drivers/acpi/device_pm.c

501  * acpi_dev_power_state_for_wake - Deepest power state for wakeup signaling
544 	if (adev->wakeup.flags.notifier_present) {
545 		pm_wakeup_ws_event(adev->wakeup.ws, 0, acpi_s2idle_wakeup());
546 		if (adev->wakeup.context.func) {
548 					  adev->wakeup.context.func,
549 					  dev_name(adev->wakeup.context.dev));
550 			adev->wakeup.context.func(&adev->wakeup.context);
562  * @dev: Device to generate a wakeup event for while handling the notification.
565  * NOTE: @adev need not be a run-wake or wakeup device to be a valid source of
566  * PM wakeup events.  For example, wakeup events may be generated for bridges
567  * if one of the devices below the bridge is signaling wakeup, even if the
568  * bridge itself doesn't have a wakeup GPE associated with it.
580 	if (adev->wakeup.flags.notifier_present)
589 	adev->wakeup.ws = wakeup_source_register(&adev->dev,
591 	adev->wakeup.context.dev = dev;
592 	adev->wakeup.context.func = func;
593 	adev->wakeup.flags.notifier_present = true;
611 	if (!adev->wakeup.flags.notifier_present)
621 	adev->wakeup.context.func = NULL;
622 	adev->wakeup.context.dev = NULL;
623 	wakeup_source_unregister(adev->wakeup.ws);
624 	adev->wakeup.flags.notifier_present = false;
636 	return device && device->wakeup.flags.valid;
675 	bool wakeup = false;
682 	 * wakeup, in which case the return value of _S0W has to be used as the
720 		wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid
721 			&& adev->wakeup.sleep_state >= target_state;
735 		wakeup = true;
738 		wakeup = adev->wakeup.flags.valid;
744 	 * wakeup-aware driver if wake is set).  Still, if _SxW exists
748 	if (wakeup) {
834  * acpi_pm_notify_work_func - ACPI devices wakeup notification work function.
835  * @context: Device wakeup context.
852 	struct acpi_device_wakeup *wakeup = &adev->wakeup;
859 	 * If the device wakeup power is already enabled, disable it and enable
864 	if (wakeup->enable_count > 0)
869 		if (wakeup->enable_count > 0) {
870 			acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number);
871 			wakeup->enable_count = 0;
876 	if (wakeup->enable_count > 0)
879 	status = acpi_enable_gpe(wakeup->gpe_device, wakeup->gpe_number);
886 	acpi_handle_debug(adev->handle, "GPE%2X enabled for wakeup\n",
887 			  (unsigned int)wakeup->gpe_number);
890 	if (wakeup->enable_count < INT_MAX)
891 		wakeup->enable_count++;
901  * acpi_device_wakeup_enable - Enable wakeup functionality for device.
902  * @adev: ACPI device to enable wakeup functionality for.
905  * Enable the GPE associated with @adev so that it can generate wakeup signals
906  * for the device in response to external (remote) events and enable wakeup
918  * acpi_device_wakeup_disable - Disable wakeup functionality for device.
919  * @adev: ACPI device to disable wakeup functionality for.
921  * Disable the GPE associated with @adev and disable wakeup power for it.
928 	struct acpi_device_wakeup *wakeup = &adev->wakeup;
932 	if (!wakeup->enable_count)
935 	acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number);
938 	wakeup->enable_count--;
945  * acpi_pm_set_device_wakeup - Enable/disable remote wakeup for given device.
946  * @dev: Device to enable/disable to generate wakeup events.
947  * @enable: Whether to enable or disable the wakeup functionality.
1008  * @wakeup: Whether or not to enable wakeup for the device.
1011  * mechanism.  Set up remote wakeup if desired, choose the state to put the
1012  * device into (this checks if remote wakeup is expected to work too), and set
1015 int acpi_dev_suspend(struct device *dev, bool wakeup)
1024 	if (wakeup && acpi_device_can_wakeup(adev)) {
1029 		wakeup = false;
1033 	if (error && wakeup)
1045  * mechanism.  Set the power state of the device to ACPI D0 and disable wakeup.
1097 	if (!pm_runtime_suspended(dev) || !adev || (adev->wakeup.flags.valid &&
1098 	    device_may_wakeup(dev) != !!adev->wakeup.prepare_count))
1208 	 * to check whether or not the device's wakeup settings are good for
1392  * Remove the device from the general ACPI PM domain and remove its wakeup
1427  * attached to it, install a wakeup notification handler for the device and