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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 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; version 2 of the License. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License along | |
18 | * with this program; if not, write to the Free Software Foundation, Inc., | |
19 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
20 | * | |
21 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
22 | */ | |
02361418 ADK |
23 | #include <linux/module.h> |
24 | #include <linux/thermal.h> | |
02361418 ADK |
25 | #include <linux/cpufreq.h> |
26 | #include <linux/err.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/cpu.h> | |
29 | #include <linux/cpu_cooling.h> | |
30 | ||
07d888d8 VK |
31 | /* |
32 | * Cooling state <-> CPUFreq frequency | |
33 | * | |
34 | * Cooling states are translated to frequencies throughout this driver and this | |
35 | * is the relation between them. | |
36 | * | |
37 | * Highest cooling state corresponds to lowest possible frequency. | |
38 | * | |
39 | * i.e. | |
40 | * level 0 --> 1st Max Freq | |
41 | * level 1 --> 2nd Max Freq | |
42 | * ... | |
43 | */ | |
44 | ||
02361418 | 45 | /** |
3b3c0748 | 46 | * struct cpufreq_cooling_device - data for cooling device with cpufreq |
02361418 ADK |
47 | * @id: unique integer value corresponding to each cpufreq_cooling_device |
48 | * registered. | |
3b3c0748 EV |
49 | * @cool_dev: thermal_cooling_device pointer to keep track of the |
50 | * registered cooling device. | |
02361418 ADK |
51 | * @cpufreq_state: integer value representing the current state of cpufreq |
52 | * cooling devices. | |
53 | * @cpufreq_val: integer value representing the absolute value of the clipped | |
54 | * frequency. | |
dcc6c7fd VK |
55 | * @max_level: maximum cooling level. One less than total number of valid |
56 | * cpufreq frequencies. | |
02361418 | 57 | * @allowed_cpus: all the cpus involved for this cpufreq_cooling_device. |
02361418 | 58 | * |
beca6053 VK |
59 | * This structure is required for keeping information of each registered |
60 | * cpufreq_cooling_device. | |
02361418 ADK |
61 | */ |
62 | struct cpufreq_cooling_device { | |
63 | int id; | |
64 | struct thermal_cooling_device *cool_dev; | |
65 | unsigned int cpufreq_state; | |
66 | unsigned int cpufreq_val; | |
dcc6c7fd | 67 | unsigned int max_level; |
f6859014 | 68 | unsigned int *freq_table; /* In descending order */ |
02361418 | 69 | struct cpumask allowed_cpus; |
2dcd851f | 70 | struct list_head node; |
02361418 | 71 | }; |
02361418 | 72 | static DEFINE_IDR(cpufreq_idr); |
160b7d80 | 73 | static DEFINE_MUTEX(cooling_cpufreq_lock); |
02361418 | 74 | |
2dcd851f | 75 | static LIST_HEAD(cpufreq_dev_list); |
02361418 ADK |
76 | |
77 | /** | |
78 | * get_idr - function to get a unique id. | |
79 | * @idr: struct idr * handle used to create a id. | |
80 | * @id: int * value generated by this function. | |
79491e53 EV |
81 | * |
82 | * This function will populate @id with an unique | |
83 | * id, using the idr API. | |
84 | * | |
85 | * Return: 0 on success, an error code on failure. | |
02361418 ADK |
86 | */ |
87 | static int get_idr(struct idr *idr, int *id) | |
88 | { | |
6deb69fa | 89 | int ret; |
02361418 ADK |
90 | |
91 | mutex_lock(&cooling_cpufreq_lock); | |
6deb69fa | 92 | ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL); |
02361418 | 93 | mutex_unlock(&cooling_cpufreq_lock); |
6deb69fa TH |
94 | if (unlikely(ret < 0)) |
95 | return ret; | |
96 | *id = ret; | |
79491e53 | 97 | |
02361418 ADK |
98 | return 0; |
99 | } | |
100 | ||
101 | /** | |
102 | * release_idr - function to free the unique id. | |
103 | * @idr: struct idr * handle used for creating the id. | |
104 | * @id: int value representing the unique id. | |
105 | */ | |
106 | static void release_idr(struct idr *idr, int id) | |
107 | { | |
108 | mutex_lock(&cooling_cpufreq_lock); | |
109 | idr_remove(idr, id); | |
110 | mutex_unlock(&cooling_cpufreq_lock); | |
111 | } | |
112 | ||
113 | /* Below code defines functions to be used for cpufreq as cooling device */ | |
114 | ||
2d6f28fe | 115 | /** |
4843c4a1 | 116 | * get_level: Find the level for a particular frequency |
b9f8b416 | 117 | * @cpufreq_dev: cpufreq_dev for which the property is required |
4843c4a1 | 118 | * @freq: Frequency |
728c03c9 | 119 | * |
4843c4a1 | 120 | * Return: level on success, THERMAL_CSTATE_INVALID on error. |
2d6f28fe | 121 | */ |
4843c4a1 VK |
122 | static unsigned long get_level(struct cpufreq_cooling_device *cpufreq_dev, |
123 | unsigned int freq) | |
02361418 | 124 | { |
4843c4a1 | 125 | unsigned long level; |
fc35b35c | 126 | |
4843c4a1 VK |
127 | for (level = 0; level <= cpufreq_dev->max_level; level++) { |
128 | if (freq == cpufreq_dev->freq_table[level]) | |
129 | return level; | |
fc35b35c | 130 | |
4843c4a1 VK |
131 | if (freq > cpufreq_dev->freq_table[level]) |
132 | break; | |
02361418 | 133 | } |
79491e53 | 134 | |
4843c4a1 | 135 | return THERMAL_CSTATE_INVALID; |
fc35b35c ZR |
136 | } |
137 | ||
44952d33 | 138 | /** |
728c03c9 | 139 | * cpufreq_cooling_get_level - for a given cpu, return the cooling level. |
44952d33 EV |
140 | * @cpu: cpu for which the level is required |
141 | * @freq: the frequency of interest | |
142 | * | |
143 | * This function will match the cooling level corresponding to the | |
144 | * requested @freq and return it. | |
145 | * | |
146 | * Return: The matched cooling level on success or THERMAL_CSTATE_INVALID | |
147 | * otherwise. | |
148 | */ | |
57df8106 ZR |
149 | unsigned long cpufreq_cooling_get_level(unsigned int cpu, unsigned int freq) |
150 | { | |
b9f8b416 | 151 | struct cpufreq_cooling_device *cpufreq_dev; |
57df8106 | 152 | |
b9f8b416 VK |
153 | mutex_lock(&cooling_cpufreq_lock); |
154 | list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) { | |
155 | if (cpumask_test_cpu(cpu, &cpufreq_dev->allowed_cpus)) { | |
b9f8b416 | 156 | mutex_unlock(&cooling_cpufreq_lock); |
4843c4a1 | 157 | return get_level(cpufreq_dev, freq); |
b9f8b416 VK |
158 | } |
159 | } | |
160 | mutex_unlock(&cooling_cpufreq_lock); | |
79491e53 | 161 | |
b9f8b416 VK |
162 | pr_err("%s: cpu:%d not part of any cooling device\n", __func__, cpu); |
163 | return THERMAL_CSTATE_INVALID; | |
57df8106 | 164 | } |
243dbd9c | 165 | EXPORT_SYMBOL_GPL(cpufreq_cooling_get_level); |
57df8106 | 166 | |
02361418 ADK |
167 | /** |
168 | * cpufreq_thermal_notifier - notifier callback for cpufreq policy change. | |
169 | * @nb: struct notifier_block * with callback info. | |
170 | * @event: value showing cpufreq event for which this function invoked. | |
171 | * @data: callback-specific data | |
bab30554 | 172 | * |
9746b6e7 | 173 | * Callback to hijack the notification on cpufreq policy transition. |
bab30554 EV |
174 | * Every time there is a change in policy, we will intercept and |
175 | * update the cpufreq policy with thermal constraints. | |
176 | * | |
177 | * Return: 0 (success) | |
02361418 ADK |
178 | */ |
179 | static int cpufreq_thermal_notifier(struct notifier_block *nb, | |
5fda7f68 | 180 | unsigned long event, void *data) |
02361418 ADK |
181 | { |
182 | struct cpufreq_policy *policy = data; | |
183 | unsigned long max_freq = 0; | |
2dcd851f | 184 | struct cpufreq_cooling_device *cpufreq_dev; |
02361418 | 185 | |
2dcd851f | 186 | if (event != CPUFREQ_ADJUST) |
02361418 ADK |
187 | return 0; |
188 | ||
2dcd851f YSB |
189 | mutex_lock(&cooling_cpufreq_lock); |
190 | list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) { | |
191 | if (!cpumask_test_cpu(policy->cpu, | |
192 | &cpufreq_dev->allowed_cpus)) | |
193 | continue; | |
194 | ||
2dcd851f | 195 | max_freq = cpufreq_dev->cpufreq_val; |
02361418 | 196 | |
2dcd851f YSB |
197 | if (policy->max != max_freq) |
198 | cpufreq_verify_within_limits(policy, 0, max_freq); | |
199 | } | |
200 | mutex_unlock(&cooling_cpufreq_lock); | |
02361418 ADK |
201 | |
202 | return 0; | |
203 | } | |
204 | ||
1b9e3526 | 205 | /* cpufreq cooling device callback functions are defined below */ |
02361418 ADK |
206 | |
207 | /** | |
208 | * cpufreq_get_max_state - callback function to get the max cooling state. | |
209 | * @cdev: thermal cooling device pointer. | |
210 | * @state: fill this variable with the max cooling state. | |
62c00421 EV |
211 | * |
212 | * Callback for the thermal cooling device to return the cpufreq | |
213 | * max cooling state. | |
214 | * | |
215 | * Return: 0 on success, an error code otherwise. | |
02361418 ADK |
216 | */ |
217 | static int cpufreq_get_max_state(struct thermal_cooling_device *cdev, | |
218 | unsigned long *state) | |
219 | { | |
160b7d80 | 220 | struct cpufreq_cooling_device *cpufreq_device = cdev->devdata; |
02361418 | 221 | |
dcc6c7fd VK |
222 | *state = cpufreq_device->max_level; |
223 | return 0; | |
02361418 ADK |
224 | } |
225 | ||
226 | /** | |
227 | * cpufreq_get_cur_state - callback function to get the current cooling state. | |
228 | * @cdev: thermal cooling device pointer. | |
229 | * @state: fill this variable with the current cooling state. | |
3672552d EV |
230 | * |
231 | * Callback for the thermal cooling device to return the cpufreq | |
232 | * current cooling state. | |
233 | * | |
234 | * Return: 0 on success, an error code otherwise. | |
02361418 ADK |
235 | */ |
236 | static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev, | |
237 | unsigned long *state) | |
238 | { | |
160b7d80 | 239 | struct cpufreq_cooling_device *cpufreq_device = cdev->devdata; |
02361418 | 240 | |
160b7d80 | 241 | *state = cpufreq_device->cpufreq_state; |
79491e53 | 242 | |
160b7d80 | 243 | return 0; |
02361418 ADK |
244 | } |
245 | ||
246 | /** | |
247 | * cpufreq_set_cur_state - callback function to set the current cooling state. | |
248 | * @cdev: thermal cooling device pointer. | |
249 | * @state: set this variable to the current cooling state. | |
56e05fdb EV |
250 | * |
251 | * Callback for the thermal cooling device to change the cpufreq | |
252 | * current cooling state. | |
253 | * | |
254 | * Return: 0 on success, an error code otherwise. | |
02361418 ADK |
255 | */ |
256 | static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev, | |
257 | unsigned long state) | |
258 | { | |
160b7d80 | 259 | struct cpufreq_cooling_device *cpufreq_device = cdev->devdata; |
5194fe46 VK |
260 | unsigned int cpu = cpumask_any(&cpufreq_device->allowed_cpus); |
261 | unsigned int clip_freq; | |
4843c4a1 VK |
262 | |
263 | /* Request state should be less than max_level */ | |
264 | if (WARN_ON(state > cpufreq_device->max_level)) | |
265 | return -EINVAL; | |
5194fe46 VK |
266 | |
267 | /* Check if the old cooling action is same as new cooling action */ | |
268 | if (cpufreq_device->cpufreq_state == state) | |
269 | return 0; | |
02361418 | 270 | |
4843c4a1 | 271 | clip_freq = cpufreq_device->freq_table[state]; |
5194fe46 VK |
272 | cpufreq_device->cpufreq_state = state; |
273 | cpufreq_device->cpufreq_val = clip_freq; | |
274 | ||
275 | cpufreq_update_policy(cpu); | |
276 | ||
277 | return 0; | |
02361418 ADK |
278 | } |
279 | ||
280 | /* Bind cpufreq callbacks to thermal cooling device ops */ | |
281 | static struct thermal_cooling_device_ops const cpufreq_cooling_ops = { | |
282 | .get_max_state = cpufreq_get_max_state, | |
283 | .get_cur_state = cpufreq_get_cur_state, | |
284 | .set_cur_state = cpufreq_set_cur_state, | |
285 | }; | |
286 | ||
287 | /* Notifier for cpufreq policy change */ | |
288 | static struct notifier_block thermal_cpufreq_notifier_block = { | |
289 | .notifier_call = cpufreq_thermal_notifier, | |
290 | }; | |
291 | ||
f6859014 VK |
292 | static unsigned int find_next_max(struct cpufreq_frequency_table *table, |
293 | unsigned int prev_max) | |
294 | { | |
295 | struct cpufreq_frequency_table *pos; | |
296 | unsigned int max = 0; | |
297 | ||
298 | cpufreq_for_each_valid_entry(pos, table) { | |
299 | if (pos->frequency > max && pos->frequency < prev_max) | |
300 | max = pos->frequency; | |
301 | } | |
302 | ||
303 | return max; | |
304 | } | |
305 | ||
02361418 | 306 | /** |
39d99cff EV |
307 | * __cpufreq_cooling_register - helper function to create cpufreq cooling device |
308 | * @np: a valid struct device_node to the cooling device device tree node | |
02361418 | 309 | * @clip_cpus: cpumask of cpus where the frequency constraints will happen. |
405fb825 | 310 | * Normally this should be same as cpufreq policy->related_cpus. |
12cb08ba EV |
311 | * |
312 | * This interface function registers the cpufreq cooling device with the name | |
313 | * "thermal-cpufreq-%x". This api can support multiple instances of cpufreq | |
39d99cff EV |
314 | * cooling devices. It also gives the opportunity to link the cooling device |
315 | * with a device tree node, in order to bind it via the thermal DT code. | |
12cb08ba EV |
316 | * |
317 | * Return: a valid struct thermal_cooling_device pointer on success, | |
318 | * on failure, it returns a corresponding ERR_PTR(). | |
02361418 | 319 | */ |
39d99cff EV |
320 | static struct thermal_cooling_device * |
321 | __cpufreq_cooling_register(struct device_node *np, | |
322 | const struct cpumask *clip_cpus) | |
02361418 ADK |
323 | { |
324 | struct thermal_cooling_device *cool_dev; | |
5d3bdb89 | 325 | struct cpufreq_cooling_device *cpufreq_dev; |
02361418 | 326 | char dev_name[THERMAL_NAME_LENGTH]; |
dcc6c7fd | 327 | struct cpufreq_frequency_table *pos, *table; |
f6859014 | 328 | unsigned int freq, i; |
405fb825 | 329 | int ret; |
02361418 | 330 | |
dcc6c7fd VK |
331 | table = cpufreq_frequency_get_table(cpumask_first(clip_cpus)); |
332 | if (!table) { | |
0f1be51c EV |
333 | pr_debug("%s: CPUFreq table not found\n", __func__); |
334 | return ERR_PTR(-EPROBE_DEFER); | |
335 | } | |
336 | ||
98d522f0 | 337 | cpufreq_dev = kzalloc(sizeof(*cpufreq_dev), GFP_KERNEL); |
02361418 ADK |
338 | if (!cpufreq_dev) |
339 | return ERR_PTR(-ENOMEM); | |
340 | ||
dcc6c7fd VK |
341 | /* Find max levels */ |
342 | cpufreq_for_each_valid_entry(pos, table) | |
343 | cpufreq_dev->max_level++; | |
344 | ||
f6859014 VK |
345 | cpufreq_dev->freq_table = kmalloc(sizeof(*cpufreq_dev->freq_table) * |
346 | cpufreq_dev->max_level, GFP_KERNEL); | |
347 | if (!cpufreq_dev->freq_table) { | |
348 | return ERR_PTR(-ENOMEM); | |
349 | cool_dev = ERR_PTR(-ENOMEM); | |
350 | goto free_cdev; | |
351 | } | |
352 | ||
dcc6c7fd VK |
353 | /* max_level is an index, not a counter */ |
354 | cpufreq_dev->max_level--; | |
355 | ||
02361418 ADK |
356 | cpumask_copy(&cpufreq_dev->allowed_cpus, clip_cpus); |
357 | ||
02361418 ADK |
358 | ret = get_idr(&cpufreq_idr, &cpufreq_dev->id); |
359 | if (ret) { | |
730abe06 | 360 | cool_dev = ERR_PTR(ret); |
f6859014 | 361 | goto free_table; |
02361418 ADK |
362 | } |
363 | ||
99871a71 EV |
364 | snprintf(dev_name, sizeof(dev_name), "thermal-cpufreq-%d", |
365 | cpufreq_dev->id); | |
02361418 | 366 | |
39d99cff EV |
367 | cool_dev = thermal_of_cooling_device_register(np, dev_name, cpufreq_dev, |
368 | &cpufreq_cooling_ops); | |
730abe06 VK |
369 | if (IS_ERR(cool_dev)) |
370 | goto remove_idr; | |
371 | ||
f6859014 VK |
372 | /* Fill freq-table in descending order of frequencies */ |
373 | for (i = 0, freq = -1; i <= cpufreq_dev->max_level; i++) { | |
374 | freq = find_next_max(table, freq); | |
375 | cpufreq_dev->freq_table[i] = freq; | |
376 | ||
377 | /* Warn for duplicate entries */ | |
378 | if (!freq) | |
379 | pr_warn("%s: table has duplicate entries\n", __func__); | |
380 | else | |
381 | pr_debug("%s: freq:%u KHz\n", __func__, freq); | |
382 | } | |
383 | ||
4843c4a1 | 384 | cpufreq_dev->cpufreq_val = cpufreq_dev->freq_table[0]; |
02361418 | 385 | cpufreq_dev->cool_dev = cool_dev; |
92e615ec | 386 | |
02361418 | 387 | mutex_lock(&cooling_cpufreq_lock); |
02361418 ADK |
388 | |
389 | /* Register the notifier for first cpufreq cooling device */ | |
2479bb64 | 390 | if (list_empty(&cpufreq_dev_list)) |
02361418 | 391 | cpufreq_register_notifier(&thermal_cpufreq_notifier_block, |
5fda7f68 | 392 | CPUFREQ_POLICY_NOTIFIER); |
2dcd851f | 393 | list_add(&cpufreq_dev->node, &cpufreq_dev_list); |
02361418 ADK |
394 | |
395 | mutex_unlock(&cooling_cpufreq_lock); | |
79491e53 | 396 | |
730abe06 VK |
397 | return cool_dev; |
398 | ||
399 | remove_idr: | |
400 | release_idr(&cpufreq_idr, cpufreq_dev->id); | |
f6859014 VK |
401 | free_table: |
402 | kfree(cpufreq_dev->freq_table); | |
730abe06 VK |
403 | free_cdev: |
404 | kfree(cpufreq_dev); | |
405 | ||
02361418 ADK |
406 | return cool_dev; |
407 | } | |
39d99cff EV |
408 | |
409 | /** | |
410 | * cpufreq_cooling_register - function to create cpufreq cooling device. | |
411 | * @clip_cpus: cpumask of cpus where the frequency constraints will happen. | |
412 | * | |
413 | * This interface function registers the cpufreq cooling device with the name | |
414 | * "thermal-cpufreq-%x". This api can support multiple instances of cpufreq | |
415 | * cooling devices. | |
416 | * | |
417 | * Return: a valid struct thermal_cooling_device pointer on success, | |
418 | * on failure, it returns a corresponding ERR_PTR(). | |
419 | */ | |
420 | struct thermal_cooling_device * | |
421 | cpufreq_cooling_register(const struct cpumask *clip_cpus) | |
422 | { | |
423 | return __cpufreq_cooling_register(NULL, clip_cpus); | |
424 | } | |
243dbd9c | 425 | EXPORT_SYMBOL_GPL(cpufreq_cooling_register); |
02361418 | 426 | |
39d99cff EV |
427 | /** |
428 | * of_cpufreq_cooling_register - function to create cpufreq cooling device. | |
429 | * @np: a valid struct device_node to the cooling device device tree node | |
430 | * @clip_cpus: cpumask of cpus where the frequency constraints will happen. | |
431 | * | |
432 | * This interface function registers the cpufreq cooling device with the name | |
433 | * "thermal-cpufreq-%x". This api can support multiple instances of cpufreq | |
434 | * cooling devices. Using this API, the cpufreq cooling device will be | |
435 | * linked to the device tree node provided. | |
436 | * | |
437 | * Return: a valid struct thermal_cooling_device pointer on success, | |
438 | * on failure, it returns a corresponding ERR_PTR(). | |
439 | */ | |
440 | struct thermal_cooling_device * | |
441 | of_cpufreq_cooling_register(struct device_node *np, | |
442 | const struct cpumask *clip_cpus) | |
443 | { | |
444 | if (!np) | |
445 | return ERR_PTR(-EINVAL); | |
446 | ||
447 | return __cpufreq_cooling_register(np, clip_cpus); | |
448 | } | |
449 | EXPORT_SYMBOL_GPL(of_cpufreq_cooling_register); | |
450 | ||
02361418 ADK |
451 | /** |
452 | * cpufreq_cooling_unregister - function to remove cpufreq cooling device. | |
453 | * @cdev: thermal cooling device pointer. | |
135266b4 EV |
454 | * |
455 | * This interface function unregisters the "thermal-cpufreq-%x" cooling device. | |
02361418 ADK |
456 | */ |
457 | void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev) | |
458 | { | |
50e66c7e | 459 | struct cpufreq_cooling_device *cpufreq_dev; |
02361418 | 460 | |
50e66c7e EV |
461 | if (!cdev) |
462 | return; | |
463 | ||
464 | cpufreq_dev = cdev->devdata; | |
02361418 | 465 | mutex_lock(&cooling_cpufreq_lock); |
2dcd851f | 466 | list_del(&cpufreq_dev->node); |
02361418 ADK |
467 | |
468 | /* Unregister the notifier for the last cpufreq cooling device */ | |
2479bb64 | 469 | if (list_empty(&cpufreq_dev_list)) |
02361418 | 470 | cpufreq_unregister_notifier(&thermal_cpufreq_notifier_block, |
5fda7f68 | 471 | CPUFREQ_POLICY_NOTIFIER); |
02361418 | 472 | mutex_unlock(&cooling_cpufreq_lock); |
160b7d80 | 473 | |
02361418 ADK |
474 | thermal_cooling_device_unregister(cpufreq_dev->cool_dev); |
475 | release_idr(&cpufreq_idr, cpufreq_dev->id); | |
f6859014 | 476 | kfree(cpufreq_dev->freq_table); |
02361418 ADK |
477 | kfree(cpufreq_dev); |
478 | } | |
243dbd9c | 479 | EXPORT_SYMBOL_GPL(cpufreq_cooling_unregister); |