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TOMOYO Linux Cross Reference
Linux/include/acpi/acpi_bus.h

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  1 /*
  2  *  acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
  3  *
  4  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
  5  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@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 as published by
 11  *  the Free Software Foundation; either version 2 of the License, or (at
 12  *  your option) any later version.
 13  *
 14  *  This program is distributed in the hope that it will be useful, but
 15  *  WITHOUT ANY WARRANTY; without even the implied warranty of
 16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 17  *  General Public License for more details.
 18  *
 19  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 20  */
 21 
 22 #ifndef __ACPI_BUS_H__
 23 #define __ACPI_BUS_H__
 24 
 25 #include <linux/device.h>
 26 #include <linux/property.h>
 27 
 28 /* TBD: Make dynamic */
 29 #define ACPI_MAX_HANDLES        10
 30 struct acpi_handle_list {
 31         u32 count;
 32         acpi_handle handles[ACPI_MAX_HANDLES];
 33 };
 34 
 35 /* acpi_utils.h */
 36 acpi_status
 37 acpi_extract_package(union acpi_object *package,
 38                      struct acpi_buffer *format, struct acpi_buffer *buffer);
 39 acpi_status
 40 acpi_evaluate_integer(acpi_handle handle,
 41                       acpi_string pathname,
 42                       struct acpi_object_list *arguments, unsigned long long *data);
 43 acpi_status
 44 acpi_evaluate_reference(acpi_handle handle,
 45                         acpi_string pathname,
 46                         struct acpi_object_list *arguments,
 47                         struct acpi_handle_list *list);
 48 acpi_status
 49 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
 50                   struct acpi_buffer *status_buf);
 51 
 52 acpi_status
 53 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
 54 
 55 bool acpi_has_method(acpi_handle handle, char *name);
 56 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
 57                                        u64 arg);
 58 acpi_status acpi_evaluate_ej0(acpi_handle handle);
 59 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
 60 bool acpi_ata_match(acpi_handle handle);
 61 bool acpi_bay_match(acpi_handle handle);
 62 bool acpi_dock_match(acpi_handle handle);
 63 
 64 bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs);
 65 union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
 66                         u64 rev, u64 func, union acpi_object *argv4);
 67 
 68 static inline union acpi_object *
 69 acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
 70                         u64 func, union acpi_object *argv4,
 71                         acpi_object_type type)
 72 {
 73         union acpi_object *obj;
 74 
 75         obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4);
 76         if (obj && obj->type != type) {
 77                 ACPI_FREE(obj);
 78                 obj = NULL;
 79         }
 80 
 81         return obj;
 82 }
 83 
 84 #define ACPI_INIT_DSM_ARGV4(cnt, eles)                  \
 85         {                                               \
 86           .package.type = ACPI_TYPE_PACKAGE,            \
 87           .package.count = (cnt),                       \
 88           .package.elements = (eles)                    \
 89         }
 90 
 91 bool acpi_dev_found(const char *hid);
 92 bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
 93 
 94 #ifdef CONFIG_ACPI
 95 
 96 #include <linux/proc_fs.h>
 97 
 98 #define ACPI_BUS_FILE_ROOT      "acpi"
 99 extern struct proc_dir_entry *acpi_root_dir;
100 
101 enum acpi_bus_device_type {
102         ACPI_BUS_TYPE_DEVICE = 0,
103         ACPI_BUS_TYPE_POWER,
104         ACPI_BUS_TYPE_PROCESSOR,
105         ACPI_BUS_TYPE_THERMAL,
106         ACPI_BUS_TYPE_POWER_BUTTON,
107         ACPI_BUS_TYPE_SLEEP_BUTTON,
108         ACPI_BUS_TYPE_ECDT_EC,
109         ACPI_BUS_DEVICE_TYPE_COUNT
110 };
111 
112 struct acpi_driver;
113 struct acpi_device;
114 
115 /*
116  * ACPI Scan Handler
117  * -----------------
118  */
119 
120 struct acpi_hotplug_profile {
121         struct kobject kobj;
122         int (*scan_dependent)(struct acpi_device *adev);
123         void (*notify_online)(struct acpi_device *adev);
124         bool enabled:1;
125         bool demand_offline:1;
126 };
127 
128 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
129                                                 struct kobject *kobj)
130 {
131         return container_of(kobj, struct acpi_hotplug_profile, kobj);
132 }
133 
134 struct acpi_scan_handler {
135         const struct acpi_device_id *ids;
136         struct list_head list_node;
137         bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
138         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
139         void (*detach)(struct acpi_device *dev);
140         void (*bind)(struct device *phys_dev);
141         void (*unbind)(struct device *phys_dev);
142         struct acpi_hotplug_profile hotplug;
143 };
144 
145 /*
146  * ACPI Hotplug Context
147  * --------------------
148  */
149 
150 struct acpi_hotplug_context {
151         struct acpi_device *self;
152         int (*notify)(struct acpi_device *, u32);
153         void (*uevent)(struct acpi_device *, u32);
154         void (*fixup)(struct acpi_device *);
155 };
156 
157 /*
158  * ACPI Driver
159  * -----------
160  */
161 
162 typedef int (*acpi_op_add) (struct acpi_device * device);
163 typedef int (*acpi_op_remove) (struct acpi_device * device);
164 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
165 
166 struct acpi_device_ops {
167         acpi_op_add add;
168         acpi_op_remove remove;
169         acpi_op_notify notify;
170 };
171 
172 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
173 
174 struct acpi_driver {
175         char name[80];
176         char class[80];
177         const struct acpi_device_id *ids; /* Supported Hardware IDs */
178         unsigned int flags;
179         struct acpi_device_ops ops;
180         struct device_driver drv;
181         struct module *owner;
182 };
183 
184 /*
185  * ACPI Device
186  * -----------
187  */
188 
189 /* Status (_STA) */
190 
191 struct acpi_device_status {
192         u32 present:1;
193         u32 enabled:1;
194         u32 show_in_ui:1;
195         u32 functional:1;
196         u32 battery_present:1;
197         u32 reserved:27;
198 };
199 
200 /* Flags */
201 
202 struct acpi_device_flags {
203         u32 dynamic_status:1;
204         u32 removable:1;
205         u32 ejectable:1;
206         u32 power_manageable:1;
207         u32 match_driver:1;
208         u32 initialized:1;
209         u32 visited:1;
210         u32 hotplug_notify:1;
211         u32 is_dock_station:1;
212         u32 of_compatible_ok:1;
213         u32 coherent_dma:1;
214         u32 cca_seen:1;
215         u32 serial_bus_slave:1;
216         u32 reserved:19;
217 };
218 
219 /* File System */
220 
221 struct acpi_device_dir {
222         struct proc_dir_entry *entry;
223 };
224 
225 #define acpi_device_dir(d)      ((d)->dir.entry)
226 
227 /* Plug and Play */
228 
229 typedef char acpi_bus_id[8];
230 typedef unsigned long acpi_bus_address;
231 typedef char acpi_device_name[40];
232 typedef char acpi_device_class[20];
233 
234 struct acpi_hardware_id {
235         struct list_head list;
236         const char *id;
237 };
238 
239 struct acpi_pnp_type {
240         u32 hardware_id:1;
241         u32 bus_address:1;
242         u32 platform_id:1;
243         u32 reserved:29;
244 };
245 
246 struct acpi_device_pnp {
247         acpi_bus_id bus_id;             /* Object name */
248         struct acpi_pnp_type type;      /* ID type */
249         acpi_bus_address bus_address;   /* _ADR */
250         char *unique_id;                /* _UID */
251         struct list_head ids;           /* _HID and _CIDs */
252         acpi_device_name device_name;   /* Driver-determined */
253         acpi_device_class device_class; /*        "          */
254         union acpi_object *str_obj;     /* unicode string for _STR method */
255 };
256 
257 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
258 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
259 const char *acpi_device_hid(struct acpi_device *device);
260 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
261 #define acpi_device_name(d)     ((d)->pnp.device_name)
262 #define acpi_device_class(d)    ((d)->pnp.device_class)
263 
264 /* Power Management */
265 
266 struct acpi_device_power_flags {
267         u32 explicit_get:1;     /* _PSC present? */
268         u32 power_resources:1;  /* Power resources */
269         u32 inrush_current:1;   /* Serialize Dx->D0 */
270         u32 power_removed:1;    /* Optimize Dx->D0 */
271         u32 ignore_parent:1;    /* Power is independent of parent power state */
272         u32 dsw_present:1;      /* _DSW present? */
273         u32 reserved:26;
274 };
275 
276 struct acpi_device_power_state {
277         struct {
278                 u8 valid:1;
279                 u8 explicit_set:1;      /* _PSx present? */
280                 u8 reserved:6;
281         } flags;
282         int power;              /* % Power (compared to D0) */
283         int latency;            /* Dx->D0 time (microseconds) */
284         struct list_head resources;     /* Power resources referenced */
285 };
286 
287 struct acpi_device_power {
288         int state;              /* Current state */
289         struct acpi_device_power_flags flags;
290         struct acpi_device_power_state states[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
291 };
292 
293 /* Performance Management */
294 
295 struct acpi_device_perf_flags {
296         u8 reserved:8;
297 };
298 
299 struct acpi_device_perf_state {
300         struct {
301                 u8 valid:1;
302                 u8 reserved:7;
303         } flags;
304         u8 power;               /* % Power (compared to P0) */
305         u8 performance;         /* % Performance (    "   ) */
306         int latency;            /* Px->P0 time (microseconds) */
307 };
308 
309 struct acpi_device_perf {
310         int state;
311         struct acpi_device_perf_flags flags;
312         int state_count;
313         struct acpi_device_perf_state *states;
314 };
315 
316 /* Wakeup Management */
317 struct acpi_device_wakeup_flags {
318         u8 valid:1;             /* Can successfully enable wakeup? */
319         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
320 };
321 
322 struct acpi_device_wakeup_context {
323         void (*func)(struct acpi_device_wakeup_context *context);
324         struct device *dev;
325 };
326 
327 struct acpi_device_wakeup {
328         acpi_handle gpe_device;
329         u64 gpe_number;
330         u64 sleep_state;
331         struct list_head resources;
332         struct acpi_device_wakeup_flags flags;
333         struct acpi_device_wakeup_context context;
334         struct wakeup_source *ws;
335         int prepare_count;
336         int enable_count;
337 };
338 
339 struct acpi_device_physical_node {
340         unsigned int node_id;
341         struct list_head node;
342         struct device *dev;
343         bool put_online:1;
344 };
345 
346 /* ACPI Device Specific Data (_DSD) */
347 struct acpi_device_data {
348         const union acpi_object *pointer;
349         const union acpi_object *properties;
350         const union acpi_object *of_compatible;
351         struct list_head subnodes;
352 };
353 
354 struct acpi_gpio_mapping;
355 
356 /* Device */
357 struct acpi_device {
358         int device_type;
359         acpi_handle handle;             /* no handle for fixed hardware */
360         struct fwnode_handle fwnode;
361         struct acpi_device *parent;
362         struct list_head children;
363         struct list_head node;
364         struct list_head wakeup_list;
365         struct list_head del_list;
366         struct acpi_device_status status;
367         struct acpi_device_flags flags;
368         struct acpi_device_pnp pnp;
369         struct acpi_device_power power;
370         struct acpi_device_wakeup wakeup;
371         struct acpi_device_perf performance;
372         struct acpi_device_dir dir;
373         struct acpi_device_data data;
374         struct acpi_scan_handler *handler;
375         struct acpi_hotplug_context *hp;
376         struct acpi_driver *driver;
377         const struct acpi_gpio_mapping *driver_gpios;
378         void *driver_data;
379         struct device dev;
380         unsigned int physical_node_count;
381         unsigned int dep_unmet;
382         struct list_head physical_node_list;
383         struct mutex physical_node_lock;
384         void (*remove)(struct acpi_device *);
385 };
386 
387 /* Non-device subnode */
388 struct acpi_data_node {
389         const char *name;
390         acpi_handle handle;
391         struct fwnode_handle fwnode;
392         struct fwnode_handle *parent;
393         struct acpi_device_data data;
394         struct list_head sibling;
395         struct kobject kobj;
396         struct completion kobj_done;
397 };
398 
399 extern const struct fwnode_operations acpi_device_fwnode_ops;
400 extern const struct fwnode_operations acpi_data_fwnode_ops;
401 extern const struct fwnode_operations acpi_static_fwnode_ops;
402 
403 bool is_acpi_device_node(const struct fwnode_handle *fwnode);
404 bool is_acpi_data_node(const struct fwnode_handle *fwnode);
405 
406 static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
407 {
408         return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
409 }
410 
411 #define to_acpi_device_node(__fwnode)                                   \
412         ({                                                              \
413                 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
414                                                                         \
415                 is_acpi_device_node(__to_acpi_device_node_fwnode) ?     \
416                         container_of(__to_acpi_device_node_fwnode,      \
417                                      struct acpi_device, fwnode) :      \
418                         NULL;                                           \
419         })
420 
421 #define to_acpi_data_node(__fwnode)                                     \
422         ({                                                              \
423                 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
424                                                                         \
425                 is_acpi_data_node(__to_acpi_data_node_fwnode) ?         \
426                         container_of(__to_acpi_data_node_fwnode,        \
427                                      struct acpi_data_node, fwnode) :   \
428                         NULL;                                           \
429         })
430 
431 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
432 {
433         return !IS_ERR_OR_NULL(fwnode) &&
434                 fwnode->ops == &acpi_static_fwnode_ops;
435 }
436 
437 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
438                                         const char *name)
439 {
440         return is_acpi_data_node(fwnode) ?
441                 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
442 }
443 
444 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
445 {
446         return &adev->fwnode;
447 }
448 
449 static inline void *acpi_driver_data(struct acpi_device *d)
450 {
451         return d->driver_data;
452 }
453 
454 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
455 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
456 
457 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
458 {
459         *((u32 *)&adev->status) = sta;
460 }
461 
462 static inline void acpi_set_hp_context(struct acpi_device *adev,
463                                        struct acpi_hotplug_context *hp)
464 {
465         hp->self = adev;
466         adev->hp = hp;
467 }
468 
469 void acpi_initialize_hp_context(struct acpi_device *adev,
470                                 struct acpi_hotplug_context *hp,
471                                 int (*notify)(struct acpi_device *, u32),
472                                 void (*uevent)(struct acpi_device *, u32));
473 
474 /* acpi_device.dev.bus == &acpi_bus_type */
475 extern struct bus_type acpi_bus_type;
476 
477 /*
478  * Events
479  * ------
480  */
481 
482 struct acpi_bus_event {
483         struct list_head node;
484         acpi_device_class device_class;
485         acpi_bus_id bus_id;
486         u32 type;
487         u32 data;
488 };
489 
490 extern struct kobject *acpi_kobj;
491 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
492 void acpi_bus_private_data_handler(acpi_handle, void *);
493 int acpi_bus_get_private_data(acpi_handle, void **);
494 int acpi_bus_attach_private_data(acpi_handle, void *);
495 void acpi_bus_detach_private_data(acpi_handle);
496 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
497 extern int register_acpi_notifier(struct notifier_block *);
498 extern int unregister_acpi_notifier(struct notifier_block *);
499 
500 /*
501  * External Functions
502  */
503 
504 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
505 struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
506 void acpi_bus_put_acpi_device(struct acpi_device *adev);
507 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
508                                        unsigned long long *sta);
509 int acpi_bus_get_status(struct acpi_device *device);
510 
511 int acpi_bus_set_power(acpi_handle handle, int state);
512 const char *acpi_power_state_string(int state);
513 int acpi_device_get_power(struct acpi_device *device, int *state);
514 int acpi_device_set_power(struct acpi_device *device, int state);
515 int acpi_bus_init_power(struct acpi_device *device);
516 int acpi_device_fix_up_power(struct acpi_device *device);
517 int acpi_bus_update_power(acpi_handle handle, int *state_p);
518 int acpi_device_update_power(struct acpi_device *device, int *state_p);
519 bool acpi_bus_power_manageable(acpi_handle handle);
520 
521 #ifdef CONFIG_PM
522 bool acpi_bus_can_wakeup(acpi_handle handle);
523 #else
524 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
525 #endif
526 
527 void acpi_scan_lock_acquire(void);
528 void acpi_scan_lock_release(void);
529 void acpi_lock_hp_context(void);
530 void acpi_unlock_hp_context(void);
531 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
532 int acpi_bus_register_driver(struct acpi_driver *driver);
533 void acpi_bus_unregister_driver(struct acpi_driver *driver);
534 int acpi_bus_scan(acpi_handle handle);
535 void acpi_bus_trim(struct acpi_device *start);
536 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
537 int acpi_match_device_ids(struct acpi_device *device,
538                           const struct acpi_device_id *ids);
539 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
540                        char *modalias, size_t len);
541 int acpi_create_dir(struct acpi_device *);
542 void acpi_remove_dir(struct acpi_device *);
543 
544 static inline bool acpi_device_enumerated(struct acpi_device *adev)
545 {
546         return adev && adev->flags.initialized && adev->flags.visited;
547 }
548 
549 /**
550  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
551  * @__acpi_driver: acpi_driver struct
552  *
553  * Helper macro for ACPI drivers which do not do anything special in module
554  * init/exit. This eliminates a lot of boilerplate. Each module may only
555  * use this macro once, and calling it replaces module_init() and module_exit()
556  */
557 #define module_acpi_driver(__acpi_driver) \
558         module_driver(__acpi_driver, acpi_bus_register_driver, \
559                       acpi_bus_unregister_driver)
560 
561 /*
562  * Bind physical devices with ACPI devices
563  */
564 struct acpi_bus_type {
565         struct list_head list;
566         const char *name;
567         bool (*match)(struct device *dev);
568         struct acpi_device * (*find_companion)(struct device *);
569         void (*setup)(struct device *);
570         void (*cleanup)(struct device *);
571 };
572 int register_acpi_bus_type(struct acpi_bus_type *);
573 int unregister_acpi_bus_type(struct acpi_bus_type *);
574 int acpi_bind_one(struct device *dev, struct acpi_device *adev);
575 int acpi_unbind_one(struct device *dev);
576 
577 struct acpi_pci_root {
578         struct acpi_device * device;
579         struct pci_bus *bus;
580         u16 segment;
581         struct resource secondary;      /* downstream bus range */
582 
583         u32 osc_support_set;    /* _OSC state of support bits */
584         u32 osc_control_set;    /* _OSC state of control bits */
585         phys_addr_t mcfg_addr;
586 };
587 
588 /* helper */
589 
590 bool acpi_dma_supported(struct acpi_device *adev);
591 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
592 int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
593                        u64 *size);
594 int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr);
595 void acpi_dma_deconfigure(struct device *dev);
596 
597 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
598                                            u64 address, bool check_children);
599 int acpi_is_root_bridge(acpi_handle);
600 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
601 
602 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
603 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
604 
605 #ifdef CONFIG_X86
606 bool acpi_device_always_present(struct acpi_device *adev);
607 #else
608 static inline bool acpi_device_always_present(struct acpi_device *adev)
609 {
610         return false;
611 }
612 #endif
613 
614 #ifdef CONFIG_PM
615 void acpi_pm_wakeup_event(struct device *dev);
616 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
617                         void (*func)(struct acpi_device_wakeup_context *context));
618 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
619 bool acpi_pm_device_can_wakeup(struct device *dev);
620 int acpi_pm_device_sleep_state(struct device *, int *, int);
621 int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
622 int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable);
623 #else
624 static inline void acpi_pm_wakeup_event(struct device *dev)
625 {
626 }
627 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
628                                                struct device *dev,
629                                                void (*func)(struct acpi_device_wakeup_context *context))
630 {
631         return AE_SUPPORT;
632 }
633 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
634 {
635         return AE_SUPPORT;
636 }
637 static inline bool acpi_pm_device_can_wakeup(struct device *dev)
638 {
639         return false;
640 }
641 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
642 {
643         if (p)
644                 *p = ACPI_STATE_D0;
645 
646         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
647                 m : ACPI_STATE_D0;
648 }
649 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
650 {
651         return -ENODEV;
652 }
653 static inline int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable)
654 {
655         return -ENODEV;
656 }
657 #endif
658 
659 #ifdef CONFIG_ACPI_SLEEP
660 u32 acpi_target_system_state(void);
661 #else
662 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
663 #endif
664 
665 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
666 {
667         return adev->flags.power_manageable;
668 }
669 
670 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
671 {
672         return adev->wakeup.flags.valid;
673 }
674 
675 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
676 {
677         return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
678                 ((acpi_gbl_FADT.header.revision < 6) &&
679                 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
680 }
681 
682 #else   /* CONFIG_ACPI */
683 
684 static inline int register_acpi_bus_type(void *bus) { return 0; }
685 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
686 
687 #endif                          /* CONFIG_ACPI */
688 
689 #endif /*__ACPI_BUS_H__*/
690 

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