct device *dev,
411 : : struct thermal_zone_device *tz)
412 : : {
413 : : }
414 : :
415 : : #endif
416 : :
417 : : #if IS_ENABLED(CONFIG_THERMAL)
418 : : static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
419 : : {
420 : 0 : return cdev->ops->get_requested_power && cdev->ops->state2power &&
421 : 0 : cdev->ops->power2state;
422 : : }
423 : :
424 : : int power_actor_get_max_power(struct thermal_cooling_device *,
425 : : struct thermal_zone_device *tz, u32 *max_power);
426 : : int power_actor_get_min_power(struct thermal_cooling_device *,
427 : : struct thermal_zone_device *tz, u32 *min_power);
428 : : int power_actor_set_power(struct thermal_cooling_device *,
429 : : struct thermal_instance *, u32);
430 : : struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
431 : : void *, struct thermal_zone_device_ops *,
432 : : struct thermal_zone_params *, int, int);
433 : : void thermal_zone_device_unregister(struct thermal_zone_device *);
434 : :
435 : : int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
436 : : struct thermal_cooling_device *,
437 : : unsigned long, unsigned long,
438 : : unsigned int);
439 : : int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
440 : : struct thermal_cooling_device *);
441 : : void thermal_zone_device_update(struct thermal_zone_device *,
442 : : enum thermal_notify_event);
443 : : void thermal_zone_set_trips(struct thermal_zone_device *);
444 : :
445 : : struct thermal_cooling_device *thermal_cooling_device_register(const char *,
446 : : void *, const struct thermal_cooling_device_ops *);
447 : : struct thermal_cooling_device *
448 : : thermal_of_cooling_device_register(struct device_node *np, const char *, void *,
449 : : const struct thermal_cooling_device_ops *);
450 : : struct thermal_cooling_device *
451 : : devm_thermal_of_cooling_device_register(struct device *dev,
452 : : struct device_node *np,
453 : : char *type, void *devdata,
454 : : const struct thermal_cooling_device_ops *ops);
455 : : void thermal_cooling_device_unregister(struct thermal_cooling_device *);
456 : : struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
457 : : int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
458 : : int thermal_zone_get_slope(struct thermal_zone_device *tz);
459 : : int thermal_zone_get_offset(struct thermal_zone_device *tz);
460 : :
461 : : int get_tz_trend(struct thermal_zone_device *, int);
462 : : struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
463 : : struct thermal_cooling_device *, int);
464 : : void thermal_cdev_update(struct thermal_cooling_device *);
465 : : void thermal_notify_framework(struct thermal_zone_device *, int);
466 : : #else
467 : : static inline bool cdev_is_power_actor(struct thermal_cooling_device *cdev)
468 : : { return false; }
469 : : static inline int power_actor_get_max_power(struct thermal_cooling_device *cdev,
470 : : struct thermal_zone_device *tz, u32 *max_power)
471 : : { return 0; }
472 : : static inline int power_actor_get_min_power(struct thermal_cooling_device *cdev,
473 : : struct thermal_zone_device *tz,
474 : : u32 *min_power)
475 : : { return -ENODEV; }
476 : : static inline int power_actor_set_power(struct thermal_cooling_device *cdev,
477 : : struct thermal_instance *tz, u32 power)
478 : : { return 0; }
479 : : static inline struct thermal_zone_device *thermal_zone_device_register(
480 : : const char *type, int trips, int mask, void *devdata,
481 : : struct thermal_zone_device_ops *ops,
482 : : struct thermal_zone_params *tzp,
483 : : int passive_delay, int polling_delay)
484 : : { return ERR_PTR(-ENODEV); }
485 : : static inline void thermal_zone_device_unregister(
486 : : struct thermal_zone_device *tz)
487 : : { }
488 : : static inline int thermal_zone_bind_cooling_device(
489 : : struct thermal_zone_device *tz, int trip,
490 : : struct thermal_cooling_device *cdev,
491 : : unsigned long upper, unsigned long lower,
492 : : unsigned int weight)
493 : : { return -ENODEV; }
494 : : static inline int thermal_zone_unbind_cooling_device(
495 : : struct thermal_zone_device *tz, int trip,
496 : : struct thermal_cooling_device *cdev)
497 : : { return -ENODEV; }
498 : : static inline void thermal_zone_device_update(struct thermal_zone_device *tz,
499 : : enum thermal_notify_event event)
500 : : { }
501 : : static inline void thermal_zone_set_trips(struct thermal_zone_device *tz)
502 : : { }
503 : : static inline struct thermal_cooling_device *
504 : : thermal_cooling_device_register(char *type, void *devdata,
505 : : const struct thermal_cooling_device_ops *ops)
506 : : { return ERR_PTR(-ENODEV); }
507 : : static inline struct thermal_cooling_device *
508 : : thermal_of_cooling_device_register(struct device_node *np,
509 : : char *type, void *devdata, const struct thermal_cooling_device_ops *ops)
510 : : { return ERR_PTR(-ENODEV); }
511 : : static inline struct thermal_cooling_device *
512 : : devm_thermal_of_cooling_device_register(struct device *dev,
513 : : struct device_node *np,
514 : : char *type, void *devdata,
515 : : const struct thermal_cooling_device_ops *ops)
516 : : {
517 : : return ERR_PTR(-ENODEV);
518 : : }
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__ */
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