Commit | Line | Data |
---|---|---|
7e3c0381 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
203d3d4a ZR |
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> | |
203d3d4a ZR |
8 | */ |
9 | ||
10 | #ifndef __THERMAL_H__ | |
11 | #define __THERMAL_H__ | |
12 | ||
a116b5d4 | 13 | #include <linux/of.h> |
203d3d4a ZR |
14 | #include <linux/idr.h> |
15 | #include <linux/device.h> | |
4d0fe749 | 16 | #include <linux/sysfs.h> |
b1569e99 | 17 | #include <linux/workqueue.h> |
af6c9f16 | 18 | #include <uapi/linux/thermal.h> |
203d3d4a | 19 | |
57df8106 ZR |
20 | /* invalid cooling state */ |
21 | #define THERMAL_CSTATE_INVALID -1UL | |
22 | ||
23064088 | 23 | /* No upper/lower limit requirement */ |
a940cb34 | 24 | #define THERMAL_NO_LIMIT ((u32)~0) |
23064088 | 25 | |
6cd9e9f6 KS |
26 | /* Default weight of a bound cooling device */ |
27 | #define THERMAL_WEIGHT_DEFAULT 0 | |
28 | ||
bb431ba2 ZR |
29 | /* use value, which < 0K, to indicate an invalid/uninitialized temperature */ |
30 | #define THERMAL_TEMP_INVALID -274000 | |
31 | ||
203d3d4a ZR |
32 | struct thermal_zone_device; |
33 | struct thermal_cooling_device; | |
35b11d2e | 34 | struct thermal_instance; |
c68df440 | 35 | struct thermal_attr; |
203d3d4a | 36 | |
601f3d42 ZR |
37 | enum thermal_trend { |
38 | THERMAL_TREND_STABLE, /* temperature is stable */ | |
39 | THERMAL_TREND_RAISING, /* temperature is raising */ | |
40 | THERMAL_TREND_DROPPING, /* temperature is dropping */ | |
41 | }; | |
42 | ||
0e70f466 SP |
43 | /* Thermal notification reason */ |
44 | enum thermal_notify_event { | |
45 | THERMAL_EVENT_UNSPECIFIED, /* Unspecified event */ | |
46 | THERMAL_EVENT_TEMP_SAMPLE, /* New Temperature sample */ | |
47 | THERMAL_TRIP_VIOLATED, /* TRIP Point violation */ | |
48 | THERMAL_TRIP_CHANGED, /* TRIP Point temperature changed */ | |
49 | THERMAL_DEVICE_DOWN, /* Thermal device is down */ | |
50 | THERMAL_DEVICE_UP, /* Thermal device is up after a down event */ | |
51 | THERMAL_DEVICE_POWER_CAPABILITY_CHANGED, /* power capability changed */ | |
38e44da5 | 52 | THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */ |
88052319 | 53 | THERMAL_EVENT_KEEP_ALIVE, /* Request for user space handler to respond */ |
0e70f466 SP |
54 | }; |
55 | ||
203d3d4a ZR |
56 | struct thermal_zone_device_ops { |
57 | int (*bind) (struct thermal_zone_device *, | |
58 | struct thermal_cooling_device *); | |
59 | int (*unbind) (struct thermal_zone_device *, | |
60 | struct thermal_cooling_device *); | |
17e8351a | 61 | int (*get_temp) (struct thermal_zone_device *, int *); |
060c034a | 62 | int (*set_trips) (struct thermal_zone_device *, int, int); |
f5e50bf4 | 63 | int (*change_mode) (struct thermal_zone_device *, |
6503e5df MG |
64 | enum thermal_device_mode); |
65 | int (*get_trip_type) (struct thermal_zone_device *, int, | |
66 | enum thermal_trip_type *); | |
17e8351a SH |
67 | int (*get_trip_temp) (struct thermal_zone_device *, int, int *); |
68 | int (*set_trip_temp) (struct thermal_zone_device *, int, int); | |
69 | int (*get_trip_hyst) (struct thermal_zone_device *, int, int *); | |
70 | int (*set_trip_hyst) (struct thermal_zone_device *, int, int); | |
71 | int (*get_crit_temp) (struct thermal_zone_device *, int *); | |
72 | int (*set_emul_temp) (struct thermal_zone_device *, int); | |
601f3d42 ZR |
73 | int (*get_trend) (struct thermal_zone_device *, int, |
74 | enum thermal_trend *); | |
d7203eed DL |
75 | void (*hot)(struct thermal_zone_device *); |
76 | void (*critical)(struct thermal_zone_device *); | |
203d3d4a ZR |
77 | }; |
78 | ||
646274dd DL |
79 | /** |
80 | * struct thermal_trip - representation of a point in temperature domain | |
81 | * @temperature: temperature value in miliCelsius | |
82 | * @hysteresis: relative hysteresis in miliCelsius | |
83 | * @type: trip point type | |
84 | */ | |
85 | struct thermal_trip { | |
86 | int temperature; | |
87 | int hysteresis; | |
88 | enum thermal_trip_type type; | |
89 | }; | |
90 | ||
203d3d4a | 91 | struct thermal_cooling_device_ops { |
6503e5df MG |
92 | int (*get_max_state) (struct thermal_cooling_device *, unsigned long *); |
93 | int (*get_cur_state) (struct thermal_cooling_device *, unsigned long *); | |
94 | int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); | |
ecd1d2a3 | 95 | int (*get_requested_power)(struct thermal_cooling_device *, u32 *); |
96 | int (*state2power)(struct thermal_cooling_device *, unsigned long, u32 *); | |
97 | int (*power2state)(struct thermal_cooling_device *, u32, unsigned long *); | |
203d3d4a ZR |
98 | }; |
99 | ||
203d3d4a ZR |
100 | struct thermal_cooling_device { |
101 | int id; | |
58483761 | 102 | char *type; |
c408b3d1 | 103 | unsigned long max_state; |
203d3d4a | 104 | struct device device; |
4e5e4705 | 105 | struct device_node *np; |
203d3d4a | 106 | void *devdata; |
8ea22951 | 107 | void *stats; |
5b275ce2 | 108 | const struct thermal_cooling_device_ops *ops; |
ce119f83 | 109 | bool updated; /* true if the cooling device does not need update */ |
f4a821ce | 110 | struct mutex lock; /* protect thermal_instances list */ |
b5e4ae62 | 111 | struct list_head thermal_instances; |
203d3d4a ZR |
112 | struct list_head node; |
113 | }; | |
114 | ||
c708a98f JM |
115 | /** |
116 | * struct thermal_zone_device - structure for a thermal zone | |
117 | * @id: unique id number for each thermal zone | |
118 | * @type: the thermal zone device type | |
119 | * @device: &struct device for this thermal zone | |
120 | * @trip_temp_attrs: attributes for trip points for sysfs: trip temperature | |
121 | * @trip_type_attrs: attributes for trip points for sysfs: trip type | |
122 | * @trip_hyst_attrs: attributes for trip points for sysfs: trip hysteresis | |
cbba1d71 | 123 | * @mode: current mode of this thermal zone |
c708a98f | 124 | * @devdata: private pointer for device private data |
fae11de5 | 125 | * @trips: an array of struct thermal_trip |
e5bfcd30 | 126 | * @num_trips: number of trip points the thermal zone supports |
81ad4276 | 127 | * @trips_disabled; bitmap for disabled trips |
17d399cd DL |
128 | * @passive_delay_jiffies: number of jiffies to wait between polls when |
129 | * performing passive cooling. | |
17d399cd DL |
130 | * @polling_delay_jiffies: number of jiffies to wait between polls when |
131 | * checking whether trip points have been crossed (0 for | |
132 | * interrupt driven systems) | |
c708a98f JM |
133 | * @temperature: current temperature. This is only for core code, |
134 | * drivers should use thermal_zone_get_temp() to get the | |
135 | * current temperature | |
136 | * @last_temperature: previous temperature read | |
137 | * @emul_temperature: emulated temperature when using CONFIG_THERMAL_EMULATION | |
138 | * @passive: 1 if you've crossed a passive trip point, 0 otherwise. | |
060c034a SH |
139 | * @prev_low_trip: the low current temperature if you've crossed a passive |
140 | trip point. | |
141 | * @prev_high_trip: the above current temperature if you've crossed a | |
142 | passive trip point. | |
4511f716 | 143 | * @need_update: if equals 1, thermal_zone_device_update needs to be invoked. |
c708a98f JM |
144 | * @ops: operations this &thermal_zone_device supports |
145 | * @tzp: thermal zone parameters | |
146 | * @governor: pointer to the governor for this thermal zone | |
e33df1d2 | 147 | * @governor_data: private pointer for governor data |
c708a98f | 148 | * @thermal_instances: list of &struct thermal_instance of this thermal zone |
b31ef828 | 149 | * @ida: &struct ida to generate unique id for this zone's cooling |
c708a98f JM |
150 | * devices |
151 | * @lock: lock to protect thermal_instances list | |
152 | * @node: node in thermal_tz_list (in thermal_core.c) | |
153 | * @poll_queue: delayed work for polling | |
0e70f466 | 154 | * @notify_event: Last notification event |
c708a98f | 155 | */ |
203d3d4a ZR |
156 | struct thermal_zone_device { |
157 | int id; | |
158 | char type[THERMAL_NAME_LENGTH]; | |
159 | struct device device; | |
4d0fe749 | 160 | struct attribute_group trips_attribute_group; |
c56f5c03 D |
161 | struct thermal_attr *trip_temp_attrs; |
162 | struct thermal_attr *trip_type_attrs; | |
27365a6c | 163 | struct thermal_attr *trip_hyst_attrs; |
cbba1d71 | 164 | enum thermal_device_mode mode; |
203d3d4a | 165 | void *devdata; |
fae11de5 | 166 | struct thermal_trip *trips; |
e5bfcd30 | 167 | int num_trips; |
81ad4276 | 168 | unsigned long trips_disabled; /* bitmap for disabled trips */ |
17d399cd DL |
169 | unsigned long passive_delay_jiffies; |
170 | unsigned long polling_delay_jiffies; | |
601f3d42 | 171 | int temperature; |
b1569e99 | 172 | int last_temperature; |
e6e238c3 | 173 | int emul_temperature; |
908b9fb7 | 174 | int passive; |
060c034a SH |
175 | int prev_low_trip; |
176 | int prev_high_trip; | |
4511f716 | 177 | atomic_t need_update; |
4e5e4705 | 178 | struct thermal_zone_device_ops *ops; |
6b775e87 | 179 | struct thermal_zone_params *tzp; |
a4a15485 | 180 | struct thermal_governor *governor; |
e33df1d2 | 181 | void *governor_data; |
2d374139 | 182 | struct list_head thermal_instances; |
b31ef828 | 183 | struct ida ida; |
c708a98f | 184 | struct mutex lock; |
203d3d4a | 185 | struct list_head node; |
b1569e99 | 186 | struct delayed_work poll_queue; |
0e70f466 | 187 | enum thermal_notify_event notify_event; |
203d3d4a | 188 | }; |
4cb18728 | 189 | |
c708a98f JM |
190 | /** |
191 | * struct thermal_governor - structure that holds thermal governor information | |
192 | * @name: name of the governor | |
e33df1d2 JM |
193 | * @bind_to_tz: callback called when binding to a thermal zone. If it |
194 | * returns 0, the governor is bound to the thermal zone, | |
195 | * otherwise it fails. | |
196 | * @unbind_from_tz: callback called when a governor is unbound from a | |
197 | * thermal zone. | |
c708a98f JM |
198 | * @throttle: callback called for every trip point even if temperature is |
199 | * below the trip point temperature | |
200 | * @governor_list: node in thermal_governor_list (in thermal_core.c) | |
201 | */ | |
a4a15485 D |
202 | struct thermal_governor { |
203 | char name[THERMAL_NAME_LENGTH]; | |
e33df1d2 JM |
204 | int (*bind_to_tz)(struct thermal_zone_device *tz); |
205 | void (*unbind_from_tz)(struct thermal_zone_device *tz); | |
a4a15485 D |
206 | int (*throttle)(struct thermal_zone_device *tz, int trip); |
207 | struct list_head governor_list; | |
a4a15485 D |
208 | }; |
209 | ||
ef873947 D |
210 | /* Structure to define Thermal Zone parameters */ |
211 | struct thermal_zone_params { | |
a4a15485 | 212 | char governor_name[THERMAL_NAME_LENGTH]; |
ccba4ffd EV |
213 | |
214 | /* | |
215 | * a boolean to indicate if the thermal to hwmon sysfs interface | |
216 | * is required. when no_hwmon == false, a hwmon sysfs interface | |
217 | * will be created. when no_hwmon == true, nothing will be done | |
218 | */ | |
219 | bool no_hwmon; | |
220 | ||
6b775e87 JM |
221 | /* |
222 | * Sustainable power (heat) that this thermal zone can dissipate in | |
223 | * mW | |
224 | */ | |
225 | u32 sustainable_power; | |
226 | ||
227 | /* | |
228 | * Proportional parameter of the PID controller when | |
229 | * overshooting (i.e., when temperature is below the target) | |
230 | */ | |
231 | s32 k_po; | |
232 | ||
233 | /* | |
234 | * Proportional parameter of the PID controller when | |
235 | * undershooting | |
236 | */ | |
237 | s32 k_pu; | |
238 | ||
239 | /* Integral parameter of the PID controller */ | |
240 | s32 k_i; | |
241 | ||
242 | /* Derivative parameter of the PID controller */ | |
243 | s32 k_d; | |
244 | ||
245 | /* threshold below which the error is no longer accumulated */ | |
246 | s32 integral_cutoff; | |
9d0be7f4 EV |
247 | |
248 | /* | |
249 | * @slope: slope of a linear temperature adjustment curve. | |
250 | * Used by thermal zone drivers. | |
251 | */ | |
252 | int slope; | |
253 | /* | |
254 | * @offset: offset of a linear temperature adjustment curve. | |
255 | * Used by thermal zone drivers (default 0). | |
256 | */ | |
257 | int offset; | |
ef873947 D |
258 | }; |
259 | ||
23064088 | 260 | /* Function declarations */ |
4e5e4705 | 261 | #ifdef CONFIG_THERMAL_OF |
3fd6d6e2 DL |
262 | struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data, |
263 | const struct thermal_zone_device_ops *ops); | |
264 | ||
3fd6d6e2 DL |
265 | void devm_thermal_of_zone_unregister(struct device *dev, struct thermal_zone_device *tz); |
266 | ||
4e5e4705 | 267 | #else |
4e5e4705 | 268 | |
f59ac19b DL |
269 | static inline |
270 | struct thermal_zone_device *devm_thermal_of_zone_register(struct device *dev, int id, void *data, | |
271 | const struct thermal_zone_device_ops *ops) | |
e498b498 | 272 | { |
f59ac19b | 273 | return ERR_PTR(-ENOTSUPP); |
e498b498 LD |
274 | } |
275 | ||
f59ac19b DL |
276 | static inline void devm_thermal_of_zone_unregister(struct device *dev, |
277 | struct thermal_zone_device *tz) | |
3fd6d6e2 DL |
278 | { |
279 | } | |
4e5e4705 | 280 | #endif |
12ca7188 | 281 | |
e6ec64f8 JH |
282 | int __thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, |
283 | struct thermal_trip *trip); | |
7c3d5c20 DL |
284 | int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, |
285 | struct thermal_trip *trip); | |
286 | ||
2e38a2a9 DL |
287 | int thermal_zone_set_trip(struct thermal_zone_device *tz, int trip_id, |
288 | const struct thermal_trip *trip); | |
289 | ||
7c3d5c20 DL |
290 | int thermal_zone_get_num_trips(struct thermal_zone_device *tz); |
291 | ||
292 | int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp); | |
293 | ||
7a0e3974 | 294 | #ifdef CONFIG_THERMAL_ACPI |
dd3b3d16 RW |
295 | int thermal_acpi_active_trip_temp(struct acpi_device *adev, int id, int *ret_temp); |
296 | int thermal_acpi_passive_trip_temp(struct acpi_device *adev, int *ret_temp); | |
297 | int thermal_acpi_hot_trip_temp(struct acpi_device *adev, int *ret_temp); | |
298 | int thermal_acpi_critical_trip_temp(struct acpi_device *adev, int *ret_temp); | |
7a0e3974 RW |
299 | #endif |
300 | ||
60518260 | 301 | #ifdef CONFIG_THERMAL |
4b1bf587 | 302 | struct thermal_zone_device *thermal_zone_device_register(const char *, int, int, |
4e5e4705 | 303 | void *, struct thermal_zone_device_ops *, |
6b775e87 | 304 | struct thermal_zone_params *, int, int); |
fae11de5 | 305 | |
203d3d4a ZR |
306 | void thermal_zone_device_unregister(struct thermal_zone_device *); |
307 | ||
fae11de5 DL |
308 | struct thermal_zone_device * |
309 | thermal_zone_device_register_with_trips(const char *, struct thermal_trip *, int, int, | |
310 | void *, struct thermal_zone_device_ops *, | |
311 | struct thermal_zone_params *, int, int); | |
312 | ||
a6ff3c00 | 313 | void *thermal_zone_device_priv(struct thermal_zone_device *tzd); |
072e35c9 | 314 | const char *thermal_zone_device_type(struct thermal_zone_device *tzd); |
3034f859 | 315 | int thermal_zone_device_id(struct thermal_zone_device *tzd); |
7cefbaf0 | 316 | struct device *thermal_zone_device(struct thermal_zone_device *tzd); |
a6ff3c00 | 317 | |
203d3d4a | 318 | int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, |
9d99842f | 319 | struct thermal_cooling_device *, |
6cd9e9f6 KS |
320 | unsigned long, unsigned long, |
321 | unsigned int); | |
203d3d4a ZR |
322 | int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, |
323 | struct thermal_cooling_device *); | |
0e70f466 SP |
324 | void thermal_zone_device_update(struct thermal_zone_device *, |
325 | enum thermal_notify_event); | |
23064088 | 326 | |
f991de53 JFD |
327 | struct thermal_cooling_device *thermal_cooling_device_register(const char *, |
328 | void *, const struct thermal_cooling_device_ops *); | |
a116b5d4 | 329 | struct thermal_cooling_device * |
f991de53 | 330 | thermal_of_cooling_device_register(struct device_node *np, const char *, void *, |
a116b5d4 | 331 | const struct thermal_cooling_device_ops *); |
b4ab114c GR |
332 | struct thermal_cooling_device * |
333 | devm_thermal_of_cooling_device_register(struct device *dev, | |
334 | struct device_node *np, | |
335 | char *type, void *devdata, | |
336 | const struct thermal_cooling_device_ops *ops); | |
790930f4 | 337 | void thermal_cooling_device_update(struct thermal_cooling_device *); |
203d3d4a | 338 | void thermal_cooling_device_unregister(struct thermal_cooling_device *); |
63c4d919 | 339 | struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name); |
17e8351a | 340 | int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp); |
4a7069a3 RN |
341 | int thermal_zone_get_slope(struct thermal_zone_device *tz); |
342 | int thermal_zone_get_offset(struct thermal_zone_device *tz); | |
af06216a | 343 | |
ac5d9ecc AP |
344 | int thermal_zone_device_enable(struct thermal_zone_device *tz); |
345 | int thermal_zone_device_disable(struct thermal_zone_device *tz); | |
d7203eed | 346 | void thermal_zone_device_critical(struct thermal_zone_device *tz); |
12ca7188 NM |
347 | #else |
348 | static inline struct thermal_zone_device *thermal_zone_device_register( | |
349 | const char *type, int trips, int mask, void *devdata, | |
350 | struct thermal_zone_device_ops *ops, | |
023b7b07 | 351 | struct thermal_zone_params *tzp, |
12ca7188 NM |
352 | int passive_delay, int polling_delay) |
353 | { return ERR_PTR(-ENODEV); } | |
354 | static inline void thermal_zone_device_unregister( | |
355 | struct thermal_zone_device *tz) | |
356 | { } | |
12ca7188 | 357 | static inline struct thermal_cooling_device * |
fb836107 | 358 | thermal_cooling_device_register(const char *type, void *devdata, |
12ca7188 NM |
359 | const struct thermal_cooling_device_ops *ops) |
360 | { return ERR_PTR(-ENODEV); } | |
361 | static inline struct thermal_cooling_device * | |
362 | thermal_of_cooling_device_register(struct device_node *np, | |
fb836107 AB |
363 | const char *type, void *devdata, |
364 | const struct thermal_cooling_device_ops *ops) | |
12ca7188 | 365 | { return ERR_PTR(-ENODEV); } |
b4ab114c GR |
366 | static inline struct thermal_cooling_device * |
367 | devm_thermal_of_cooling_device_register(struct device *dev, | |
368 | struct device_node *np, | |
369 | char *type, void *devdata, | |
370 | const struct thermal_cooling_device_ops *ops) | |
371 | { | |
372 | return ERR_PTR(-ENODEV); | |
373 | } | |
12ca7188 NM |
374 | static inline void thermal_cooling_device_unregister( |
375 | struct thermal_cooling_device *cdev) | |
376 | { } | |
377 | static inline struct thermal_zone_device *thermal_zone_get_zone_by_name( | |
378 | const char *name) | |
379 | { return ERR_PTR(-ENODEV); } | |
380 | static inline int thermal_zone_get_temp( | |
17e8351a | 381 | struct thermal_zone_device *tz, int *temp) |
12ca7188 | 382 | { return -ENODEV; } |
4a7069a3 RN |
383 | static inline int thermal_zone_get_slope( |
384 | struct thermal_zone_device *tz) | |
385 | { return -ENODEV; } | |
386 | static inline int thermal_zone_get_offset( | |
387 | struct thermal_zone_device *tz) | |
388 | { return -ENODEV; } | |
f0129c23 | 389 | |
a6ff3c00 DL |
390 | static inline void *thermal_zone_device_priv(struct thermal_zone_device *tz) |
391 | { | |
392 | return NULL; | |
393 | } | |
394 | ||
072e35c9 DL |
395 | static inline const char *thermal_zone_device_type(struct thermal_zone_device *tzd) |
396 | { | |
397 | return NULL; | |
398 | } | |
399 | ||
3034f859 DL |
400 | static inline int thermal_zone_device_id(struct thermal_zone_device *tzd) |
401 | { | |
402 | return -ENODEV; | |
403 | } | |
404 | ||
ac5d9ecc AP |
405 | static inline int thermal_zone_device_enable(struct thermal_zone_device *tz) |
406 | { return -ENODEV; } | |
407 | ||
408 | static inline int thermal_zone_device_disable(struct thermal_zone_device *tz) | |
409 | { return -ENODEV; } | |
12ca7188 NM |
410 | #endif /* CONFIG_THERMAL */ |
411 | ||
a0dd25b2 | 412 | #endif /* __THERMAL_H__ */ |