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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 const char *
 95 acpi_dev_get_first_match_name(const char *hid, const char *uid, s64 hrv);
 96 
 97 #ifdef CONFIG_ACPI
 98 
 99 #include <linux/proc_fs.h>
100 
101 #define ACPI_BUS_FILE_ROOT      "acpi"
102 extern struct proc_dir_entry *acpi_root_dir;
103 
104 enum acpi_bus_device_type {
105         ACPI_BUS_TYPE_DEVICE = 0,
106         ACPI_BUS_TYPE_POWER,
107         ACPI_BUS_TYPE_PROCESSOR,
108         ACPI_BUS_TYPE_THERMAL,
109         ACPI_BUS_TYPE_POWER_BUTTON,
110         ACPI_BUS_TYPE_SLEEP_BUTTON,
111         ACPI_BUS_TYPE_ECDT_EC,
112         ACPI_BUS_DEVICE_TYPE_COUNT
113 };
114 
115 struct acpi_driver;
116 struct acpi_device;
117 
118 /*
119  * ACPI Scan Handler
120  * -----------------
121  */
122 
123 struct acpi_hotplug_profile {
124         struct kobject kobj;
125         int (*scan_dependent)(struct acpi_device *adev);
126         void (*notify_online)(struct acpi_device *adev);
127         bool enabled:1;
128         bool demand_offline:1;
129 };
130 
131 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
132                                                 struct kobject *kobj)
133 {
134         return container_of(kobj, struct acpi_hotplug_profile, kobj);
135 }
136 
137 struct acpi_scan_handler {
138         const struct acpi_device_id *ids;
139         struct list_head list_node;
140         bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
141         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
142         void (*detach)(struct acpi_device *dev);
143         void (*bind)(struct device *phys_dev);
144         void (*unbind)(struct device *phys_dev);
145         struct acpi_hotplug_profile hotplug;
146 };
147 
148 /*
149  * ACPI Hotplug Context
150  * --------------------
151  */
152 
153 struct acpi_hotplug_context {
154         struct acpi_device *self;
155         int (*notify)(struct acpi_device *, u32);
156         void (*uevent)(struct acpi_device *, u32);
157         void (*fixup)(struct acpi_device *);
158 };
159 
160 /*
161  * ACPI Driver
162  * -----------
163  */
164 
165 typedef int (*acpi_op_add) (struct acpi_device * device);
166 typedef int (*acpi_op_remove) (struct acpi_device * device);
167 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
168 
169 struct acpi_device_ops {
170         acpi_op_add add;
171         acpi_op_remove remove;
172         acpi_op_notify notify;
173 };
174 
175 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
176 
177 struct acpi_driver {
178         char name[80];
179         char class[80];
180         const struct acpi_device_id *ids; /* Supported Hardware IDs */
181         unsigned int flags;
182         struct acpi_device_ops ops;
183         struct device_driver drv;
184         struct module *owner;
185 };
186 
187 /*
188  * ACPI Device
189  * -----------
190  */
191 
192 /* Status (_STA) */
193 
194 struct acpi_device_status {
195         u32 present:1;
196         u32 enabled:1;
197         u32 show_in_ui:1;
198         u32 functional:1;
199         u32 battery_present:1;
200         u32 reserved:27;
201 };
202 
203 /* Flags */
204 
205 struct acpi_device_flags {
206         u32 dynamic_status:1;
207         u32 removable:1;
208         u32 ejectable:1;
209         u32 power_manageable:1;
210         u32 match_driver:1;
211         u32 initialized:1;
212         u32 visited:1;
213         u32 hotplug_notify:1;
214         u32 is_dock_station:1;
215         u32 of_compatible_ok:1;
216         u32 coherent_dma:1;
217         u32 cca_seen:1;
218         u32 enumeration_by_parent:1;
219         u32 reserved:19;
220 };
221 
222 /* File System */
223 
224 struct acpi_device_dir {
225         struct proc_dir_entry *entry;
226 };
227 
228 #define acpi_device_dir(d)      ((d)->dir.entry)
229 
230 /* Plug and Play */
231 
232 typedef char acpi_bus_id[8];
233 typedef unsigned long acpi_bus_address;
234 typedef char acpi_device_name[40];
235 typedef char acpi_device_class[20];
236 
237 struct acpi_hardware_id {
238         struct list_head list;
239         const char *id;
240 };
241 
242 struct acpi_pnp_type {
243         u32 hardware_id:1;
244         u32 bus_address:1;
245         u32 platform_id:1;
246         u32 reserved:29;
247 };
248 
249 struct acpi_device_pnp {
250         acpi_bus_id bus_id;             /* Object name */
251         struct acpi_pnp_type type;      /* ID type */
252         acpi_bus_address bus_address;   /* _ADR */
253         char *unique_id;                /* _UID */
254         struct list_head ids;           /* _HID and _CIDs */
255         acpi_device_name device_name;   /* Driver-determined */
256         acpi_device_class device_class; /*        "          */
257         union acpi_object *str_obj;     /* unicode string for _STR method */
258 };
259 
260 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
261 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
262 const char *acpi_device_hid(struct acpi_device *device);
263 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
264 #define acpi_device_name(d)     ((d)->pnp.device_name)
265 #define acpi_device_class(d)    ((d)->pnp.device_class)
266 
267 /* Power Management */
268 
269 struct acpi_device_power_flags {
270         u32 explicit_get:1;     /* _PSC present? */
271         u32 power_resources:1;  /* Power resources */
272         u32 inrush_current:1;   /* Serialize Dx->D0 */
273         u32 power_removed:1;    /* Optimize Dx->D0 */
274         u32 ignore_parent:1;    /* Power is independent of parent power state */
275         u32 dsw_present:1;      /* _DSW present? */
276         u32 reserved:26;
277 };
278 
279 struct acpi_device_power_state {
280         struct {
281                 u8 valid:1;
282                 u8 explicit_set:1;      /* _PSx present? */
283                 u8 reserved:6;
284         } flags;
285         int power;              /* % Power (compared to D0) */
286         int latency;            /* Dx->D0 time (microseconds) */
287         struct list_head resources;     /* Power resources referenced */
288 };
289 
290 struct acpi_device_power {
291         int state;              /* Current state */
292         struct acpi_device_power_flags flags;
293         struct acpi_device_power_state states[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
294 };
295 
296 /* Performance Management */
297 
298 struct acpi_device_perf_flags {
299         u8 reserved:8;
300 };
301 
302 struct acpi_device_perf_state {
303         struct {
304                 u8 valid:1;
305                 u8 reserved:7;
306         } flags;
307         u8 power;               /* % Power (compared to P0) */
308         u8 performance;         /* % Performance (    "   ) */
309         int latency;            /* Px->P0 time (microseconds) */
310 };
311 
312 struct acpi_device_perf {
313         int state;
314         struct acpi_device_perf_flags flags;
315         int state_count;
316         struct acpi_device_perf_state *states;
317 };
318 
319 /* Wakeup Management */
320 struct acpi_device_wakeup_flags {
321         u8 valid:1;             /* Can successfully enable wakeup? */
322         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
323 };
324 
325 struct acpi_device_wakeup_context {
326         void (*func)(struct acpi_device_wakeup_context *context);
327         struct device *dev;
328 };
329 
330 struct acpi_device_wakeup {
331         acpi_handle gpe_device;
332         u64 gpe_number;
333         u64 sleep_state;
334         struct list_head resources;
335         struct acpi_device_wakeup_flags flags;
336         struct acpi_device_wakeup_context context;
337         struct wakeup_source *ws;
338         int prepare_count;
339         int enable_count;
340 };
341 
342 struct acpi_device_physical_node {
343         unsigned int node_id;
344         struct list_head node;
345         struct device *dev;
346         bool put_online:1;
347 };
348 
349 struct acpi_device_properties {
350         const guid_t *guid;
351         const union acpi_object *properties;
352         struct list_head list;
353 };
354 
355 /* ACPI Device Specific Data (_DSD) */
356 struct acpi_device_data {
357         const union acpi_object *pointer;
358         struct list_head properties;
359         const union acpi_object *of_compatible;
360         struct list_head subnodes;
361 };
362 
363 struct acpi_gpio_mapping;
364 
365 /* Device */
366 struct acpi_device {
367         int device_type;
368         acpi_handle handle;             /* no handle for fixed hardware */
369         struct fwnode_handle fwnode;
370         struct acpi_device *parent;
371         struct list_head children;
372         struct list_head node;
373         struct list_head wakeup_list;
374         struct list_head del_list;
375         struct acpi_device_status status;
376         struct acpi_device_flags flags;
377         struct acpi_device_pnp pnp;
378         struct acpi_device_power power;
379         struct acpi_device_wakeup wakeup;
380         struct acpi_device_perf performance;
381         struct acpi_device_dir dir;
382         struct acpi_device_data data;
383         struct acpi_scan_handler *handler;
384         struct acpi_hotplug_context *hp;
385         struct acpi_driver *driver;
386         const struct acpi_gpio_mapping *driver_gpios;
387         void *driver_data;
388         struct device dev;
389         unsigned int physical_node_count;
390         unsigned int dep_unmet;
391         struct list_head physical_node_list;
392         struct mutex physical_node_lock;
393         void (*remove)(struct acpi_device *);
394 };
395 
396 /* Non-device subnode */
397 struct acpi_data_node {
398         const char *name;
399         acpi_handle handle;
400         struct fwnode_handle fwnode;
401         struct fwnode_handle *parent;
402         struct acpi_device_data data;
403         struct list_head sibling;
404         struct kobject kobj;
405         struct completion kobj_done;
406 };
407 
408 extern const struct fwnode_operations acpi_device_fwnode_ops;
409 extern const struct fwnode_operations acpi_data_fwnode_ops;
410 extern const struct fwnode_operations acpi_static_fwnode_ops;
411 
412 bool is_acpi_device_node(const struct fwnode_handle *fwnode);
413 bool is_acpi_data_node(const struct fwnode_handle *fwnode);
414 
415 static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
416 {
417         return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
418 }
419 
420 #define to_acpi_device_node(__fwnode)                                   \
421         ({                                                              \
422                 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
423                                                                         \
424                 is_acpi_device_node(__to_acpi_device_node_fwnode) ?     \
425                         container_of(__to_acpi_device_node_fwnode,      \
426                                      struct acpi_device, fwnode) :      \
427                         NULL;                                           \
428         })
429 
430 #define to_acpi_data_node(__fwnode)                                     \
431         ({                                                              \
432                 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
433                                                                         \
434                 is_acpi_data_node(__to_acpi_data_node_fwnode) ?         \
435                         container_of(__to_acpi_data_node_fwnode,        \
436                                      struct acpi_data_node, fwnode) :   \
437                         NULL;                                           \
438         })
439 
440 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
441 {
442         return !IS_ERR_OR_NULL(fwnode) &&
443                 fwnode->ops == &acpi_static_fwnode_ops;
444 }
445 
446 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
447                                         const char *name)
448 {
449         return is_acpi_data_node(fwnode) ?
450                 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
451 }
452 
453 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
454 {
455         return &adev->fwnode;
456 }
457 
458 static inline void *acpi_driver_data(struct acpi_device *d)
459 {
460         return d->driver_data;
461 }
462 
463 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
464 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
465 
466 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
467 {
468         *((u32 *)&adev->status) = sta;
469 }
470 
471 static inline void acpi_set_hp_context(struct acpi_device *adev,
472                                        struct acpi_hotplug_context *hp)
473 {
474         hp->self = adev;
475         adev->hp = hp;
476 }
477 
478 void acpi_initialize_hp_context(struct acpi_device *adev,
479                                 struct acpi_hotplug_context *hp,
480                                 int (*notify)(struct acpi_device *, u32),
481                                 void (*uevent)(struct acpi_device *, u32));
482 
483 /* acpi_device.dev.bus == &acpi_bus_type */
484 extern struct bus_type acpi_bus_type;
485 
486 /*
487  * Events
488  * ------
489  */
490 
491 struct acpi_bus_event {
492         struct list_head node;
493         acpi_device_class device_class;
494         acpi_bus_id bus_id;
495         u32 type;
496         u32 data;
497 };
498 
499 extern struct kobject *acpi_kobj;
500 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
501 void acpi_bus_private_data_handler(acpi_handle, void *);
502 int acpi_bus_get_private_data(acpi_handle, void **);
503 int acpi_bus_attach_private_data(acpi_handle, void *);
504 void acpi_bus_detach_private_data(acpi_handle);
505 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
506 extern int register_acpi_notifier(struct notifier_block *);
507 extern int unregister_acpi_notifier(struct notifier_block *);
508 
509 /*
510  * External Functions
511  */
512 
513 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
514 struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
515 void acpi_bus_put_acpi_device(struct acpi_device *adev);
516 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
517                                        unsigned long long *sta);
518 int acpi_bus_get_status(struct acpi_device *device);
519 
520 int acpi_bus_set_power(acpi_handle handle, int state);
521 const char *acpi_power_state_string(int state);
522 int acpi_device_get_power(struct acpi_device *device, int *state);
523 int acpi_device_set_power(struct acpi_device *device, int state);
524 int acpi_bus_init_power(struct acpi_device *device);
525 int acpi_device_fix_up_power(struct acpi_device *device);
526 int acpi_bus_update_power(acpi_handle handle, int *state_p);
527 int acpi_device_update_power(struct acpi_device *device, int *state_p);
528 bool acpi_bus_power_manageable(acpi_handle handle);
529 
530 #ifdef CONFIG_PM
531 bool acpi_bus_can_wakeup(acpi_handle handle);
532 #else
533 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
534 #endif
535 
536 void acpi_scan_lock_acquire(void);
537 void acpi_scan_lock_release(void);
538 void acpi_lock_hp_context(void);
539 void acpi_unlock_hp_context(void);
540 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
541 int acpi_bus_register_driver(struct acpi_driver *driver);
542 void acpi_bus_unregister_driver(struct acpi_driver *driver);
543 int acpi_bus_scan(acpi_handle handle);
544 void acpi_bus_trim(struct acpi_device *start);
545 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
546 int acpi_match_device_ids(struct acpi_device *device,
547                           const struct acpi_device_id *ids);
548 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
549                        char *modalias, size_t len);
550 int acpi_create_dir(struct acpi_device *);
551 void acpi_remove_dir(struct acpi_device *);
552 
553 static inline bool acpi_device_enumerated(struct acpi_device *adev)
554 {
555         return adev && adev->flags.initialized && adev->flags.visited;
556 }
557 
558 /**
559  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
560  * @__acpi_driver: acpi_driver struct
561  *
562  * Helper macro for ACPI drivers which do not do anything special in module
563  * init/exit. This eliminates a lot of boilerplate. Each module may only
564  * use this macro once, and calling it replaces module_init() and module_exit()
565  */
566 #define module_acpi_driver(__acpi_driver) \
567         module_driver(__acpi_driver, acpi_bus_register_driver, \
568                       acpi_bus_unregister_driver)
569 
570 /*
571  * Bind physical devices with ACPI devices
572  */
573 struct acpi_bus_type {
574         struct list_head list;
575         const char *name;
576         bool (*match)(struct device *dev);
577         struct acpi_device * (*find_companion)(struct device *);
578         void (*setup)(struct device *);
579         void (*cleanup)(struct device *);
580 };
581 int register_acpi_bus_type(struct acpi_bus_type *);
582 int unregister_acpi_bus_type(struct acpi_bus_type *);
583 int acpi_bind_one(struct device *dev, struct acpi_device *adev);
584 int acpi_unbind_one(struct device *dev);
585 
586 struct acpi_pci_root {
587         struct acpi_device * device;
588         struct pci_bus *bus;
589         u16 segment;
590         struct resource secondary;      /* downstream bus range */
591 
592         u32 osc_support_set;    /* _OSC state of support bits */
593         u32 osc_control_set;    /* _OSC state of control bits */
594         phys_addr_t mcfg_addr;
595 };
596 
597 /* helper */
598 
599 bool acpi_dma_supported(struct acpi_device *adev);
600 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
601 int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
602                        u64 *size);
603 int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr);
604 
605 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
606                                            u64 address, bool check_children);
607 int acpi_is_root_bridge(acpi_handle);
608 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
609 
610 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
611 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
612 
613 #ifdef CONFIG_X86
614 bool acpi_device_always_present(struct acpi_device *adev);
615 #else
616 static inline bool acpi_device_always_present(struct acpi_device *adev)
617 {
618         return false;
619 }
620 #endif
621 
622 #ifdef CONFIG_PM
623 void acpi_pm_wakeup_event(struct device *dev);
624 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
625                         void (*func)(struct acpi_device_wakeup_context *context));
626 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
627 bool acpi_pm_device_can_wakeup(struct device *dev);
628 int acpi_pm_device_sleep_state(struct device *, int *, int);
629 int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
630 int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable);
631 #else
632 static inline void acpi_pm_wakeup_event(struct device *dev)
633 {
634 }
635 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
636                                                struct device *dev,
637                                                void (*func)(struct acpi_device_wakeup_context *context))
638 {
639         return AE_SUPPORT;
640 }
641 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
642 {
643         return AE_SUPPORT;
644 }
645 static inline bool acpi_pm_device_can_wakeup(struct device *dev)
646 {
647         return false;
648 }
649 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
650 {
651         if (p)
652                 *p = ACPI_STATE_D0;
653 
654         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
655                 m : ACPI_STATE_D0;
656 }
657 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
658 {
659         return -ENODEV;
660 }
661 static inline int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable)
662 {
663         return -ENODEV;
664 }
665 #endif
666 
667 #ifdef CONFIG_ACPI_SLEEP
668 u32 acpi_target_system_state(void);
669 #else
670 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
671 #endif
672 
673 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
674 {
675         return adev->flags.power_manageable;
676 }
677 
678 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
679 {
680         return adev->wakeup.flags.valid;
681 }
682 
683 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
684 {
685         return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
686                 ((acpi_gbl_FADT.header.revision < 6) &&
687                 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
688 }
689 
690 #else   /* CONFIG_ACPI */
691 
692 static inline int register_acpi_bus_type(void *bus) { return 0; }
693 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
694 
695 #endif                          /* CONFIG_ACPI */
696 
697 #endif /*__ACPI_BUS_H__*/
698 

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