Commit | Line | Data |
---|---|---|
f721889f RW |
1 | /* |
2 | * drivers/base/power/domain.c - Common code related to device power domains. | |
3 | * | |
4 | * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp. | |
5 | * | |
6 | * This file is released under the GPLv2. | |
7 | */ | |
8 | ||
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/io.h> | |
12 | #include <linux/pm_runtime.h> | |
13 | #include <linux/pm_domain.h> | |
6ff7bb0d | 14 | #include <linux/pm_qos.h> |
f721889f RW |
15 | #include <linux/slab.h> |
16 | #include <linux/err.h> | |
17b75eca RW |
17 | #include <linux/sched.h> |
18 | #include <linux/suspend.h> | |
d5e4cbfe RW |
19 | #include <linux/export.h> |
20 | ||
21 | #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \ | |
22 | ({ \ | |
23 | type (*__routine)(struct device *__d); \ | |
24 | type __ret = (type)0; \ | |
25 | \ | |
26 | __routine = genpd->dev_ops.callback; \ | |
27 | if (__routine) { \ | |
28 | __ret = __routine(dev); \ | |
29 | } else { \ | |
30 | __routine = dev_gpd_data(dev)->ops.callback; \ | |
31 | if (__routine) \ | |
32 | __ret = __routine(dev); \ | |
33 | } \ | |
34 | __ret; \ | |
35 | }) | |
f721889f | 36 | |
0140d8bd RW |
37 | #define GENPD_DEV_TIMED_CALLBACK(genpd, type, callback, dev, field, name) \ |
38 | ({ \ | |
39 | ktime_t __start = ktime_get(); \ | |
40 | type __retval = GENPD_DEV_CALLBACK(genpd, type, callback, dev); \ | |
41 | s64 __elapsed = ktime_to_ns(ktime_sub(ktime_get(), __start)); \ | |
6ff7bb0d RW |
42 | struct gpd_timing_data *__td = &dev_gpd_data(dev)->td; \ |
43 | if (!__retval && __elapsed > __td->field) { \ | |
44 | __td->field = __elapsed; \ | |
0140d8bd RW |
45 | dev_warn(dev, name " latency exceeded, new value %lld ns\n", \ |
46 | __elapsed); \ | |
6ff7bb0d RW |
47 | genpd->max_off_time_changed = true; \ |
48 | __td->constraint_changed = true; \ | |
0140d8bd RW |
49 | } \ |
50 | __retval; \ | |
51 | }) | |
52 | ||
5125bbf3 RW |
53 | static LIST_HEAD(gpd_list); |
54 | static DEFINE_MUTEX(gpd_list_lock); | |
55 | ||
5248051b RW |
56 | #ifdef CONFIG_PM |
57 | ||
b02c999a | 58 | struct generic_pm_domain *dev_to_genpd(struct device *dev) |
5248051b RW |
59 | { |
60 | if (IS_ERR_OR_NULL(dev->pm_domain)) | |
61 | return ERR_PTR(-EINVAL); | |
62 | ||
596ba34b | 63 | return pd_to_genpd(dev->pm_domain); |
5248051b | 64 | } |
f721889f | 65 | |
d5e4cbfe RW |
66 | static int genpd_stop_dev(struct generic_pm_domain *genpd, struct device *dev) |
67 | { | |
0140d8bd RW |
68 | return GENPD_DEV_TIMED_CALLBACK(genpd, int, stop, dev, |
69 | stop_latency_ns, "stop"); | |
d5e4cbfe RW |
70 | } |
71 | ||
72 | static int genpd_start_dev(struct generic_pm_domain *genpd, struct device *dev) | |
73 | { | |
0140d8bd RW |
74 | return GENPD_DEV_TIMED_CALLBACK(genpd, int, start, dev, |
75 | start_latency_ns, "start"); | |
d5e4cbfe RW |
76 | } |
77 | ||
e2e3e4e5 RW |
78 | static int genpd_start_dev_no_timing(struct generic_pm_domain *genpd, |
79 | struct device *dev) | |
80 | { | |
81 | return GENPD_DEV_CALLBACK(genpd, int, start, dev); | |
82 | } | |
83 | ||
c4bb3160 | 84 | static bool genpd_sd_counter_dec(struct generic_pm_domain *genpd) |
f721889f | 85 | { |
c4bb3160 RW |
86 | bool ret = false; |
87 | ||
88 | if (!WARN_ON(atomic_read(&genpd->sd_count) == 0)) | |
89 | ret = !!atomic_dec_and_test(&genpd->sd_count); | |
90 | ||
91 | return ret; | |
92 | } | |
93 | ||
94 | static void genpd_sd_counter_inc(struct generic_pm_domain *genpd) | |
95 | { | |
96 | atomic_inc(&genpd->sd_count); | |
97 | smp_mb__after_atomic_inc(); | |
f721889f RW |
98 | } |
99 | ||
17b75eca RW |
100 | static void genpd_acquire_lock(struct generic_pm_domain *genpd) |
101 | { | |
102 | DEFINE_WAIT(wait); | |
103 | ||
104 | mutex_lock(&genpd->lock); | |
105 | /* | |
106 | * Wait for the domain to transition into either the active, | |
107 | * or the power off state. | |
108 | */ | |
109 | for (;;) { | |
110 | prepare_to_wait(&genpd->status_wait_queue, &wait, | |
111 | TASK_UNINTERRUPTIBLE); | |
c6d22b37 RW |
112 | if (genpd->status == GPD_STATE_ACTIVE |
113 | || genpd->status == GPD_STATE_POWER_OFF) | |
17b75eca RW |
114 | break; |
115 | mutex_unlock(&genpd->lock); | |
116 | ||
117 | schedule(); | |
118 | ||
119 | mutex_lock(&genpd->lock); | |
120 | } | |
121 | finish_wait(&genpd->status_wait_queue, &wait); | |
122 | } | |
123 | ||
124 | static void genpd_release_lock(struct generic_pm_domain *genpd) | |
125 | { | |
126 | mutex_unlock(&genpd->lock); | |
127 | } | |
128 | ||
c6d22b37 RW |
129 | static void genpd_set_active(struct generic_pm_domain *genpd) |
130 | { | |
131 | if (genpd->resume_count == 0) | |
132 | genpd->status = GPD_STATE_ACTIVE; | |
133 | } | |
134 | ||
cbc9ef02 RW |
135 | static void genpd_recalc_cpu_exit_latency(struct generic_pm_domain *genpd) |
136 | { | |
137 | s64 usecs64; | |
138 | ||
139 | if (!genpd->cpu_data) | |
140 | return; | |
141 | ||
142 | usecs64 = genpd->power_on_latency_ns; | |
143 | do_div(usecs64, NSEC_PER_USEC); | |
144 | usecs64 += genpd->cpu_data->saved_exit_latency; | |
145 | genpd->cpu_data->idle_state->exit_latency = usecs64; | |
146 | } | |
147 | ||
5248051b | 148 | /** |
5063ce15 | 149 | * __pm_genpd_poweron - Restore power to a given PM domain and its masters. |
5248051b RW |
150 | * @genpd: PM domain to power up. |
151 | * | |
5063ce15 | 152 | * Restore power to @genpd and all of its masters so that it is possible to |
5248051b RW |
153 | * resume a device belonging to it. |
154 | */ | |
8951ef02 | 155 | static int __pm_genpd_poweron(struct generic_pm_domain *genpd) |
3f241775 | 156 | __releases(&genpd->lock) __acquires(&genpd->lock) |
5248051b | 157 | { |
5063ce15 | 158 | struct gpd_link *link; |
3f241775 | 159 | DEFINE_WAIT(wait); |
5248051b RW |
160 | int ret = 0; |
161 | ||
5063ce15 | 162 | /* If the domain's master is being waited for, we have to wait too. */ |
3f241775 RW |
163 | for (;;) { |
164 | prepare_to_wait(&genpd->status_wait_queue, &wait, | |
165 | TASK_UNINTERRUPTIBLE); | |
17877eb5 | 166 | if (genpd->status != GPD_STATE_WAIT_MASTER) |
3f241775 RW |
167 | break; |
168 | mutex_unlock(&genpd->lock); | |
17b75eca | 169 | |
3f241775 RW |
170 | schedule(); |
171 | ||
172 | mutex_lock(&genpd->lock); | |
173 | } | |
174 | finish_wait(&genpd->status_wait_queue, &wait); | |
9e08cf42 | 175 | |
17b75eca | 176 | if (genpd->status == GPD_STATE_ACTIVE |
596ba34b | 177 | || (genpd->prepared_count > 0 && genpd->suspend_power_off)) |
3f241775 | 178 | return 0; |
5248051b | 179 | |
c6d22b37 RW |
180 | if (genpd->status != GPD_STATE_POWER_OFF) { |
181 | genpd_set_active(genpd); | |
3f241775 | 182 | return 0; |
c6d22b37 RW |
183 | } |
184 | ||
cbc9ef02 RW |
185 | if (genpd->cpu_data) { |
186 | cpuidle_pause_and_lock(); | |
187 | genpd->cpu_data->idle_state->disabled = true; | |
188 | cpuidle_resume_and_unlock(); | |
189 | goto out; | |
190 | } | |
191 | ||
5063ce15 RW |
192 | /* |
193 | * The list is guaranteed not to change while the loop below is being | |
194 | * executed, unless one of the masters' .power_on() callbacks fiddles | |
195 | * with it. | |
196 | */ | |
197 | list_for_each_entry(link, &genpd->slave_links, slave_node) { | |
198 | genpd_sd_counter_inc(link->master); | |
17877eb5 | 199 | genpd->status = GPD_STATE_WAIT_MASTER; |
3c07cbc4 | 200 | |
5248051b | 201 | mutex_unlock(&genpd->lock); |
5248051b | 202 | |
5063ce15 | 203 | ret = pm_genpd_poweron(link->master); |
9e08cf42 RW |
204 | |
205 | mutex_lock(&genpd->lock); | |
206 | ||
3f241775 RW |
207 | /* |
208 | * The "wait for parent" status is guaranteed not to change | |
5063ce15 | 209 | * while the master is powering on. |
3f241775 RW |
210 | */ |
211 | genpd->status = GPD_STATE_POWER_OFF; | |
212 | wake_up_all(&genpd->status_wait_queue); | |
5063ce15 RW |
213 | if (ret) { |
214 | genpd_sd_counter_dec(link->master); | |
9e08cf42 | 215 | goto err; |
5063ce15 | 216 | } |
5248051b RW |
217 | } |
218 | ||
9e08cf42 | 219 | if (genpd->power_on) { |
0140d8bd RW |
220 | ktime_t time_start = ktime_get(); |
221 | s64 elapsed_ns; | |
222 | ||
fe202fde | 223 | ret = genpd->power_on(genpd); |
9e08cf42 RW |
224 | if (ret) |
225 | goto err; | |
0140d8bd RW |
226 | |
227 | elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start)); | |
e84b2c20 | 228 | if (elapsed_ns > genpd->power_on_latency_ns) { |
0140d8bd | 229 | genpd->power_on_latency_ns = elapsed_ns; |
6ff7bb0d | 230 | genpd->max_off_time_changed = true; |
cbc9ef02 | 231 | genpd_recalc_cpu_exit_latency(genpd); |
e84b2c20 RW |
232 | if (genpd->name) |
233 | pr_warning("%s: Power-on latency exceeded, " | |
234 | "new value %lld ns\n", genpd->name, | |
235 | elapsed_ns); | |
236 | } | |
3c07cbc4 | 237 | } |
5248051b | 238 | |
cbc9ef02 | 239 | out: |
9e08cf42 RW |
240 | genpd_set_active(genpd); |
241 | ||
3f241775 | 242 | return 0; |
9e08cf42 RW |
243 | |
244 | err: | |
5063ce15 RW |
245 | list_for_each_entry_continue_reverse(link, &genpd->slave_links, slave_node) |
246 | genpd_sd_counter_dec(link->master); | |
9e08cf42 | 247 | |
3f241775 RW |
248 | return ret; |
249 | } | |
250 | ||
251 | /** | |
5063ce15 | 252 | * pm_genpd_poweron - Restore power to a given PM domain and its masters. |
3f241775 RW |
253 | * @genpd: PM domain to power up. |
254 | */ | |
255 | int pm_genpd_poweron(struct generic_pm_domain *genpd) | |
256 | { | |
257 | int ret; | |
258 | ||
259 | mutex_lock(&genpd->lock); | |
260 | ret = __pm_genpd_poweron(genpd); | |
261 | mutex_unlock(&genpd->lock); | |
262 | return ret; | |
5248051b RW |
263 | } |
264 | ||
265 | #endif /* CONFIG_PM */ | |
266 | ||
267 | #ifdef CONFIG_PM_RUNTIME | |
268 | ||
8e9afafd RW |
269 | static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev) |
270 | { | |
271 | return GENPD_DEV_TIMED_CALLBACK(genpd, int, save_state, dev, | |
272 | save_state_latency_ns, "state save"); | |
273 | } | |
274 | ||
275 | static int genpd_restore_dev(struct generic_pm_domain *genpd, struct device *dev) | |
276 | { | |
277 | return GENPD_DEV_TIMED_CALLBACK(genpd, int, restore_state, dev, | |
278 | restore_state_latency_ns, | |
279 | "state restore"); | |
280 | } | |
281 | ||
6ff7bb0d RW |
282 | static int genpd_dev_pm_qos_notifier(struct notifier_block *nb, |
283 | unsigned long val, void *ptr) | |
284 | { | |
285 | struct generic_pm_domain_data *gpd_data; | |
286 | struct device *dev; | |
287 | ||
288 | gpd_data = container_of(nb, struct generic_pm_domain_data, nb); | |
289 | ||
290 | mutex_lock(&gpd_data->lock); | |
291 | dev = gpd_data->base.dev; | |
292 | if (!dev) { | |
293 | mutex_unlock(&gpd_data->lock); | |
294 | return NOTIFY_DONE; | |
295 | } | |
296 | mutex_unlock(&gpd_data->lock); | |
297 | ||
298 | for (;;) { | |
299 | struct generic_pm_domain *genpd; | |
300 | struct pm_domain_data *pdd; | |
301 | ||
302 | spin_lock_irq(&dev->power.lock); | |
303 | ||
304 | pdd = dev->power.subsys_data ? | |
305 | dev->power.subsys_data->domain_data : NULL; | |
1d5fcfec | 306 | if (pdd && pdd->dev) { |
6ff7bb0d RW |
307 | to_gpd_data(pdd)->td.constraint_changed = true; |
308 | genpd = dev_to_genpd(dev); | |
309 | } else { | |
310 | genpd = ERR_PTR(-ENODATA); | |
311 | } | |
312 | ||
313 | spin_unlock_irq(&dev->power.lock); | |
314 | ||
315 | if (!IS_ERR(genpd)) { | |
316 | mutex_lock(&genpd->lock); | |
317 | genpd->max_off_time_changed = true; | |
318 | mutex_unlock(&genpd->lock); | |
319 | } | |
320 | ||
321 | dev = dev->parent; | |
322 | if (!dev || dev->power.ignore_children) | |
323 | break; | |
324 | } | |
325 | ||
326 | return NOTIFY_DONE; | |
327 | } | |
328 | ||
f721889f RW |
329 | /** |
330 | * __pm_genpd_save_device - Save the pre-suspend state of a device. | |
4605ab65 | 331 | * @pdd: Domain data of the device to save the state of. |
f721889f RW |
332 | * @genpd: PM domain the device belongs to. |
333 | */ | |
4605ab65 | 334 | static int __pm_genpd_save_device(struct pm_domain_data *pdd, |
f721889f | 335 | struct generic_pm_domain *genpd) |
17b75eca | 336 | __releases(&genpd->lock) __acquires(&genpd->lock) |
f721889f | 337 | { |
cd0ea672 | 338 | struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd); |
4605ab65 | 339 | struct device *dev = pdd->dev; |
f721889f RW |
340 | int ret = 0; |
341 | ||
cd0ea672 | 342 | if (gpd_data->need_restore) |
f721889f RW |
343 | return 0; |
344 | ||
17b75eca RW |
345 | mutex_unlock(&genpd->lock); |
346 | ||
ecf00475 RW |
347 | genpd_start_dev(genpd, dev); |
348 | ret = genpd_save_dev(genpd, dev); | |
349 | genpd_stop_dev(genpd, dev); | |
f721889f | 350 | |
17b75eca RW |
351 | mutex_lock(&genpd->lock); |
352 | ||
f721889f | 353 | if (!ret) |
cd0ea672 | 354 | gpd_data->need_restore = true; |
f721889f RW |
355 | |
356 | return ret; | |
357 | } | |
358 | ||
359 | /** | |
360 | * __pm_genpd_restore_device - Restore the pre-suspend state of a device. | |
4605ab65 | 361 | * @pdd: Domain data of the device to restore the state of. |
f721889f RW |
362 | * @genpd: PM domain the device belongs to. |
363 | */ | |
4605ab65 | 364 | static void __pm_genpd_restore_device(struct pm_domain_data *pdd, |
f721889f | 365 | struct generic_pm_domain *genpd) |
17b75eca | 366 | __releases(&genpd->lock) __acquires(&genpd->lock) |
f721889f | 367 | { |
cd0ea672 | 368 | struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd); |
4605ab65 | 369 | struct device *dev = pdd->dev; |
80de3d7f | 370 | bool need_restore = gpd_data->need_restore; |
f721889f | 371 | |
80de3d7f | 372 | gpd_data->need_restore = false; |
17b75eca RW |
373 | mutex_unlock(&genpd->lock); |
374 | ||
ecf00475 | 375 | genpd_start_dev(genpd, dev); |
80de3d7f RW |
376 | if (need_restore) |
377 | genpd_restore_dev(genpd, dev); | |
f721889f | 378 | |
17b75eca | 379 | mutex_lock(&genpd->lock); |
f721889f RW |
380 | } |
381 | ||
c6d22b37 RW |
382 | /** |
383 | * genpd_abort_poweroff - Check if a PM domain power off should be aborted. | |
384 | * @genpd: PM domain to check. | |
385 | * | |
386 | * Return true if a PM domain's status changed to GPD_STATE_ACTIVE during | |
387 | * a "power off" operation, which means that a "power on" has occured in the | |
388 | * meantime, or if its resume_count field is different from zero, which means | |
389 | * that one of its devices has been resumed in the meantime. | |
390 | */ | |
391 | static bool genpd_abort_poweroff(struct generic_pm_domain *genpd) | |
392 | { | |
17877eb5 | 393 | return genpd->status == GPD_STATE_WAIT_MASTER |
3f241775 | 394 | || genpd->status == GPD_STATE_ACTIVE || genpd->resume_count > 0; |
c6d22b37 RW |
395 | } |
396 | ||
56375fd4 RW |
397 | /** |
398 | * genpd_queue_power_off_work - Queue up the execution of pm_genpd_poweroff(). | |
399 | * @genpd: PM domait to power off. | |
400 | * | |
401 | * Queue up the execution of pm_genpd_poweroff() unless it's already been done | |
402 | * before. | |
403 | */ | |
0bc5b2de | 404 | void genpd_queue_power_off_work(struct generic_pm_domain *genpd) |
56375fd4 RW |
405 | { |
406 | if (!work_pending(&genpd->power_off_work)) | |
407 | queue_work(pm_wq, &genpd->power_off_work); | |
408 | } | |
409 | ||
f721889f RW |
410 | /** |
411 | * pm_genpd_poweroff - Remove power from a given PM domain. | |
412 | * @genpd: PM domain to power down. | |
413 | * | |
414 | * If all of the @genpd's devices have been suspended and all of its subdomains | |
415 | * have been powered down, run the runtime suspend callbacks provided by all of | |
416 | * the @genpd's devices' drivers and remove power from @genpd. | |
417 | */ | |
418 | static int pm_genpd_poweroff(struct generic_pm_domain *genpd) | |
17b75eca | 419 | __releases(&genpd->lock) __acquires(&genpd->lock) |
f721889f | 420 | { |
4605ab65 | 421 | struct pm_domain_data *pdd; |
5063ce15 | 422 | struct gpd_link *link; |
f721889f | 423 | unsigned int not_suspended; |
c6d22b37 | 424 | int ret = 0; |
f721889f | 425 | |
c6d22b37 RW |
426 | start: |
427 | /* | |
428 | * Do not try to power off the domain in the following situations: | |
429 | * (1) The domain is already in the "power off" state. | |
5063ce15 | 430 | * (2) The domain is waiting for its master to power up. |
c6d22b37 | 431 | * (3) One of the domain's devices is being resumed right now. |
3f241775 | 432 | * (4) System suspend is in progress. |
c6d22b37 | 433 | */ |
3f241775 | 434 | if (genpd->status == GPD_STATE_POWER_OFF |
17877eb5 | 435 | || genpd->status == GPD_STATE_WAIT_MASTER |
3f241775 | 436 | || genpd->resume_count > 0 || genpd->prepared_count > 0) |
f721889f RW |
437 | return 0; |
438 | ||
c4bb3160 | 439 | if (atomic_read(&genpd->sd_count) > 0) |
f721889f RW |
440 | return -EBUSY; |
441 | ||
442 | not_suspended = 0; | |
4605ab65 | 443 | list_for_each_entry(pdd, &genpd->dev_list, list_node) |
0aa2a221 | 444 | if (pdd->dev->driver && (!pm_runtime_suspended(pdd->dev) |
feb70af0 | 445 | || pdd->dev->power.irq_safe)) |
f721889f RW |
446 | not_suspended++; |
447 | ||
448 | if (not_suspended > genpd->in_progress) | |
449 | return -EBUSY; | |
450 | ||
c6d22b37 RW |
451 | if (genpd->poweroff_task) { |
452 | /* | |
453 | * Another instance of pm_genpd_poweroff() is executing | |
454 | * callbacks, so tell it to start over and return. | |
455 | */ | |
456 | genpd->status = GPD_STATE_REPEAT; | |
457 | return 0; | |
458 | } | |
459 | ||
f721889f RW |
460 | if (genpd->gov && genpd->gov->power_down_ok) { |
461 | if (!genpd->gov->power_down_ok(&genpd->domain)) | |
462 | return -EAGAIN; | |
463 | } | |
464 | ||
17b75eca | 465 | genpd->status = GPD_STATE_BUSY; |
c6d22b37 | 466 | genpd->poweroff_task = current; |
17b75eca | 467 | |
4605ab65 | 468 | list_for_each_entry_reverse(pdd, &genpd->dev_list, list_node) { |
3c07cbc4 | 469 | ret = atomic_read(&genpd->sd_count) == 0 ? |
4605ab65 | 470 | __pm_genpd_save_device(pdd, genpd) : -EBUSY; |
3f241775 RW |
471 | |
472 | if (genpd_abort_poweroff(genpd)) | |
473 | goto out; | |
474 | ||
697a7f37 RW |
475 | if (ret) { |
476 | genpd_set_active(genpd); | |
477 | goto out; | |
478 | } | |
f721889f | 479 | |
c6d22b37 RW |
480 | if (genpd->status == GPD_STATE_REPEAT) { |
481 | genpd->poweroff_task = NULL; | |
482 | goto start; | |
483 | } | |
484 | } | |
17b75eca | 485 | |
cbc9ef02 RW |
486 | if (genpd->cpu_data) { |
487 | /* | |
488 | * If cpu_data is set, cpuidle should turn the domain off when | |
489 | * the CPU in it is idle. In that case we don't decrement the | |
490 | * subdomain counts of the master domains, so that power is not | |
491 | * removed from the current domain prematurely as a result of | |
492 | * cutting off the masters' power. | |
493 | */ | |
494 | genpd->status = GPD_STATE_POWER_OFF; | |
495 | cpuidle_pause_and_lock(); | |
496 | genpd->cpu_data->idle_state->disabled = false; | |
497 | cpuidle_resume_and_unlock(); | |
498 | goto out; | |
499 | } | |
500 | ||
3c07cbc4 | 501 | if (genpd->power_off) { |
0140d8bd RW |
502 | ktime_t time_start; |
503 | s64 elapsed_ns; | |
504 | ||
3c07cbc4 RW |
505 | if (atomic_read(&genpd->sd_count) > 0) { |
506 | ret = -EBUSY; | |
c6d22b37 RW |
507 | goto out; |
508 | } | |
17b75eca | 509 | |
0140d8bd RW |
510 | time_start = ktime_get(); |
511 | ||
3c07cbc4 | 512 | /* |
5063ce15 RW |
513 | * If sd_count > 0 at this point, one of the subdomains hasn't |
514 | * managed to call pm_genpd_poweron() for the master yet after | |
3c07cbc4 RW |
515 | * incrementing it. In that case pm_genpd_poweron() will wait |
516 | * for us to drop the lock, so we can call .power_off() and let | |
517 | * the pm_genpd_poweron() restore power for us (this shouldn't | |
518 | * happen very often). | |
519 | */ | |
d2805402 RW |
520 | ret = genpd->power_off(genpd); |
521 | if (ret == -EBUSY) { | |
522 | genpd_set_active(genpd); | |
d2805402 RW |
523 | goto out; |
524 | } | |
0140d8bd RW |
525 | |
526 | elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start)); | |
e84b2c20 | 527 | if (elapsed_ns > genpd->power_off_latency_ns) { |
0140d8bd | 528 | genpd->power_off_latency_ns = elapsed_ns; |
6ff7bb0d | 529 | genpd->max_off_time_changed = true; |
e84b2c20 RW |
530 | if (genpd->name) |
531 | pr_warning("%s: Power-off latency exceeded, " | |
532 | "new value %lld ns\n", genpd->name, | |
533 | elapsed_ns); | |
534 | } | |
d2805402 | 535 | } |
f721889f | 536 | |
17b75eca | 537 | genpd->status = GPD_STATE_POWER_OFF; |
221e9b58 | 538 | |
5063ce15 RW |
539 | list_for_each_entry(link, &genpd->slave_links, slave_node) { |
540 | genpd_sd_counter_dec(link->master); | |
541 | genpd_queue_power_off_work(link->master); | |
542 | } | |
f721889f | 543 | |
c6d22b37 RW |
544 | out: |
545 | genpd->poweroff_task = NULL; | |
546 | wake_up_all(&genpd->status_wait_queue); | |
547 | return ret; | |
f721889f RW |
548 | } |
549 | ||
550 | /** | |
551 | * genpd_power_off_work_fn - Power off PM domain whose subdomain count is 0. | |
552 | * @work: Work structure used for scheduling the execution of this function. | |
553 | */ | |
554 | static void genpd_power_off_work_fn(struct work_struct *work) | |
555 | { | |
556 | struct generic_pm_domain *genpd; | |
557 | ||
558 | genpd = container_of(work, struct generic_pm_domain, power_off_work); | |
559 | ||
17b75eca | 560 | genpd_acquire_lock(genpd); |
f721889f | 561 | pm_genpd_poweroff(genpd); |
17b75eca | 562 | genpd_release_lock(genpd); |
f721889f RW |
563 | } |
564 | ||
565 | /** | |
566 | * pm_genpd_runtime_suspend - Suspend a device belonging to I/O PM domain. | |
567 | * @dev: Device to suspend. | |
568 | * | |
569 | * Carry out a runtime suspend of a device under the assumption that its | |
570 | * pm_domain field points to the domain member of an object of type | |
571 | * struct generic_pm_domain representing a PM domain consisting of I/O devices. | |
572 | */ | |
573 | static int pm_genpd_runtime_suspend(struct device *dev) | |
574 | { | |
575 | struct generic_pm_domain *genpd; | |
b02c999a | 576 | bool (*stop_ok)(struct device *__dev); |
d5e4cbfe | 577 | int ret; |
f721889f RW |
578 | |
579 | dev_dbg(dev, "%s()\n", __func__); | |
580 | ||
5248051b RW |
581 | genpd = dev_to_genpd(dev); |
582 | if (IS_ERR(genpd)) | |
f721889f RW |
583 | return -EINVAL; |
584 | ||
0aa2a221 RW |
585 | might_sleep_if(!genpd->dev_irq_safe); |
586 | ||
b02c999a RW |
587 | stop_ok = genpd->gov ? genpd->gov->stop_ok : NULL; |
588 | if (stop_ok && !stop_ok(dev)) | |
589 | return -EBUSY; | |
590 | ||
d5e4cbfe RW |
591 | ret = genpd_stop_dev(genpd, dev); |
592 | if (ret) | |
593 | return ret; | |
17b75eca | 594 | |
0aa2a221 RW |
595 | /* |
596 | * If power.irq_safe is set, this routine will be run with interrupts | |
597 | * off, so it can't use mutexes. | |
598 | */ | |
599 | if (dev->power.irq_safe) | |
600 | return 0; | |
601 | ||
c6d22b37 | 602 | mutex_lock(&genpd->lock); |
f721889f RW |
603 | genpd->in_progress++; |
604 | pm_genpd_poweroff(genpd); | |
605 | genpd->in_progress--; | |
c6d22b37 | 606 | mutex_unlock(&genpd->lock); |
f721889f RW |
607 | |
608 | return 0; | |
609 | } | |
610 | ||
f721889f RW |
611 | /** |
612 | * pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain. | |
613 | * @dev: Device to resume. | |
614 | * | |
615 | * Carry out a runtime resume of a device under the assumption that its | |
616 | * pm_domain field points to the domain member of an object of type | |
617 | * struct generic_pm_domain representing a PM domain consisting of I/O devices. | |
618 | */ | |
619 | static int pm_genpd_runtime_resume(struct device *dev) | |
620 | { | |
621 | struct generic_pm_domain *genpd; | |
c6d22b37 | 622 | DEFINE_WAIT(wait); |
f721889f RW |
623 | int ret; |
624 | ||
625 | dev_dbg(dev, "%s()\n", __func__); | |
626 | ||
5248051b RW |
627 | genpd = dev_to_genpd(dev); |
628 | if (IS_ERR(genpd)) | |
f721889f RW |
629 | return -EINVAL; |
630 | ||
0aa2a221 RW |
631 | might_sleep_if(!genpd->dev_irq_safe); |
632 | ||
633 | /* If power.irq_safe, the PM domain is never powered off. */ | |
634 | if (dev->power.irq_safe) | |
e2e3e4e5 | 635 | return genpd_start_dev_no_timing(genpd, dev); |
0aa2a221 | 636 | |
c6d22b37 | 637 | mutex_lock(&genpd->lock); |
3f241775 RW |
638 | ret = __pm_genpd_poweron(genpd); |
639 | if (ret) { | |
640 | mutex_unlock(&genpd->lock); | |
641 | return ret; | |
642 | } | |
17b75eca | 643 | genpd->status = GPD_STATE_BUSY; |
c6d22b37 RW |
644 | genpd->resume_count++; |
645 | for (;;) { | |
646 | prepare_to_wait(&genpd->status_wait_queue, &wait, | |
647 | TASK_UNINTERRUPTIBLE); | |
648 | /* | |
649 | * If current is the powering off task, we have been called | |
650 | * reentrantly from one of the device callbacks, so we should | |
651 | * not wait. | |
652 | */ | |
653 | if (!genpd->poweroff_task || genpd->poweroff_task == current) | |
654 | break; | |
655 | mutex_unlock(&genpd->lock); | |
656 | ||
657 | schedule(); | |
658 | ||
659 | mutex_lock(&genpd->lock); | |
660 | } | |
661 | finish_wait(&genpd->status_wait_queue, &wait); | |
cd0ea672 | 662 | __pm_genpd_restore_device(dev->power.subsys_data->domain_data, genpd); |
c6d22b37 RW |
663 | genpd->resume_count--; |
664 | genpd_set_active(genpd); | |
17b75eca | 665 | wake_up_all(&genpd->status_wait_queue); |
c6d22b37 | 666 | mutex_unlock(&genpd->lock); |
17b75eca | 667 | |
f721889f RW |
668 | return 0; |
669 | } | |
670 | ||
17f2ae7f RW |
671 | /** |
672 | * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use. | |
673 | */ | |
674 | void pm_genpd_poweroff_unused(void) | |
675 | { | |
676 | struct generic_pm_domain *genpd; | |
677 | ||
678 | mutex_lock(&gpd_list_lock); | |
679 | ||
680 | list_for_each_entry(genpd, &gpd_list, gpd_list_node) | |
681 | genpd_queue_power_off_work(genpd); | |
682 | ||
683 | mutex_unlock(&gpd_list_lock); | |
684 | } | |
685 | ||
f721889f RW |
686 | #else |
687 | ||
6ff7bb0d RW |
688 | static inline int genpd_dev_pm_qos_notifier(struct notifier_block *nb, |
689 | unsigned long val, void *ptr) | |
690 | { | |
691 | return NOTIFY_DONE; | |
692 | } | |
693 | ||
f721889f RW |
694 | static inline void genpd_power_off_work_fn(struct work_struct *work) {} |
695 | ||
696 | #define pm_genpd_runtime_suspend NULL | |
697 | #define pm_genpd_runtime_resume NULL | |
698 | ||
699 | #endif /* CONFIG_PM_RUNTIME */ | |
700 | ||
596ba34b RW |
701 | #ifdef CONFIG_PM_SLEEP |
702 | ||
77f827de RW |
703 | /** |
704 | * pm_genpd_present - Check if the given PM domain has been initialized. | |
705 | * @genpd: PM domain to check. | |
706 | */ | |
707 | static bool pm_genpd_present(struct generic_pm_domain *genpd) | |
708 | { | |
709 | struct generic_pm_domain *gpd; | |
710 | ||
711 | if (IS_ERR_OR_NULL(genpd)) | |
712 | return false; | |
713 | ||
714 | list_for_each_entry(gpd, &gpd_list, gpd_list_node) | |
715 | if (gpd == genpd) | |
716 | return true; | |
717 | ||
718 | return false; | |
719 | } | |
720 | ||
d5e4cbfe RW |
721 | static bool genpd_dev_active_wakeup(struct generic_pm_domain *genpd, |
722 | struct device *dev) | |
723 | { | |
724 | return GENPD_DEV_CALLBACK(genpd, bool, active_wakeup, dev); | |
725 | } | |
726 | ||
d23b9b00 RW |
727 | static int genpd_suspend_dev(struct generic_pm_domain *genpd, struct device *dev) |
728 | { | |
729 | return GENPD_DEV_CALLBACK(genpd, int, suspend, dev); | |
730 | } | |
731 | ||
732 | static int genpd_suspend_late(struct generic_pm_domain *genpd, struct device *dev) | |
733 | { | |
734 | return GENPD_DEV_CALLBACK(genpd, int, suspend_late, dev); | |
735 | } | |
736 | ||
737 | static int genpd_resume_early(struct generic_pm_domain *genpd, struct device *dev) | |
738 | { | |
739 | return GENPD_DEV_CALLBACK(genpd, int, resume_early, dev); | |
740 | } | |
741 | ||
742 | static int genpd_resume_dev(struct generic_pm_domain *genpd, struct device *dev) | |
743 | { | |
744 | return GENPD_DEV_CALLBACK(genpd, int, resume, dev); | |
745 | } | |
746 | ||
747 | static int genpd_freeze_dev(struct generic_pm_domain *genpd, struct device *dev) | |
748 | { | |
749 | return GENPD_DEV_CALLBACK(genpd, int, freeze, dev); | |
750 | } | |
751 | ||
752 | static int genpd_freeze_late(struct generic_pm_domain *genpd, struct device *dev) | |
753 | { | |
754 | return GENPD_DEV_CALLBACK(genpd, int, freeze_late, dev); | |
755 | } | |
756 | ||
757 | static int genpd_thaw_early(struct generic_pm_domain *genpd, struct device *dev) | |
758 | { | |
759 | return GENPD_DEV_CALLBACK(genpd, int, thaw_early, dev); | |
760 | } | |
761 | ||
762 | static int genpd_thaw_dev(struct generic_pm_domain *genpd, struct device *dev) | |
763 | { | |
764 | return GENPD_DEV_CALLBACK(genpd, int, thaw, dev); | |
765 | } | |
766 | ||
596ba34b | 767 | /** |
5063ce15 | 768 | * pm_genpd_sync_poweroff - Synchronously power off a PM domain and its masters. |
596ba34b RW |
769 | * @genpd: PM domain to power off, if possible. |
770 | * | |
771 | * Check if the given PM domain can be powered off (during system suspend or | |
5063ce15 | 772 | * hibernation) and do that if so. Also, in that case propagate to its masters. |
596ba34b | 773 | * |
77f827de RW |
774 | * This function is only called in "noirq" and "syscore" stages of system power |
775 | * transitions, so it need not acquire locks (all of the "noirq" callbacks are | |
776 | * executed sequentially, so it is guaranteed that it will never run twice in | |
777 | * parallel). | |
596ba34b RW |
778 | */ |
779 | static void pm_genpd_sync_poweroff(struct generic_pm_domain *genpd) | |
780 | { | |
5063ce15 | 781 | struct gpd_link *link; |
596ba34b | 782 | |
17b75eca | 783 | if (genpd->status == GPD_STATE_POWER_OFF) |
596ba34b RW |
784 | return; |
785 | ||
c4bb3160 RW |
786 | if (genpd->suspended_count != genpd->device_count |
787 | || atomic_read(&genpd->sd_count) > 0) | |
596ba34b RW |
788 | return; |
789 | ||
790 | if (genpd->power_off) | |
791 | genpd->power_off(genpd); | |
792 | ||
17b75eca | 793 | genpd->status = GPD_STATE_POWER_OFF; |
5063ce15 RW |
794 | |
795 | list_for_each_entry(link, &genpd->slave_links, slave_node) { | |
796 | genpd_sd_counter_dec(link->master); | |
797 | pm_genpd_sync_poweroff(link->master); | |
596ba34b RW |
798 | } |
799 | } | |
800 | ||
802d8b49 RW |
801 | /** |
802 | * pm_genpd_sync_poweron - Synchronously power on a PM domain and its masters. | |
803 | * @genpd: PM domain to power on. | |
804 | * | |
77f827de RW |
805 | * This function is only called in "noirq" and "syscore" stages of system power |
806 | * transitions, so it need not acquire locks (all of the "noirq" callbacks are | |
807 | * executed sequentially, so it is guaranteed that it will never run twice in | |
808 | * parallel). | |
802d8b49 RW |
809 | */ |
810 | static void pm_genpd_sync_poweron(struct generic_pm_domain *genpd) | |
811 | { | |
812 | struct gpd_link *link; | |
813 | ||
814 | if (genpd->status != GPD_STATE_POWER_OFF) | |
815 | return; | |
816 | ||
817 | list_for_each_entry(link, &genpd->slave_links, slave_node) { | |
818 | pm_genpd_sync_poweron(link->master); | |
819 | genpd_sd_counter_inc(link->master); | |
820 | } | |
821 | ||
822 | if (genpd->power_on) | |
823 | genpd->power_on(genpd); | |
824 | ||
825 | genpd->status = GPD_STATE_ACTIVE; | |
826 | } | |
827 | ||
4ecd6e65 RW |
828 | /** |
829 | * resume_needed - Check whether to resume a device before system suspend. | |
830 | * @dev: Device to check. | |
831 | * @genpd: PM domain the device belongs to. | |
832 | * | |
833 | * There are two cases in which a device that can wake up the system from sleep | |
834 | * states should be resumed by pm_genpd_prepare(): (1) if the device is enabled | |
835 | * to wake up the system and it has to remain active for this purpose while the | |
836 | * system is in the sleep state and (2) if the device is not enabled to wake up | |
837 | * the system from sleep states and it generally doesn't generate wakeup signals | |
838 | * by itself (those signals are generated on its behalf by other parts of the | |
839 | * system). In the latter case it may be necessary to reconfigure the device's | |
840 | * wakeup settings during system suspend, because it may have been set up to | |
841 | * signal remote wakeup from the system's working state as needed by runtime PM. | |
842 | * Return 'true' in either of the above cases. | |
843 | */ | |
844 | static bool resume_needed(struct device *dev, struct generic_pm_domain *genpd) | |
845 | { | |
846 | bool active_wakeup; | |
847 | ||
848 | if (!device_can_wakeup(dev)) | |
849 | return false; | |
850 | ||
d5e4cbfe | 851 | active_wakeup = genpd_dev_active_wakeup(genpd, dev); |
4ecd6e65 RW |
852 | return device_may_wakeup(dev) ? active_wakeup : !active_wakeup; |
853 | } | |
854 | ||
596ba34b RW |
855 | /** |
856 | * pm_genpd_prepare - Start power transition of a device in a PM domain. | |
857 | * @dev: Device to start the transition of. | |
858 | * | |
859 | * Start a power transition of a device (during a system-wide power transition) | |
860 | * under the assumption that its pm_domain field points to the domain member of | |
861 | * an object of type struct generic_pm_domain representing a PM domain | |
862 | * consisting of I/O devices. | |
863 | */ | |
864 | static int pm_genpd_prepare(struct device *dev) | |
865 | { | |
866 | struct generic_pm_domain *genpd; | |
b6c10c84 | 867 | int ret; |
596ba34b RW |
868 | |
869 | dev_dbg(dev, "%s()\n", __func__); | |
870 | ||
871 | genpd = dev_to_genpd(dev); | |
872 | if (IS_ERR(genpd)) | |
873 | return -EINVAL; | |
874 | ||
17b75eca RW |
875 | /* |
876 | * If a wakeup request is pending for the device, it should be woken up | |
877 | * at this point and a system wakeup event should be reported if it's | |
878 | * set up to wake up the system from sleep states. | |
879 | */ | |
880 | pm_runtime_get_noresume(dev); | |
881 | if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) | |
882 | pm_wakeup_event(dev, 0); | |
883 | ||
884 | if (pm_wakeup_pending()) { | |
885 | pm_runtime_put_sync(dev); | |
886 | return -EBUSY; | |
887 | } | |
888 | ||
4ecd6e65 RW |
889 | if (resume_needed(dev, genpd)) |
890 | pm_runtime_resume(dev); | |
891 | ||
17b75eca | 892 | genpd_acquire_lock(genpd); |
596ba34b | 893 | |
65533bbf RW |
894 | if (genpd->prepared_count++ == 0) { |
895 | genpd->suspended_count = 0; | |
17b75eca | 896 | genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF; |
65533bbf | 897 | } |
17b75eca RW |
898 | |
899 | genpd_release_lock(genpd); | |
596ba34b RW |
900 | |
901 | if (genpd->suspend_power_off) { | |
17b75eca | 902 | pm_runtime_put_noidle(dev); |
596ba34b RW |
903 | return 0; |
904 | } | |
905 | ||
906 | /* | |
17b75eca RW |
907 | * The PM domain must be in the GPD_STATE_ACTIVE state at this point, |
908 | * so pm_genpd_poweron() will return immediately, but if the device | |
d5e4cbfe | 909 | * is suspended (e.g. it's been stopped by genpd_stop_dev()), we need |
17b75eca | 910 | * to make it operational. |
596ba34b | 911 | */ |
17b75eca | 912 | pm_runtime_resume(dev); |
596ba34b RW |
913 | __pm_runtime_disable(dev, false); |
914 | ||
b6c10c84 RW |
915 | ret = pm_generic_prepare(dev); |
916 | if (ret) { | |
917 | mutex_lock(&genpd->lock); | |
918 | ||
919 | if (--genpd->prepared_count == 0) | |
920 | genpd->suspend_power_off = false; | |
921 | ||
922 | mutex_unlock(&genpd->lock); | |
17b75eca | 923 | pm_runtime_enable(dev); |
b6c10c84 | 924 | } |
17b75eca RW |
925 | |
926 | pm_runtime_put_sync(dev); | |
b6c10c84 | 927 | return ret; |
596ba34b RW |
928 | } |
929 | ||
930 | /** | |
931 | * pm_genpd_suspend - Suspend a device belonging to an I/O PM domain. | |
932 | * @dev: Device to suspend. | |
933 | * | |
934 | * Suspend a device under the assumption that its pm_domain field points to the | |
935 | * domain member of an object of type struct generic_pm_domain representing | |
936 | * a PM domain consisting of I/O devices. | |
937 | */ | |
938 | static int pm_genpd_suspend(struct device *dev) | |
939 | { | |
940 | struct generic_pm_domain *genpd; | |
941 | ||
942 | dev_dbg(dev, "%s()\n", __func__); | |
943 | ||
944 | genpd = dev_to_genpd(dev); | |
945 | if (IS_ERR(genpd)) | |
946 | return -EINVAL; | |
947 | ||
d23b9b00 | 948 | return genpd->suspend_power_off ? 0 : genpd_suspend_dev(genpd, dev); |
596ba34b RW |
949 | } |
950 | ||
951 | /** | |
0496c8ae | 952 | * pm_genpd_suspend_late - Late suspend of a device from an I/O PM domain. |
596ba34b RW |
953 | * @dev: Device to suspend. |
954 | * | |
955 | * Carry out a late suspend of a device under the assumption that its | |
956 | * pm_domain field points to the domain member of an object of type | |
957 | * struct generic_pm_domain representing a PM domain consisting of I/O devices. | |
958 | */ | |
0496c8ae | 959 | static int pm_genpd_suspend_late(struct device *dev) |
596ba34b RW |
960 | { |
961 | struct generic_pm_domain *genpd; | |
596ba34b RW |
962 | |
963 | dev_dbg(dev, "%s()\n", __func__); | |
964 | ||
965 | genpd = dev_to_genpd(dev); | |
966 | if (IS_ERR(genpd)) | |
967 | return -EINVAL; | |
968 | ||
0496c8ae RW |
969 | return genpd->suspend_power_off ? 0 : genpd_suspend_late(genpd, dev); |
970 | } | |
596ba34b | 971 | |
0496c8ae RW |
972 | /** |
973 | * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain. | |
974 | * @dev: Device to suspend. | |
975 | * | |
976 | * Stop the device and remove power from the domain if all devices in it have | |
977 | * been stopped. | |
978 | */ | |
979 | static int pm_genpd_suspend_noirq(struct device *dev) | |
980 | { | |
981 | struct generic_pm_domain *genpd; | |
982 | ||
983 | dev_dbg(dev, "%s()\n", __func__); | |
984 | ||
985 | genpd = dev_to_genpd(dev); | |
986 | if (IS_ERR(genpd)) | |
987 | return -EINVAL; | |
596ba34b | 988 | |
dbf37414 | 989 | if (genpd->suspend_power_off |
0496c8ae | 990 | || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))) |
d4f2d87a RW |
991 | return 0; |
992 | ||
d5e4cbfe | 993 | genpd_stop_dev(genpd, dev); |
596ba34b RW |
994 | |
995 | /* | |
996 | * Since all of the "noirq" callbacks are executed sequentially, it is | |
997 | * guaranteed that this function will never run twice in parallel for | |
998 | * the same PM domain, so it is not necessary to use locking here. | |
999 | */ | |
1000 | genpd->suspended_count++; | |
1001 | pm_genpd_sync_poweroff(genpd); | |
1002 | ||
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | /** | |
0496c8ae | 1007 | * pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain. |
596ba34b RW |
1008 | * @dev: Device to resume. |
1009 | * | |
0496c8ae | 1010 | * Restore power to the device's PM domain, if necessary, and start the device. |
596ba34b RW |
1011 | */ |
1012 | static int pm_genpd_resume_noirq(struct device *dev) | |
1013 | { | |
1014 | struct generic_pm_domain *genpd; | |
1015 | ||
1016 | dev_dbg(dev, "%s()\n", __func__); | |
1017 | ||
1018 | genpd = dev_to_genpd(dev); | |
1019 | if (IS_ERR(genpd)) | |
1020 | return -EINVAL; | |
1021 | ||
dbf37414 | 1022 | if (genpd->suspend_power_off |
cc85b207 | 1023 | || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))) |
596ba34b RW |
1024 | return 0; |
1025 | ||
1026 | /* | |
1027 | * Since all of the "noirq" callbacks are executed sequentially, it is | |
1028 | * guaranteed that this function will never run twice in parallel for | |
1029 | * the same PM domain, so it is not necessary to use locking here. | |
1030 | */ | |
802d8b49 | 1031 | pm_genpd_sync_poweron(genpd); |
596ba34b | 1032 | genpd->suspended_count--; |
596ba34b | 1033 | |
0496c8ae | 1034 | return genpd_start_dev(genpd, dev); |
596ba34b RW |
1035 | } |
1036 | ||
1037 | /** | |
0496c8ae RW |
1038 | * pm_genpd_resume_early - Early resume of a device in an I/O PM domain. |
1039 | * @dev: Device to resume. | |
1040 | * | |
1041 | * Carry out an early resume of a device under the assumption that its | |
1042 | * pm_domain field points to the domain member of an object of type | |
1043 | * struct generic_pm_domain representing a power domain consisting of I/O | |
1044 | * devices. | |
1045 | */ | |
1046 | static int pm_genpd_resume_early(struct device *dev) | |
1047 | { | |
1048 | struct generic_pm_domain *genpd; | |
1049 | ||
1050 | dev_dbg(dev, "%s()\n", __func__); | |
1051 | ||
1052 | genpd = dev_to_genpd(dev); | |
1053 | if (IS_ERR(genpd)) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | return genpd->suspend_power_off ? 0 : genpd_resume_early(genpd, dev); | |
1057 | } | |
1058 | ||
1059 | /** | |
1060 | * pm_genpd_resume - Resume of device in an I/O PM domain. | |
596ba34b RW |
1061 | * @dev: Device to resume. |
1062 | * | |
1063 | * Resume a device under the assumption that its pm_domain field points to the | |
1064 | * domain member of an object of type struct generic_pm_domain representing | |
1065 | * a power domain consisting of I/O devices. | |
1066 | */ | |
1067 | static int pm_genpd_resume(struct device *dev) | |
1068 | { | |
1069 | struct generic_pm_domain *genpd; | |
1070 | ||
1071 | dev_dbg(dev, "%s()\n", __func__); | |
1072 | ||
1073 | genpd = dev_to_genpd(dev); | |
1074 | if (IS_ERR(genpd)) | |
1075 | return -EINVAL; | |
1076 | ||
d23b9b00 | 1077 | return genpd->suspend_power_off ? 0 : genpd_resume_dev(genpd, dev); |
596ba34b RW |
1078 | } |
1079 | ||
1080 | /** | |
0496c8ae | 1081 | * pm_genpd_freeze - Freezing a device in an I/O PM domain. |
596ba34b RW |
1082 | * @dev: Device to freeze. |
1083 | * | |
1084 | * Freeze a device under the assumption that its pm_domain field points to the | |
1085 | * domain member of an object of type struct generic_pm_domain representing | |
1086 | * a power domain consisting of I/O devices. | |
1087 | */ | |
1088 | static int pm_genpd_freeze(struct device *dev) | |
1089 | { | |
1090 | struct generic_pm_domain *genpd; | |
1091 | ||
1092 | dev_dbg(dev, "%s()\n", __func__); | |
1093 | ||
1094 | genpd = dev_to_genpd(dev); | |
1095 | if (IS_ERR(genpd)) | |
1096 | return -EINVAL; | |
1097 | ||
d23b9b00 | 1098 | return genpd->suspend_power_off ? 0 : genpd_freeze_dev(genpd, dev); |
596ba34b RW |
1099 | } |
1100 | ||
1101 | /** | |
0496c8ae RW |
1102 | * pm_genpd_freeze_late - Late freeze of a device in an I/O PM domain. |
1103 | * @dev: Device to freeze. | |
1104 | * | |
1105 | * Carry out a late freeze of a device under the assumption that its | |
1106 | * pm_domain field points to the domain member of an object of type | |
1107 | * struct generic_pm_domain representing a power domain consisting of I/O | |
1108 | * devices. | |
1109 | */ | |
1110 | static int pm_genpd_freeze_late(struct device *dev) | |
1111 | { | |
1112 | struct generic_pm_domain *genpd; | |
1113 | ||
1114 | dev_dbg(dev, "%s()\n", __func__); | |
1115 | ||
1116 | genpd = dev_to_genpd(dev); | |
1117 | if (IS_ERR(genpd)) | |
1118 | return -EINVAL; | |
1119 | ||
1120 | return genpd->suspend_power_off ? 0 : genpd_freeze_late(genpd, dev); | |
1121 | } | |
1122 | ||
1123 | /** | |
1124 | * pm_genpd_freeze_noirq - Completion of freezing a device in an I/O PM domain. | |
596ba34b RW |
1125 | * @dev: Device to freeze. |
1126 | * | |
1127 | * Carry out a late freeze of a device under the assumption that its | |
1128 | * pm_domain field points to the domain member of an object of type | |
1129 | * struct generic_pm_domain representing a power domain consisting of I/O | |
1130 | * devices. | |
1131 | */ | |
1132 | static int pm_genpd_freeze_noirq(struct device *dev) | |
1133 | { | |
1134 | struct generic_pm_domain *genpd; | |
596ba34b RW |
1135 | |
1136 | dev_dbg(dev, "%s()\n", __func__); | |
1137 | ||
1138 | genpd = dev_to_genpd(dev); | |
1139 | if (IS_ERR(genpd)) | |
1140 | return -EINVAL; | |
1141 | ||
dbf37414 | 1142 | return genpd->suspend_power_off ? 0 : genpd_stop_dev(genpd, dev); |
0496c8ae | 1143 | } |
596ba34b | 1144 | |
0496c8ae RW |
1145 | /** |
1146 | * pm_genpd_thaw_noirq - Early thaw of device in an I/O PM domain. | |
1147 | * @dev: Device to thaw. | |
1148 | * | |
1149 | * Start the device, unless power has been removed from the domain already | |
1150 | * before the system transition. | |
1151 | */ | |
1152 | static int pm_genpd_thaw_noirq(struct device *dev) | |
1153 | { | |
1154 | struct generic_pm_domain *genpd; | |
596ba34b | 1155 | |
0496c8ae | 1156 | dev_dbg(dev, "%s()\n", __func__); |
596ba34b | 1157 | |
0496c8ae RW |
1158 | genpd = dev_to_genpd(dev); |
1159 | if (IS_ERR(genpd)) | |
1160 | return -EINVAL; | |
1161 | ||
dbf37414 | 1162 | return genpd->suspend_power_off ? 0 : genpd_start_dev(genpd, dev); |
596ba34b RW |
1163 | } |
1164 | ||
1165 | /** | |
0496c8ae | 1166 | * pm_genpd_thaw_early - Early thaw of device in an I/O PM domain. |
596ba34b RW |
1167 | * @dev: Device to thaw. |
1168 | * | |
1169 | * Carry out an early thaw of a device under the assumption that its | |
1170 | * pm_domain field points to the domain member of an object of type | |
1171 | * struct generic_pm_domain representing a power domain consisting of I/O | |
1172 | * devices. | |
1173 | */ | |
0496c8ae | 1174 | static int pm_genpd_thaw_early(struct device *dev) |
596ba34b RW |
1175 | { |
1176 | struct generic_pm_domain *genpd; | |
1177 | ||
1178 | dev_dbg(dev, "%s()\n", __func__); | |
1179 | ||
1180 | genpd = dev_to_genpd(dev); | |
1181 | if (IS_ERR(genpd)) | |
1182 | return -EINVAL; | |
1183 | ||
0496c8ae | 1184 | return genpd->suspend_power_off ? 0 : genpd_thaw_early(genpd, dev); |
596ba34b RW |
1185 | } |
1186 | ||
1187 | /** | |
1188 | * pm_genpd_thaw - Thaw a device belonging to an I/O power domain. | |
1189 | * @dev: Device to thaw. | |
1190 | * | |
1191 | * Thaw a device under the assumption that its pm_domain field points to the | |
1192 | * domain member of an object of type struct generic_pm_domain representing | |
1193 | * a power domain consisting of I/O devices. | |
1194 | */ | |
1195 | static int pm_genpd_thaw(struct device *dev) | |
1196 | { | |
1197 | struct generic_pm_domain *genpd; | |
1198 | ||
1199 | dev_dbg(dev, "%s()\n", __func__); | |
1200 | ||
1201 | genpd = dev_to_genpd(dev); | |
1202 | if (IS_ERR(genpd)) | |
1203 | return -EINVAL; | |
1204 | ||
d23b9b00 | 1205 | return genpd->suspend_power_off ? 0 : genpd_thaw_dev(genpd, dev); |
596ba34b RW |
1206 | } |
1207 | ||
1208 | /** | |
0496c8ae | 1209 | * pm_genpd_restore_noirq - Start of restore of device in an I/O PM domain. |
596ba34b RW |
1210 | * @dev: Device to resume. |
1211 | * | |
0496c8ae RW |
1212 | * Make sure the domain will be in the same power state as before the |
1213 | * hibernation the system is resuming from and start the device if necessary. | |
596ba34b RW |
1214 | */ |
1215 | static int pm_genpd_restore_noirq(struct device *dev) | |
1216 | { | |
1217 | struct generic_pm_domain *genpd; | |
1218 | ||
1219 | dev_dbg(dev, "%s()\n", __func__); | |
1220 | ||
1221 | genpd = dev_to_genpd(dev); | |
1222 | if (IS_ERR(genpd)) | |
1223 | return -EINVAL; | |
1224 | ||
1225 | /* | |
1226 | * Since all of the "noirq" callbacks are executed sequentially, it is | |
1227 | * guaranteed that this function will never run twice in parallel for | |
1228 | * the same PM domain, so it is not necessary to use locking here. | |
65533bbf RW |
1229 | * |
1230 | * At this point suspended_count == 0 means we are being run for the | |
1231 | * first time for the given domain in the present cycle. | |
596ba34b | 1232 | */ |
65533bbf | 1233 | if (genpd->suspended_count++ == 0) { |
596ba34b | 1234 | /* |
65533bbf | 1235 | * The boot kernel might put the domain into arbitrary state, |
802d8b49 RW |
1236 | * so make it appear as powered off to pm_genpd_sync_poweron(), |
1237 | * so that it tries to power it on in case it was really off. | |
596ba34b | 1238 | */ |
65533bbf RW |
1239 | genpd->status = GPD_STATE_POWER_OFF; |
1240 | if (genpd->suspend_power_off) { | |
1241 | /* | |
1242 | * If the domain was off before the hibernation, make | |
1243 | * sure it will be off going forward. | |
1244 | */ | |
1245 | if (genpd->power_off) | |
1246 | genpd->power_off(genpd); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
596ba34b RW |
1250 | } |
1251 | ||
18dd2ece RW |
1252 | if (genpd->suspend_power_off) |
1253 | return 0; | |
1254 | ||
802d8b49 | 1255 | pm_genpd_sync_poweron(genpd); |
596ba34b | 1256 | |
dbf37414 | 1257 | return genpd_start_dev(genpd, dev); |
596ba34b RW |
1258 | } |
1259 | ||
1260 | /** | |
1261 | * pm_genpd_complete - Complete power transition of a device in a power domain. | |
1262 | * @dev: Device to complete the transition of. | |
1263 | * | |
1264 | * Complete a power transition of a device (during a system-wide power | |
1265 | * transition) under the assumption that its pm_domain field points to the | |
1266 | * domain member of an object of type struct generic_pm_domain representing | |
1267 | * a power domain consisting of I/O devices. | |
1268 | */ | |
1269 | static void pm_genpd_complete(struct device *dev) | |
1270 | { | |
1271 | struct generic_pm_domain *genpd; | |
1272 | bool run_complete; | |
1273 | ||
1274 | dev_dbg(dev, "%s()\n", __func__); | |
1275 | ||
1276 | genpd = dev_to_genpd(dev); | |
1277 | if (IS_ERR(genpd)) | |
1278 | return; | |
1279 | ||
1280 | mutex_lock(&genpd->lock); | |
1281 | ||
1282 | run_complete = !genpd->suspend_power_off; | |
1283 | if (--genpd->prepared_count == 0) | |
1284 | genpd->suspend_power_off = false; | |
1285 | ||
1286 | mutex_unlock(&genpd->lock); | |
1287 | ||
1288 | if (run_complete) { | |
1289 | pm_generic_complete(dev); | |
6f00ff78 | 1290 | pm_runtime_set_active(dev); |
596ba34b | 1291 | pm_runtime_enable(dev); |
6f00ff78 | 1292 | pm_runtime_idle(dev); |
596ba34b RW |
1293 | } |
1294 | } | |
1295 | ||
77f827de RW |
1296 | /** |
1297 | * pm_genpd_syscore_switch - Switch power during system core suspend or resume. | |
1298 | * @dev: Device that normally is marked as "always on" to switch power for. | |
1299 | * | |
1300 | * This routine may only be called during the system core (syscore) suspend or | |
1301 | * resume phase for devices whose "always on" flags are set. | |
1302 | */ | |
1303 | void pm_genpd_syscore_switch(struct device *dev, bool suspend) | |
1304 | { | |
1305 | struct generic_pm_domain *genpd; | |
1306 | ||
1307 | genpd = dev_to_genpd(dev); | |
1308 | if (!pm_genpd_present(genpd)) | |
1309 | return; | |
1310 | ||
1311 | if (suspend) { | |
1312 | genpd->suspended_count++; | |
1313 | pm_genpd_sync_poweroff(genpd); | |
1314 | } else { | |
1315 | pm_genpd_sync_poweron(genpd); | |
1316 | genpd->suspended_count--; | |
1317 | } | |
1318 | } | |
1319 | EXPORT_SYMBOL_GPL(pm_genpd_syscore_switch); | |
1320 | ||
596ba34b RW |
1321 | #else |
1322 | ||
1323 | #define pm_genpd_prepare NULL | |
1324 | #define pm_genpd_suspend NULL | |
0496c8ae | 1325 | #define pm_genpd_suspend_late NULL |
596ba34b | 1326 | #define pm_genpd_suspend_noirq NULL |
0496c8ae | 1327 | #define pm_genpd_resume_early NULL |
596ba34b RW |
1328 | #define pm_genpd_resume_noirq NULL |
1329 | #define pm_genpd_resume NULL | |
1330 | #define pm_genpd_freeze NULL | |
0496c8ae | 1331 | #define pm_genpd_freeze_late NULL |
596ba34b | 1332 | #define pm_genpd_freeze_noirq NULL |
0496c8ae | 1333 | #define pm_genpd_thaw_early NULL |
596ba34b RW |
1334 | #define pm_genpd_thaw_noirq NULL |
1335 | #define pm_genpd_thaw NULL | |
596ba34b | 1336 | #define pm_genpd_restore_noirq NULL |
596ba34b RW |
1337 | #define pm_genpd_complete NULL |
1338 | ||
1339 | #endif /* CONFIG_PM_SLEEP */ | |
1340 | ||
1d5fcfec RW |
1341 | static struct generic_pm_domain_data *__pm_genpd_alloc_dev_data(struct device *dev) |
1342 | { | |
1343 | struct generic_pm_domain_data *gpd_data; | |
1344 | ||
1345 | gpd_data = kzalloc(sizeof(*gpd_data), GFP_KERNEL); | |
1346 | if (!gpd_data) | |
1347 | return NULL; | |
1348 | ||
1349 | mutex_init(&gpd_data->lock); | |
1350 | gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier; | |
1351 | dev_pm_qos_add_notifier(dev, &gpd_data->nb); | |
1352 | return gpd_data; | |
1353 | } | |
1354 | ||
1355 | static void __pm_genpd_free_dev_data(struct device *dev, | |
1356 | struct generic_pm_domain_data *gpd_data) | |
1357 | { | |
1358 | dev_pm_qos_remove_notifier(dev, &gpd_data->nb); | |
1359 | kfree(gpd_data); | |
1360 | } | |
1361 | ||
f721889f | 1362 | /** |
b02c999a | 1363 | * __pm_genpd_add_device - Add a device to an I/O PM domain. |
f721889f RW |
1364 | * @genpd: PM domain to add the device to. |
1365 | * @dev: Device to be added. | |
b02c999a | 1366 | * @td: Set of PM QoS timing parameters to attach to the device. |
f721889f | 1367 | */ |
b02c999a RW |
1368 | int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev, |
1369 | struct gpd_timing_data *td) | |
f721889f | 1370 | { |
1d5fcfec | 1371 | struct generic_pm_domain_data *gpd_data_new, *gpd_data = NULL; |
4605ab65 | 1372 | struct pm_domain_data *pdd; |
f721889f RW |
1373 | int ret = 0; |
1374 | ||
1375 | dev_dbg(dev, "%s()\n", __func__); | |
1376 | ||
1377 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev)) | |
1378 | return -EINVAL; | |
1379 | ||
1d5fcfec RW |
1380 | gpd_data_new = __pm_genpd_alloc_dev_data(dev); |
1381 | if (!gpd_data_new) | |
6ff7bb0d RW |
1382 | return -ENOMEM; |
1383 | ||
17b75eca | 1384 | genpd_acquire_lock(genpd); |
f721889f | 1385 | |
596ba34b RW |
1386 | if (genpd->prepared_count > 0) { |
1387 | ret = -EAGAIN; | |
1388 | goto out; | |
1389 | } | |
1390 | ||
4605ab65 RW |
1391 | list_for_each_entry(pdd, &genpd->dev_list, list_node) |
1392 | if (pdd->dev == dev) { | |
f721889f RW |
1393 | ret = -EINVAL; |
1394 | goto out; | |
1395 | } | |
1396 | ||
1d5fcfec RW |
1397 | ret = dev_pm_get_subsys_data(dev); |
1398 | if (ret) | |
1399 | goto out; | |
1400 | ||
596ba34b | 1401 | genpd->device_count++; |
6ff7bb0d | 1402 | genpd->max_off_time_changed = true; |
f721889f | 1403 | |
6ff7bb0d | 1404 | spin_lock_irq(&dev->power.lock); |
1d5fcfec | 1405 | |
6ff7bb0d | 1406 | dev->pm_domain = &genpd->domain; |
1d5fcfec RW |
1407 | if (dev->power.subsys_data->domain_data) { |
1408 | gpd_data = to_gpd_data(dev->power.subsys_data->domain_data); | |
1409 | } else { | |
1410 | gpd_data = gpd_data_new; | |
1411 | dev->power.subsys_data->domain_data = &gpd_data->base; | |
1412 | } | |
1413 | gpd_data->refcount++; | |
b02c999a RW |
1414 | if (td) |
1415 | gpd_data->td = *td; | |
f721889f | 1416 | |
1d5fcfec RW |
1417 | spin_unlock_irq(&dev->power.lock); |
1418 | ||
1419 | mutex_lock(&gpd_data->lock); | |
1420 | gpd_data->base.dev = dev; | |
1421 | list_add_tail(&gpd_data->base.list_node, &genpd->dev_list); | |
1422 | gpd_data->need_restore = genpd->status == GPD_STATE_POWER_OFF; | |
6ff7bb0d RW |
1423 | gpd_data->td.constraint_changed = true; |
1424 | gpd_data->td.effective_constraint_ns = -1; | |
6ff7bb0d RW |
1425 | mutex_unlock(&gpd_data->lock); |
1426 | ||
f721889f | 1427 | out: |
17b75eca | 1428 | genpd_release_lock(genpd); |
f721889f | 1429 | |
1d5fcfec RW |
1430 | if (gpd_data != gpd_data_new) |
1431 | __pm_genpd_free_dev_data(dev, gpd_data_new); | |
1432 | ||
f721889f RW |
1433 | return ret; |
1434 | } | |
1435 | ||
c8aa130b TA |
1436 | /** |
1437 | * __pm_genpd_of_add_device - Add a device to an I/O PM domain. | |
1438 | * @genpd_node: Device tree node pointer representing a PM domain to which the | |
1439 | * the device is added to. | |
1440 | * @dev: Device to be added. | |
1441 | * @td: Set of PM QoS timing parameters to attach to the device. | |
1442 | */ | |
1443 | int __pm_genpd_of_add_device(struct device_node *genpd_node, struct device *dev, | |
1444 | struct gpd_timing_data *td) | |
1445 | { | |
1446 | struct generic_pm_domain *genpd = NULL, *gpd; | |
1447 | ||
1448 | dev_dbg(dev, "%s()\n", __func__); | |
1449 | ||
1450 | if (IS_ERR_OR_NULL(genpd_node) || IS_ERR_OR_NULL(dev)) | |
1451 | return -EINVAL; | |
1452 | ||
1453 | mutex_lock(&gpd_list_lock); | |
1454 | list_for_each_entry(gpd, &gpd_list, gpd_list_node) { | |
1455 | if (gpd->of_node == genpd_node) { | |
1456 | genpd = gpd; | |
1457 | break; | |
1458 | } | |
1459 | } | |
1460 | mutex_unlock(&gpd_list_lock); | |
1461 | ||
1462 | if (!genpd) | |
1463 | return -EINVAL; | |
1464 | ||
1465 | return __pm_genpd_add_device(genpd, dev, td); | |
1466 | } | |
1467 | ||
b5abb085 RW |
1468 | |
1469 | /** | |
1470 | * __pm_genpd_name_add_device - Find I/O PM domain and add a device to it. | |
1471 | * @domain_name: Name of the PM domain to add the device to. | |
1472 | * @dev: Device to be added. | |
1473 | * @td: Set of PM QoS timing parameters to attach to the device. | |
1474 | */ | |
1475 | int __pm_genpd_name_add_device(const char *domain_name, struct device *dev, | |
1476 | struct gpd_timing_data *td) | |
1477 | { | |
1478 | struct generic_pm_domain *genpd = NULL, *gpd; | |
1479 | ||
1480 | if (IS_ERR_OR_NULL(domain_name) || IS_ERR_OR_NULL(dev)) | |
1481 | return -EINVAL; | |
1482 | ||
1483 | mutex_lock(&gpd_list_lock); | |
1484 | list_for_each_entry(gpd, &gpd_list, gpd_list_node) { | |
1485 | if (!strcmp(gpd->name, domain_name)) { | |
1486 | genpd = gpd; | |
1487 | break; | |
1488 | } | |
1489 | } | |
1490 | mutex_unlock(&gpd_list_lock); | |
1491 | ||
1492 | return __pm_genpd_add_device(genpd, dev, td); | |
1493 | } | |
1494 | ||
f721889f RW |
1495 | /** |
1496 | * pm_genpd_remove_device - Remove a device from an I/O PM domain. | |
1497 | * @genpd: PM domain to remove the device from. | |
1498 | * @dev: Device to be removed. | |
1499 | */ | |
1500 | int pm_genpd_remove_device(struct generic_pm_domain *genpd, | |
1501 | struct device *dev) | |
1502 | { | |
6ff7bb0d | 1503 | struct generic_pm_domain_data *gpd_data; |
4605ab65 | 1504 | struct pm_domain_data *pdd; |
1d5fcfec | 1505 | bool remove = false; |
efa69025 | 1506 | int ret = 0; |
f721889f RW |
1507 | |
1508 | dev_dbg(dev, "%s()\n", __func__); | |
1509 | ||
efa69025 RW |
1510 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev) |
1511 | || IS_ERR_OR_NULL(dev->pm_domain) | |
1512 | || pd_to_genpd(dev->pm_domain) != genpd) | |
f721889f RW |
1513 | return -EINVAL; |
1514 | ||
17b75eca | 1515 | genpd_acquire_lock(genpd); |
f721889f | 1516 | |
596ba34b RW |
1517 | if (genpd->prepared_count > 0) { |
1518 | ret = -EAGAIN; | |
1519 | goto out; | |
1520 | } | |
1521 | ||
6ff7bb0d RW |
1522 | genpd->device_count--; |
1523 | genpd->max_off_time_changed = true; | |
1524 | ||
1525 | spin_lock_irq(&dev->power.lock); | |
1d5fcfec | 1526 | |
efa69025 RW |
1527 | dev->pm_domain = NULL; |
1528 | pdd = dev->power.subsys_data->domain_data; | |
1529 | list_del_init(&pdd->list_node); | |
1d5fcfec RW |
1530 | gpd_data = to_gpd_data(pdd); |
1531 | if (--gpd_data->refcount == 0) { | |
1532 | dev->power.subsys_data->domain_data = NULL; | |
1533 | remove = true; | |
1534 | } | |
1535 | ||
6ff7bb0d | 1536 | spin_unlock_irq(&dev->power.lock); |
f721889f | 1537 | |
6ff7bb0d RW |
1538 | mutex_lock(&gpd_data->lock); |
1539 | pdd->dev = NULL; | |
1540 | mutex_unlock(&gpd_data->lock); | |
1541 | ||
1542 | genpd_release_lock(genpd); | |
1543 | ||
6ff7bb0d | 1544 | dev_pm_put_subsys_data(dev); |
1d5fcfec RW |
1545 | if (remove) |
1546 | __pm_genpd_free_dev_data(dev, gpd_data); | |
1547 | ||
6ff7bb0d | 1548 | return 0; |
f721889f | 1549 | |
596ba34b | 1550 | out: |
17b75eca | 1551 | genpd_release_lock(genpd); |
f721889f RW |
1552 | |
1553 | return ret; | |
1554 | } | |
1555 | ||
ca1d72f0 RW |
1556 | /** |
1557 | * pm_genpd_dev_need_restore - Set/unset the device's "need restore" flag. | |
1558 | * @dev: Device to set/unset the flag for. | |
1559 | * @val: The new value of the device's "need restore" flag. | |
1560 | */ | |
1561 | void pm_genpd_dev_need_restore(struct device *dev, bool val) | |
1562 | { | |
1563 | struct pm_subsys_data *psd; | |
1564 | unsigned long flags; | |
1565 | ||
1566 | spin_lock_irqsave(&dev->power.lock, flags); | |
1567 | ||
1568 | psd = dev_to_psd(dev); | |
1569 | if (psd && psd->domain_data) | |
1570 | to_gpd_data(psd->domain_data)->need_restore = val; | |
1571 | ||
1572 | spin_unlock_irqrestore(&dev->power.lock, flags); | |
1573 | } | |
1574 | EXPORT_SYMBOL_GPL(pm_genpd_dev_need_restore); | |
1575 | ||
f721889f RW |
1576 | /** |
1577 | * pm_genpd_add_subdomain - Add a subdomain to an I/O PM domain. | |
1578 | * @genpd: Master PM domain to add the subdomain to. | |
bc0403ff | 1579 | * @subdomain: Subdomain to be added. |
f721889f RW |
1580 | */ |
1581 | int pm_genpd_add_subdomain(struct generic_pm_domain *genpd, | |
bc0403ff | 1582 | struct generic_pm_domain *subdomain) |
f721889f | 1583 | { |
5063ce15 | 1584 | struct gpd_link *link; |
f721889f RW |
1585 | int ret = 0; |
1586 | ||
bc0403ff | 1587 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain)) |
f721889f RW |
1588 | return -EINVAL; |
1589 | ||
17b75eca RW |
1590 | start: |
1591 | genpd_acquire_lock(genpd); | |
bc0403ff | 1592 | mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING); |
f721889f | 1593 | |
bc0403ff RW |
1594 | if (subdomain->status != GPD_STATE_POWER_OFF |
1595 | && subdomain->status != GPD_STATE_ACTIVE) { | |
1596 | mutex_unlock(&subdomain->lock); | |
17b75eca RW |
1597 | genpd_release_lock(genpd); |
1598 | goto start; | |
1599 | } | |
1600 | ||
1601 | if (genpd->status == GPD_STATE_POWER_OFF | |
bc0403ff | 1602 | && subdomain->status != GPD_STATE_POWER_OFF) { |
f721889f RW |
1603 | ret = -EINVAL; |
1604 | goto out; | |
1605 | } | |
1606 | ||
4fcac10d | 1607 | list_for_each_entry(link, &genpd->master_links, master_node) { |
bc0403ff | 1608 | if (link->slave == subdomain && link->master == genpd) { |
f721889f RW |
1609 | ret = -EINVAL; |
1610 | goto out; | |
1611 | } | |
1612 | } | |
1613 | ||
5063ce15 RW |
1614 | link = kzalloc(sizeof(*link), GFP_KERNEL); |
1615 | if (!link) { | |
1616 | ret = -ENOMEM; | |
1617 | goto out; | |
1618 | } | |
1619 | link->master = genpd; | |
1620 | list_add_tail(&link->master_node, &genpd->master_links); | |
bc0403ff RW |
1621 | link->slave = subdomain; |
1622 | list_add_tail(&link->slave_node, &subdomain->slave_links); | |
1623 | if (subdomain->status != GPD_STATE_POWER_OFF) | |
c4bb3160 | 1624 | genpd_sd_counter_inc(genpd); |
f721889f | 1625 | |
f721889f | 1626 | out: |
bc0403ff | 1627 | mutex_unlock(&subdomain->lock); |
17b75eca | 1628 | genpd_release_lock(genpd); |
f721889f RW |
1629 | |
1630 | return ret; | |
1631 | } | |
1632 | ||
1633 | /** | |
1634 | * pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain. | |
1635 | * @genpd: Master PM domain to remove the subdomain from. | |
5063ce15 | 1636 | * @subdomain: Subdomain to be removed. |
f721889f RW |
1637 | */ |
1638 | int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, | |
5063ce15 | 1639 | struct generic_pm_domain *subdomain) |
f721889f | 1640 | { |
5063ce15 | 1641 | struct gpd_link *link; |
f721889f RW |
1642 | int ret = -EINVAL; |
1643 | ||
5063ce15 | 1644 | if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain)) |
f721889f RW |
1645 | return -EINVAL; |
1646 | ||
17b75eca RW |
1647 | start: |
1648 | genpd_acquire_lock(genpd); | |
f721889f | 1649 | |
5063ce15 RW |
1650 | list_for_each_entry(link, &genpd->master_links, master_node) { |
1651 | if (link->slave != subdomain) | |
f721889f RW |
1652 | continue; |
1653 | ||
1654 | mutex_lock_nested(&subdomain->lock, SINGLE_DEPTH_NESTING); | |
1655 | ||
17b75eca RW |
1656 | if (subdomain->status != GPD_STATE_POWER_OFF |
1657 | && subdomain->status != GPD_STATE_ACTIVE) { | |
1658 | mutex_unlock(&subdomain->lock); | |
1659 | genpd_release_lock(genpd); | |
1660 | goto start; | |
1661 | } | |
1662 | ||
5063ce15 RW |
1663 | list_del(&link->master_node); |
1664 | list_del(&link->slave_node); | |
1665 | kfree(link); | |
17b75eca | 1666 | if (subdomain->status != GPD_STATE_POWER_OFF) |
f721889f RW |
1667 | genpd_sd_counter_dec(genpd); |
1668 | ||
1669 | mutex_unlock(&subdomain->lock); | |
1670 | ||
1671 | ret = 0; | |
1672 | break; | |
1673 | } | |
1674 | ||
17b75eca | 1675 | genpd_release_lock(genpd); |
f721889f RW |
1676 | |
1677 | return ret; | |
1678 | } | |
1679 | ||
d5e4cbfe RW |
1680 | /** |
1681 | * pm_genpd_add_callbacks - Add PM domain callbacks to a given device. | |
1682 | * @dev: Device to add the callbacks to. | |
1683 | * @ops: Set of callbacks to add. | |
b02c999a | 1684 | * @td: Timing data to add to the device along with the callbacks (optional). |
62d44902 RW |
1685 | * |
1686 | * Every call to this routine should be balanced with a call to | |
1687 | * __pm_genpd_remove_callbacks() and they must not be nested. | |
d5e4cbfe | 1688 | */ |
b02c999a RW |
1689 | int pm_genpd_add_callbacks(struct device *dev, struct gpd_dev_ops *ops, |
1690 | struct gpd_timing_data *td) | |
d5e4cbfe | 1691 | { |
62d44902 | 1692 | struct generic_pm_domain_data *gpd_data_new, *gpd_data = NULL; |
d5e4cbfe RW |
1693 | int ret = 0; |
1694 | ||
62d44902 | 1695 | if (!(dev && ops)) |
d5e4cbfe RW |
1696 | return -EINVAL; |
1697 | ||
62d44902 RW |
1698 | gpd_data_new = __pm_genpd_alloc_dev_data(dev); |
1699 | if (!gpd_data_new) | |
1700 | return -ENOMEM; | |
1701 | ||
d5e4cbfe RW |
1702 | pm_runtime_disable(dev); |
1703 | device_pm_lock(); | |
1704 | ||
62d44902 RW |
1705 | ret = dev_pm_get_subsys_data(dev); |
1706 | if (ret) | |
1707 | goto out; | |
1708 | ||
1709 | spin_lock_irq(&dev->power.lock); | |
d5e4cbfe | 1710 | |
62d44902 RW |
1711 | if (dev->power.subsys_data->domain_data) { |
1712 | gpd_data = to_gpd_data(dev->power.subsys_data->domain_data); | |
d5e4cbfe | 1713 | } else { |
62d44902 RW |
1714 | gpd_data = gpd_data_new; |
1715 | dev->power.subsys_data->domain_data = &gpd_data->base; | |
d5e4cbfe | 1716 | } |
62d44902 RW |
1717 | gpd_data->refcount++; |
1718 | gpd_data->ops = *ops; | |
1719 | if (td) | |
1720 | gpd_data->td = *td; | |
d5e4cbfe | 1721 | |
62d44902 RW |
1722 | spin_unlock_irq(&dev->power.lock); |
1723 | ||
1724 | out: | |
d5e4cbfe RW |
1725 | device_pm_unlock(); |
1726 | pm_runtime_enable(dev); | |
1727 | ||
62d44902 RW |
1728 | if (gpd_data != gpd_data_new) |
1729 | __pm_genpd_free_dev_data(dev, gpd_data_new); | |
1730 | ||
d5e4cbfe RW |
1731 | return ret; |
1732 | } | |
1733 | EXPORT_SYMBOL_GPL(pm_genpd_add_callbacks); | |
1734 | ||
1735 | /** | |
b02c999a | 1736 | * __pm_genpd_remove_callbacks - Remove PM domain callbacks from a given device. |
d5e4cbfe | 1737 | * @dev: Device to remove the callbacks from. |
b02c999a | 1738 | * @clear_td: If set, clear the device's timing data too. |
62d44902 RW |
1739 | * |
1740 | * This routine can only be called after pm_genpd_add_callbacks(). | |
d5e4cbfe | 1741 | */ |
b02c999a | 1742 | int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td) |
d5e4cbfe | 1743 | { |
62d44902 RW |
1744 | struct generic_pm_domain_data *gpd_data = NULL; |
1745 | bool remove = false; | |
d5e4cbfe RW |
1746 | int ret = 0; |
1747 | ||
1748 | if (!(dev && dev->power.subsys_data)) | |
1749 | return -EINVAL; | |
1750 | ||
1751 | pm_runtime_disable(dev); | |
1752 | device_pm_lock(); | |
1753 | ||
62d44902 | 1754 | spin_lock_irq(&dev->power.lock); |
d5e4cbfe | 1755 | |
62d44902 RW |
1756 | if (dev->power.subsys_data->domain_data) { |
1757 | gpd_data = to_gpd_data(dev->power.subsys_data->domain_data); | |
db79e53d | 1758 | gpd_data->ops = (struct gpd_dev_ops){ NULL }; |
b02c999a RW |
1759 | if (clear_td) |
1760 | gpd_data->td = (struct gpd_timing_data){ 0 }; | |
62d44902 RW |
1761 | |
1762 | if (--gpd_data->refcount == 0) { | |
1763 | dev->power.subsys_data->domain_data = NULL; | |
1764 | remove = true; | |
1765 | } | |
d5e4cbfe RW |
1766 | } else { |
1767 | ret = -EINVAL; | |
1768 | } | |
1769 | ||
62d44902 RW |
1770 | spin_unlock_irq(&dev->power.lock); |
1771 | ||
d5e4cbfe RW |
1772 | device_pm_unlock(); |
1773 | pm_runtime_enable(dev); | |
1774 | ||
62d44902 RW |
1775 | if (ret) |
1776 | return ret; | |
1777 | ||
1778 | dev_pm_put_subsys_data(dev); | |
1779 | if (remove) | |
1780 | __pm_genpd_free_dev_data(dev, gpd_data); | |
1781 | ||
1782 | return 0; | |
d5e4cbfe | 1783 | } |
b02c999a | 1784 | EXPORT_SYMBOL_GPL(__pm_genpd_remove_callbacks); |
d5e4cbfe | 1785 | |
cbc9ef02 RW |
1786 | int genpd_attach_cpuidle(struct generic_pm_domain *genpd, int state) |
1787 | { | |
1788 | struct cpuidle_driver *cpuidle_drv; | |
1789 | struct gpd_cpu_data *cpu_data; | |
1790 | struct cpuidle_state *idle_state; | |
1791 | int ret = 0; | |
1792 | ||
1793 | if (IS_ERR_OR_NULL(genpd) || state < 0) | |
1794 | return -EINVAL; | |
1795 | ||
1796 | genpd_acquire_lock(genpd); | |
1797 | ||
1798 | if (genpd->cpu_data) { | |
1799 | ret = -EEXIST; | |
1800 | goto out; | |
1801 | } | |
1802 | cpu_data = kzalloc(sizeof(*cpu_data), GFP_KERNEL); | |
1803 | if (!cpu_data) { | |
1804 | ret = -ENOMEM; | |
1805 | goto out; | |
1806 | } | |
1807 | cpuidle_drv = cpuidle_driver_ref(); | |
1808 | if (!cpuidle_drv) { | |
1809 | ret = -ENODEV; | |
1810 | goto out; | |
1811 | } | |
1812 | if (cpuidle_drv->state_count <= state) { | |
1813 | ret = -EINVAL; | |
1814 | goto err; | |
1815 | } | |
1816 | idle_state = &cpuidle_drv->states[state]; | |
1817 | if (!idle_state->disabled) { | |
1818 | ret = -EAGAIN; | |
1819 | goto err; | |
1820 | } | |
1821 | cpu_data->idle_state = idle_state; | |
1822 | cpu_data->saved_exit_latency = idle_state->exit_latency; | |
1823 | genpd->cpu_data = cpu_data; | |
1824 | genpd_recalc_cpu_exit_latency(genpd); | |
1825 | ||
1826 | out: | |
1827 | genpd_release_lock(genpd); | |
1828 | return ret; | |
1829 | ||
1830 | err: | |
1831 | cpuidle_driver_unref(); | |
1832 | goto out; | |
1833 | } | |
1834 | ||
1835 | int genpd_detach_cpuidle(struct generic_pm_domain *genpd) | |
1836 | { | |
1837 | struct gpd_cpu_data *cpu_data; | |
1838 | struct cpuidle_state *idle_state; | |
1839 | int ret = 0; | |
1840 | ||
1841 | if (IS_ERR_OR_NULL(genpd)) | |
1842 | return -EINVAL; | |
1843 | ||
1844 | genpd_acquire_lock(genpd); | |
1845 | ||
1846 | cpu_data = genpd->cpu_data; | |
1847 | if (!cpu_data) { | |
1848 | ret = -ENODEV; | |
1849 | goto out; | |
1850 | } | |
1851 | idle_state = cpu_data->idle_state; | |
1852 | if (!idle_state->disabled) { | |
1853 | ret = -EAGAIN; | |
1854 | goto out; | |
1855 | } | |
1856 | idle_state->exit_latency = cpu_data->saved_exit_latency; | |
1857 | cpuidle_driver_unref(); | |
1858 | genpd->cpu_data = NULL; | |
1859 | kfree(cpu_data); | |
1860 | ||
1861 | out: | |
1862 | genpd_release_lock(genpd); | |
1863 | return ret; | |
1864 | } | |
1865 | ||
d23b9b00 RW |
1866 | /* Default device callbacks for generic PM domains. */ |
1867 | ||
ecf00475 RW |
1868 | /** |
1869 | * pm_genpd_default_save_state - Default "save device state" for PM domians. | |
1870 | * @dev: Device to handle. | |
1871 | */ | |
1872 | static int pm_genpd_default_save_state(struct device *dev) | |
1873 | { | |
1874 | int (*cb)(struct device *__dev); | |
ecf00475 RW |
1875 | |
1876 | cb = dev_gpd_data(dev)->ops.save_state; | |
1877 | if (cb) | |
1878 | return cb(dev); | |
1879 | ||
0b589741 RW |
1880 | if (dev->type && dev->type->pm) |
1881 | cb = dev->type->pm->runtime_suspend; | |
1882 | else if (dev->class && dev->class->pm) | |
1883 | cb = dev->class->pm->runtime_suspend; | |
1884 | else if (dev->bus && dev->bus->pm) | |
1885 | cb = dev->bus->pm->runtime_suspend; | |
1886 | else | |
1887 | cb = NULL; | |
ecf00475 | 1888 | |
0b589741 RW |
1889 | if (!cb && dev->driver && dev->driver->pm) |
1890 | cb = dev->driver->pm->runtime_suspend; | |
1891 | ||
1892 | return cb ? cb(dev) : 0; | |
ecf00475 RW |
1893 | } |
1894 | ||
1895 | /** | |
1896 | * pm_genpd_default_restore_state - Default PM domians "restore device state". | |
1897 | * @dev: Device to handle. | |
1898 | */ | |
1899 | static int pm_genpd_default_restore_state(struct device *dev) | |
1900 | { | |
1901 | int (*cb)(struct device *__dev); | |
ecf00475 RW |
1902 | |
1903 | cb = dev_gpd_data(dev)->ops.restore_state; | |
1904 | if (cb) | |
1905 | return cb(dev); | |
1906 | ||
0b589741 RW |
1907 | if (dev->type && dev->type->pm) |
1908 | cb = dev->type->pm->runtime_resume; | |
1909 | else if (dev->class && dev->class->pm) | |
1910 | cb = dev->class->pm->runtime_resume; | |
1911 | else if (dev->bus && dev->bus->pm) | |
1912 | cb = dev->bus->pm->runtime_resume; | |
1913 | else | |
1914 | cb = NULL; | |
ecf00475 | 1915 | |
0b589741 RW |
1916 | if (!cb && dev->driver && dev->driver->pm) |
1917 | cb = dev->driver->pm->runtime_resume; | |
1918 | ||
1919 | return cb ? cb(dev) : 0; | |
ecf00475 RW |
1920 | } |
1921 | ||
0f1d6986 RW |
1922 | #ifdef CONFIG_PM_SLEEP |
1923 | ||
d23b9b00 RW |
1924 | /** |
1925 | * pm_genpd_default_suspend - Default "device suspend" for PM domians. | |
1926 | * @dev: Device to handle. | |
1927 | */ | |
1928 | static int pm_genpd_default_suspend(struct device *dev) | |
1929 | { | |
c9914854 | 1930 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.suspend; |
d23b9b00 RW |
1931 | |
1932 | return cb ? cb(dev) : pm_generic_suspend(dev); | |
1933 | } | |
1934 | ||
1935 | /** | |
1936 | * pm_genpd_default_suspend_late - Default "late device suspend" for PM domians. | |
1937 | * @dev: Device to handle. | |
1938 | */ | |
1939 | static int pm_genpd_default_suspend_late(struct device *dev) | |
1940 | { | |
c9914854 | 1941 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.suspend_late; |
d23b9b00 | 1942 | |
0496c8ae | 1943 | return cb ? cb(dev) : pm_generic_suspend_late(dev); |
d23b9b00 RW |
1944 | } |
1945 | ||
1946 | /** | |
1947 | * pm_genpd_default_resume_early - Default "early device resume" for PM domians. | |
1948 | * @dev: Device to handle. | |
1949 | */ | |
1950 | static int pm_genpd_default_resume_early(struct device *dev) | |
1951 | { | |
c9914854 | 1952 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.resume_early; |
d23b9b00 | 1953 | |
0496c8ae | 1954 | return cb ? cb(dev) : pm_generic_resume_early(dev); |
d23b9b00 RW |
1955 | } |
1956 | ||
1957 | /** | |
1958 | * pm_genpd_default_resume - Default "device resume" for PM domians. | |
1959 | * @dev: Device to handle. | |
1960 | */ | |
1961 | static int pm_genpd_default_resume(struct device *dev) | |
1962 | { | |
c9914854 | 1963 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.resume; |
d23b9b00 RW |
1964 | |
1965 | return cb ? cb(dev) : pm_generic_resume(dev); | |
1966 | } | |
1967 | ||
1968 | /** | |
1969 | * pm_genpd_default_freeze - Default "device freeze" for PM domians. | |
1970 | * @dev: Device to handle. | |
1971 | */ | |
1972 | static int pm_genpd_default_freeze(struct device *dev) | |
1973 | { | |
1974 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.freeze; | |
1975 | ||
1976 | return cb ? cb(dev) : pm_generic_freeze(dev); | |
1977 | } | |
1978 | ||
1979 | /** | |
1980 | * pm_genpd_default_freeze_late - Default "late device freeze" for PM domians. | |
1981 | * @dev: Device to handle. | |
1982 | */ | |
1983 | static int pm_genpd_default_freeze_late(struct device *dev) | |
1984 | { | |
1985 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.freeze_late; | |
1986 | ||
0496c8ae | 1987 | return cb ? cb(dev) : pm_generic_freeze_late(dev); |
d23b9b00 RW |
1988 | } |
1989 | ||
1990 | /** | |
1991 | * pm_genpd_default_thaw_early - Default "early device thaw" for PM domians. | |
1992 | * @dev: Device to handle. | |
1993 | */ | |
1994 | static int pm_genpd_default_thaw_early(struct device *dev) | |
1995 | { | |
1996 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.thaw_early; | |
1997 | ||
0496c8ae | 1998 | return cb ? cb(dev) : pm_generic_thaw_early(dev); |
d23b9b00 RW |
1999 | } |
2000 | ||
2001 | /** | |
2002 | * pm_genpd_default_thaw - Default "device thaw" for PM domians. | |
2003 | * @dev: Device to handle. | |
2004 | */ | |
2005 | static int pm_genpd_default_thaw(struct device *dev) | |
2006 | { | |
2007 | int (*cb)(struct device *__dev) = dev_gpd_data(dev)->ops.thaw; | |
2008 | ||
2009 | return cb ? cb(dev) : pm_generic_thaw(dev); | |
2010 | } | |
2011 | ||
0f1d6986 RW |
2012 | #else /* !CONFIG_PM_SLEEP */ |
2013 | ||
2014 | #define pm_genpd_default_suspend NULL | |
2015 | #define pm_genpd_default_suspend_late NULL | |
2016 | #define pm_genpd_default_resume_early NULL | |
2017 | #define pm_genpd_default_resume NULL | |
2018 | #define pm_genpd_default_freeze NULL | |
2019 | #define pm_genpd_default_freeze_late NULL | |
2020 | #define pm_genpd_default_thaw_early NULL | |
2021 | #define pm_genpd_default_thaw NULL | |
2022 | ||
2023 | #endif /* !CONFIG_PM_SLEEP */ | |
2024 | ||
f721889f RW |
2025 | /** |
2026 | * pm_genpd_init - Initialize a generic I/O PM domain object. | |
2027 | * @genpd: PM domain object to initialize. | |
2028 | * @gov: PM domain governor to associate with the domain (may be NULL). | |
2029 | * @is_off: Initial value of the domain's power_is_off field. | |
2030 | */ | |
2031 | void pm_genpd_init(struct generic_pm_domain *genpd, | |
2032 | struct dev_power_governor *gov, bool is_off) | |
2033 | { | |
2034 | if (IS_ERR_OR_NULL(genpd)) | |
2035 | return; | |
2036 | ||
5063ce15 RW |
2037 | INIT_LIST_HEAD(&genpd->master_links); |
2038 | INIT_LIST_HEAD(&genpd->slave_links); | |
f721889f | 2039 | INIT_LIST_HEAD(&genpd->dev_list); |
f721889f RW |
2040 | mutex_init(&genpd->lock); |
2041 | genpd->gov = gov; | |
2042 | INIT_WORK(&genpd->power_off_work, genpd_power_off_work_fn); | |
2043 | genpd->in_progress = 0; | |
c4bb3160 | 2044 | atomic_set(&genpd->sd_count, 0); |
17b75eca RW |
2045 | genpd->status = is_off ? GPD_STATE_POWER_OFF : GPD_STATE_ACTIVE; |
2046 | init_waitqueue_head(&genpd->status_wait_queue); | |
c6d22b37 RW |
2047 | genpd->poweroff_task = NULL; |
2048 | genpd->resume_count = 0; | |
596ba34b | 2049 | genpd->device_count = 0; |
221e9b58 | 2050 | genpd->max_off_time_ns = -1; |
6ff7bb0d | 2051 | genpd->max_off_time_changed = true; |
f721889f RW |
2052 | genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend; |
2053 | genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume; | |
2054 | genpd->domain.ops.runtime_idle = pm_generic_runtime_idle; | |
596ba34b RW |
2055 | genpd->domain.ops.prepare = pm_genpd_prepare; |
2056 | genpd->domain.ops.suspend = pm_genpd_suspend; | |
0496c8ae | 2057 | genpd->domain.ops.suspend_late = pm_genpd_suspend_late; |
596ba34b RW |
2058 | genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq; |
2059 | genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq; | |
0496c8ae | 2060 | genpd->domain.ops.resume_early = pm_genpd_resume_early; |
596ba34b RW |
2061 | genpd->domain.ops.resume = pm_genpd_resume; |
2062 | genpd->domain.ops.freeze = pm_genpd_freeze; | |
0496c8ae | 2063 | genpd->domain.ops.freeze_late = pm_genpd_freeze_late; |
596ba34b RW |
2064 | genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq; |
2065 | genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq; | |
0496c8ae | 2066 | genpd->domain.ops.thaw_early = pm_genpd_thaw_early; |
596ba34b | 2067 | genpd->domain.ops.thaw = pm_genpd_thaw; |
d23b9b00 | 2068 | genpd->domain.ops.poweroff = pm_genpd_suspend; |
0496c8ae | 2069 | genpd->domain.ops.poweroff_late = pm_genpd_suspend_late; |
d23b9b00 | 2070 | genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq; |
596ba34b | 2071 | genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; |
0496c8ae | 2072 | genpd->domain.ops.restore_early = pm_genpd_resume_early; |
d23b9b00 | 2073 | genpd->domain.ops.restore = pm_genpd_resume; |
596ba34b | 2074 | genpd->domain.ops.complete = pm_genpd_complete; |
ecf00475 RW |
2075 | genpd->dev_ops.save_state = pm_genpd_default_save_state; |
2076 | genpd->dev_ops.restore_state = pm_genpd_default_restore_state; | |
c9914854 RW |
2077 | genpd->dev_ops.suspend = pm_genpd_default_suspend; |
2078 | genpd->dev_ops.suspend_late = pm_genpd_default_suspend_late; | |
2079 | genpd->dev_ops.resume_early = pm_genpd_default_resume_early; | |
2080 | genpd->dev_ops.resume = pm_genpd_default_resume; | |
d23b9b00 RW |
2081 | genpd->dev_ops.freeze = pm_genpd_default_freeze; |
2082 | genpd->dev_ops.freeze_late = pm_genpd_default_freeze_late; | |
2083 | genpd->dev_ops.thaw_early = pm_genpd_default_thaw_early; | |
2084 | genpd->dev_ops.thaw = pm_genpd_default_thaw; | |
5125bbf3 RW |
2085 | mutex_lock(&gpd_list_lock); |
2086 | list_add(&genpd->gpd_list_node, &gpd_list); | |
2087 | mutex_unlock(&gpd_list_lock); | |
2088 | } |