include/acpi/acpi_bus.h

   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_DEVICE_TYPE_COUNT
 109 };
 110
 111 struct acpi_driver;
 112 struct acpi_device;
 113
 114 /*
 115  * ACPI Scan Handler
 116  * -----------------
 117  */
 118
 119 struct acpi_hotplug_profile {
 120         struct kobject kobj;
 121         int (*scan_dependent)(struct acpi_device *adev);
 122         void (*notify_online)(struct acpi_device *adev);
 123         bool enabled:1;
 124         bool demand_offline:1;
 125 };
 126
 127 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
 128                                                 struct kobject *kobj)
 129 {
 130         return container_of(kobj, struct acpi_hotplug_profile, kobj);
 131 }
 132
 133 struct acpi_scan_handler {
 134         const struct acpi_device_id *ids;
 135         struct list_head list_node;
 136         bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
 137         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
 138         void (*detach)(struct acpi_device *dev);
 139         void (*bind)(struct device *phys_dev);
 140         void (*unbind)(struct device *phys_dev);
 141         struct acpi_hotplug_profile hotplug;
 142 };
 143
 144 /*
 145  * ACPI Hotplug Context
 146  * --------------------
 147  */
 148
 149 struct acpi_hotplug_context {
 150         struct acpi_device *self;
 151         int (*notify)(struct acpi_device *, u32);
 152         void (*uevent)(struct acpi_device *, u32);
 153         void (*fixup)(struct acpi_device *);
 154 };
 155
 156 /*
 157  * ACPI Driver
 158  * -----------
 159  */
 160
 161 typedef int (*acpi_op_add) (struct acpi_device * device);
 162 typedef int (*acpi_op_remove) (struct acpi_device * device);
 163 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
 164
 165 struct acpi_device_ops {
 166         acpi_op_add add;
 167         acpi_op_remove remove;
 168         acpi_op_notify notify;
 169 };
 170
 171 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
 172
 173 struct acpi_driver {
 174         char name[80];
 175         char class[80];
 176         const struct acpi_device_id *ids; /* Supported Hardware IDs */
 177         unsigned int flags;
 178         struct acpi_device_ops ops;
 179         struct device_driver drv;
 180         struct module *owner;
 181 };
 182
 183 /*
 184  * ACPI Device
 185  * -----------
 186  */
 187
 188 /* Status (_STA) */
 189
 190 struct acpi_device_status {
 191         u32 present:1;
 192         u32 enabled:1;
 193         u32 show_in_ui:1;
 194         u32 functional:1;
 195         u32 battery_present:1;
 196         u32 reserved:27;
 197 };
 198
 199 /* Flags */
 200
 201 struct acpi_device_flags {
 202         u32 dynamic_status:1;
 203         u32 removable:1;
 204         u32 ejectable:1;
 205         u32 power_manageable:1;
 206         u32 match_driver:1;
 207         u32 initialized:1;
 208         u32 visited:1;
 209         u32 hotplug_notify:1;
 210         u32 is_dock_station:1;
 211         u32 of_compatible_ok:1;
 212         u32 coherent_dma:1;
 213         u32 cca_seen:1;
 214         u32 spi_i2c_slave:1;
 215         u32 reserved:19;
 216 };
 217
 218 /* File System */
 219
 220 struct acpi_device_dir {
 221         struct proc_dir_entry *entry;
 222 };
 223
 224 #define acpi_device_dir(d)      ((d)->dir.entry)
 225
 226 /* Plug and Play */
 227
 228 typedef char acpi_bus_id[8];
 229 typedef unsigned long acpi_bus_address;
 230 typedef char acpi_device_name[40];
 231 typedef char acpi_device_class[20];
 232
 233 struct acpi_hardware_id {
 234         struct list_head list;
 235         const char *id;
 236 };
 237
 238 struct acpi_pnp_type {
 239         u32 hardware_id:1;
 240         u32 bus_address:1;
 241         u32 platform_id:1;
 242         u32 reserved:29;
 243 };
 244
 245 struct acpi_device_pnp {
 246         acpi_bus_id bus_id;             /* Object name */
 247         struct acpi_pnp_type type;      /* ID type */
 248         acpi_bus_address bus_address;   /* _ADR */
 249         char *unique_id;                /* _UID */
 250         struct list_head ids;           /* _HID and _CIDs */
 251         acpi_device_name device_name;   /* Driver-determined */
 252         acpi_device_class device_class; /*        "          */
 253         union acpi_object *str_obj;     /* unicode string for _STR method */
 254 };
 255
 256 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
 257 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
 258 const char *acpi_device_hid(struct acpi_device *device);
 259 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
 260 #define acpi_device_name(d)     ((d)->pnp.device_name)
 261 #define acpi_device_class(d)    ((d)->pnp.device_class)
 262
 263 /* Power Management */
 264
 265 struct acpi_device_power_flags {
 266         u32 explicit_get:1;     /* _PSC present? */
 267         u32 power_resources:1;  /* Power resources */
 268         u32 inrush_current:1;   /* Serialize Dx->D0 */
 269         u32 power_removed:1;    /* Optimize Dx->D0 */
 270         u32 ignore_parent:1;    /* Power is independent of parent power state */
 271         u32 dsw_present:1;      /* _DSW present? */
 272         u32 reserved:26;
 273 };
 274
 275 struct acpi_device_power_state {
 276         struct {
 277                 u8 valid:1;
 278                 u8 explicit_set:1;      /* _PSx present? */
 279                 u8 reserved:6;
 280         } flags;
 281         int power;              /* % Power (compared to D0) */
 282         int latency;            /* Dx->D0 time (microseconds) */
 283         struct list_head resources;     /* Power resources referenced */
 284 };
 285
 286 struct acpi_device_power {
 287         int state;              /* Current state */
 288         struct acpi_device_power_flags flags;
 289         struct acpi_device_power_state states[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
 290 };
 291
 292 /* Performance Management */
 293
 294 struct acpi_device_perf_flags {
 295         u8 reserved:8;
 296 };
 297
 298 struct acpi_device_perf_state {
 299         struct {
 300                 u8 valid:1;
 301                 u8 reserved:7;
 302         } flags;
 303         u8 power;               /* % Power (compared to P0) */
 304         u8 performance;         /* % Performance (    "   ) */
 305         int latency;            /* Px->P0 time (microseconds) */
 306 };
 307
 308 struct acpi_device_perf {
 309         int state;
 310         struct acpi_device_perf_flags flags;
 311         int state_count;
 312         struct acpi_device_perf_state *states;
 313 };
 314
 315 /* Wakeup Management */
 316 struct acpi_device_wakeup_flags {
 317         u8 valid:1;             /* Can successfully enable wakeup? */
 318         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
 319         u8 enabled:1;           /* Enabled for wakeup */
 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 };
 337
 338 struct acpi_device_physical_node {
 339         unsigned int node_id;
 340         struct list_head node;
 341         struct device *dev;
 342         bool put_online:1;
 343 };
 344
 345 /* ACPI Device Specific Data (_DSD) */
 346 struct acpi_device_data {
 347         const union acpi_object *pointer;
 348         const union acpi_object *properties;
 349         const union acpi_object *of_compatible;
 350         struct list_head subnodes;
 351 };
 352
 353 struct acpi_gpio_mapping;
 354
 355 /* Device */
 356 struct acpi_device {
 357         int device_type;
 358         acpi_handle handle;             /* no handle for fixed hardware */
 359         struct fwnode_handle fwnode;
 360         struct acpi_device *parent;
 361         struct list_head children;
 362         struct list_head node;
 363         struct list_head wakeup_list;
 364         struct list_head del_list;
 365         struct acpi_device_status status;
 366         struct acpi_device_flags flags;
 367         struct acpi_device_pnp pnp;
 368         struct acpi_device_power power;
 369         struct acpi_device_wakeup wakeup;
 370         struct acpi_device_perf performance;
 371         struct acpi_device_dir dir;
 372         struct acpi_device_data data;
 373         struct acpi_scan_handler *handler;
 374         struct acpi_hotplug_context *hp;
 375         struct acpi_driver *driver;
 376         const struct acpi_gpio_mapping *driver_gpios;
 377         void *driver_data;
 378         struct device dev;
 379         unsigned int physical_node_count;
 380         unsigned int dep_unmet;
 381         struct list_head physical_node_list;
 382         struct mutex physical_node_lock;
 383         void (*remove)(struct acpi_device *);
 384 };
 385
 386 /* Non-device subnode */
 387 struct acpi_data_node {
 388         const char *name;
 389         acpi_handle handle;
 390         struct fwnode_handle fwnode;
 391         struct fwnode_handle *parent;
 392         struct acpi_device_data data;
 393         struct list_head sibling;
 394         struct kobject kobj;
 395         struct completion kobj_done;
 396 };
 397
 398 static inline bool is_acpi_node(struct fwnode_handle *fwnode)
 399 {
 400         return !IS_ERR_OR_NULL(fwnode) && (fwnode->type == FWNODE_ACPI
 401                 || fwnode->type == FWNODE_ACPI_DATA);
 402 }
 403
 404 static inline bool is_acpi_device_node(struct fwnode_handle *fwnode)
 405 {
 406         return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_ACPI;
 407 }
 408
 409 static inline struct acpi_device *to_acpi_device_node(struct fwnode_handle *fwnode)
 410 {
 411         return is_acpi_device_node(fwnode) ?
 412                 container_of(fwnode, struct acpi_device, fwnode) : NULL;
 413 }
 414
 415 static inline bool is_acpi_data_node(struct fwnode_handle *fwnode)
 416 {
 417         return fwnode && fwnode->type == FWNODE_ACPI_DATA;
 418 }
 419
 420 static inline struct acpi_data_node *to_acpi_data_node(struct fwnode_handle *fwnode)
 421 {
 422         return is_acpi_data_node(fwnode) ?
 423                 container_of(fwnode, struct acpi_data_node, fwnode) : NULL;
 424 }
 425
 426 static inline bool acpi_data_node_match(struct fwnode_handle *fwnode,
 427                                         const char *name)
 428 {
 429         return is_acpi_data_node(fwnode) ?
 430                 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
 431 }
 432
 433 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
 434 {
 435         return &adev->fwnode;
 436 }
 437
 438 static inline void *acpi_driver_data(struct acpi_device *d)
 439 {
 440         return d->driver_data;
 441 }
 442
 443 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
 444 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
 445
 446 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
 447 {
 448         *((u32 *)&adev->status) = sta;
 449 }
 450
 451 static inline void acpi_set_hp_context(struct acpi_device *adev,
 452                                        struct acpi_hotplug_context *hp)
 453 {
 454         hp->self = adev;
 455         adev->hp = hp;
 456 }
 457
 458 void acpi_initialize_hp_context(struct acpi_device *adev,
 459                                 struct acpi_hotplug_context *hp,
 460                                 int (*notify)(struct acpi_device *, u32),
 461                                 void (*uevent)(struct acpi_device *, u32));
 462
 463 /* acpi_device.dev.bus == &acpi_bus_type */
 464 extern struct bus_type acpi_bus_type;
 465
 466 /*
 467  * Events
 468  * ------
 469  */
 470
 471 struct acpi_bus_event {
 472         struct list_head node;
 473         acpi_device_class device_class;
 474         acpi_bus_id bus_id;
 475         u32 type;
 476         u32 data;
 477 };
 478
 479 extern struct kobject *acpi_kobj;
 480 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 481 void acpi_bus_private_data_handler(acpi_handle, void *);
 482 int acpi_bus_get_private_data(acpi_handle, void **);
 483 int acpi_bus_attach_private_data(acpi_handle, void *);
 484 void acpi_bus_detach_private_data(acpi_handle);
 485 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 486 extern int register_acpi_notifier(struct notifier_block *);
 487 extern int unregister_acpi_notifier(struct notifier_block *);
 488
 489 /*
 490  * External Functions
 491  */
 492
 493 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 494 struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
 495 void acpi_bus_put_acpi_device(struct acpi_device *adev);
 496 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
 497                                        unsigned long long *sta);
 498 int acpi_bus_get_status(struct acpi_device *device);
 499
 500 int acpi_bus_set_power(acpi_handle handle, int state);
 501 const char *acpi_power_state_string(int state);
 502 int acpi_device_get_power(struct acpi_device *device, int *state);
 503 int acpi_device_set_power(struct acpi_device *device, int state);
 504 int acpi_bus_init_power(struct acpi_device *device);
 505 int acpi_device_fix_up_power(struct acpi_device *device);
 506 int acpi_bus_update_power(acpi_handle handle, int *state_p);
 507 int acpi_device_update_power(struct acpi_device *device, int *state_p);
 508 bool acpi_bus_power_manageable(acpi_handle handle);
 509
 510 #ifdef CONFIG_PM
 511 bool acpi_bus_can_wakeup(acpi_handle handle);
 512 #else
 513 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
 514 #endif
 515
 516 void acpi_scan_lock_acquire(void);
 517 void acpi_scan_lock_release(void);
 518 void acpi_lock_hp_context(void);
 519 void acpi_unlock_hp_context(void);
 520 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
 521 int acpi_bus_register_driver(struct acpi_driver *driver);
 522 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 523 int acpi_bus_scan(acpi_handle handle);
 524 void acpi_bus_trim(struct acpi_device *start);
 525 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 526 int acpi_match_device_ids(struct acpi_device *device,
 527                           const struct acpi_device_id *ids);
 528 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
 529                        char *modalias, size_t len);
 530 int acpi_create_dir(struct acpi_device *);
 531 void acpi_remove_dir(struct acpi_device *);
 532
 533 static inline bool acpi_device_enumerated(struct acpi_device *adev)
 534 {
 535         return adev && adev->flags.initialized && adev->flags.visited;
 536 }
 537
 538 /**
 539  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
 540  * @__acpi_driver: acpi_driver struct
 541  *
 542  * Helper macro for ACPI drivers which do not do anything special in module
 543  * init/exit. This eliminates a lot of boilerplate. Each module may only
 544  * use this macro once, and calling it replaces module_init() and module_exit()
 545  */
 546 #define module_acpi_driver(__acpi_driver) \
 547         module_driver(__acpi_driver, acpi_bus_register_driver, \
 548                       acpi_bus_unregister_driver)
 549
 550 /*
 551  * Bind physical devices with ACPI devices
 552  */
 553 struct acpi_bus_type {
 554         struct list_head list;
 555         const char *name;
 556         bool (*match)(struct device *dev);
 557         struct acpi_device * (*find_companion)(struct device *);
 558         void (*setup)(struct device *);
 559         void (*cleanup)(struct device *);
 560 };
 561 int register_acpi_bus_type(struct acpi_bus_type *);
 562 int unregister_acpi_bus_type(struct acpi_bus_type *);
 563 int acpi_bind_one(struct device *dev, struct acpi_device *adev);
 564 int acpi_unbind_one(struct device *dev);
 565
 566 struct acpi_pci_root {
 567         struct acpi_device * device;
 568         struct pci_bus *bus;
 569         u16 segment;
 570         struct resource secondary;      /* downstream bus range */
 571
 572         u32 osc_support_set;    /* _OSC state of support bits */
 573         u32 osc_control_set;    /* _OSC state of control bits */
 574         phys_addr_t mcfg_addr;
 575 };
 576
 577 /* helper */
 578
 579 bool acpi_dma_supported(struct acpi_device *adev);
 580 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
 581 int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr);
 582 void acpi_dma_deconfigure(struct device *dev);
 583
 584 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
 585                                            u64 address, bool check_children);
 586 int acpi_is_root_bridge(acpi_handle);
 587 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
 588
 589 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
 590 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
 591
 592 #ifdef CONFIG_X86
 593 bool acpi_device_always_present(struct acpi_device *adev);
 594 #else
 595 static inline bool acpi_device_always_present(struct acpi_device *adev)
 596 {
 597         return false;
 598 }
 599 #endif
 600
 601 #ifdef CONFIG_PM
 602 void acpi_pm_wakeup_event(struct device *dev);
 603 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
 604                         void (*func)(struct acpi_device_wakeup_context *context));
 605 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
 606 bool acpi_pm_device_can_wakeup(struct device *dev);
 607 int acpi_pm_device_sleep_state(struct device *, int *, int);
 608 int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
 609 #else
 610 static inline void acpi_pm_wakeup_event(struct device *dev)
 611 {
 612 }
 613 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
 614                                                struct device *dev,
 615                                                void (*func)(struct acpi_device_wakeup_context *context))
 616 {
 617         return AE_SUPPORT;
 618 }
 619 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
 620 {
 621         return AE_SUPPORT;
 622 }
 623 static inline bool acpi_pm_device_can_wakeup(struct device *dev)
 624 {
 625         return false;
 626 }
 627 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
 628 {
 629         if (p)
 630                 *p = ACPI_STATE_D0;
 631
 632         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
 633                 m : ACPI_STATE_D0;
 634 }
 635 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
 636 {
 637         return -ENODEV;
 638 }
 639 #endif
 640
 641 #ifdef CONFIG_ACPI_SLEEP
 642 u32 acpi_target_system_state(void);
 643 #else
 644 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
 645 #endif
 646
 647 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
 648 {
 649         return adev->flags.power_manageable;
 650 }
 651
 652 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
 653 {
 654         return adev->wakeup.flags.valid;
 655 }
 656
 657 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
 658 {
 659         return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
 660                 ((acpi_gbl_FADT.header.revision < 6) &&
 661                 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
 662 }
 663
 664 #else   /* CONFIG_ACPI */
 665
 666 static inline int register_acpi_bus_type(void *bus) { return 0; }
 667 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 668
 669 #endif                          /* CONFIG_ACPI */
 670
 671 #endif /*__ACPI_BUS_H__*/