1 // SPDX-License-Identifier: GPL-2.0
15  *	control - Report/change current runtime PM setting of the device
30  *	wakeup - Report/change current wakeup option for device
32  *	Some devices support "wakeup" events, which are hardware signals
34  *	devices have one of three values for the sysfs power/wakeup file:
38  *	 + "\n" for temporary or permanent inability to issue wakeup.
42  *	Familiar examples of devices that can issue wakeup events include
44  *	"Wake-On-LAN" Ethernet links, GPIO lines, and more.  Some events
47  *	Some wakeup events use normal IRQ lines; other use special out
51  *	wakeup signaling as part of changing device power states, respecting
54  *	Devices may not be able to generate wakeup events from all power
57  *	active, or which may have wakeup disabled.  Some drivers rely on
58  *	wakeup events internally (unless they are disabled), keeping
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
80  *	autosuspend_delay_ms - Report/change a device's autosuspend_delay value
92  *	wakeup_count - Report the number of wakeup events related to the device
105 			  dev->power.runtime_auto ? ctrl_auto : ctrl_on);  in control_show()
117 		n = -EINVAL;  in control_store()
155 	if (dev->power.runtime_error) {  in runtime_status_show()
157 	} else if (dev->power.disable_depth) {  in runtime_status_show()
160 		switch (dev->power.runtime_status) {  in runtime_status_show()
174 			return -EIO;  in runtime_status_show()
186 	if (!dev->power.use_autosuspend)  in autosuspend_delay_ms_show()
187 		return -EIO;  in autosuspend_delay_ms_show()
189 	return sysfs_emit(buf, "%d\n", dev->power.autosuspend_delay);  in autosuspend_delay_ms_show()
195 	long delay;  in autosuspend_delay_ms_store()  local
197 	if (!dev->power.use_autosuspend)  in autosuspend_delay_ms_store()
198 		return -EIO;  in autosuspend_delay_ms_store()
200 	if (kstrtol(buf, 10, &delay) != 0 || delay != (int) delay)  in autosuspend_delay_ms_store()
201 		return -EINVAL;  in autosuspend_delay_ms_store()
204 	pm_runtime_set_autosuspend_delay(dev, delay);  in autosuspend_delay_ms_store()
238 			return -EINVAL;  in pm_qos_resume_latency_us_store()
245 		return -EINVAL;  in pm_qos_resume_latency_us_store()
248 	ret = dev_pm_qos_update_request(dev->power.qos->resume_latency_req,  in pm_qos_resume_latency_us_store()
279 			return -EINVAL;  in pm_qos_latency_tolerance_us_store()
286 			return -EINVAL;  in pm_qos_latency_tolerance_us_store()
309 		return -EINVAL;  in pm_qos_no_power_off_store()
312 		return -EINVAL;  in pm_qos_no_power_off_store()
336 		return -EINVAL;  in wakeup_store()
343 		return -EINVAL;  in wakeup_store()
347 static DEVICE_ATTR_RW(wakeup);
355 	spin_lock_irq(&dev->power.lock);  in wakeup_count_show()
356 	if (dev->power.wakeup) {  in wakeup_count_show()
357 		count = dev->power.wakeup->wakeup_count;  in wakeup_count_show()
360 	spin_unlock_irq(&dev->power.lock);  in wakeup_count_show()
376 	spin_lock_irq(&dev->power.lock);  in wakeup_active_count_show()
377 	if (dev->power.wakeup) {  in wakeup_active_count_show()
378 		count = dev->power.wakeup->active_count;  in wakeup_active_count_show()
381 	spin_unlock_irq(&dev->power.lock);  in wakeup_active_count_show()
397 	spin_lock_irq(&dev->power.lock);  in wakeup_abort_count_show()
398 	if (dev->power.wakeup) {  in wakeup_abort_count_show()
399 		count = dev->power.wakeup->wakeup_count;  in wakeup_abort_count_show()
402 	spin_unlock_irq(&dev->power.lock);  in wakeup_abort_count_show()
418 	spin_lock_irq(&dev->power.lock);  in wakeup_expire_count_show()
419 	if (dev->power.wakeup) {  in wakeup_expire_count_show()
420 		count = dev->power.wakeup->expire_count;  in wakeup_expire_count_show()
423 	spin_unlock_irq(&dev->power.lock);  in wakeup_expire_count_show()
438 	spin_lock_irq(&dev->power.lock);  in wakeup_active_show()
439 	if (dev->power.wakeup) {  in wakeup_active_show()
440 		active = dev->power.wakeup->active;  in wakeup_active_show()
443 	spin_unlock_irq(&dev->power.lock);  in wakeup_active_show()
459 	spin_lock_irq(&dev->power.lock);  in wakeup_total_time_ms_show()
460 	if (dev->power.wakeup) {  in wakeup_total_time_ms_show()
461 		msec = ktime_to_ms(dev->power.wakeup->total_time);  in wakeup_total_time_ms_show()
464 	spin_unlock_irq(&dev->power.lock);  in wakeup_total_time_ms_show()
479 	spin_lock_irq(&dev->power.lock);  in wakeup_max_time_ms_show()
480 	if (dev->power.wakeup) {  in wakeup_max_time_ms_show()
481 		msec = ktime_to_ms(dev->power.wakeup->max_time);  in wakeup_max_time_ms_show()
484 	spin_unlock_irq(&dev->power.lock);  in wakeup_max_time_ms_show()
500 	spin_lock_irq(&dev->power.lock);  in wakeup_last_time_ms_show()
501 	if (dev->power.wakeup) {  in wakeup_last_time_ms_show()
502 		msec = ktime_to_ms(dev->power.wakeup->last_time);  in wakeup_last_time_ms_show()
505 	spin_unlock_irq(&dev->power.lock);  in wakeup_last_time_ms_show()
515 	if (dev->power.wakeup && dev->power.wakeup->dev)  in dpm_sysfs_wakeup_change_owner()
516 		return device_change_owner(dev->power.wakeup->dev, kuid, kgid);  in dpm_sysfs_wakeup_change_owner()
530 	spin_lock_irq(&dev->power.lock);  in wakeup_prevent_sleep_time_ms_show()
531 	if (dev->power.wakeup) {  in wakeup_prevent_sleep_time_ms_show()
532 		msec = ktime_to_ms(dev->power.wakeup->prevent_sleep_time);  in wakeup_prevent_sleep_time_ms_show()
535 	spin_unlock_irq(&dev->power.lock);  in wakeup_prevent_sleep_time_ms_show()
556 	return sysfs_emit(buf, "%d\n", atomic_read(&dev->power.usage_count));  in runtime_usage_show()
564 	return sysfs_emit(buf, "%d\n", dev->power.ignore_children ?  in runtime_active_kids_show()
565 			  0 : atomic_read(&dev->power.child_count));  in runtime_active_kids_show()
574 	if (dev->power.disable_depth && !dev->power.runtime_auto)  in runtime_enabled_show()
576 	else if (dev->power.disable_depth)  in runtime_enabled_show()
578 	else if (!dev->power.runtime_auto)  in runtime_enabled_show()
604 		return -EINVAL;  in async_store()
702 	rc = sysfs_create_group(&dev->kobj, &pm_attr_group);  in dpm_sysfs_add()
707 		rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group);  in dpm_sysfs_add()
712 		rc = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group);  in dpm_sysfs_add()
716 	if (dev->power.set_latency_tolerance) {  in dpm_sysfs_add()
717 		rc = sysfs_merge_group(&dev->kobj,  in dpm_sysfs_add()
728 	sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);  in dpm_sysfs_add()
730 	sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);  in dpm_sysfs_add()
732 	sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group);  in dpm_sysfs_add()
734 	sysfs_remove_group(&dev->kobj, &pm_attr_group);  in dpm_sysfs_add()
745 	rc = sysfs_group_change_owner(&dev->kobj, &pm_attr_group, kuid, kgid);  in dpm_sysfs_change_owner()
751 			&dev->kobj, &pm_runtime_attr_group, kuid, kgid);  in dpm_sysfs_change_owner()
757 		rc = sysfs_group_change_owner(&dev->kobj, &pm_wakeup_attr_group,  in dpm_sysfs_change_owner()
767 	if (dev->power.set_latency_tolerance) {  in dpm_sysfs_change_owner()
769 			&dev->kobj, &pm_qos_latency_tolerance_attr_group, kuid,  in dpm_sysfs_change_owner()
779 	int ret = sysfs_merge_group(&dev->kobj, &pm_wakeup_attr_group);  in wakeup_sysfs_add()
782 		kobject_uevent(&dev->kobj, KOBJ_CHANGE);  in wakeup_sysfs_add()
789 	sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);  in wakeup_sysfs_remove()
790 	kobject_uevent(&dev->kobj, KOBJ_CHANGE);  in wakeup_sysfs_remove()
795 	return sysfs_merge_group(&dev->kobj, &pm_qos_resume_latency_attr_group);  in pm_qos_sysfs_add_resume_latency()
800 	sysfs_unmerge_group(&dev->kobj, &pm_qos_resume_latency_attr_group);  in pm_qos_sysfs_remove_resume_latency()
805 	return sysfs_merge_group(&dev->kobj, &pm_qos_flags_attr_group);  in pm_qos_sysfs_add_flags()
810 	sysfs_unmerge_group(&dev->kobj, &pm_qos_flags_attr_group);  in pm_qos_sysfs_remove_flags()
815 	return sysfs_merge_group(&dev->kobj,  in pm_qos_sysfs_add_latency_tolerance()
821 	sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);  in pm_qos_sysfs_remove_latency_tolerance()
826 	sysfs_unmerge_group(&dev->kobj, &pm_runtime_attr_group);  in rpm_sysfs_remove()
833 	sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);  in dpm_sysfs_remove()
836 	sysfs_unmerge_group(&dev->kobj, &pm_wakeup_attr_group);  in dpm_sysfs_remove()
837 	sysfs_remove_group(&dev->kobj, &pm_attr_group);  in dpm_sysfs_remove()