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 }; 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 int enable_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 extern const struct fwnode_operations acpi_device_fwnode_ops; 399 extern const struct fwnode_operations acpi_data_fwnode_ops; 400 extern const struct fwnode_operations acpi_static_fwnode_ops; 401 402 static inline bool is_acpi_node(const struct fwnode_handle *fwnode) 403 { 404 return !IS_ERR_OR_NULL(fwnode) && 405 (fwnode->ops == &acpi_device_fwnode_ops 406 || fwnode->ops == &acpi_data_fwnode_ops); 407 } 408 409 static inline bool is_acpi_device_node(const struct fwnode_handle *fwnode) 410 { 411 return !IS_ERR_OR_NULL(fwnode) && 412 fwnode->ops == &acpi_device_fwnode_ops; 413 } 414 415 #define to_acpi_device_node(__fwnode) \ 416 ({ \ 417 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \ 418 \ 419 is_acpi_device_node(__to_acpi_device_node_fwnode) ? \ 420 container_of(__to_acpi_device_node_fwnode, \ 421 struct acpi_device, fwnode) : \ 422 NULL; \ 423 }) 424 425 static inline bool is_acpi_data_node(const struct fwnode_handle *fwnode) 426 { 427 return !IS_ERR_OR_NULL(fwnode) && fwnode->ops == &acpi_data_fwnode_ops; 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 void acpi_dma_deconfigure(struct device *dev); 605 606 struct acpi_device *acpi_find_child_device(struct acpi_device *parent, 607 u64 address, bool check_children); 608 int acpi_is_root_bridge(acpi_handle); 609 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle); 610 611 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state); 612 int acpi_disable_wakeup_device_power(struct acpi_device *dev); 613 614 #ifdef CONFIG_X86 615 bool acpi_device_always_present(struct acpi_device *adev); 616 #else 617 static inline bool acpi_device_always_present(struct acpi_device *adev) 618 { 619 return false; 620 } 621 #endif 622 623 #ifdef CONFIG_PM 624 void acpi_pm_wakeup_event(struct device *dev); 625 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev, 626 void (*func)(struct acpi_device_wakeup_context *context)); 627 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev); 628 bool acpi_pm_device_can_wakeup(struct device *dev); 629 int acpi_pm_device_sleep_state(struct device *, int *, int); 630 int acpi_pm_set_device_wakeup(struct device *dev, bool enable); 631 int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable); 632 #else 633 static inline void acpi_pm_wakeup_event(struct device *dev) 634 { 635 } 636 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, 637 struct device *dev, 638 void (*func)(struct acpi_device_wakeup_context *context)) 639 { 640 return AE_SUPPORT; 641 } 642 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev) 643 { 644 return AE_SUPPORT; 645 } 646 static inline bool acpi_pm_device_can_wakeup(struct device *dev) 647 { 648 return false; 649 } 650 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) 651 { 652 if (p) 653 *p = ACPI_STATE_D0; 654 655 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ? 656 m : ACPI_STATE_D0; 657 } 658 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable) 659 { 660 return -ENODEV; 661 } 662 static inline int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable) 663 { 664 return -ENODEV; 665 } 666 #endif 667 668 #ifdef CONFIG_ACPI_SLEEP 669 u32 acpi_target_system_state(void); 670 #else 671 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; } 672 #endif 673 674 static inline bool acpi_device_power_manageable(struct acpi_device *adev) 675 { 676 return adev->flags.power_manageable; 677 } 678 679 static inline bool acpi_device_can_wakeup(struct acpi_device *adev) 680 { 681 return adev->wakeup.flags.valid; 682 } 683 684 static inline bool acpi_device_can_poweroff(struct acpi_device *adev) 685 { 686 return adev->power.states[ACPI_STATE_D3_COLD].flags.valid || 687 ((acpi_gbl_FADT.header.revision < 6) && 688 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); 689 } 690 691 #else /* CONFIG_ACPI */ 692 693 static inline int register_acpi_bus_type(void *bus) { return 0; } 694 static inline int unregister_acpi_bus_type(void *bus) { return 0; } 695 696 #endif /* CONFIG_ACPI */ 697 698 #endif /*__ACPI_BUS_H__*/ 699