Merge remote-tracking branches 'regulator/fix/88pm800', 'regulator/fix/max8973',...
[linux-drm-fsl-dcu.git] / drivers / acpi / resource.c
1 /*
2  * drivers/acpi/resource.c - ACPI device resources interpretation.
3  *
4  * Copyright (C) 2012, Intel Corp.
5  * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
6  *
7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License version 2 as published
11  *  by the Free Software Foundation.
12  *
13  *  This program is distributed in the hope that it will be useful, but
14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  *  General Public License for more details.
17  *
18  *  You should have received a copy of the GNU General Public License along
19  *  with this program; if not, write to the Free Software Foundation, Inc.,
20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21  *
22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23  */
24
25 #include <linux/acpi.h>
26 #include <linux/device.h>
27 #include <linux/export.h>
28 #include <linux/ioport.h>
29 #include <linux/slab.h>
30
31 #ifdef CONFIG_X86
32 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
33 #else
34 #define valid_IRQ(i) (true)
35 #endif
36
37 static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
38 {
39         u64 reslen = end - start + 1;
40
41         /*
42          * CHECKME: len might be required to check versus a minimum
43          * length as well. 1 for io is fine, but for memory it does
44          * not make any sense at all.
45          * Note: some BIOSes report incorrect length for ACPI address space
46          * descriptor, so remove check of 'reslen == len' to avoid regression.
47          */
48         if (len && reslen && start <= end)
49                 return true;
50
51         pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
52                 io ? "io" : "mem", start, end, len);
53
54         return false;
55 }
56
57 static void acpi_dev_memresource_flags(struct resource *res, u64 len,
58                                        u8 write_protect)
59 {
60         res->flags = IORESOURCE_MEM;
61
62         if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
63                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
64
65         if (write_protect == ACPI_READ_WRITE_MEMORY)
66                 res->flags |= IORESOURCE_MEM_WRITEABLE;
67 }
68
69 static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
70                                      u8 write_protect)
71 {
72         res->start = start;
73         res->end = start + len - 1;
74         acpi_dev_memresource_flags(res, len, write_protect);
75 }
76
77 /**
78  * acpi_dev_resource_memory - Extract ACPI memory resource information.
79  * @ares: Input ACPI resource object.
80  * @res: Output generic resource object.
81  *
82  * Check if the given ACPI resource object represents a memory resource and
83  * if that's the case, use the information in it to populate the generic
84  * resource object pointed to by @res.
85  *
86  * Return:
87  * 1) false with res->flags setting to zero: not the expected resource type
88  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
89  * 3) true: valid assigned resource
90  */
91 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
92 {
93         struct acpi_resource_memory24 *memory24;
94         struct acpi_resource_memory32 *memory32;
95         struct acpi_resource_fixed_memory32 *fixed_memory32;
96
97         switch (ares->type) {
98         case ACPI_RESOURCE_TYPE_MEMORY24:
99                 memory24 = &ares->data.memory24;
100                 acpi_dev_get_memresource(res, memory24->minimum << 8,
101                                          memory24->address_length << 8,
102                                          memory24->write_protect);
103                 break;
104         case ACPI_RESOURCE_TYPE_MEMORY32:
105                 memory32 = &ares->data.memory32;
106                 acpi_dev_get_memresource(res, memory32->minimum,
107                                          memory32->address_length,
108                                          memory32->write_protect);
109                 break;
110         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
111                 fixed_memory32 = &ares->data.fixed_memory32;
112                 acpi_dev_get_memresource(res, fixed_memory32->address,
113                                          fixed_memory32->address_length,
114                                          fixed_memory32->write_protect);
115                 break;
116         default:
117                 res->flags = 0;
118                 return false;
119         }
120
121         return !(res->flags & IORESOURCE_DISABLED);
122 }
123 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
124
125 static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
126                                       u8 io_decode)
127 {
128         res->flags = IORESOURCE_IO;
129
130         if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
131                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
132
133         if (res->end >= 0x10003)
134                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
135
136         if (io_decode == ACPI_DECODE_16)
137                 res->flags |= IORESOURCE_IO_16BIT_ADDR;
138 }
139
140 static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
141                                     u8 io_decode)
142 {
143         res->start = start;
144         res->end = start + len - 1;
145         acpi_dev_ioresource_flags(res, len, io_decode);
146 }
147
148 /**
149  * acpi_dev_resource_io - Extract ACPI I/O resource information.
150  * @ares: Input ACPI resource object.
151  * @res: Output generic resource object.
152  *
153  * Check if the given ACPI resource object represents an I/O resource and
154  * if that's the case, use the information in it to populate the generic
155  * resource object pointed to by @res.
156  *
157  * Return:
158  * 1) false with res->flags setting to zero: not the expected resource type
159  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
160  * 3) true: valid assigned resource
161  */
162 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
163 {
164         struct acpi_resource_io *io;
165         struct acpi_resource_fixed_io *fixed_io;
166
167         switch (ares->type) {
168         case ACPI_RESOURCE_TYPE_IO:
169                 io = &ares->data.io;
170                 acpi_dev_get_ioresource(res, io->minimum,
171                                         io->address_length,
172                                         io->io_decode);
173                 break;
174         case ACPI_RESOURCE_TYPE_FIXED_IO:
175                 fixed_io = &ares->data.fixed_io;
176                 acpi_dev_get_ioresource(res, fixed_io->address,
177                                         fixed_io->address_length,
178                                         ACPI_DECODE_10);
179                 break;
180         default:
181                 res->flags = 0;
182                 return false;
183         }
184
185         return !(res->flags & IORESOURCE_DISABLED);
186 }
187 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
188
189 static bool acpi_decode_space(struct resource_win *win,
190                               struct acpi_resource_address *addr,
191                               struct acpi_address64_attribute *attr)
192 {
193         u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
194         bool wp = addr->info.mem.write_protect;
195         u64 len = attr->address_length;
196         u64 start, end, offset = 0;
197         struct resource *res = &win->res;
198
199         /*
200          * Filter out invalid descriptor according to ACPI Spec 5.0, section
201          * 6.4.3.5 Address Space Resource Descriptors.
202          */
203         if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
204             (addr->min_address_fixed && addr->max_address_fixed && !len))
205                 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
206                          addr->min_address_fixed, addr->max_address_fixed, len);
207
208         /*
209          * For bridges that translate addresses across the bridge,
210          * translation_offset is the offset that must be added to the
211          * address on the secondary side to obtain the address on the
212          * primary side. Non-bridge devices must list 0 for all Address
213          * Translation offset bits.
214          */
215         if (addr->producer_consumer == ACPI_PRODUCER)
216                 offset = attr->translation_offset;
217         else if (attr->translation_offset)
218                 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
219                          attr->translation_offset);
220         start = attr->minimum + offset;
221         end = attr->maximum + offset;
222
223         win->offset = offset;
224         res->start = start;
225         res->end = end;
226         if (sizeof(resource_size_t) < sizeof(u64) &&
227             (offset != win->offset || start != res->start || end != res->end)) {
228                 pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
229                         attr->minimum, attr->maximum);
230                 return false;
231         }
232
233         switch (addr->resource_type) {
234         case ACPI_MEMORY_RANGE:
235                 acpi_dev_memresource_flags(res, len, wp);
236                 break;
237         case ACPI_IO_RANGE:
238                 acpi_dev_ioresource_flags(res, len, iodec);
239                 break;
240         case ACPI_BUS_NUMBER_RANGE:
241                 res->flags = IORESOURCE_BUS;
242                 break;
243         default:
244                 return false;
245         }
246
247         if (addr->producer_consumer == ACPI_PRODUCER)
248                 res->flags |= IORESOURCE_WINDOW;
249
250         if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
251                 res->flags |= IORESOURCE_PREFETCH;
252
253         return !(res->flags & IORESOURCE_DISABLED);
254 }
255
256 /**
257  * acpi_dev_resource_address_space - Extract ACPI address space information.
258  * @ares: Input ACPI resource object.
259  * @win: Output generic resource object.
260  *
261  * Check if the given ACPI resource object represents an address space resource
262  * and if that's the case, use the information in it to populate the generic
263  * resource object pointed to by @win.
264  *
265  * Return:
266  * 1) false with win->res.flags setting to zero: not the expected resource type
267  * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
268  *    resource
269  * 3) true: valid assigned resource
270  */
271 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
272                                      struct resource_win *win)
273 {
274         struct acpi_resource_address64 addr;
275
276         win->res.flags = 0;
277         if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
278                 return false;
279
280         return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
281                                  &addr.address);
282 }
283 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
284
285 /**
286  * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
287  * @ares: Input ACPI resource object.
288  * @win: Output generic resource object.
289  *
290  * Check if the given ACPI resource object represents an extended address space
291  * resource and if that's the case, use the information in it to populate the
292  * generic resource object pointed to by @win.
293  *
294  * Return:
295  * 1) false with win->res.flags setting to zero: not the expected resource type
296  * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
297  *    resource
298  * 3) true: valid assigned resource
299  */
300 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
301                                          struct resource_win *win)
302 {
303         struct acpi_resource_extended_address64 *ext_addr;
304
305         win->res.flags = 0;
306         if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
307                 return false;
308
309         ext_addr = &ares->data.ext_address64;
310
311         return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
312                                  &ext_addr->address);
313 }
314 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
315
316 /**
317  * acpi_dev_irq_flags - Determine IRQ resource flags.
318  * @triggering: Triggering type as provided by ACPI.
319  * @polarity: Interrupt polarity as provided by ACPI.
320  * @shareable: Whether or not the interrupt is shareable.
321  */
322 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
323 {
324         unsigned long flags;
325
326         if (triggering == ACPI_LEVEL_SENSITIVE)
327                 flags = polarity == ACPI_ACTIVE_LOW ?
328                         IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
329         else
330                 flags = polarity == ACPI_ACTIVE_LOW ?
331                         IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
332
333         if (shareable == ACPI_SHARED)
334                 flags |= IORESOURCE_IRQ_SHAREABLE;
335
336         return flags | IORESOURCE_IRQ;
337 }
338 EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
339
340 static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
341 {
342         res->start = gsi;
343         res->end = gsi;
344         res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
345 }
346
347 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
348                                      u8 triggering, u8 polarity, u8 shareable,
349                                      bool legacy)
350 {
351         int irq, p, t;
352
353         if (!valid_IRQ(gsi)) {
354                 acpi_dev_irqresource_disabled(res, gsi);
355                 return;
356         }
357
358         /*
359          * In IO-APIC mode, use overrided attribute. Two reasons:
360          * 1. BIOS bug in DSDT
361          * 2. BIOS uses IO-APIC mode Interrupt Source Override
362          *
363          * We do this only if we are dealing with IRQ() or IRQNoFlags()
364          * resource (the legacy ISA resources). With modern ACPI 5 devices
365          * using extended IRQ descriptors we take the IRQ configuration
366          * from _CRS directly.
367          */
368         if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
369                 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
370                 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
371
372                 if (triggering != trig || polarity != pol) {
373                         pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi,
374                                    t ? "level" : "edge", p ? "low" : "high");
375                         triggering = trig;
376                         polarity = pol;
377                 }
378         }
379
380         res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
381         irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
382         if (irq >= 0) {
383                 res->start = irq;
384                 res->end = irq;
385         } else {
386                 acpi_dev_irqresource_disabled(res, gsi);
387         }
388 }
389
390 /**
391  * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
392  * @ares: Input ACPI resource object.
393  * @index: Index into the array of GSIs represented by the resource.
394  * @res: Output generic resource object.
395  *
396  * Check if the given ACPI resource object represents an interrupt resource
397  * and @index does not exceed the resource's interrupt count (true is returned
398  * in that case regardless of the results of the other checks)).  If that's the
399  * case, register the GSI corresponding to @index from the array of interrupts
400  * represented by the resource and populate the generic resource object pointed
401  * to by @res accordingly.  If the registration of the GSI is not successful,
402  * IORESOURCE_DISABLED will be set it that object's flags.
403  *
404  * Return:
405  * 1) false with res->flags setting to zero: not the expected resource type
406  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
407  * 3) true: valid assigned resource
408  */
409 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
410                                  struct resource *res)
411 {
412         struct acpi_resource_irq *irq;
413         struct acpi_resource_extended_irq *ext_irq;
414
415         switch (ares->type) {
416         case ACPI_RESOURCE_TYPE_IRQ:
417                 /*
418                  * Per spec, only one interrupt per descriptor is allowed in
419                  * _CRS, but some firmware violates this, so parse them all.
420                  */
421                 irq = &ares->data.irq;
422                 if (index >= irq->interrupt_count) {
423                         acpi_dev_irqresource_disabled(res, 0);
424                         return false;
425                 }
426                 acpi_dev_get_irqresource(res, irq->interrupts[index],
427                                          irq->triggering, irq->polarity,
428                                          irq->sharable, true);
429                 break;
430         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
431                 ext_irq = &ares->data.extended_irq;
432                 if (index >= ext_irq->interrupt_count) {
433                         acpi_dev_irqresource_disabled(res, 0);
434                         return false;
435                 }
436                 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
437                                          ext_irq->triggering, ext_irq->polarity,
438                                          ext_irq->sharable, false);
439                 break;
440         default:
441                 res->flags = 0;
442                 return false;
443         }
444
445         return true;
446 }
447 EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
448
449 /**
450  * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
451  * @list: The head of the resource list to free.
452  */
453 void acpi_dev_free_resource_list(struct list_head *list)
454 {
455         resource_list_free(list);
456 }
457 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
458
459 struct res_proc_context {
460         struct list_head *list;
461         int (*preproc)(struct acpi_resource *, void *);
462         void *preproc_data;
463         int count;
464         int error;
465 };
466
467 static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
468                                                struct res_proc_context *c)
469 {
470         struct resource_entry *rentry;
471
472         rentry = resource_list_create_entry(NULL, 0);
473         if (!rentry) {
474                 c->error = -ENOMEM;
475                 return AE_NO_MEMORY;
476         }
477         *rentry->res = win->res;
478         rentry->offset = win->offset;
479         resource_list_add_tail(rentry, c->list);
480         c->count++;
481         return AE_OK;
482 }
483
484 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
485                                              void *context)
486 {
487         struct res_proc_context *c = context;
488         struct resource_win win;
489         struct resource *res = &win.res;
490         int i;
491
492         if (c->preproc) {
493                 int ret;
494
495                 ret = c->preproc(ares, c->preproc_data);
496                 if (ret < 0) {
497                         c->error = ret;
498                         return AE_CTRL_TERMINATE;
499                 } else if (ret > 0) {
500                         return AE_OK;
501                 }
502         }
503
504         memset(&win, 0, sizeof(win));
505
506         if (acpi_dev_resource_memory(ares, res)
507             || acpi_dev_resource_io(ares, res)
508             || acpi_dev_resource_address_space(ares, &win)
509             || acpi_dev_resource_ext_address_space(ares, &win))
510                 return acpi_dev_new_resource_entry(&win, c);
511
512         for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
513                 acpi_status status;
514
515                 status = acpi_dev_new_resource_entry(&win, c);
516                 if (ACPI_FAILURE(status))
517                         return status;
518         }
519
520         return AE_OK;
521 }
522
523 /**
524  * acpi_dev_get_resources - Get current resources of a device.
525  * @adev: ACPI device node to get the resources for.
526  * @list: Head of the resultant list of resources (must be empty).
527  * @preproc: The caller's preprocessing routine.
528  * @preproc_data: Pointer passed to the caller's preprocessing routine.
529  *
530  * Evaluate the _CRS method for the given device node and process its output by
531  * (1) executing the @preproc() rountine provided by the caller, passing the
532  * resource pointer and @preproc_data to it as arguments, for each ACPI resource
533  * returned and (2) converting all of the returned ACPI resources into struct
534  * resource objects if possible.  If the return value of @preproc() in step (1)
535  * is different from 0, step (2) is not applied to the given ACPI resource and
536  * if that value is negative, the whole processing is aborted and that value is
537  * returned as the final error code.
538  *
539  * The resultant struct resource objects are put on the list pointed to by
540  * @list, that must be empty initially, as members of struct resource_entry
541  * objects.  Callers of this routine should use %acpi_dev_free_resource_list() to
542  * free that list.
543  *
544  * The number of resources in the output list is returned on success, an error
545  * code reflecting the error condition is returned otherwise.
546  */
547 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
548                            int (*preproc)(struct acpi_resource *, void *),
549                            void *preproc_data)
550 {
551         struct res_proc_context c;
552         acpi_status status;
553
554         if (!adev || !adev->handle || !list_empty(list))
555                 return -EINVAL;
556
557         if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
558                 return 0;
559
560         c.list = list;
561         c.preproc = preproc;
562         c.preproc_data = preproc_data;
563         c.count = 0;
564         c.error = 0;
565         status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
566                                      acpi_dev_process_resource, &c);
567         if (ACPI_FAILURE(status)) {
568                 acpi_dev_free_resource_list(list);
569                 return c.error ? c.error : -EIO;
570         }
571
572         return c.count;
573 }
574 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
575
576 /**
577  * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
578  *                                 types
579  * @ares: Input ACPI resource object.
580  * @types: Valid resource types of IORESOURCE_XXX
581  *
582  * This is a helper function to support acpi_dev_get_resources(), which filters
583  * ACPI resource objects according to resource types.
584  */
585 int acpi_dev_filter_resource_type(struct acpi_resource *ares,
586                                   unsigned long types)
587 {
588         unsigned long type = 0;
589
590         switch (ares->type) {
591         case ACPI_RESOURCE_TYPE_MEMORY24:
592         case ACPI_RESOURCE_TYPE_MEMORY32:
593         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
594                 type = IORESOURCE_MEM;
595                 break;
596         case ACPI_RESOURCE_TYPE_IO:
597         case ACPI_RESOURCE_TYPE_FIXED_IO:
598                 type = IORESOURCE_IO;
599                 break;
600         case ACPI_RESOURCE_TYPE_IRQ:
601         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
602                 type = IORESOURCE_IRQ;
603                 break;
604         case ACPI_RESOURCE_TYPE_DMA:
605         case ACPI_RESOURCE_TYPE_FIXED_DMA:
606                 type = IORESOURCE_DMA;
607                 break;
608         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
609                 type = IORESOURCE_REG;
610                 break;
611         case ACPI_RESOURCE_TYPE_ADDRESS16:
612         case ACPI_RESOURCE_TYPE_ADDRESS32:
613         case ACPI_RESOURCE_TYPE_ADDRESS64:
614         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
615                 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
616                         type = IORESOURCE_MEM;
617                 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
618                         type = IORESOURCE_IO;
619                 else if (ares->data.address.resource_type ==
620                          ACPI_BUS_NUMBER_RANGE)
621                         type = IORESOURCE_BUS;
622                 break;
623         default:
624                 break;
625         }
626
627         return (type & types) ? 0 : 1;
628 }
629 EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);