2 * drivers/base/power/sysfs.c - sysfs entries for device PM
5 #include <linux/device.h>
6 #include <linux/string.h>
7 #include <linux/export.h>
8 #include <linux/pm_qos.h>
9 #include <linux/pm_runtime.h>
10 #include <linux/atomic.h>
11 #include <linux/jiffies.h>
15 * control - Report/change current runtime PM setting of the device
17 * Runtime power management of a device can be blocked with the help of
18 * this attribute. All devices have one of the following two values for
19 * the power/control file:
21 * + "auto\n" to allow the device to be power managed at run time;
22 * + "on\n" to prevent the device from being power managed at run time;
24 * The default for all devices is "auto", which means that devices may be
25 * subject to automatic power management, depending on their drivers.
26 * Changing this attribute to "on" prevents the driver from power managing
27 * the device at run time. Doing that while the device is suspended causes
30 * wakeup - Report/change current wakeup option for device
32 * Some devices support "wakeup" events, which are hardware signals
33 * used to activate devices from suspended or low power states. Such
34 * devices have one of three values for the sysfs power/wakeup file:
36 * + "enabled\n" to issue the events;
37 * + "disabled\n" not to do so; or
38 * + "\n" for temporary or permanent inability to issue wakeup.
40 * (For example, unconfigured USB devices can't issue wakeups.)
42 * Familiar examples of devices that can issue wakeup events include
43 * keyboards and mice (both PS2 and USB styles), power buttons, modems,
44 * "Wake-On-LAN" Ethernet links, GPIO lines, and more. Some events
45 * will wake the entire system from a suspend state; others may just
46 * wake up the device (if the system as a whole is already active).
47 * Some wakeup events use normal IRQ lines; other use special out
50 * It is the responsibility of device drivers to enable (or disable)
51 * wakeup signaling as part of changing device power states, respecting
52 * the policy choices provided through the driver model.
54 * Devices may not be able to generate wakeup events from all power
55 * states. Also, the events may be ignored in some configurations;
56 * for example, they might need help from other devices that aren't
57 * active, or which may have wakeup disabled. Some drivers rely on
58 * wakeup events internally (unless they are disabled), keeping
59 * their hardware in low power modes whenever they're unused. This
60 * saves runtime power, without requiring system-wide sleep states.
62 * async - Report/change current async suspend setting for the device
64 * Asynchronous suspend and resume of the device during system-wide power
65 * state transitions can be enabled by writing "enabled" to this file.
66 * Analogously, if "disabled" is written to this file, the device will be
67 * suspended and resumed synchronously.
69 * All devices have one of the following two values for power/async:
71 * + "enabled\n" to permit the asynchronous suspend/resume of the device;
72 * + "disabled\n" to forbid it;
74 * NOTE: It generally is unsafe to permit the asynchronous suspend/resume
75 * of a device unless it is certain that all of the PM dependencies of the
76 * device are known to the PM core. However, for some devices this
77 * attribute is set to "enabled" by bus type code or device drivers and in
78 * that cases it should be safe to leave the default value.
80 * autosuspend_delay_ms - Report/change a device's autosuspend_delay value
82 * Some drivers don't want to carry out a runtime suspend as soon as a
83 * device becomes idle; they want it always to remain idle for some period
84 * of time before suspending it. This period is the autosuspend_delay
85 * value (expressed in milliseconds) and it can be controlled by the user.
86 * If the value is negative then the device will never be runtime
89 * NOTE: The autosuspend_delay_ms attribute and the autosuspend_delay
90 * value are used only if the driver calls pm_runtime_use_autosuspend().
92 * wakeup_count - Report the number of wakeup events related to the device
95 const char power_group_name
[] = "power";
96 EXPORT_SYMBOL_GPL(power_group_name
);
98 static const char ctrl_auto
[] = "auto";
99 static const char ctrl_on
[] = "on";
101 static ssize_t
control_show(struct device
*dev
, struct device_attribute
*attr
,
104 return sprintf(buf
, "%s\n",
105 dev
->power
.runtime_auto
? ctrl_auto
: ctrl_on
);
108 static ssize_t
control_store(struct device
* dev
, struct device_attribute
*attr
,
109 const char * buf
, size_t n
)
114 cp
= memchr(buf
, '\n', n
);
118 if (len
== sizeof ctrl_auto
- 1 && strncmp(buf
, ctrl_auto
, len
) == 0)
119 pm_runtime_allow(dev
);
120 else if (len
== sizeof ctrl_on
- 1 && strncmp(buf
, ctrl_on
, len
) == 0)
121 pm_runtime_forbid(dev
);
128 static DEVICE_ATTR(control
, 0644, control_show
, control_store
);
130 static ssize_t
rtpm_active_time_show(struct device
*dev
,
131 struct device_attribute
*attr
, char *buf
)
134 spin_lock_irq(&dev
->power
.lock
);
135 update_pm_runtime_accounting(dev
);
136 ret
= sprintf(buf
, "%i\n", jiffies_to_msecs(dev
->power
.active_jiffies
));
137 spin_unlock_irq(&dev
->power
.lock
);
141 static DEVICE_ATTR(runtime_active_time
, 0444, rtpm_active_time_show
, NULL
);
143 static ssize_t
rtpm_suspended_time_show(struct device
*dev
,
144 struct device_attribute
*attr
, char *buf
)
147 spin_lock_irq(&dev
->power
.lock
);
148 update_pm_runtime_accounting(dev
);
149 ret
= sprintf(buf
, "%i\n",
150 jiffies_to_msecs(dev
->power
.suspended_jiffies
));
151 spin_unlock_irq(&dev
->power
.lock
);
155 static DEVICE_ATTR(runtime_suspended_time
, 0444, rtpm_suspended_time_show
, NULL
);
157 static ssize_t
rtpm_status_show(struct device
*dev
,
158 struct device_attribute
*attr
, char *buf
)
162 if (dev
->power
.runtime_error
) {
164 } else if (dev
->power
.disable_depth
) {
167 switch (dev
->power
.runtime_status
) {
184 return sprintf(buf
, p
);
187 static DEVICE_ATTR(runtime_status
, 0444, rtpm_status_show
, NULL
);
189 static ssize_t
autosuspend_delay_ms_show(struct device
*dev
,
190 struct device_attribute
*attr
, char *buf
)
192 if (!dev
->power
.use_autosuspend
)
194 return sprintf(buf
, "%d\n", dev
->power
.autosuspend_delay
);
197 static ssize_t
autosuspend_delay_ms_store(struct device
*dev
,
198 struct device_attribute
*attr
, const char *buf
, size_t n
)
202 if (!dev
->power
.use_autosuspend
)
205 if (kstrtol(buf
, 10, &delay
) != 0 || delay
!= (int) delay
)
209 pm_runtime_set_autosuspend_delay(dev
, delay
);
214 static DEVICE_ATTR(autosuspend_delay_ms
, 0644, autosuspend_delay_ms_show
,
215 autosuspend_delay_ms_store
);
217 static ssize_t
pm_qos_resume_latency_show(struct device
*dev
,
218 struct device_attribute
*attr
,
221 s32 value
= dev_pm_qos_requested_resume_latency(dev
);
224 return sprintf(buf
, "n/a\n");
225 else if (value
== PM_QOS_RESUME_LATENCY_NO_CONSTRAINT
)
228 return sprintf(buf
, "%d\n", value
);
231 static ssize_t
pm_qos_resume_latency_store(struct device
*dev
,
232 struct device_attribute
*attr
,
233 const char *buf
, size_t n
)
238 if (!kstrtos32(buf
, 0, &value
)) {
240 * Prevent users from writing negative or "no constraint" values
243 if (value
< 0 || value
== PM_QOS_RESUME_LATENCY_NO_CONSTRAINT
)
247 value
= PM_QOS_RESUME_LATENCY_NO_CONSTRAINT
;
248 } else if (!strcmp(buf
, "n/a") || !strcmp(buf
, "n/a\n")) {
254 ret
= dev_pm_qos_update_request(dev
->power
.qos
->resume_latency_req
,
256 return ret
< 0 ? ret
: n
;
259 static DEVICE_ATTR(pm_qos_resume_latency_us
, 0644,
260 pm_qos_resume_latency_show
, pm_qos_resume_latency_store
);
262 static ssize_t
pm_qos_latency_tolerance_show(struct device
*dev
,
263 struct device_attribute
*attr
,
266 s32 value
= dev_pm_qos_get_user_latency_tolerance(dev
);
269 return sprintf(buf
, "auto\n");
270 else if (value
== PM_QOS_LATENCY_ANY
)
271 return sprintf(buf
, "any\n");
273 return sprintf(buf
, "%d\n", value
);
276 static ssize_t
pm_qos_latency_tolerance_store(struct device
*dev
,
277 struct device_attribute
*attr
,
278 const char *buf
, size_t n
)
283 if (kstrtos32(buf
, 0, &value
) == 0) {
284 /* Users can't write negative values directly */
288 if (!strcmp(buf
, "auto") || !strcmp(buf
, "auto\n"))
289 value
= PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT
;
290 else if (!strcmp(buf
, "any") || !strcmp(buf
, "any\n"))
291 value
= PM_QOS_LATENCY_ANY
;
295 ret
= dev_pm_qos_update_user_latency_tolerance(dev
, value
);
296 return ret
< 0 ? ret
: n
;
299 static DEVICE_ATTR(pm_qos_latency_tolerance_us
, 0644,
300 pm_qos_latency_tolerance_show
, pm_qos_latency_tolerance_store
);
302 static ssize_t
pm_qos_no_power_off_show(struct device
*dev
,
303 struct device_attribute
*attr
,
306 return sprintf(buf
, "%d\n", !!(dev_pm_qos_requested_flags(dev
)
307 & PM_QOS_FLAG_NO_POWER_OFF
));
310 static ssize_t
pm_qos_no_power_off_store(struct device
*dev
,
311 struct device_attribute
*attr
,
312 const char *buf
, size_t n
)
316 if (kstrtoint(buf
, 0, &ret
))
319 if (ret
!= 0 && ret
!= 1)
322 ret
= dev_pm_qos_update_flags(dev
, PM_QOS_FLAG_NO_POWER_OFF
, ret
);
323 return ret
< 0 ? ret
: n
;
326 static DEVICE_ATTR(pm_qos_no_power_off
, 0644,
327 pm_qos_no_power_off_show
, pm_qos_no_power_off_store
);
329 #ifdef CONFIG_PM_SLEEP
330 static const char _enabled
[] = "enabled";
331 static const char _disabled
[] = "disabled";
334 wake_show(struct device
* dev
, struct device_attribute
*attr
, char * buf
)
336 return sprintf(buf
, "%s\n", device_can_wakeup(dev
)
337 ? (device_may_wakeup(dev
) ? _enabled
: _disabled
)
342 wake_store(struct device
* dev
, struct device_attribute
*attr
,
343 const char * buf
, size_t n
)
348 if (!device_can_wakeup(dev
))
351 cp
= memchr(buf
, '\n', n
);
354 if (len
== sizeof _enabled
- 1
355 && strncmp(buf
, _enabled
, sizeof _enabled
- 1) == 0)
356 device_set_wakeup_enable(dev
, 1);
357 else if (len
== sizeof _disabled
- 1
358 && strncmp(buf
, _disabled
, sizeof _disabled
- 1) == 0)
359 device_set_wakeup_enable(dev
, 0);
365 static DEVICE_ATTR(wakeup
, 0644, wake_show
, wake_store
);
367 static ssize_t
wakeup_count_show(struct device
*dev
,
368 struct device_attribute
*attr
, char *buf
)
370 unsigned long count
= 0;
371 bool enabled
= false;
373 spin_lock_irq(&dev
->power
.lock
);
374 if (dev
->power
.wakeup
) {
375 count
= dev
->power
.wakeup
->event_count
;
378 spin_unlock_irq(&dev
->power
.lock
);
379 return enabled
? sprintf(buf
, "%lu\n", count
) : sprintf(buf
, "\n");
382 static DEVICE_ATTR(wakeup_count
, 0444, wakeup_count_show
, NULL
);
384 static ssize_t
wakeup_active_count_show(struct device
*dev
,
385 struct device_attribute
*attr
, char *buf
)
387 unsigned long count
= 0;
388 bool enabled
= false;
390 spin_lock_irq(&dev
->power
.lock
);
391 if (dev
->power
.wakeup
) {
392 count
= dev
->power
.wakeup
->active_count
;
395 spin_unlock_irq(&dev
->power
.lock
);
396 return enabled
? sprintf(buf
, "%lu\n", count
) : sprintf(buf
, "\n");
399 static DEVICE_ATTR(wakeup_active_count
, 0444, wakeup_active_count_show
, NULL
);
401 static ssize_t
wakeup_abort_count_show(struct device
*dev
,
402 struct device_attribute
*attr
,
405 unsigned long count
= 0;
406 bool enabled
= false;
408 spin_lock_irq(&dev
->power
.lock
);
409 if (dev
->power
.wakeup
) {
410 count
= dev
->power
.wakeup
->wakeup_count
;
413 spin_unlock_irq(&dev
->power
.lock
);
414 return enabled
? sprintf(buf
, "%lu\n", count
) : sprintf(buf
, "\n");
417 static DEVICE_ATTR(wakeup_abort_count
, 0444, wakeup_abort_count_show
, NULL
);
419 static ssize_t
wakeup_expire_count_show(struct device
*dev
,
420 struct device_attribute
*attr
,
423 unsigned long count
= 0;
424 bool enabled
= false;
426 spin_lock_irq(&dev
->power
.lock
);
427 if (dev
->power
.wakeup
) {
428 count
= dev
->power
.wakeup
->expire_count
;
431 spin_unlock_irq(&dev
->power
.lock
);
432 return enabled
? sprintf(buf
, "%lu\n", count
) : sprintf(buf
, "\n");
435 static DEVICE_ATTR(wakeup_expire_count
, 0444, wakeup_expire_count_show
, NULL
);
437 static ssize_t
wakeup_active_show(struct device
*dev
,
438 struct device_attribute
*attr
, char *buf
)
440 unsigned int active
= 0;
441 bool enabled
= false;
443 spin_lock_irq(&dev
->power
.lock
);
444 if (dev
->power
.wakeup
) {
445 active
= dev
->power
.wakeup
->active
;
448 spin_unlock_irq(&dev
->power
.lock
);
449 return enabled
? sprintf(buf
, "%u\n", active
) : sprintf(buf
, "\n");
452 static DEVICE_ATTR(wakeup_active
, 0444, wakeup_active_show
, NULL
);
454 static ssize_t
wakeup_total_time_show(struct device
*dev
,
455 struct device_attribute
*attr
, char *buf
)
458 bool enabled
= false;
460 spin_lock_irq(&dev
->power
.lock
);
461 if (dev
->power
.wakeup
) {
462 msec
= ktime_to_ms(dev
->power
.wakeup
->total_time
);
465 spin_unlock_irq(&dev
->power
.lock
);
466 return enabled
? sprintf(buf
, "%lld\n", msec
) : sprintf(buf
, "\n");
469 static DEVICE_ATTR(wakeup_total_time_ms
, 0444, wakeup_total_time_show
, NULL
);
471 static ssize_t
wakeup_max_time_show(struct device
*dev
,
472 struct device_attribute
*attr
, char *buf
)
475 bool enabled
= false;
477 spin_lock_irq(&dev
->power
.lock
);
478 if (dev
->power
.wakeup
) {
479 msec
= ktime_to_ms(dev
->power
.wakeup
->max_time
);
482 spin_unlock_irq(&dev
->power
.lock
);
483 return enabled
? sprintf(buf
, "%lld\n", msec
) : sprintf(buf
, "\n");
486 static DEVICE_ATTR(wakeup_max_time_ms
, 0444, wakeup_max_time_show
, NULL
);
488 static ssize_t
wakeup_last_time_show(struct device
*dev
,
489 struct device_attribute
*attr
, char *buf
)
492 bool enabled
= false;
494 spin_lock_irq(&dev
->power
.lock
);
495 if (dev
->power
.wakeup
) {
496 msec
= ktime_to_ms(dev
->power
.wakeup
->last_time
);
499 spin_unlock_irq(&dev
->power
.lock
);
500 return enabled
? sprintf(buf
, "%lld\n", msec
) : sprintf(buf
, "\n");
503 static DEVICE_ATTR(wakeup_last_time_ms
, 0444, wakeup_last_time_show
, NULL
);
505 #ifdef CONFIG_PM_AUTOSLEEP
506 static ssize_t
wakeup_prevent_sleep_time_show(struct device
*dev
,
507 struct device_attribute
*attr
,
511 bool enabled
= false;
513 spin_lock_irq(&dev
->power
.lock
);
514 if (dev
->power
.wakeup
) {
515 msec
= ktime_to_ms(dev
->power
.wakeup
->prevent_sleep_time
);
518 spin_unlock_irq(&dev
->power
.lock
);
519 return enabled
? sprintf(buf
, "%lld\n", msec
) : sprintf(buf
, "\n");
522 static DEVICE_ATTR(wakeup_prevent_sleep_time_ms
, 0444,
523 wakeup_prevent_sleep_time_show
, NULL
);
524 #endif /* CONFIG_PM_AUTOSLEEP */
525 #endif /* CONFIG_PM_SLEEP */
527 #ifdef CONFIG_PM_ADVANCED_DEBUG
528 static ssize_t
rtpm_usagecount_show(struct device
*dev
,
529 struct device_attribute
*attr
, char *buf
)
531 return sprintf(buf
, "%d\n", atomic_read(&dev
->power
.usage_count
));
534 static ssize_t
rtpm_children_show(struct device
*dev
,
535 struct device_attribute
*attr
, char *buf
)
537 return sprintf(buf
, "%d\n", dev
->power
.ignore_children
?
538 0 : atomic_read(&dev
->power
.child_count
));
541 static ssize_t
rtpm_enabled_show(struct device
*dev
,
542 struct device_attribute
*attr
, char *buf
)
544 if ((dev
->power
.disable_depth
) && (dev
->power
.runtime_auto
== false))
545 return sprintf(buf
, "disabled & forbidden\n");
546 else if (dev
->power
.disable_depth
)
547 return sprintf(buf
, "disabled\n");
548 else if (dev
->power
.runtime_auto
== false)
549 return sprintf(buf
, "forbidden\n");
550 return sprintf(buf
, "enabled\n");
553 static DEVICE_ATTR(runtime_usage
, 0444, rtpm_usagecount_show
, NULL
);
554 static DEVICE_ATTR(runtime_active_kids
, 0444, rtpm_children_show
, NULL
);
555 static DEVICE_ATTR(runtime_enabled
, 0444, rtpm_enabled_show
, NULL
);
557 #ifdef CONFIG_PM_SLEEP
558 static ssize_t
async_show(struct device
*dev
, struct device_attribute
*attr
,
561 return sprintf(buf
, "%s\n",
562 device_async_suspend_enabled(dev
) ?
563 _enabled
: _disabled
);
566 static ssize_t
async_store(struct device
*dev
, struct device_attribute
*attr
,
567 const char *buf
, size_t n
)
572 cp
= memchr(buf
, '\n', n
);
575 if (len
== sizeof _enabled
- 1 && strncmp(buf
, _enabled
, len
) == 0)
576 device_enable_async_suspend(dev
);
577 else if (len
== sizeof _disabled
- 1 &&
578 strncmp(buf
, _disabled
, len
) == 0)
579 device_disable_async_suspend(dev
);
585 static DEVICE_ATTR(async
, 0644, async_show
, async_store
);
587 #endif /* CONFIG_PM_SLEEP */
588 #endif /* CONFIG_PM_ADVANCED_DEBUG */
590 static struct attribute
*power_attrs
[] = {
591 #ifdef CONFIG_PM_ADVANCED_DEBUG
592 #ifdef CONFIG_PM_SLEEP
593 &dev_attr_async
.attr
,
595 &dev_attr_runtime_status
.attr
,
596 &dev_attr_runtime_usage
.attr
,
597 &dev_attr_runtime_active_kids
.attr
,
598 &dev_attr_runtime_enabled
.attr
,
599 #endif /* CONFIG_PM_ADVANCED_DEBUG */
602 static const struct attribute_group pm_attr_group
= {
603 .name
= power_group_name
,
604 .attrs
= power_attrs
,
607 static struct attribute
*wakeup_attrs
[] = {
608 #ifdef CONFIG_PM_SLEEP
609 &dev_attr_wakeup
.attr
,
610 &dev_attr_wakeup_count
.attr
,
611 &dev_attr_wakeup_active_count
.attr
,
612 &dev_attr_wakeup_abort_count
.attr
,
613 &dev_attr_wakeup_expire_count
.attr
,
614 &dev_attr_wakeup_active
.attr
,
615 &dev_attr_wakeup_total_time_ms
.attr
,
616 &dev_attr_wakeup_max_time_ms
.attr
,
617 &dev_attr_wakeup_last_time_ms
.attr
,
618 #ifdef CONFIG_PM_AUTOSLEEP
619 &dev_attr_wakeup_prevent_sleep_time_ms
.attr
,
624 static const struct attribute_group pm_wakeup_attr_group
= {
625 .name
= power_group_name
,
626 .attrs
= wakeup_attrs
,
629 static struct attribute
*runtime_attrs
[] = {
630 #ifndef CONFIG_PM_ADVANCED_DEBUG
631 &dev_attr_runtime_status
.attr
,
633 &dev_attr_control
.attr
,
634 &dev_attr_runtime_suspended_time
.attr
,
635 &dev_attr_runtime_active_time
.attr
,
636 &dev_attr_autosuspend_delay_ms
.attr
,
639 static const struct attribute_group pm_runtime_attr_group
= {
640 .name
= power_group_name
,
641 .attrs
= runtime_attrs
,
644 static struct attribute
*pm_qos_resume_latency_attrs
[] = {
645 &dev_attr_pm_qos_resume_latency_us
.attr
,
648 static const struct attribute_group pm_qos_resume_latency_attr_group
= {
649 .name
= power_group_name
,
650 .attrs
= pm_qos_resume_latency_attrs
,
653 static struct attribute
*pm_qos_latency_tolerance_attrs
[] = {
654 &dev_attr_pm_qos_latency_tolerance_us
.attr
,
657 static const struct attribute_group pm_qos_latency_tolerance_attr_group
= {
658 .name
= power_group_name
,
659 .attrs
= pm_qos_latency_tolerance_attrs
,
662 static struct attribute
*pm_qos_flags_attrs
[] = {
663 &dev_attr_pm_qos_no_power_off
.attr
,
666 static const struct attribute_group pm_qos_flags_attr_group
= {
667 .name
= power_group_name
,
668 .attrs
= pm_qos_flags_attrs
,
671 int dpm_sysfs_add(struct device
*dev
)
675 rc
= sysfs_create_group(&dev
->kobj
, &pm_attr_group
);
679 if (pm_runtime_callbacks_present(dev
)) {
680 rc
= sysfs_merge_group(&dev
->kobj
, &pm_runtime_attr_group
);
684 if (device_can_wakeup(dev
)) {
685 rc
= sysfs_merge_group(&dev
->kobj
, &pm_wakeup_attr_group
);
689 if (dev
->power
.set_latency_tolerance
) {
690 rc
= sysfs_merge_group(&dev
->kobj
,
691 &pm_qos_latency_tolerance_attr_group
);
698 sysfs_unmerge_group(&dev
->kobj
, &pm_wakeup_attr_group
);
700 sysfs_unmerge_group(&dev
->kobj
, &pm_runtime_attr_group
);
702 sysfs_remove_group(&dev
->kobj
, &pm_attr_group
);
706 int wakeup_sysfs_add(struct device
*dev
)
708 return sysfs_merge_group(&dev
->kobj
, &pm_wakeup_attr_group
);
711 void wakeup_sysfs_remove(struct device
*dev
)
713 sysfs_unmerge_group(&dev
->kobj
, &pm_wakeup_attr_group
);
716 int pm_qos_sysfs_add_resume_latency(struct device
*dev
)
718 return sysfs_merge_group(&dev
->kobj
, &pm_qos_resume_latency_attr_group
);
721 void pm_qos_sysfs_remove_resume_latency(struct device
*dev
)
723 sysfs_unmerge_group(&dev
->kobj
, &pm_qos_resume_latency_attr_group
);
726 int pm_qos_sysfs_add_flags(struct device
*dev
)
728 return sysfs_merge_group(&dev
->kobj
, &pm_qos_flags_attr_group
);
731 void pm_qos_sysfs_remove_flags(struct device
*dev
)
733 sysfs_unmerge_group(&dev
->kobj
, &pm_qos_flags_attr_group
);
736 int pm_qos_sysfs_add_latency_tolerance(struct device
*dev
)
738 return sysfs_merge_group(&dev
->kobj
,
739 &pm_qos_latency_tolerance_attr_group
);
742 void pm_qos_sysfs_remove_latency_tolerance(struct device
*dev
)
744 sysfs_unmerge_group(&dev
->kobj
, &pm_qos_latency_tolerance_attr_group
);
747 void rpm_sysfs_remove(struct device
*dev
)
749 sysfs_unmerge_group(&dev
->kobj
, &pm_runtime_attr_group
);
752 void dpm_sysfs_remove(struct device
*dev
)
754 sysfs_unmerge_group(&dev
->kobj
, &pm_qos_latency_tolerance_attr_group
);
755 dev_pm_qos_constraints_destroy(dev
);
756 rpm_sysfs_remove(dev
);
757 sysfs_unmerge_group(&dev
->kobj
, &pm_wakeup_attr_group
);
758 sysfs_remove_group(&dev
->kobj
, &pm_attr_group
);