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