diff options
Diffstat (limited to 'drivers/acpi/acpica/evxfevnt.c')
| -rw-r--r-- | drivers/acpi/acpica/evxfevnt.c | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c index fda5b44a556..bd06fad83e7 100644 --- a/drivers/acpi/acpica/evxfevnt.c +++ b/drivers/acpi/acpica/evxfevnt.c @@ -389,6 +389,59 @@ ACPI_EXPORT_SYMBOL(acpi_disable_gpe) /******************************************************************************* * + * FUNCTION: acpi_gpe_can_wake + * + * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1 + * gpe_number - GPE level within the GPE block + * + * RETURN: Status + * + * DESCRIPTION: Set the ACPI_GPE_CAN_WAKE flag for the given GPE. If the GPE + * has a corresponding method and is currently enabled, disable it + * (GPEs with corresponding methods are enabled unconditionally + * during initialization, but GPEs that can wake up are expected + * to be initially disabled). + * + ******************************************************************************/ +acpi_status acpi_gpe_can_wake(acpi_handle gpe_device, u32 gpe_number) +{ + acpi_status status = AE_OK; + struct acpi_gpe_event_info *gpe_event_info; + acpi_cpu_flags flags; + u8 disable = 0; + + ACPI_FUNCTION_TRACE(acpi_gpe_can_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) { + status = AE_BAD_PARAMETER; + goto unlock_and_exit; + } + + if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) { + goto unlock_and_exit; + } + + gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; + disable = (gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD) + && gpe_event_info->runtime_count; + +unlock_and_exit: + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + + if (disable) + status = acpi_disable_gpe(gpe_device, gpe_number); + + return_ACPI_STATUS(status); +} +ACPI_EXPORT_SYMBOL(acpi_gpe_can_wake) + +/******************************************************************************* + * * FUNCTION: acpi_disable_event * * PARAMETERS: Event - The fixed eventto be enabled @@ -703,7 +756,7 @@ acpi_install_gpe_block(acpi_handle gpe_device, obj_desc->device.gpe_block = gpe_block; - /* Run the _PRW methods and enable the runtime GPEs in the new block */ + /* Enable the runtime GPEs in the new block */ status = acpi_ev_initialize_gpe_block(node, gpe_block); |