On Monday, December 06, 2010, Lin Ming wrote:
> Create a new file evxfgpe.c and move GPE specific functions to it.
>
> Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
Acked-by: Rafael J. Wysocki <rjw@xxxxxxx>
> ---
> drivers/acpi/acpica/Makefile | 2 +-
> drivers/acpi/acpica/acevents.h | 4 +
> drivers/acpi/acpica/evgpeutil.c | 39 +++
> drivers/acpi/acpica/evxfevnt.c | 600 --------------------------------------
> drivers/acpi/acpica/evxfgpe.c | 610 +++++++++++++++++++++++++++++++++++++++
> 5 files changed, 654 insertions(+), 601 deletions(-)
> create mode 100644 drivers/acpi/acpica/evxfgpe.c
>
> diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile
> index a7e1d1a..eec2ead 100644
> --- a/drivers/acpi/acpica/Makefile
> +++ b/drivers/acpi/acpica/Makefile
> @@ -14,7 +14,7 @@ acpi-y := dsfield.o dsmthdat.o dsopcode.o dswexec.o dswscope.o \
>
> acpi-y += evevent.o evregion.o evsci.o evxfevnt.o \
> evmisc.o evrgnini.o evxface.o evxfregn.o \
> - evgpe.o evgpeblk.o evgpeinit.o evgpeutil.o
> + evgpe.o evgpeblk.o evgpeinit.o evgpeutil.o evxfgpe.o
>
> acpi-y += exconfig.o exfield.o exnames.o exoparg6.o exresolv.o exstorob.o\
> exconvrt.o exfldio.o exoparg1.o exprep.o exresop.o exsystem.o\
> diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
> index a6f99cc..43f15c8 100644
> --- a/drivers/acpi/acpica/acevents.h
> +++ b/drivers/acpi/acpica/acevents.h
> @@ -138,6 +138,10 @@ acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
>
> u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
>
> +acpi_status
> +acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
> + struct acpi_gpe_block_info *gpe_block, void *context);
> +
> struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number);
>
> acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
> diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
> index 19a0e51..10e4774 100644
> --- a/drivers/acpi/acpica/evgpeutil.c
> +++ b/drivers/acpi/acpica/evgpeutil.c
> @@ -154,6 +154,45 @@ u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
>
> /*******************************************************************************
> *
> + * FUNCTION: acpi_ev_get_gpe_device
> + *
> + * PARAMETERS: GPE_WALK_CALLBACK
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE
> + * block device. NULL if the GPE is one of the FADT-defined GPEs.
> + *
> + ******************************************************************************/
> +
> +acpi_status
> +acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
> + struct acpi_gpe_block_info *gpe_block, void *context)
> +{
> + struct acpi_gpe_device_info *info = context;
> +
> + /* Increment Index by the number of GPEs in this block */
> +
> + info->next_block_base_index += gpe_block->gpe_count;
> +
> + if (info->index < info->next_block_base_index) {
> + /*
> + * The GPE index is within this block, get the node. Leave the node
> + * NULL for the FADT-defined GPEs
> + */
> + if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) {
> + info->gpe_device = gpe_block->node;
> + }
> +
> + info->status = AE_OK;
> + return (AE_CTRL_END);
> + }
> +
> + return (AE_OK);
> +}
> +
> +/*******************************************************************************
> + *
> * FUNCTION: acpi_ev_get_gpe_xrupt_block
> *
> * PARAMETERS: interrupt_number - Interrupt for a GPE block
> diff --git a/drivers/acpi/acpica/evxfevnt.c b/drivers/acpi/acpica/evxfevnt.c
> index a1dabe3..90488c1 100644
> --- a/drivers/acpi/acpica/evxfevnt.c
> +++ b/drivers/acpi/acpica/evxfevnt.c
> @@ -43,18 +43,11 @@
>
> #include <acpi/acpi.h>
> #include "accommon.h"
> -#include "acevents.h"
> -#include "acnamesp.h"
> #include "actables.h"
>
> #define _COMPONENT ACPI_EVENTS
> ACPI_MODULE_NAME("evxfevnt")
>
> -/* Local prototypes */
> -static acpi_status
> -acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
> - struct acpi_gpe_block_info *gpe_block, void *context);
> -
> /*******************************************************************************
> *
> * FUNCTION: acpi_enable
> @@ -213,185 +206,6 @@ ACPI_EXPORT_SYMBOL(acpi_enable_event)
>
> /*******************************************************************************
> *
> - * FUNCTION: acpi_gpe_wakeup
> - *
> - * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> - * gpe_number - GPE level within the GPE block
> - * Action - Enable or Disable
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit.
> - *
> - ******************************************************************************/
> -acpi_status acpi_gpe_wakeup(acpi_handle gpe_device, u32 gpe_number, u8 action)
> -{
> - acpi_status status = AE_OK;
> - struct acpi_gpe_event_info *gpe_event_info;
> - struct acpi_gpe_register_info *gpe_register_info;
> - acpi_cpu_flags flags;
> - u32 register_bit;
> -
> - ACPI_FUNCTION_TRACE(acpi_gpe_wakeup);
> -
> - 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 || !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
> - status = AE_BAD_PARAMETER;
> - goto unlock_and_exit;
> - }
> -
> - gpe_register_info = gpe_event_info->register_info;
> - if (!gpe_register_info) {
> - status = AE_NOT_EXIST;
> - goto unlock_and_exit;
> - }
> -
> - register_bit =
> - acpi_hw_get_gpe_register_bit(gpe_event_info, gpe_register_info);
> -
> - /* Perform the action */
> -
> - switch (action) {
> - case ACPI_GPE_ENABLE:
> - ACPI_SET_BIT(gpe_register_info->enable_for_wake,
> - (u8)register_bit);
> - break;
> -
> - case ACPI_GPE_DISABLE:
> - ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
> - (u8)register_bit);
> - break;
> -
> - default:
> - ACPI_ERROR((AE_INFO, "%u, Invalid action", action));
> - status = AE_BAD_PARAMETER;
> - break;
> - }
> -
> -unlock_and_exit:
> - acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> - return_ACPI_STATUS(status);
> -}
> -
> -ACPI_EXPORT_SYMBOL(acpi_gpe_wakeup)
> -
> -/*******************************************************************************
> - *
> - * FUNCTION: acpi_enable_gpe
> - *
> - * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> - * gpe_number - GPE level within the GPE block
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
> - * hardware-enabled.
> - *
> - ******************************************************************************/
> -acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
> -{
> - acpi_status status = AE_BAD_PARAMETER;
> - struct acpi_gpe_event_info *gpe_event_info;
> - acpi_cpu_flags flags;
> -
> - ACPI_FUNCTION_TRACE(acpi_enable_gpe);
> -
> - 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 = acpi_raw_enable_gpe(gpe_event_info);
> - }
> -
> - acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> - return_ACPI_STATUS(status);
> -}
> -ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
> -
> -/*******************************************************************************
> - *
> - * FUNCTION: acpi_disable_gpe
> - *
> - * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> - * gpe_number - GPE level within the GPE block
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Remove a reference to a GPE. When the last reference is
> - * removed, only then is the GPE disabled (for runtime GPEs), or
> - * the GPE mask bit disabled (for wake GPEs)
> - *
> - ******************************************************************************/
> -acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
> -{
> - acpi_status status = AE_BAD_PARAMETER;
> - struct acpi_gpe_event_info *gpe_event_info;
> - acpi_cpu_flags flags;
> -
> - ACPI_FUNCTION_TRACE(acpi_disable_gpe);
> -
> - 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 = acpi_raw_disable_gpe(gpe_event_info) ;
> - }
> -
> - acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> - return_ACPI_STATUS(status);
> -}
> -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;
> -
> - 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) {
> - gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
> - } else {
> - status = AE_BAD_PARAMETER;
> - }
> -
> - acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> - return_ACPI_STATUS(status);
> -}
> -ACPI_EXPORT_SYMBOL(acpi_gpe_can_wake)
> -
> -/*******************************************************************************
> - *
> * FUNCTION: acpi_disable_event
> *
> * PARAMETERS: Event - The fixed eventto be enabled
> @@ -483,44 +297,6 @@ ACPI_EXPORT_SYMBOL(acpi_clear_event)
>
> /*******************************************************************************
> *
> - * FUNCTION: acpi_clear_gpe
> - *
> - * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> - * gpe_number - GPE level within the GPE block
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Clear an ACPI event (general purpose)
> - *
> - ******************************************************************************/
> -acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
> -{
> - acpi_status status = AE_OK;
> - struct acpi_gpe_event_info *gpe_event_info;
> - acpi_cpu_flags flags;
> -
> - ACPI_FUNCTION_TRACE(acpi_clear_gpe);
> -
> - 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;
> - }
> -
> - status = acpi_hw_clear_gpe(gpe_event_info);
> -
> - unlock_and_exit:
> - acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> - return_ACPI_STATUS(status);
> -}
> -
> -ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
> -/*******************************************************************************
> - *
> * FUNCTION: acpi_get_event_status
> *
> * PARAMETERS: Event - The fixed event
> @@ -575,379 +351,3 @@ acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status)
> }
>
> ACPI_EXPORT_SYMBOL(acpi_get_event_status)
> -
> -/*******************************************************************************
> - *
> - * FUNCTION: acpi_get_gpe_status
> - *
> - * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> - * gpe_number - GPE level within the GPE block
> - * event_status - Where the current status of the event will
> - * be returned
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Get status of an event (general purpose)
> - *
> - ******************************************************************************/
> -acpi_status
> -acpi_get_gpe_status(acpi_handle gpe_device,
> - u32 gpe_number, acpi_event_status *event_status)
> -{
> - acpi_status status = AE_OK;
> - struct acpi_gpe_event_info *gpe_event_info;
> - acpi_cpu_flags flags;
> -
> - ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
> -
> - 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;
> - }
> -
> - /* Obtain status on the requested GPE number */
> -
> - status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
> -
> - if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
> - *event_status |= ACPI_EVENT_FLAG_HANDLE;
> -
> - unlock_and_exit:
> - acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> - return_ACPI_STATUS(status);
> -}
> -
> -ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
> -/*******************************************************************************
> - *
> - * FUNCTION: acpi_install_gpe_block
> - *
> - * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
> - * gpe_block_address - Address and space_iD
> - * register_count - Number of GPE register pairs in the block
> - * interrupt_number - H/W interrupt for the block
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Create and Install a block of GPE registers
> - *
> - ******************************************************************************/
> -acpi_status
> -acpi_install_gpe_block(acpi_handle gpe_device,
> - struct acpi_generic_address *gpe_block_address,
> - u32 register_count, u32 interrupt_number)
> -{
> - acpi_status status = AE_OK;
> - union acpi_operand_object *obj_desc;
> - struct acpi_namespace_node *node;
> - struct acpi_gpe_block_info *gpe_block;
> -
> - ACPI_FUNCTION_TRACE(acpi_install_gpe_block);
> -
> - if ((!gpe_device) || (!gpe_block_address) || (!register_count)) {
> - return_ACPI_STATUS(AE_BAD_PARAMETER);
> - }
> -
> - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
> - if (ACPI_FAILURE(status)) {
> - return (status);
> - }
> -
> - node = acpi_ns_validate_handle(gpe_device);
> - if (!node) {
> - status = AE_BAD_PARAMETER;
> - goto unlock_and_exit;
> - }
> -
> - /*
> - * For user-installed GPE Block Devices, the gpe_block_base_number
> - * is always zero
> - */
> - status =
> - acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0,
> - interrupt_number, &gpe_block);
> - if (ACPI_FAILURE(status)) {
> - goto unlock_and_exit;
> - }
> -
> - /* Install block in the device_object attached to the node */
> -
> - obj_desc = acpi_ns_get_attached_object(node);
> - if (!obj_desc) {
> -
> - /*
> - * No object, create a new one (Device nodes do not always have
> - * an attached object)
> - */
> - obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
> - if (!obj_desc) {
> - status = AE_NO_MEMORY;
> - goto unlock_and_exit;
> - }
> -
> - status =
> - acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE);
> -
> - /* Remove local reference to the object */
> -
> - acpi_ut_remove_reference(obj_desc);
> -
> - if (ACPI_FAILURE(status)) {
> - goto unlock_and_exit;
> - }
> - }
> -
> - /* Now install the GPE block in the device_object */
> -
> - obj_desc->device.gpe_block = gpe_block;
> -
> - unlock_and_exit:
> - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
> - return_ACPI_STATUS(status);
> -}
> -
> -ACPI_EXPORT_SYMBOL(acpi_install_gpe_block)
> -
> -/*******************************************************************************
> - *
> - * FUNCTION: acpi_remove_gpe_block
> - *
> - * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Remove a previously installed block of GPE registers
> - *
> - ******************************************************************************/
> -acpi_status acpi_remove_gpe_block(acpi_handle gpe_device)
> -{
> - union acpi_operand_object *obj_desc;
> - acpi_status status;
> - struct acpi_namespace_node *node;
> -
> - ACPI_FUNCTION_TRACE(acpi_remove_gpe_block);
> -
> - if (!gpe_device) {
> - return_ACPI_STATUS(AE_BAD_PARAMETER);
> - }
> -
> - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
> - if (ACPI_FAILURE(status)) {
> - return (status);
> - }
> -
> - node = acpi_ns_validate_handle(gpe_device);
> - if (!node) {
> - status = AE_BAD_PARAMETER;
> - goto unlock_and_exit;
> - }
> -
> - /* Get the device_object attached to the node */
> -
> - obj_desc = acpi_ns_get_attached_object(node);
> - if (!obj_desc || !obj_desc->device.gpe_block) {
> - return_ACPI_STATUS(AE_NULL_OBJECT);
> - }
> -
> - /* Delete the GPE block (but not the device_object) */
> -
> - status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block);
> - if (ACPI_SUCCESS(status)) {
> - obj_desc->device.gpe_block = NULL;
> - }
> -
> - unlock_and_exit:
> - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
> - return_ACPI_STATUS(status);
> -}
> -
> -ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block)
> -
> -/*******************************************************************************
> - *
> - * FUNCTION: acpi_get_gpe_device
> - *
> - * PARAMETERS: Index - System GPE index (0-current_gpe_count)
> - * gpe_device - Where the parent GPE Device is returned
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
> - * gpe device indicates that the gpe number is contained in one of
> - * the FADT-defined gpe blocks. Otherwise, the GPE block device.
> - *
> - ******************************************************************************/
> -acpi_status
> -acpi_get_gpe_device(u32 index, acpi_handle *gpe_device)
> -{
> - struct acpi_gpe_device_info info;
> - acpi_status status;
> -
> - ACPI_FUNCTION_TRACE(acpi_get_gpe_device);
> -
> - if (!gpe_device) {
> - return_ACPI_STATUS(AE_BAD_PARAMETER);
> - }
> -
> - if (index >= acpi_current_gpe_count) {
> - return_ACPI_STATUS(AE_NOT_EXIST);
> - }
> -
> - /* Setup and walk the GPE list */
> -
> - info.index = index;
> - info.status = AE_NOT_EXIST;
> - info.gpe_device = NULL;
> - info.next_block_base_index = 0;
> -
> - status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info);
> - if (ACPI_FAILURE(status)) {
> - return_ACPI_STATUS(status);
> - }
> -
> - *gpe_device = info.gpe_device;
> - return_ACPI_STATUS(info.status);
> -}
> -
> -ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
> -
> -/*******************************************************************************
> - *
> - * FUNCTION: acpi_ev_get_gpe_device
> - *
> - * PARAMETERS: GPE_WALK_CALLBACK
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE
> - * block device. NULL if the GPE is one of the FADT-defined GPEs.
> - *
> - ******************************************************************************/
> -static acpi_status
> -acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
> - struct acpi_gpe_block_info *gpe_block, void *context)
> -{
> - struct acpi_gpe_device_info *info = context;
> -
> - /* Increment Index by the number of GPEs in this block */
> -
> - info->next_block_base_index += gpe_block->gpe_count;
> -
> - if (info->index < info->next_block_base_index) {
> - /*
> - * The GPE index is within this block, get the node. Leave the node
> - * NULL for the FADT-defined GPEs
> - */
> - if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) {
> - info->gpe_device = gpe_block->node;
> - }
> -
> - info->status = AE_OK;
> - return (AE_CTRL_END);
> - }
> -
> - return (AE_OK);
> -}
> -
> -/******************************************************************************
> - *
> - * FUNCTION: acpi_disable_all_gpes
> - *
> - * PARAMETERS: None
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
> - *
> - ******************************************************************************/
> -
> -acpi_status acpi_disable_all_gpes(void)
> -{
> - acpi_status status;
> -
> - ACPI_FUNCTION_TRACE(acpi_disable_all_gpes);
> -
> - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
> - if (ACPI_FAILURE(status)) {
> - return_ACPI_STATUS(status);
> - }
> -
> - status = acpi_hw_disable_all_gpes();
> - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> -
> - return_ACPI_STATUS(status);
> -}
> -
> -/******************************************************************************
> - *
> - * FUNCTION: acpi_enable_all_runtime_gpes
> - *
> - * PARAMETERS: None
> - *
> - * RETURN: Status
> - *
> - * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
> - *
> - ******************************************************************************/
> -
> -acpi_status acpi_enable_all_runtime_gpes(void)
> -{
> - acpi_status status;
> -
> - ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes);
> -
> - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
> - if (ACPI_FAILURE(status)) {
> - return_ACPI_STATUS(status);
> - }
> -
> - status = acpi_hw_enable_all_runtime_gpes();
> - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> -
> - return_ACPI_STATUS(status);
> -}
> -
> -/******************************************************************************
> - *
> - * FUNCTION: acpi_update_gpes
> - *
> - * PARAMETERS: None
> - *
> - * RETURN: None
> - *
> - * DESCRIPTION: Enable all GPEs that have associated _Lxx or _Exx methods and
> - * are not pointed to by any device _PRW methods indicating that
> - * these GPEs are generally intended for system or device wakeup
> - * (such GPEs have to be enabled directly when the devices whose
> - * _PRW methods point to them are set up for wakeup signaling).
> - *
> - ******************************************************************************/
> -
> -acpi_status acpi_update_gpes(void)
> -{
> - acpi_status status;
> -
> - ACPI_FUNCTION_TRACE(acpi_update_gpes);
> -
> - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
> - if (ACPI_FAILURE(status)) {
> - return_ACPI_STATUS(status);
> - } else if (acpi_all_gpes_initialized) {
> - goto unlock;
> - }
> -
> - status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL);
> - if (ACPI_SUCCESS(status)) {
> - acpi_all_gpes_initialized = TRUE;
> - }
> -
> -unlock:
> - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> -
> - return_ACPI_STATUS(status);
> -}
> diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
> new file mode 100644
> index 0000000..8068065
> --- /dev/null
> +++ b/drivers/acpi/acpica/evxfgpe.c
> @@ -0,0 +1,610 @@
> +/******************************************************************************
> + *
> + * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
> + *
> + *****************************************************************************/
> +
> +/*
> + * Copyright (C) 2000 - 2010, Intel Corp.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions, and the following disclaimer,
> + * without modification.
> + * 2. Redistributions in binary form must reproduce at minimum a disclaimer
> + * substantially similar to the "NO WARRANTY" disclaimer below
> + * ("Disclaimer") and any redistribution must be conditioned upon
> + * including a substantially similar Disclaimer requirement for further
> + * binary redistribution.
> + * 3. Neither the names of the above-listed copyright holders nor the names
> + * of any contributors may be used to endorse or promote products derived
> + * from this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * NO WARRANTY
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
> + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
> + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
> + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGES.
> + */
> +
> +#include <acpi/acpi.h>
> +#include "accommon.h"
> +#include "acevents.h"
> +#include "acnamesp.h"
> +
> +#define _COMPONENT ACPI_EVENTS
> +ACPI_MODULE_NAME("evxfgpe")
> +
> +/******************************************************************************
> + *
> + * FUNCTION: acpi_update_gpes
> + *
> + * PARAMETERS: None
> + *
> + * RETURN: None
> + *
> + * DESCRIPTION: Enable all GPEs that have associated _Lxx or _Exx methods and
> + * are not pointed to by any device _PRW methods indicating that
> + * these GPEs are generally intended for system or device wakeup
> + * (such GPEs have to be enabled directly when the devices whose
> + * _PRW methods point to them are set up for wakeup signaling).
> + *
> + ******************************************************************************/
> +
> +acpi_status acpi_update_gpes(void)
> +{
> + acpi_status status;
> +
> + ACPI_FUNCTION_TRACE(acpi_update_gpes);
> +
> + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
> + if (ACPI_FAILURE(status)) {
> + return_ACPI_STATUS(status);
> + } else if (acpi_all_gpes_initialized) {
> + goto unlock;
> + }
> +
> + status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL);
> + if (ACPI_SUCCESS(status)) {
> + acpi_all_gpes_initialized = TRUE;
> + }
> +
> +unlock:
> + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> +
> + return_ACPI_STATUS(status);
> +}
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_enable_gpe
> + *
> + * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> + * gpe_number - GPE level within the GPE block
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
> + * hardware-enabled.
> + *
> + ******************************************************************************/
> +
> +acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
> +{
> + acpi_status status = AE_BAD_PARAMETER;
> + struct acpi_gpe_event_info *gpe_event_info;
> + acpi_cpu_flags flags;
> +
> + ACPI_FUNCTION_TRACE(acpi_enable_gpe);
> +
> + 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 = acpi_raw_enable_gpe(gpe_event_info);
> + }
> +
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> + return_ACPI_STATUS(status);
> +}
> +ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_disable_gpe
> + *
> + * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> + * gpe_number - GPE level within the GPE block
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Remove a reference to a GPE. When the last reference is
> + * removed, only then is the GPE disabled (for runtime GPEs), or
> + * the GPE mask bit disabled (for wake GPEs)
> + *
> + ******************************************************************************/
> +
> +acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
> +{
> + acpi_status status = AE_BAD_PARAMETER;
> + struct acpi_gpe_event_info *gpe_event_info;
> + acpi_cpu_flags flags;
> +
> + ACPI_FUNCTION_TRACE(acpi_disable_gpe);
> +
> + 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 = acpi_raw_disable_gpe(gpe_event_info) ;
> + }
> +
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> + return_ACPI_STATUS(status);
> +}
> +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;
> +
> + 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) {
> + gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
> + } else {
> + status = AE_BAD_PARAMETER;
> + }
> +
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> + return_ACPI_STATUS(status);
> +}
> +ACPI_EXPORT_SYMBOL(acpi_gpe_can_wake)
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_gpe_wakeup
> + *
> + * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> + * gpe_number - GPE level within the GPE block
> + * Action - Enable or Disable
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit.
> + *
> + ******************************************************************************/
> +
> +acpi_status acpi_gpe_wakeup(acpi_handle gpe_device, u32 gpe_number, u8 action)
> +{
> + acpi_status status = AE_OK;
> + struct acpi_gpe_event_info *gpe_event_info;
> + struct acpi_gpe_register_info *gpe_register_info;
> + acpi_cpu_flags flags;
> + u32 register_bit;
> +
> + ACPI_FUNCTION_TRACE(acpi_gpe_wakeup);
> +
> + 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 || !(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
> + status = AE_BAD_PARAMETER;
> + goto unlock_and_exit;
> + }
> +
> + gpe_register_info = gpe_event_info->register_info;
> + if (!gpe_register_info) {
> + status = AE_NOT_EXIST;
> + goto unlock_and_exit;
> + }
> +
> + register_bit =
> + acpi_hw_get_gpe_register_bit(gpe_event_info, gpe_register_info);
> +
> + /* Perform the action */
> +
> + switch (action) {
> + case ACPI_GPE_ENABLE:
> + ACPI_SET_BIT(gpe_register_info->enable_for_wake,
> + (u8)register_bit);
> + break;
> +
> + case ACPI_GPE_DISABLE:
> + ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
> + (u8)register_bit);
> + break;
> +
> + default:
> + ACPI_ERROR((AE_INFO, "%u, Invalid action", action));
> + status = AE_BAD_PARAMETER;
> + break;
> + }
> +
> +unlock_and_exit:
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> + return_ACPI_STATUS(status);
> +}
> +
> +ACPI_EXPORT_SYMBOL(acpi_gpe_wakeup)
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_clear_gpe
> + *
> + * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> + * gpe_number - GPE level within the GPE block
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Clear an ACPI event (general purpose)
> + *
> + ******************************************************************************/
> +acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
> +{
> + acpi_status status = AE_OK;
> + struct acpi_gpe_event_info *gpe_event_info;
> + acpi_cpu_flags flags;
> +
> + ACPI_FUNCTION_TRACE(acpi_clear_gpe);
> +
> + 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;
> + }
> +
> + status = acpi_hw_clear_gpe(gpe_event_info);
> +
> + unlock_and_exit:
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> + return_ACPI_STATUS(status);
> +}
> +
> +ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_get_gpe_status
> + *
> + * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
> + * gpe_number - GPE level within the GPE block
> + * event_status - Where the current status of the event will
> + * be returned
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Get status of an event (general purpose)
> + *
> + ******************************************************************************/
> +acpi_status
> +acpi_get_gpe_status(acpi_handle gpe_device,
> + u32 gpe_number, acpi_event_status *event_status)
> +{
> + acpi_status status = AE_OK;
> + struct acpi_gpe_event_info *gpe_event_info;
> + acpi_cpu_flags flags;
> +
> + ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
> +
> + 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;
> + }
> +
> + /* Obtain status on the requested GPE number */
> +
> + status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
> +
> + if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
> + *event_status |= ACPI_EVENT_FLAG_HANDLE;
> +
> + unlock_and_exit:
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> + return_ACPI_STATUS(status);
> +}
> +
> +ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
> +
> +/******************************************************************************
> + *
> + * FUNCTION: acpi_disable_all_gpes
> + *
> + * PARAMETERS: None
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
> + *
> + ******************************************************************************/
> +
> +acpi_status acpi_disable_all_gpes(void)
> +{
> + acpi_status status;
> +
> + ACPI_FUNCTION_TRACE(acpi_disable_all_gpes);
> +
> + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
> + if (ACPI_FAILURE(status)) {
> + return_ACPI_STATUS(status);
> + }
> +
> + status = acpi_hw_disable_all_gpes();
> + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> +
> + return_ACPI_STATUS(status);
> +}
> +
> +/******************************************************************************
> + *
> + * FUNCTION: acpi_enable_all_runtime_gpes
> + *
> + * PARAMETERS: None
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
> + *
> + ******************************************************************************/
> +
> +acpi_status acpi_enable_all_runtime_gpes(void)
> +{
> + acpi_status status;
> +
> + ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes);
> +
> + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
> + if (ACPI_FAILURE(status)) {
> + return_ACPI_STATUS(status);
> + }
> +
> + status = acpi_hw_enable_all_runtime_gpes();
> + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> +
> + return_ACPI_STATUS(status);
> +}
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_install_gpe_block
> + *
> + * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
> + * gpe_block_address - Address and space_iD
> + * register_count - Number of GPE register pairs in the block
> + * interrupt_number - H/W interrupt for the block
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Create and Install a block of GPE registers
> + *
> + ******************************************************************************/
> +acpi_status
> +acpi_install_gpe_block(acpi_handle gpe_device,
> + struct acpi_generic_address *gpe_block_address,
> + u32 register_count, u32 interrupt_number)
> +{
> + acpi_status status = AE_OK;
> + union acpi_operand_object *obj_desc;
> + struct acpi_namespace_node *node;
> + struct acpi_gpe_block_info *gpe_block;
> +
> + ACPI_FUNCTION_TRACE(acpi_install_gpe_block);
> +
> + if ((!gpe_device) || (!gpe_block_address) || (!register_count)) {
> + return_ACPI_STATUS(AE_BAD_PARAMETER);
> + }
> +
> + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
> + if (ACPI_FAILURE(status)) {
> + return (status);
> + }
> +
> + node = acpi_ns_validate_handle(gpe_device);
> + if (!node) {
> + status = AE_BAD_PARAMETER;
> + goto unlock_and_exit;
> + }
> +
> + /*
> + * For user-installed GPE Block Devices, the gpe_block_base_number
> + * is always zero
> + */
> + status =
> + acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0,
> + interrupt_number, &gpe_block);
> + if (ACPI_FAILURE(status)) {
> + goto unlock_and_exit;
> + }
> +
> + /* Install block in the device_object attached to the node */
> +
> + obj_desc = acpi_ns_get_attached_object(node);
> + if (!obj_desc) {
> +
> + /*
> + * No object, create a new one (Device nodes do not always have
> + * an attached object)
> + */
> + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
> + if (!obj_desc) {
> + status = AE_NO_MEMORY;
> + goto unlock_and_exit;
> + }
> +
> + status =
> + acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE);
> +
> + /* Remove local reference to the object */
> +
> + acpi_ut_remove_reference(obj_desc);
> +
> + if (ACPI_FAILURE(status)) {
> + goto unlock_and_exit;
> + }
> + }
> +
> + /* Now install the GPE block in the device_object */
> +
> + obj_desc->device.gpe_block = gpe_block;
> +
> + unlock_and_exit:
> + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
> + return_ACPI_STATUS(status);
> +}
> +
> +ACPI_EXPORT_SYMBOL(acpi_install_gpe_block)
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_remove_gpe_block
> + *
> + * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Remove a previously installed block of GPE registers
> + *
> + ******************************************************************************/
> +acpi_status acpi_remove_gpe_block(acpi_handle gpe_device)
> +{
> + union acpi_operand_object *obj_desc;
> + acpi_status status;
> + struct acpi_namespace_node *node;
> +
> + ACPI_FUNCTION_TRACE(acpi_remove_gpe_block);
> +
> + if (!gpe_device) {
> + return_ACPI_STATUS(AE_BAD_PARAMETER);
> + }
> +
> + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
> + if (ACPI_FAILURE(status)) {
> + return (status);
> + }
> +
> + node = acpi_ns_validate_handle(gpe_device);
> + if (!node) {
> + status = AE_BAD_PARAMETER;
> + goto unlock_and_exit;
> + }
> +
> + /* Get the device_object attached to the node */
> +
> + obj_desc = acpi_ns_get_attached_object(node);
> + if (!obj_desc || !obj_desc->device.gpe_block) {
> + return_ACPI_STATUS(AE_NULL_OBJECT);
> + }
> +
> + /* Delete the GPE block (but not the device_object) */
> +
> + status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block);
> + if (ACPI_SUCCESS(status)) {
> + obj_desc->device.gpe_block = NULL;
> + }
> +
> + unlock_and_exit:
> + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
> + return_ACPI_STATUS(status);
> +}
> +
> +ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block)
> +
> +/*******************************************************************************
> + *
> + * FUNCTION: acpi_get_gpe_device
> + *
> + * PARAMETERS: Index - System GPE index (0-current_gpe_count)
> + * gpe_device - Where the parent GPE Device is returned
> + *
> + * RETURN: Status
> + *
> + * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
> + * gpe device indicates that the gpe number is contained in one of
> + * the FADT-defined gpe blocks. Otherwise, the GPE block device.
> + *
> + ******************************************************************************/
> +acpi_status
> +acpi_get_gpe_device(u32 index, acpi_handle *gpe_device)
> +{
> + struct acpi_gpe_device_info info;
> + acpi_status status;
> +
> + ACPI_FUNCTION_TRACE(acpi_get_gpe_device);
> +
> + if (!gpe_device) {
> + return_ACPI_STATUS(AE_BAD_PARAMETER);
> + }
> +
> + if (index >= acpi_current_gpe_count) {
> + return_ACPI_STATUS(AE_NOT_EXIST);
> + }
> +
> + /* Setup and walk the GPE list */
> +
> + info.index = index;
> + info.status = AE_NOT_EXIST;
> + info.gpe_device = NULL;
> + info.next_block_base_index = 0;
> +
> + status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info);
> + if (ACPI_FAILURE(status)) {
> + return_ACPI_STATUS(status);
> + }
> +
> + *gpe_device = info.gpe_device;
> + return_ACPI_STATUS(info.status);
> +}
> +
> +ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
>
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