1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * acpi_bus.h - ACPI Bus Driver ($Revision: 22 $) 4 * 5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> 6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> 7 */ 8 9#ifndef __ACPI_BUS_H__ 10#define __ACPI_BUS_H__ 11 12#include <linux/device.h> 13#include <linux/property.h> 14 15/* TBD: Make dynamic */ 16#define ACPI_MAX_HANDLES 10 17struct acpi_handle_list { 18 u32 count; 19 acpi_handle handles[ACPI_MAX_HANDLES]; 20}; 21 22/* acpi_utils.h */ 23acpi_status 24acpi_extract_package(union acpi_object *package, 25 struct acpi_buffer *format, struct acpi_buffer *buffer); 26acpi_status 27acpi_evaluate_integer(acpi_handle handle, 28 acpi_string pathname, 29 struct acpi_object_list *arguments, unsigned long long *data); 30acpi_status 31acpi_evaluate_reference(acpi_handle handle, 32 acpi_string pathname, 33 struct acpi_object_list *arguments, 34 struct acpi_handle_list *list); 35acpi_status 36acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code, 37 struct acpi_buffer *status_buf); 38 39acpi_status 40acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld); 41 42bool acpi_has_method(acpi_handle handle, char *name); 43acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, 44 u64 arg); 45acpi_status acpi_evaluate_ej0(acpi_handle handle); 46acpi_status acpi_evaluate_lck(acpi_handle handle, int lock); 47acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function); 48bool acpi_ata_match(acpi_handle handle); 49bool acpi_bay_match(acpi_handle handle); 50bool acpi_dock_match(acpi_handle handle); 51 52bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs); 53union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid, 54 u64 rev, u64 func, union acpi_object *argv4); 55 56static inline union acpi_object * 57acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev, 58 u64 func, union acpi_object *argv4, 59 acpi_object_type type) 60{ 61 union acpi_object *obj; 62 63 obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4); 64 if (obj && obj->type != type) { 65 ACPI_FREE(obj); 66 obj = NULL; 67 } 68 69 return obj; 70} 71 72#define ACPI_INIT_DSM_ARGV4(cnt, eles) \ 73 { \ 74 .package.type = ACPI_TYPE_PACKAGE, \ 75 .package.count = (cnt), \ 76 .package.elements = (eles) \ 77 } 78 79bool acpi_dev_found(const char *hid); 80bool acpi_dev_present(const char *hid, const char *uid, s64 hrv); 81 82#ifdef CONFIG_ACPI 83 84struct proc_dir_entry; 85 86#define ACPI_BUS_FILE_ROOT "acpi" 87extern struct proc_dir_entry *acpi_root_dir; 88 89enum acpi_bus_device_type { 90 ACPI_BUS_TYPE_DEVICE = 0, 91 ACPI_BUS_TYPE_POWER, 92 ACPI_BUS_TYPE_PROCESSOR, 93 ACPI_BUS_TYPE_THERMAL, 94 ACPI_BUS_TYPE_POWER_BUTTON, 95 ACPI_BUS_TYPE_SLEEP_BUTTON, 96 ACPI_BUS_TYPE_ECDT_EC, 97 ACPI_BUS_DEVICE_TYPE_COUNT 98}; 99 100struct acpi_driver; 101struct acpi_device; 102 103/* 104 * ACPI Scan Handler 105 * ----------------- 106 */ 107 108struct acpi_hotplug_profile { 109 struct kobject kobj; 110 int (*scan_dependent)(struct acpi_device *adev); 111 void (*notify_online)(struct acpi_device *adev); 112 bool enabled:1; 113 bool demand_offline:1; 114}; 115 116static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile( 117 struct kobject *kobj) 118{ 119 return container_of(kobj, struct acpi_hotplug_profile, kobj); 120} 121 122struct acpi_scan_handler { 123 const struct acpi_device_id *ids; 124 struct list_head list_node; 125 bool (*match)(const char *idstr, const struct acpi_device_id **matchid); 126 int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id); 127 void (*detach)(struct acpi_device *dev); 128 void (*bind)(struct device *phys_dev); 129 void (*unbind)(struct device *phys_dev); 130 struct acpi_hotplug_profile hotplug; 131}; 132 133/* 134 * ACPI Hotplug Context 135 * -------------------- 136 */ 137 138struct acpi_hotplug_context { 139 struct acpi_device *self; 140 int (*notify)(struct acpi_device *, u32); 141 void (*uevent)(struct acpi_device *, u32); 142 void (*fixup)(struct acpi_device *); 143}; 144 145/* 146 * ACPI Driver 147 * ----------- 148 */ 149 150typedef int (*acpi_op_add) (struct acpi_device * device); 151typedef int (*acpi_op_remove) (struct acpi_device * device); 152typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event); 153 154struct acpi_device_ops { 155 acpi_op_add add; 156 acpi_op_remove remove; 157 acpi_op_notify notify; 158}; 159 160#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */ 161 162struct acpi_driver { 163 char name[80]; 164 char class[80]; 165 const struct acpi_device_id *ids; /* Supported Hardware IDs */ 166 unsigned int flags; 167 struct acpi_device_ops ops; 168 struct device_driver drv; 169 struct module *owner; 170}; 171 172/* 173 * ACPI Device 174 * ----------- 175 */ 176 177/* Status (_STA) */ 178 179struct acpi_device_status { 180 u32 present:1; 181 u32 enabled:1; 182 u32 show_in_ui:1; 183 u32 functional:1; 184 u32 battery_present:1; 185 u32 reserved:27; 186}; 187 188/* Flags */ 189 190struct acpi_device_flags { 191 u32 dynamic_status:1; 192 u32 removable:1; 193 u32 ejectable:1; 194 u32 power_manageable:1; 195 u32 match_driver:1; 196 u32 initialized:1; 197 u32 visited:1; 198 u32 hotplug_notify:1; 199 u32 is_dock_station:1; 200 u32 of_compatible_ok:1; 201 u32 coherent_dma:1; 202 u32 cca_seen:1; 203 u32 enumeration_by_parent:1; 204 u32 reserved:19; 205}; 206 207/* File System */ 208 209struct acpi_device_dir { 210 struct proc_dir_entry *entry; 211}; 212 213#define acpi_device_dir(d) ((d)->dir.entry) 214 215/* Plug and Play */ 216 217typedef char acpi_bus_id[8]; 218typedef u64 acpi_bus_address; 219typedef char acpi_device_name[40]; 220typedef char acpi_device_class[20]; 221 222struct acpi_hardware_id { 223 struct list_head list; 224 const char *id; 225}; 226 227struct acpi_pnp_type { 228 u32 hardware_id:1; 229 u32 bus_address:1; 230 u32 platform_id:1; 231 u32 reserved:29; 232}; 233 234struct acpi_device_pnp { 235 acpi_bus_id bus_id; /* Object name */ 236 int instance_no; /* Instance number of this object */ 237 struct acpi_pnp_type type; /* ID type */ 238 acpi_bus_address bus_address; /* _ADR */ 239 char *unique_id; /* _UID */ 240 struct list_head ids; /* _HID and _CIDs */ 241 acpi_device_name device_name; /* Driver-determined */ 242 acpi_device_class device_class; /* " */ 243 union acpi_object *str_obj; /* unicode string for _STR method */ 244}; 245 246#define acpi_device_bid(d) ((d)->pnp.bus_id) 247#define acpi_device_adr(d) ((d)->pnp.bus_address) 248const char *acpi_device_hid(struct acpi_device *device); 249#define acpi_device_uid(d) ((d)->pnp.unique_id) 250#define acpi_device_name(d) ((d)->pnp.device_name) 251#define acpi_device_class(d) ((d)->pnp.device_class) 252 253/* Power Management */ 254 255struct acpi_device_power_flags { 256 u32 explicit_get:1; /* _PSC present? */ 257 u32 power_resources:1; /* Power resources */ 258 u32 inrush_current:1; /* Serialize Dx->D0 */ 259 u32 power_removed:1; /* Optimize Dx->D0 */ 260 u32 ignore_parent:1; /* Power is independent of parent power state */ 261 u32 dsw_present:1; /* _DSW present? */ 262 u32 reserved:26; 263}; 264 265struct acpi_device_power_state { 266 struct { 267 u8 valid:1; 268 u8 explicit_set:1; /* _PSx present? */ 269 u8 reserved:6; 270 } flags; 271 int power; /* % Power (compared to D0) */ 272 int latency; /* Dx->D0 time (microseconds) */ 273 struct list_head resources; /* Power resources referenced */ 274}; 275 276struct acpi_device_power { 277 int state; /* Current state */ 278 struct acpi_device_power_flags flags; 279 struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */ 280}; 281 282/* Performance Management */ 283 284struct acpi_device_perf_flags { 285 u8 reserved:8; 286}; 287 288struct acpi_device_perf_state { 289 struct { 290 u8 valid:1; 291 u8 reserved:7; 292 } flags; 293 u8 power; /* % Power (compared to P0) */ 294 u8 performance; /* % Performance ( " ) */ 295 int latency; /* Px->P0 time (microseconds) */ 296}; 297 298struct acpi_device_perf { 299 int state; 300 struct acpi_device_perf_flags flags; 301 int state_count; 302 struct acpi_device_perf_state *states; 303}; 304 305/* Wakeup Management */ 306struct acpi_device_wakeup_flags { 307 u8 valid:1; /* Can successfully enable wakeup? */ 308 u8 notifier_present:1; /* Wake-up notify handler has been installed */ 309}; 310 311struct acpi_device_wakeup_context { 312 void (*func)(struct acpi_device_wakeup_context *context); 313 struct device *dev; 314}; 315 316struct acpi_device_wakeup { 317 acpi_handle gpe_device; 318 u64 gpe_number; 319 u64 sleep_state; 320 struct list_head resources; 321 struct acpi_device_wakeup_flags flags; 322 struct acpi_device_wakeup_context context; 323 struct wakeup_source *ws; 324 int prepare_count; 325 int enable_count; 326}; 327 328struct acpi_device_physical_node { 329 unsigned int node_id; 330 struct list_head node; 331 struct device *dev; 332 bool put_online:1; 333}; 334 335struct acpi_device_properties { 336 const guid_t *guid; 337 const union acpi_object *properties; 338 struct list_head list; 339}; 340 341/* ACPI Device Specific Data (_DSD) */ 342struct acpi_device_data { 343 const union acpi_object *pointer; 344 struct list_head properties; 345 const union acpi_object *of_compatible; 346 struct list_head subnodes; 347}; 348 349struct acpi_gpio_mapping; 350 351/* Device */ 352struct acpi_device { 353 int device_type; 354 acpi_handle handle; /* no handle for fixed hardware */ 355 struct fwnode_handle fwnode; 356 struct acpi_device *parent; 357 struct list_head children; 358 struct list_head node; 359 struct list_head wakeup_list; 360 struct list_head del_list; 361 struct acpi_device_status status; 362 struct acpi_device_flags flags; 363 struct acpi_device_pnp pnp; 364 struct acpi_device_power power; 365 struct acpi_device_wakeup wakeup; 366 struct acpi_device_perf performance; 367 struct acpi_device_dir dir; 368 struct acpi_device_data data; 369 struct acpi_scan_handler *handler; 370 struct acpi_hotplug_context *hp; 371 struct acpi_driver *driver; 372 const struct acpi_gpio_mapping *driver_gpios; 373 void *driver_data; 374 struct device dev; 375 unsigned int physical_node_count; 376 unsigned int dep_unmet; 377 struct list_head physical_node_list; 378 struct mutex physical_node_lock; 379 void (*remove)(struct acpi_device *); 380}; 381 382/* Non-device subnode */ 383struct acpi_data_node { 384 const char *name; 385 acpi_handle handle; 386 struct fwnode_handle fwnode; 387 struct fwnode_handle *parent; 388 struct acpi_device_data data; 389 struct list_head sibling; 390 struct kobject kobj; 391 struct completion kobj_done; 392}; 393 394extern const struct fwnode_operations acpi_device_fwnode_ops; 395extern const struct fwnode_operations acpi_data_fwnode_ops; 396extern const struct fwnode_operations acpi_static_fwnode_ops; 397 398bool is_acpi_device_node(const struct fwnode_handle *fwnode); 399bool is_acpi_data_node(const struct fwnode_handle *fwnode); 400 401static inline bool is_acpi_node(const struct fwnode_handle *fwnode) 402{ 403 return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode)); 404} 405 406#define to_acpi_device_node(__fwnode) \ 407 ({ \ 408 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \ 409 \ 410 is_acpi_device_node(__to_acpi_device_node_fwnode) ? \ 411 container_of(__to_acpi_device_node_fwnode, \ 412 struct acpi_device, fwnode) : \ 413 NULL; \ 414 }) 415 416#define to_acpi_data_node(__fwnode) \ 417 ({ \ 418 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \ 419 \ 420 is_acpi_data_node(__to_acpi_data_node_fwnode) ? \ 421 container_of(__to_acpi_data_node_fwnode, \ 422 struct acpi_data_node, fwnode) : \ 423 NULL; \ 424 }) 425 426static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode) 427{ 428 return !IS_ERR_OR_NULL(fwnode) && 429 fwnode->ops == &acpi_static_fwnode_ops; 430} 431 432static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode, 433 const char *name) 434{ 435 return is_acpi_data_node(fwnode) ? 436 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false; 437} 438 439static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) 440{ 441 return &adev->fwnode; 442} 443 444static inline void *acpi_driver_data(struct acpi_device *d) 445{ 446 return d->driver_data; 447} 448 449#define to_acpi_device(d) container_of(d, struct acpi_device, dev) 450#define to_acpi_driver(d) container_of(d, struct acpi_driver, drv) 451 452static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta) 453{ 454 *((u32 *)&adev->status) = sta; 455} 456 457static inline void acpi_set_hp_context(struct acpi_device *adev, 458 struct acpi_hotplug_context *hp) 459{ 460 hp->self = adev; 461 adev->hp = hp; 462} 463 464void acpi_initialize_hp_context(struct acpi_device *adev, 465 struct acpi_hotplug_context *hp, 466 int (*notify)(struct acpi_device *, u32), 467 void (*uevent)(struct acpi_device *, u32)); 468 469/* acpi_device.dev.bus == &acpi_bus_type */ 470extern struct bus_type acpi_bus_type; 471 472/* 473 * Events 474 * ------ 475 */ 476 477struct acpi_bus_event { 478 struct list_head node; 479 acpi_device_class device_class; 480 acpi_bus_id bus_id; 481 u32 type; 482 u32 data; 483}; 484 485extern struct kobject *acpi_kobj; 486extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); 487void acpi_bus_private_data_handler(acpi_handle, void *); 488int acpi_bus_get_private_data(acpi_handle, void **); 489int acpi_bus_attach_private_data(acpi_handle, void *); 490void acpi_bus_detach_private_data(acpi_handle); 491extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); 492extern int register_acpi_notifier(struct notifier_block *); 493extern int unregister_acpi_notifier(struct notifier_block *); 494 495/* 496 * External Functions 497 */ 498 499int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device); 500struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle); 501void acpi_bus_put_acpi_device(struct acpi_device *adev); 502acpi_status acpi_bus_get_status_handle(acpi_handle handle, 503 unsigned long long *sta); 504int acpi_bus_get_status(struct acpi_device *device); 505 506int acpi_bus_set_power(acpi_handle handle, int state); 507const char *acpi_power_state_string(int state); 508int acpi_device_set_power(struct acpi_device *device, int state); 509int acpi_bus_init_power(struct acpi_device *device); 510int acpi_device_fix_up_power(struct acpi_device *device); 511int acpi_bus_update_power(acpi_handle handle, int *state_p); 512int acpi_device_update_power(struct acpi_device *device, int *state_p); 513bool acpi_bus_power_manageable(acpi_handle handle); 514int acpi_device_power_add_dependent(struct acpi_device *adev, 515 struct device *dev); 516void acpi_device_power_remove_dependent(struct acpi_device *adev, 517 struct device *dev); 518 519#ifdef CONFIG_PM 520bool acpi_bus_can_wakeup(acpi_handle handle); 521#else 522static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; } 523#endif 524 525void acpi_scan_lock_acquire(void); 526void acpi_scan_lock_release(void); 527void acpi_lock_hp_context(void); 528void acpi_unlock_hp_context(void); 529int acpi_scan_add_handler(struct acpi_scan_handler *handler); 530int acpi_bus_register_driver(struct acpi_driver *driver); 531void acpi_bus_unregister_driver(struct acpi_driver *driver); 532int acpi_bus_scan(acpi_handle handle); 533void acpi_bus_trim(struct acpi_device *start); 534acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd); 535int acpi_match_device_ids(struct acpi_device *device, 536 const struct acpi_device_id *ids); 537void acpi_set_modalias(struct acpi_device *adev, const char *default_id, 538 char *modalias, size_t len); 539int acpi_create_dir(struct acpi_device *); 540void acpi_remove_dir(struct acpi_device *); 541 542static inline bool acpi_device_enumerated(struct acpi_device *adev) 543{ 544 return adev && adev->flags.initialized && adev->flags.visited; 545} 546 547/** 548 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver 549 * @__acpi_driver: acpi_driver struct 550 * 551 * Helper macro for ACPI drivers which do not do anything special in module 552 * init/exit. This eliminates a lot of boilerplate. Each module may only 553 * use this macro once, and calling it replaces module_init() and module_exit() 554 */ 555#define module_acpi_driver(__acpi_driver) \ 556 module_driver(__acpi_driver, acpi_bus_register_driver, \ 557 acpi_bus_unregister_driver) 558 559/* 560 * Bind physical devices with ACPI devices 561 */ 562struct acpi_bus_type { 563 struct list_head list; 564 const char *name; 565 bool (*match)(struct device *dev); 566 struct acpi_device * (*find_companion)(struct device *); 567 void (*setup)(struct device *); 568 void (*cleanup)(struct device *); 569}; 570int register_acpi_bus_type(struct acpi_bus_type *); 571int unregister_acpi_bus_type(struct acpi_bus_type *); 572int acpi_bind_one(struct device *dev, struct acpi_device *adev); 573int acpi_unbind_one(struct device *dev); 574 575struct acpi_pci_root { 576 struct acpi_device * device; 577 struct pci_bus *bus; 578 u16 segment; 579 struct resource secondary; /* downstream bus range */ 580 581 u32 osc_support_set; /* _OSC state of support bits */ 582 u32 osc_control_set; /* _OSC state of control bits */ 583 phys_addr_t mcfg_addr; 584}; 585 586/* helper */ 587 588bool acpi_dma_supported(struct acpi_device *adev); 589enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); 590int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map); 591int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, 592 const u32 *input_id); 593static inline int acpi_dma_configure(struct device *dev, 594 enum dev_dma_attr attr) 595{ 596 return acpi_dma_configure_id(dev, attr, NULL); 597} 598struct acpi_device *acpi_find_child_device(struct acpi_device *parent, 599 u64 address, bool check_children); 600int acpi_is_root_bridge(acpi_handle); 601struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle); 602 603int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state); 604int acpi_disable_wakeup_device_power(struct acpi_device *dev); 605 606#ifdef CONFIG_X86 607bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status); 608#else 609static inline bool acpi_device_override_status(struct acpi_device *adev, 610 unsigned long long *status) 611{ 612 return false; 613} 614#endif 615 616#ifdef CONFIG_PM 617void acpi_pm_wakeup_event(struct device *dev); 618acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev, 619 void (*func)(struct acpi_device_wakeup_context *context)); 620acpi_status acpi_remove_pm_notifier(struct acpi_device *adev); 621bool acpi_pm_device_can_wakeup(struct device *dev); 622int acpi_pm_device_sleep_state(struct device *, int *, int); 623int acpi_pm_set_device_wakeup(struct device *dev, bool enable); 624#else 625static inline void acpi_pm_wakeup_event(struct device *dev) 626{ 627} 628static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, 629 struct device *dev, 630 void (*func)(struct acpi_device_wakeup_context *context)) 631{ 632 return AE_SUPPORT; 633} 634static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev) 635{ 636 return AE_SUPPORT; 637} 638static inline bool acpi_pm_device_can_wakeup(struct device *dev) 639{ 640 return false; 641} 642static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) 643{ 644 if (p) 645 *p = ACPI_STATE_D0; 646 647 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ? 648 m : ACPI_STATE_D0; 649} 650static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable) 651{ 652 return -ENODEV; 653} 654#endif 655 656#ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT 657bool acpi_sleep_state_supported(u8 sleep_state); 658#else 659static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; } 660#endif 661 662#ifdef CONFIG_ACPI_SLEEP 663u32 acpi_target_system_state(void); 664#else 665static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; } 666#endif 667 668static inline bool acpi_device_power_manageable(struct acpi_device *adev) 669{ 670 return adev->flags.power_manageable; 671} 672 673static inline bool acpi_device_can_wakeup(struct acpi_device *adev) 674{ 675 return adev->wakeup.flags.valid; 676} 677 678static inline bool acpi_device_can_poweroff(struct acpi_device *adev) 679{ 680 return adev->power.states[ACPI_STATE_D3_COLD].flags.valid || 681 ((acpi_gbl_FADT.header.revision < 6) && 682 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); 683} 684 685bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2); 686 687struct acpi_device * 688acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv); 689 690static inline void acpi_dev_put(struct acpi_device *adev) 691{ 692 if (adev) 693 put_device(&adev->dev); 694} 695#else /* CONFIG_ACPI */ 696 697static inline int register_acpi_bus_type(void *bus) { return 0; } 698static inline int unregister_acpi_bus_type(void *bus) { return 0; } 699 700#endif /* CONFIG_ACPI */ 701 702#endif /*__ACPI_BUS_H__*/ 703