Commit c12f07d1 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

ACPICA: Add new GPE public interface - acpi_mark_gpe_for_wake. 



ACPICA commit c49dbfed2bc069d0038ea7e1294409bfde7c2c8c

Some potential callers of acpi_setup_gpe_for_wake may know in advance that
there won't be any notify handlers installed for device wake notifications
from the given GPE (one example is a button GPE in Linux). For these cases,
acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake.
This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
setup implicit wake notification for it (since there's no handler method).
Rafael Wysocki.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
parent b9ca3d7b

drivers/acpi/acpica/evxfgpe.c

+47 −0
Original line number Diff line number Diff line
@@ -185,6 +185,53 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) 
ACPI_EXPORT_SYMBOL(acpi_disable_gpe)





/*******************************************************************************

 *

 * FUNCTION:    acpi_mark_gpe_for_wake

 *

 * PARAMETERS:  gpe_device          - Parent GPE Device. NULL for GPE0/GPE1

 *              gpe_number          - GPE level within the GPE block

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply

 *              sets the ACPI_GPE_CAN_WAKE flag.

 *

 * Some potential callers of acpi_setup_gpe_for_wake may know in advance that

 * there won't be any notify handlers installed for device wake notifications

 * from the given GPE (one example is a button GPE in Linux). For these cases,

 * acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake.

 * This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to

 * setup implicit wake notification for it (since there's no handler method).

 *

 ******************************************************************************/

acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number)

{

	struct acpi_gpe_event_info *gpe_event_info;

	acpi_status status = AE_BAD_PARAMETER;

	acpi_cpu_flags flags;



	ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake);



	flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);



	/* Ensure that we have a valid GPE number */



	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);

	if (gpe_event_info) {



		/* Mark the GPE as a possible wake event */



		gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;

		status = AE_OK;

	}



	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);

	return_ACPI_STATUS(status);

}



ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake)



/*******************************************************************************

 *

 * FUNCTION:    acpi_setup_gpe_for_wake

include/acpi/acpixf.h

+4 −0
Original line number Diff line number Diff line
@@ -674,6 +674,10 @@ ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status 
				acpi_finish_gpe(acpi_handle gpe_device,

						u32 gpe_number))



ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status

				acpi_mark_gpe_for_wake(acpi_handle gpe_device,

						       u32 gpe_number))



ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status

				acpi_setup_gpe_for_wake(acpi_handle

							parent_device,

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