Commit | Line | Data |
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02361418 ADK |
1 | /* |
2 | * linux/drivers/thermal/cpu_cooling.c | |
3 | * | |
4 | * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com) | |
5 | * Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org> | |
6 | * | |
73904cbc VK |
7 | * Copyright (C) 2014 Viresh Kumar <viresh.kumar@linaro.org> |
8 | * | |
02361418 ADK |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; version 2 of the License. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
02361418 ADK |
25 | #include <linux/module.h> |
26 | #include <linux/thermal.h> | |
02361418 ADK |
27 | #include <linux/cpufreq.h> |
28 | #include <linux/err.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/cpu.h> | |
31 | #include <linux/cpu_cooling.h> | |
32 | ||
07d888d8 VK |
33 | /* |
34 | * Cooling state <-> CPUFreq frequency | |
35 | * | |
36 | * Cooling states are translated to frequencies throughout this driver and this | |
37 | * is the relation between them. | |
38 | * | |
39 | * Highest cooling state corresponds to lowest possible frequency. | |
40 | * | |
41 | * i.e. | |
42 | * level 0 --> 1st Max Freq | |
43 | * level 1 --> 2nd Max Freq | |
44 | * ... | |
45 | */ | |
46 | ||
02361418 | 47 | /** |
3b3c0748 | 48 | * struct cpufreq_cooling_device - data for cooling device with cpufreq |
02361418 ADK |
49 | * @id: unique integer value corresponding to each cpufreq_cooling_device |
50 | * registered. | |
3b3c0748 EV |
51 | * @cool_dev: thermal_cooling_device pointer to keep track of the |
52 | * registered cooling device. | |
02361418 ADK |
53 | * @cpufreq_state: integer value representing the current state of cpufreq |
54 | * cooling devices. | |
55 | * @cpufreq_val: integer value representing the absolute value of the clipped | |
56 | * frequency. | |
dcc6c7fd VK |
57 | * @max_level: maximum cooling level. One less than total number of valid |
58 | * cpufreq frequencies. | |
02361418 | 59 | * @allowed_cpus: all the cpus involved for this cpufreq_cooling_device. |
fc4de356 | 60 | * @node: list_head to link all cpufreq_cooling_device together. |
02361418 | 61 | * |
beca6053 VK |
62 | * This structure is required for keeping information of each registered |
63 | * cpufreq_cooling_device. | |
02361418 ADK |
64 | */ |
65 | struct cpufreq_cooling_device { | |
66 | int id; | |
67 | struct thermal_cooling_device *cool_dev; | |
68 | unsigned int cpufreq_state; | |
69 | unsigned int cpufreq_val; | |
dcc6c7fd | 70 | unsigned int max_level; |
f6859014 | 71 | unsigned int *freq_table; /* In descending order */ |
02361418 | 72 | struct cpumask allowed_cpus; |
2dcd851f | 73 | struct list_head node; |
02361418 | 74 | }; |
02361418 | 75 | static DEFINE_IDR(cpufreq_idr); |
160b7d80 | 76 | static DEFINE_MUTEX(cooling_cpufreq_lock); |
02361418 | 77 | |
2dcd851f | 78 | static LIST_HEAD(cpufreq_dev_list); |
02361418 ADK |
79 | |
80 | /** | |
81 | * get_idr - function to get a unique id. | |
82 | * @idr: struct idr * handle used to create a id. | |
83 | * @id: int * value generated by this function. | |
79491e53 EV |
84 | * |
85 | * This function will populate @id with an unique | |
86 | * id, using the idr API. | |
87 | * | |
88 | * Return: 0 on success, an error code on failure. | |
02361418 ADK |
89 | */ |
90 | static int get_idr(struct idr *idr, int *id) | |
91 | { | |
6deb69fa | 92 | int ret; |
02361418 ADK |
93 | |
94 | mutex_lock(&cooling_cpufreq_lock); | |
6deb69fa | 95 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
02361418 | 96 | mutex_unlock(&cooling_cpufreq_lock); |
6deb69fa TH |
97 | if (unlikely(ret < 0)) |
98 | return ret; | |
99 | *id = ret; | |
79491e53 | 100 | |
02361418 ADK |
101 | return 0; |
102 | } | |
103 | ||
104 | /** | |
105 | * release_idr - function to free the unique id. | |
106 | * @idr: struct idr * handle used for creating the id. | |
107 | * @id: int value representing the unique id. | |
108 | */ | |
109 | static void release_idr(struct idr *idr, int id) | |
110 | { | |
111 | mutex_lock(&cooling_cpufreq_lock); | |
112 | idr_remove(idr, id); | |
113 | mutex_unlock(&cooling_cpufreq_lock); | |
114 | } | |
115 | ||
116 | /* Below code defines functions to be used for cpufreq as cooling device */ | |
117 | ||
118 | /** | |
4843c4a1 | 119 | * get_level: Find the level for a particular frequency |
b9f8b416 | 120 | * @cpufreq_dev: cpufreq_dev for which the property is required |
4843c4a1 | 121 | * @freq: Frequency |
82b9ee40 | 122 | * |
4843c4a1 | 123 | * Return: level on success, THERMAL_CSTATE_INVALID on error. |
02361418 | 124 | */ |
4843c4a1 VK |
125 | static unsigned long get_level(struct cpufreq_cooling_device *cpufreq_dev, |
126 | unsigned int freq) | |
02361418 | 127 | { |
4843c4a1 | 128 | unsigned long level; |
a116776f | 129 | |
4843c4a1 VK |
130 | for (level = 0; level <= cpufreq_dev->max_level; level++) { |
131 | if (freq == cpufreq_dev->freq_table[level]) | |
132 | return level; | |
02361418 | 133 | |
4843c4a1 VK |
134 | if (freq > cpufreq_dev->freq_table[level]) |
135 | break; | |
fc35b35c | 136 | } |
02361418 | 137 | |
4843c4a1 | 138 | return THERMAL_CSTATE_INVALID; |
fc35b35c ZR |
139 | } |
140 | ||
44952d33 | 141 | /** |
728c03c9 | 142 | * cpufreq_cooling_get_level - for a given cpu, return the cooling level. |
44952d33 EV |
143 | * @cpu: cpu for which the level is required |
144 | * @freq: the frequency of interest | |
145 | * | |
146 | * This function will match the cooling level corresponding to the | |
147 | * requested @freq and return it. | |
148 | * | |
149 | * Return: The matched cooling level on success or THERMAL_CSTATE_INVALID | |
150 | * otherwise. | |
151 | */ | |
57df8106 ZR |
152 | unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq) |
153 | { | |
b9f8b416 | 154 | struct cpufreq_cooling_device *cpufreq_dev; |
02361418 | 155 | |
b9f8b416 VK |
156 | mutex_lock(&cooling_cpufreq_lock); |
157 | list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) { | |
158 | if (cpumask_test_cpu(cpu, &cpufreq_dev->allowed_cpus)) { | |
b9f8b416 | 159 | mutex_unlock(&cooling_cpufreq_lock); |
4843c4a1 | 160 | return get_level(cpufreq_dev, freq); |
b9f8b416 | 161 | } |
02361418 | 162 | } |
b9f8b416 | 163 | mutex_unlock(&cooling_cpufreq_lock); |
02361418 | 164 | |
b9f8b416 VK |
165 | pr_err("%s: cpu:%d not part of any cooling device\n", __func__, cpu); |
166 | return THERMAL_CSTATE_INVALID; | |
02361418 | 167 | } |
243dbd9c | 168 | EXPORT_SYMBOL_GPL(cpufreq_cooling_get_level); |
02361418 ADK |
169 | |
170 | /** | |
171 | * cpufreq_thermal_notifier - notifier callback for cpufreq policy change. | |
172 | * @nb: struct notifier_block * with callback info. | |
173 | * @event: value showing cpufreq event for which this function invoked. | |
174 | * @data: callback-specific data | |
bab30554 | 175 | * |
9746b6e7 | 176 | * Callback to hijack the notification on cpufreq policy transition. |
bab30554 EV |
177 | * Every time there is a change in policy, we will intercept and |
178 | * update the cpufreq policy with thermal constraints. | |
179 | * | |
180 | * Return: 0 (success) | |
02361418 ADK |
181 | */ |
182 | static int cpufreq_thermal_notifier(struct notifier_block *nb, | |
5fda7f68 | 183 | unsigned long event, void *data) |
02361418 ADK |
184 | { |
185 | struct cpufreq_policy *policy = data; | |
186 | unsigned long max_freq = 0; | |
2dcd851f | 187 | struct cpufreq_cooling_device *cpufreq_dev; |
02361418 | 188 | |
2dcd851f | 189 | if (event != CPUFREQ_ADJUST) |
02361418 ADK |
190 | return 0; |
191 | ||
2dcd851f YSB |
192 | mutex_lock(&cooling_cpufreq_lock); |
193 | list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) { | |
194 | if (!cpumask_test_cpu(policy->cpu, | |
195 | &cpufreq_dev->allowed_cpus)) | |
196 | continue; | |
197 | ||
2dcd851f | 198 | max_freq = cpufreq_dev->cpufreq_val; |
02361418 | 199 | |
2dcd851f YSB |
200 | if (policy->max != max_freq) |
201 | cpufreq_verify_within_limits(policy, 0, max_freq); | |
202 | } | |
203 | mutex_unlock(&cooling_cpufreq_lock); | |
02361418 ADK |
204 | |
205 | return 0; | |
206 | } | |
207 | ||
1b9e3526 | 208 | /* cpufreq cooling device callback functions are defined below */ |
02361418 ADK |
209 | |
210 | /** | |
211 | * cpufreq_get_max_state - callback function to get the max cooling state. | |
212 | * @cdev: thermal cooling device pointer. | |
213 | * @state: fill this variable with the max cooling state. | |
62c00421 EV |
214 | * |
215 | * Callback for the thermal cooling device to return the cpufreq | |
216 | * max cooling state. | |
217 | * | |
218 | * Return: 0 on success, an error code otherwise. | |
02361418 ADK |
219 | */ |
220 | static int cpufreq_get_max_state(struct thermal_cooling_device *cdev, | |
221 | unsigned long *state) | |
222 | { | |
160b7d80 | 223 | struct cpufreq_cooling_device *cpufreq_device = cdev->devdata; |
9c51b05a | 224 | |
dcc6c7fd VK |
225 | *state = cpufreq_device->max_level; |
226 | return 0; | |
02361418 ADK |
227 | } |
228 | ||
229 | /** | |
230 | * cpufreq_get_cur_state - callback function to get the current cooling state. | |
231 | * @cdev: thermal cooling device pointer. | |
232 | * @state: fill this variable with the current cooling state. | |
3672552d EV |
233 | * |
234 | * Callback for the thermal cooling device to return the cpufreq | |
235 | * current cooling state. | |
236 | * | |
237 | * Return: 0 on success, an error code otherwise. | |
02361418 ADK |
238 | */ |
239 | static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev, | |
240 | unsigned long *state) | |
241 | { | |
160b7d80 | 242 | struct cpufreq_cooling_device *cpufreq_device = cdev->devdata; |
02361418 | 243 | |
160b7d80 | 244 | *state = cpufreq_device->cpufreq_state; |
79491e53 | 245 | |
160b7d80 | 246 | return 0; |
02361418 ADK |
247 | } |
248 | ||
249 | /** | |
250 | * cpufreq_set_cur_state - callback function to set the current cooling state. | |
251 | * @cdev: thermal cooling device pointer. | |
252 | * @state: set this variable to the current cooling state. | |
56e05fdb EV |
253 | * |
254 | * Callback for the thermal cooling device to change the cpufreq | |
255 | * current cooling state. | |
256 | * | |
257 | * Return: 0 on success, an error code otherwise. | |
02361418 ADK |
258 | */ |
259 | static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev, | |
260 | unsigned long state) | |
261 | { | |
160b7d80 | 262 | struct cpufreq_cooling_device *cpufreq_device = cdev->devdata; |
5194fe46 VK |
263 | unsigned int cpu = cpumask_any(&cpufreq_device->allowed_cpus); |
264 | unsigned int clip_freq; | |
4843c4a1 VK |
265 | |
266 | /* Request state should be less than max_level */ | |
267 | if (WARN_ON(state > cpufreq_device->max_level)) | |
268 | return -EINVAL; | |
5194fe46 VK |
269 | |
270 | /* Check if the old cooling action is same as new cooling action */ | |
271 | if (cpufreq_device->cpufreq_state == state) | |
272 | return 0; | |
02361418 | 273 | |
4843c4a1 | 274 | clip_freq = cpufreq_device->freq_table[state]; |
5194fe46 VK |
275 | cpufreq_device->cpufreq_state = state; |
276 | cpufreq_device->cpufreq_val = clip_freq; | |
277 | ||
278 | cpufreq_update_policy(cpu); | |
279 | ||
280 | return 0; | |
02361418 ADK |
281 | } |
282 | ||
283 | /* Bind cpufreq callbacks to thermal cooling device ops */ | |
284 | static struct thermal_cooling_device_ops const cpufreq_cooling_ops = { | |
285 | .get_max_state = cpufreq_get_max_state, | |
286 | .get_cur_state = cpufreq_get_cur_state, | |
287 | .set_cur_state = cpufreq_set_cur_state, | |
288 | }; | |
289 | ||
290 | /* Notifier for cpufreq policy change */ | |
291 | static struct notifier_block thermal_cpufreq_notifier_block = { | |
292 | .notifier_call = cpufreq_thermal_notifier, | |
293 | }; | |
294 | ||
f6859014 VK |
295 | static unsigned int find_next_max(struct cpufreq_frequency_table *table, |
296 | unsigned int prev_max) | |
297 | { | |
298 | struct cpufreq_frequency_table *pos; | |
299 | unsigned int max = 0; | |
300 | ||
301 | cpufreq_for_each_valid_entry(pos, table) { | |
302 | if (pos->frequency > max && pos->frequency < prev_max) | |
303 | max = pos->frequency; | |
304 | } | |
305 | ||
306 | return max; | |
307 | } | |
308 | ||
02361418 | 309 | /** |
39d99cff EV |
310 | * __cpufreq_cooling_register - helper function to create cpufreq cooling device |
311 | * @np: a valid struct device_node to the cooling device device tree node | |
02361418 | 312 | * @clip_cpus: cpumask of cpus where the frequency constraints will happen. |
405fb825 | 313 | * Normally this should be same as cpufreq policy->related_cpus. |
12cb08ba EV |
314 | * |
315 | * This interface function registers the cpufreq cooling device with the name | |
316 | * "thermal-cpufreq-%x". This api can support multiple instances of cpufreq | |
39d99cff EV |
317 | * cooling devices. It also gives the opportunity to link the cooling device |
318 | * with a device tree node, in order to bind it via the thermal DT code. | |
12cb08ba EV |
319 | * |
320 | * Return: a valid struct thermal_cooling_device pointer on success, | |
321 | * on failure, it returns a corresponding ERR_PTR(). | |
02361418 | 322 | */ |
39d99cff EV |
323 | static struct thermal_cooling_device * |
324 | __cpufreq_cooling_register(struct device_node *np, | |
325 | const struct cpumask *clip_cpus) | |
02361418 ADK |
326 | { |
327 | struct thermal_cooling_device *cool_dev; | |
5d3bdb89 | 328 | struct cpufreq_cooling_device *cpufreq_dev; |
02361418 | 329 | char dev_name[THERMAL_NAME_LENGTH]; |
dcc6c7fd | 330 | struct cpufreq_frequency_table *pos, *table; |
f6859014 | 331 | unsigned int freq, i; |
405fb825 | 332 | int ret; |
02361418 | 333 | |
dcc6c7fd VK |
334 | table = cpufreq_frequency_get_table(cpumask_first(clip_cpus)); |
335 | if (!table) { | |
0f1be51c EV |
336 | pr_debug("%s: CPUFreq table not found\n", __func__); |
337 | return ERR_PTR(-EPROBE_DEFER); | |
02361418 | 338 | } |
0f1be51c | 339 | |
98d522f0 | 340 | cpufreq_dev = kzalloc(sizeof(*cpufreq_dev), GFP_KERNEL); |
02361418 ADK |
341 | if (!cpufreq_dev) |
342 | return ERR_PTR(-ENOMEM); | |
343 | ||
dcc6c7fd VK |
344 | /* Find max levels */ |
345 | cpufreq_for_each_valid_entry(pos, table) | |
346 | cpufreq_dev->max_level++; | |
347 | ||
f6859014 VK |
348 | cpufreq_dev->freq_table = kmalloc(sizeof(*cpufreq_dev->freq_table) * |
349 | cpufreq_dev->max_level, GFP_KERNEL); | |
350 | if (!cpufreq_dev->freq_table) { | |
f6859014 VK |
351 | cool_dev = ERR_PTR(-ENOMEM); |
352 | goto free_cdev; | |
353 | } | |
354 | ||
dcc6c7fd VK |
355 | /* max_level is an index, not a counter */ |
356 | cpufreq_dev->max_level--; | |
357 | ||
02361418 ADK |
358 | cpumask_copy(&cpufreq_dev->allowed_cpus, clip_cpus); |
359 | ||
02361418 ADK |
360 | ret = get_idr(&cpufreq_idr, &cpufreq_dev->id); |
361 | if (ret) { | |
730abe06 | 362 | cool_dev = ERR_PTR(ret); |
f6859014 | 363 | goto free_table; |
02361418 ADK |
364 | } |
365 | ||
99871a71 EV |
366 | snprintf(dev_name, sizeof(dev_name), "thermal-cpufreq-%d", |
367 | cpufreq_dev->id); | |
02361418 | 368 | |
39d99cff EV |
369 | cool_dev = thermal_of_cooling_device_register(np, dev_name, cpufreq_dev, |
370 | &cpufreq_cooling_ops); | |
730abe06 VK |
371 | if (IS_ERR(cool_dev)) |
372 | goto remove_idr; | |
373 | ||
f6859014 VK |
374 | /* Fill freq-table in descending order of frequencies */ |
375 | for (i = 0, freq = -1; i <= cpufreq_dev->max_level; i++) { | |
376 | freq = find_next_max(table, freq); | |
377 | cpufreq_dev->freq_table[i] = freq; | |
378 | ||
379 | /* Warn for duplicate entries */ | |
380 | if (!freq) | |
381 | pr_warn("%s: table has duplicate entries\n", __func__); | |
382 | else | |
383 | pr_debug("%s: freq:%u KHz\n", __func__, freq); | |
02361418 | 384 | } |
f6859014 | 385 | |
4843c4a1 | 386 | cpufreq_dev->cpufreq_val = cpufreq_dev->freq_table[0]; |
02361418 | 387 | cpufreq_dev->cool_dev = cool_dev; |
92e615ec | 388 | |
02361418 | 389 | mutex_lock(&cooling_cpufreq_lock); |
02361418 ADK |
390 | |
391 | /* Register the notifier for first cpufreq cooling device */ | |
2479bb64 | 392 | if (list_empty(&cpufreq_dev_list)) |
02361418 | 393 | cpufreq_register_notifier(&thermal_cpufreq_notifier_block, |
5fda7f68 | 394 | CPUFREQ_POLICY_NOTIFIER); |
2dcd851f | 395 | list_add(&cpufreq_dev->node, &cpufreq_dev_list); |
02361418 ADK |
396 | |
397 | mutex_unlock(&cooling_cpufreq_lock); | |
79491e53 | 398 | |
730abe06 VK |
399 | return cool_dev; |
400 | ||
401 | remove_idr: | |
402 | release_idr(&cpufreq_idr, cpufreq_dev->id); | |
f6859014 VK |
403 | free_table: |
404 | kfree(cpufreq_dev->freq_table); | |
730abe06 VK |
405 | free_cdev: |
406 | kfree(cpufreq_dev); | |
407 | ||
02361418 ADK |
408 | return cool_dev; |
409 | } | |
39d99cff EV |
410 | |
411 | /** | |
412 | * cpufreq_cooling_register - function to create cpufreq cooling device. | |
413 | * @clip_cpus: cpumask of cpus where the frequency constraints will happen. | |
414 | * | |
415 | * This interface function registers the cpufreq cooling device with the name | |
416 | * "thermal-cpufreq-%x". This api can support multiple instances of cpufreq | |
417 | * cooling devices. | |
418 | * | |
419 | * Return: a valid struct thermal_cooling_device pointer on success, | |
420 | * on failure, it returns a corresponding ERR_PTR(). | |
421 | */ | |
422 | struct thermal_cooling_device * | |
423 | cpufreq_cooling_register(const struct cpumask *clip_cpus) | |
424 | { | |
425 | return __cpufreq_cooling_register(NULL, clip_cpus); | |
426 | } | |
243dbd9c | 427 | EXPORT_SYMBOL_GPL(cpufreq_cooling_register); |
02361418 | 428 | |
39d99cff EV |
429 | /** |
430 | * of_cpufreq_cooling_register - function to create cpufreq cooling device. | |
431 | * @np: a valid struct device_node to the cooling device device tree node | |
432 | * @clip_cpus: cpumask of cpus where the frequency constraints will happen. | |
433 | * | |
434 | * This interface function registers the cpufreq cooling device with the name | |
435 | * "thermal-cpufreq-%x". This api can support multiple instances of cpufreq | |
436 | * cooling devices. Using this API, the cpufreq cooling device will be | |
437 | * linked to the device tree node provided. | |
438 | * | |
439 | * Return: a valid struct thermal_cooling_device pointer on success, | |
440 | * on failure, it returns a corresponding ERR_PTR(). | |
441 | */ | |
442 | struct thermal_cooling_device * | |
443 | of_cpufreq_cooling_register(struct device_node *np, | |
444 | const struct cpumask *clip_cpus) | |
445 | { | |
446 | if (!np) | |
447 | return ERR_PTR(-EINVAL); | |
448 | ||
449 | return __cpufreq_cooling_register(np, clip_cpus); | |
450 | } | |
451 | EXPORT_SYMBOL_GPL(of_cpufreq_cooling_register); | |
452 | ||
02361418 ADK |
453 | /** |
454 | * cpufreq_cooling_unregister - function to remove cpufreq cooling device. | |
455 | * @cdev: thermal cooling device pointer. | |
135266b4 EV |
456 | * |
457 | * This interface function unregisters the "thermal-cpufreq-%x" cooling device. | |
02361418 ADK |
458 | */ |
459 | void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) | |
460 | { | |
50e66c7e | 461 | struct cpufreq_cooling_device *cpufreq_dev; |
02361418 | 462 | |
50e66c7e EV |
463 | if (!cdev) |
464 | return; | |
465 | ||
466 | cpufreq_dev = cdev->devdata; | |
02361418 | 467 | mutex_lock(&cooling_cpufreq_lock); |
2dcd851f | 468 | list_del(&cpufreq_dev->node); |
02361418 ADK |
469 | |
470 | /* Unregister the notifier for the last cpufreq cooling device */ | |
2479bb64 | 471 | if (list_empty(&cpufreq_dev_list)) |
02361418 | 472 | cpufreq_unregister_notifier(&thermal_cpufreq_notifier_block, |
5fda7f68 | 473 | CPUFREQ_POLICY_NOTIFIER); |
02361418 | 474 | mutex_unlock(&cooling_cpufreq_lock); |
160b7d80 | 475 | |
02361418 ADK |
476 | thermal_cooling_device_unregister(cpufreq_dev->cool_dev); |
477 | release_idr(&cpufreq_idr, cpufreq_dev->id); | |
f6859014 | 478 | kfree(cpufreq_dev->freq_table); |
02361418 ADK |
479 | kfree(cpufreq_dev); |
480 | } | |
243dbd9c | 481 | EXPORT_SYMBOL_GPL(cpufreq_cooling_unregister); |