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-rw-r--r--drivers/acpi/acpica/evxfgpe.c696
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diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
new file mode 100644
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+++ b/drivers/acpi/acpica/evxfgpe.c
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1/******************************************************************************
2 *
3 * Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
48
49#define _COMPONENT ACPI_EVENTS
50ACPI_MODULE_NAME("evxfgpe")
51
52/******************************************************************************
53 *
54 * FUNCTION: acpi_update_all_gpes
55 *
56 * PARAMETERS: None
57 *
58 * RETURN: Status
59 *
60 * DESCRIPTION: Complete GPE initialization and enable all GPEs that have
61 * associated _Lxx or _Exx methods and are not pointed to by any
62 * device _PRW methods (this indicates that these GPEs are
63 * generally intended for system or device wakeup. Such GPEs
64 * have to be enabled directly when the devices whose _PRW
65 * methods point to them are set up for wakeup signaling.)
66 *
67 * NOTE: Should be called after any GPEs are added to the system. Primarily,
68 * after the system _PRW methods have been run, but also after a GPE Block
69 * Device has been added or if any new GPE methods have been added via a
70 * dynamic table load.
71 *
72 ******************************************************************************/
73
74acpi_status acpi_update_all_gpes(void)
75{
76 acpi_status status;
77
78 ACPI_FUNCTION_TRACE(acpi_update_all_gpes);
79
80 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
81 if (ACPI_FAILURE(status)) {
82 return_ACPI_STATUS(status);
83 }
84
85 if (acpi_gbl_all_gpes_initialized) {
86 goto unlock_and_exit;
87 }
88
89 status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL);
90 if (ACPI_SUCCESS(status)) {
91 acpi_gbl_all_gpes_initialized = TRUE;
92 }
93
94unlock_and_exit:
95 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
96
97 return_ACPI_STATUS(status);
98}
99
100ACPI_EXPORT_SYMBOL(acpi_update_all_gpes)
101
102/*******************************************************************************
103 *
104 * FUNCTION: acpi_enable_gpe
105 *
106 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
107 * gpe_number - GPE level within the GPE block
108 *
109 * RETURN: Status
110 *
111 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
112 * hardware-enabled.
113 *
114 ******************************************************************************/
115
116acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
117{
118 acpi_status status = AE_BAD_PARAMETER;
119 struct acpi_gpe_event_info *gpe_event_info;
120 acpi_cpu_flags flags;
121
122 ACPI_FUNCTION_TRACE(acpi_enable_gpe);
123
124 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
125
126 /* Ensure that we have a valid GPE number */
127
128 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
129 if (gpe_event_info) {
130 status = acpi_ev_add_gpe_reference(gpe_event_info);
131 }
132
133 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
134 return_ACPI_STATUS(status);
135}
136ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
137
138/*******************************************************************************
139 *
140 * FUNCTION: acpi_disable_gpe
141 *
142 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
143 * gpe_number - GPE level within the GPE block
144 *
145 * RETURN: Status
146 *
147 * DESCRIPTION: Remove a reference to a GPE. When the last reference is
148 * removed, only then is the GPE disabled (for runtime GPEs), or
149 * the GPE mask bit disabled (for wake GPEs)
150 *
151 ******************************************************************************/
152
153acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
154{
155 acpi_status status = AE_BAD_PARAMETER;
156 struct acpi_gpe_event_info *gpe_event_info;
157 acpi_cpu_flags flags;
158
159 ACPI_FUNCTION_TRACE(acpi_disable_gpe);
160
161 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
162
163 /* Ensure that we have a valid GPE number */
164
165 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
166 if (gpe_event_info) {
167 status = acpi_ev_remove_gpe_reference(gpe_event_info) ;
168 }
169
170 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
171 return_ACPI_STATUS(status);
172}
173ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
174
175
176/*******************************************************************************
177 *
178 * FUNCTION: acpi_setup_gpe_for_wake
179 *
180 * PARAMETERS: wake_device - Device associated with the GPE (via _PRW)
181 * gpe_device - Parent GPE Device. NULL for GPE0/GPE1
182 * gpe_number - GPE level within the GPE block
183 *
184 * RETURN: Status
185 *
186 * DESCRIPTION: Mark a GPE as having the ability to wake the system. This
187 * interface is intended to be used as the host executes the
188 * _PRW methods (Power Resources for Wake) in the system tables.
189 * Each _PRW appears under a Device Object (The wake_device), and
190 * contains the info for the wake GPE associated with the
191 * wake_device.
192 *
193 ******************************************************************************/
194acpi_status
195acpi_setup_gpe_for_wake(acpi_handle wake_device,
196 acpi_handle gpe_device, u32 gpe_number)
197{
198 acpi_status status = AE_BAD_PARAMETER;
199 struct acpi_gpe_event_info *gpe_event_info;
200 struct acpi_namespace_node *device_node;
201 struct acpi_gpe_notify_object *notify_object;
202 acpi_cpu_flags flags;
203 u8 gpe_dispatch_mask;
204
205 ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake);
206
207 /* Parameter Validation */
208
209 if (!wake_device) {
210 /*
211 * By forcing wake_device to be valid, we automatically enable the
212 * implicit notify feature on all hosts.
213 */
214 return_ACPI_STATUS(AE_BAD_PARAMETER);
215 }
216
217 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
218
219 /* Ensure that we have a valid GPE number */
220
221 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
222 if (!gpe_event_info) {
223 goto unlock_and_exit;
224 }
225
226 if (wake_device == ACPI_ROOT_OBJECT) {
227 goto out;
228 }
229
230 /*
231 * If there is no method or handler for this GPE, then the
232 * wake_device will be notified whenever this GPE fires (aka
233 * "implicit notify") Note: The GPE is assumed to be
234 * level-triggered (for windows compatibility).
235 */
236 gpe_dispatch_mask = gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK;
237 if (gpe_dispatch_mask != ACPI_GPE_DISPATCH_NONE
238 && gpe_dispatch_mask != ACPI_GPE_DISPATCH_NOTIFY) {
239 goto out;
240 }
241
242 /* Validate wake_device is of type Device */
243
244 device_node = ACPI_CAST_PTR(struct acpi_namespace_node, wake_device);
245 if (device_node->type != ACPI_TYPE_DEVICE) {
246 goto unlock_and_exit;
247 }
248
249 if (gpe_dispatch_mask == ACPI_GPE_DISPATCH_NONE) {
250 gpe_event_info->flags = (ACPI_GPE_DISPATCH_NOTIFY |
251 ACPI_GPE_LEVEL_TRIGGERED);
252 gpe_event_info->dispatch.device.node = device_node;
253 gpe_event_info->dispatch.device.next = NULL;
254 } else {
255 /* There are multiple devices to notify implicitly. */
256
257 notify_object = ACPI_ALLOCATE_ZEROED(sizeof(*notify_object));
258 if (!notify_object) {
259 status = AE_NO_MEMORY;
260 goto unlock_and_exit;
261 }
262
263 notify_object->node = device_node;
264 notify_object->next = gpe_event_info->dispatch.device.next;
265 gpe_event_info->dispatch.device.next = notify_object;
266 }
267
268 out:
269 gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
270 status = AE_OK;
271
272 unlock_and_exit:
273 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
274 return_ACPI_STATUS(status);
275}
276ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake)
277
278/*******************************************************************************
279 *
280 * FUNCTION: acpi_set_gpe_wake_mask
281 *
282 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
283 * gpe_number - GPE level within the GPE block
284 * Action - Enable or Disable
285 *
286 * RETURN: Status
287 *
288 * DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
289 * already be marked as a WAKE GPE.
290 *
291 ******************************************************************************/
292
293acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action)
294{
295 acpi_status status = AE_OK;
296 struct acpi_gpe_event_info *gpe_event_info;
297 struct acpi_gpe_register_info *gpe_register_info;
298 acpi_cpu_flags flags;
299 u32 register_bit;
300
301 ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask);
302
303 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
304
305 /*
306 * Ensure that we have a valid GPE number and that this GPE is in
307 * fact a wake GPE
308 */
309 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
310 if (!gpe_event_info) {
311 status = AE_BAD_PARAMETER;
312 goto unlock_and_exit;
313 }
314
315 if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
316 status = AE_TYPE;
317 goto unlock_and_exit;
318 }
319
320 gpe_register_info = gpe_event_info->register_info;
321 if (!gpe_register_info) {
322 status = AE_NOT_EXIST;
323 goto unlock_and_exit;
324 }
325
326 register_bit =
327 acpi_hw_get_gpe_register_bit(gpe_event_info, gpe_register_info);
328
329 /* Perform the action */
330
331 switch (action) {
332 case ACPI_GPE_ENABLE:
333 ACPI_SET_BIT(gpe_register_info->enable_for_wake,
334 (u8)register_bit);
335 break;
336
337 case ACPI_GPE_DISABLE:
338 ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
339 (u8)register_bit);
340 break;
341
342 default:
343 ACPI_ERROR((AE_INFO, "%u, Invalid action", action));
344 status = AE_BAD_PARAMETER;
345 break;
346 }
347
348unlock_and_exit:
349 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
350 return_ACPI_STATUS(status);
351}
352
353ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask)
354
355/*******************************************************************************
356 *
357 * FUNCTION: acpi_clear_gpe
358 *
359 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
360 * gpe_number - GPE level within the GPE block
361 *
362 * RETURN: Status
363 *
364 * DESCRIPTION: Clear an ACPI event (general purpose)
365 *
366 ******************************************************************************/
367acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
368{
369 acpi_status status = AE_OK;
370 struct acpi_gpe_event_info *gpe_event_info;
371 acpi_cpu_flags flags;
372
373 ACPI_FUNCTION_TRACE(acpi_clear_gpe);
374
375 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
376
377 /* Ensure that we have a valid GPE number */
378
379 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
380 if (!gpe_event_info) {
381 status = AE_BAD_PARAMETER;
382 goto unlock_and_exit;
383 }
384
385 status = acpi_hw_clear_gpe(gpe_event_info);
386
387 unlock_and_exit:
388 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
389 return_ACPI_STATUS(status);
390}
391
392ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
393
394/*******************************************************************************
395 *
396 * FUNCTION: acpi_get_gpe_status
397 *
398 * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
399 * gpe_number - GPE level within the GPE block
400 * event_status - Where the current status of the event will
401 * be returned
402 *
403 * RETURN: Status
404 *
405 * DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
406 *
407 ******************************************************************************/
408acpi_status
409acpi_get_gpe_status(acpi_handle gpe_device,
410 u32 gpe_number, acpi_event_status *event_status)
411{
412 acpi_status status = AE_OK;
413 struct acpi_gpe_event_info *gpe_event_info;
414 acpi_cpu_flags flags;
415
416 ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
417
418 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
419
420 /* Ensure that we have a valid GPE number */
421
422 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
423 if (!gpe_event_info) {
424 status = AE_BAD_PARAMETER;
425 goto unlock_and_exit;
426 }
427
428 /* Obtain status on the requested GPE number */
429
430 status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
431
432 if (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)
433 *event_status |= ACPI_EVENT_FLAG_HANDLE;
434
435 unlock_and_exit:
436 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
437 return_ACPI_STATUS(status);
438}
439
440ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
441
442/******************************************************************************
443 *
444 * FUNCTION: acpi_disable_all_gpes
445 *
446 * PARAMETERS: None
447 *
448 * RETURN: Status
449 *
450 * DESCRIPTION: Disable and clear all GPEs in all GPE blocks
451 *
452 ******************************************************************************/
453
454acpi_status acpi_disable_all_gpes(void)
455{
456 acpi_status status;
457
458 ACPI_FUNCTION_TRACE(acpi_disable_all_gpes);
459
460 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
461 if (ACPI_FAILURE(status)) {
462 return_ACPI_STATUS(status);
463 }
464
465 status = acpi_hw_disable_all_gpes();
466 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
467
468 return_ACPI_STATUS(status);
469}
470
471ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes)
472
473/******************************************************************************
474 *
475 * FUNCTION: acpi_enable_all_runtime_gpes
476 *
477 * PARAMETERS: None
478 *
479 * RETURN: Status
480 *
481 * DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
482 *
483 ******************************************************************************/
484
485acpi_status acpi_enable_all_runtime_gpes(void)
486{
487 acpi_status status;
488
489 ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes);
490
491 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
492 if (ACPI_FAILURE(status)) {
493 return_ACPI_STATUS(status);
494 }
495
496 status = acpi_hw_enable_all_runtime_gpes();
497 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
498
499 return_ACPI_STATUS(status);
500}
501
502ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes)
503
504/*******************************************************************************
505 *
506 * FUNCTION: acpi_install_gpe_block
507 *
508 * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
509 * gpe_block_address - Address and space_iD
510 * register_count - Number of GPE register pairs in the block
511 * interrupt_number - H/W interrupt for the block
512 *
513 * RETURN: Status
514 *
515 * DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
516 * enabled here.
517 *
518 ******************************************************************************/
519acpi_status
520acpi_install_gpe_block(acpi_handle gpe_device,
521 struct acpi_generic_address *gpe_block_address,
522 u32 register_count, u32 interrupt_number)
523{
524 acpi_status status;
525 union acpi_operand_object *obj_desc;
526 struct acpi_namespace_node *node;
527 struct acpi_gpe_block_info *gpe_block;
528
529 ACPI_FUNCTION_TRACE(acpi_install_gpe_block);
530
531 if ((!gpe_device) || (!gpe_block_address) || (!register_count)) {
532 return_ACPI_STATUS(AE_BAD_PARAMETER);
533 }
534
535 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
536 if (ACPI_FAILURE(status)) {
537 return (status);
538 }
539
540 node = acpi_ns_validate_handle(gpe_device);
541 if (!node) {
542 status = AE_BAD_PARAMETER;
543 goto unlock_and_exit;
544 }
545
546 /*
547 * For user-installed GPE Block Devices, the gpe_block_base_number
548 * is always zero
549 */
550 status =
551 acpi_ev_create_gpe_block(node, gpe_block_address, register_count, 0,
552 interrupt_number, &gpe_block);
553 if (ACPI_FAILURE(status)) {
554 goto unlock_and_exit;
555 }
556
557 /* Install block in the device_object attached to the node */
558
559 obj_desc = acpi_ns_get_attached_object(node);
560 if (!obj_desc) {
561
562 /*
563 * No object, create a new one (Device nodes do not always have
564 * an attached object)
565 */
566 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
567 if (!obj_desc) {
568 status = AE_NO_MEMORY;
569 goto unlock_and_exit;
570 }
571
572 status =
573 acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE);
574
575 /* Remove local reference to the object */
576
577 acpi_ut_remove_reference(obj_desc);
578
579 if (ACPI_FAILURE(status)) {
580 goto unlock_and_exit;
581 }
582 }
583
584 /* Now install the GPE block in the device_object */
585
586 obj_desc->device.gpe_block = gpe_block;
587
588 unlock_and_exit:
589 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
590 return_ACPI_STATUS(status);
591}
592
593ACPI_EXPORT_SYMBOL(acpi_install_gpe_block)
594
595/*******************************************************************************
596 *
597 * FUNCTION: acpi_remove_gpe_block
598 *
599 * PARAMETERS: gpe_device - Handle to the parent GPE Block Device
600 *
601 * RETURN: Status
602 *
603 * DESCRIPTION: Remove a previously installed block of GPE registers
604 *
605 ******************************************************************************/
606acpi_status acpi_remove_gpe_block(acpi_handle gpe_device)
607{
608 union acpi_operand_object *obj_desc;
609 acpi_status status;
610 struct acpi_namespace_node *node;
611
612 ACPI_FUNCTION_TRACE(acpi_remove_gpe_block);
613
614 if (!gpe_device) {
615 return_ACPI_STATUS(AE_BAD_PARAMETER);
616 }
617
618 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
619 if (ACPI_FAILURE(status)) {
620 return (status);
621 }
622
623 node = acpi_ns_validate_handle(gpe_device);
624 if (!node) {
625 status = AE_BAD_PARAMETER;
626 goto unlock_and_exit;
627 }
628
629 /* Get the device_object attached to the node */
630
631 obj_desc = acpi_ns_get_attached_object(node);
632 if (!obj_desc || !obj_desc->device.gpe_block) {
633 return_ACPI_STATUS(AE_NULL_OBJECT);
634 }
635
636 /* Delete the GPE block (but not the device_object) */
637
638 status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block);
639 if (ACPI_SUCCESS(status)) {
640 obj_desc->device.gpe_block = NULL;
641 }
642
643 unlock_and_exit:
644 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
645 return_ACPI_STATUS(status);
646}
647
648ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block)
649
650/*******************************************************************************
651 *
652 * FUNCTION: acpi_get_gpe_device
653 *
654 * PARAMETERS: Index - System GPE index (0-current_gpe_count)
655 * gpe_device - Where the parent GPE Device is returned
656 *
657 * RETURN: Status
658 *
659 * DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
660 * gpe device indicates that the gpe number is contained in one of
661 * the FADT-defined gpe blocks. Otherwise, the GPE block device.
662 *
663 ******************************************************************************/
664acpi_status
665acpi_get_gpe_device(u32 index, acpi_handle *gpe_device)
666{
667 struct acpi_gpe_device_info info;
668 acpi_status status;
669
670 ACPI_FUNCTION_TRACE(acpi_get_gpe_device);
671
672 if (!gpe_device) {
673 return_ACPI_STATUS(AE_BAD_PARAMETER);
674 }
675
676 if (index >= acpi_current_gpe_count) {
677 return_ACPI_STATUS(AE_NOT_EXIST);
678 }
679
680 /* Setup and walk the GPE list */
681
682 info.index = index;
683 info.status = AE_NOT_EXIST;
684 info.gpe_device = NULL;
685 info.next_block_base_index = 0;
686
687 status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info);
688 if (ACPI_FAILURE(status)) {
689 return_ACPI_STATUS(status);
690 }
691
692 *gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device);
693 return_ACPI_STATUS(info.status);
694}
695
696ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-11 21:40:01 -0400