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 17 struct acpi_handle_list { 18 u32 count; 19 acpi_handle handles[ACPI_MAX_HANDLES]; 20 }; 21 22 /* acpi_utils.h */ 23 acpi_status 24 acpi_extract_package(union acpi_object *package, 25 struct acpi_buffer *format, struct acpi_buffer *buffer); 26 acpi_status 27 acpi_evaluate_integer(acpi_handle handle, 28 acpi_string pathname, 29 struct acpi_object_list *arguments, unsigned long long *data); 30 acpi_status 31 acpi_evaluate_reference(acpi_handle handle, 32 acpi_string pathname, 33 struct acpi_object_list *arguments, 34 struct acpi_handle_list *list); 35 acpi_status 36 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code, 37 struct acpi_buffer *status_buf); 38 39 acpi_status 40 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld); 41 42 bool acpi_has_method(acpi_handle handle, char *name); 43 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, 44 u64 arg); 45 acpi_status acpi_evaluate_ej0(acpi_handle handle); 46 acpi_status acpi_evaluate_lck(acpi_handle handle, int lock); 47 acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function); 48 bool acpi_ata_match(acpi_handle handle); 49 bool acpi_bay_match(acpi_handle handle); 50 bool acpi_dock_match(acpi_handle handle); 51 52 bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs); 53 union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid, 54 u64 rev, u64 func, union acpi_object *argv4); 55 56 static inline union acpi_object * 57 acpi_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 79 bool acpi_dev_found(const char *hid); 80 bool acpi_dev_present(const char *hid, const char *uid, s64 hrv); 81 bool acpi_reduced_hardware(void); 82 83 #ifdef CONFIG_ACPI 84 85 struct proc_dir_entry; 86 87 #define ACPI_BUS_FILE_ROOT "acpi" 88 extern struct proc_dir_entry *acpi_root_dir; 89 90 enum acpi_bus_device_type { 91 ACPI_BUS_TYPE_DEVICE = 0, 92 ACPI_BUS_TYPE_POWER, 93 ACPI_BUS_TYPE_PROCESSOR, 94 ACPI_BUS_TYPE_THERMAL, 95 ACPI_BUS_TYPE_POWER_BUTTON, 96 ACPI_BUS_TYPE_SLEEP_BUTTON, 97 ACPI_BUS_TYPE_ECDT_EC, 98 ACPI_BUS_DEVICE_TYPE_COUNT 99 }; 100 101 struct acpi_driver; 102 struct acpi_device; 103 104 /* 105 * ACPI Scan Handler 106 * ----------------- 107 */ 108 109 struct acpi_hotplug_profile { 110 struct kobject kobj; 111 int (*scan_dependent)(struct acpi_device *adev); 112 void (*notify_online)(struct acpi_device *adev); 113 bool enabled:1; 114 bool demand_offline:1; 115 }; 116 117 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile( 118 struct kobject *kobj) 119 { 120 return container_of(kobj, struct acpi_hotplug_profile, kobj); 121 } 122 123 struct acpi_scan_handler { 124 const struct acpi_device_id *ids; 125 struct list_head list_node; 126 bool (*match)(const char *idstr, const struct acpi_device_id **matchid); 127 int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id); 128 void (*detach)(struct acpi_device *dev); 129 void (*bind)(struct device *phys_dev); 130 void (*unbind)(struct device *phys_dev); 131 struct acpi_hotplug_profile hotplug; 132 }; 133 134 /* 135 * ACPI Hotplug Context 136 * -------------------- 137 */ 138 139 struct acpi_hotplug_context { 140 struct acpi_device *self; 141 int (*notify)(struct acpi_device *, u32); 142 void (*uevent)(struct acpi_device *, u32); 143 void (*fixup)(struct acpi_device *); 144 }; 145 146 /* 147 * ACPI Driver 148 * ----------- 149 */ 150 151 typedef int (*acpi_op_add) (struct acpi_device * device); 152 typedef int (*acpi_op_remove) (struct acpi_device * device); 153 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event); 154 155 struct acpi_device_ops { 156 acpi_op_add add; 157 acpi_op_remove remove; 158 acpi_op_notify notify; 159 }; 160 161 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */ 162 163 struct acpi_driver { 164 char name[80]; 165 char class[80]; 166 const struct acpi_device_id *ids; /* Supported Hardware IDs */ 167 unsigned int flags; 168 struct acpi_device_ops ops; 169 struct device_driver drv; 170 struct module *owner; 171 }; 172 173 /* 174 * ACPI Device 175 * ----------- 176 */ 177 178 /* Status (_STA) */ 179 180 struct acpi_device_status { 181 u32 present:1; 182 u32 enabled:1; 183 u32 show_in_ui:1; 184 u32 functional:1; 185 u32 battery_present:1; 186 u32 reserved:27; 187 }; 188 189 /* Flags */ 190 191 struct acpi_device_flags { 192 u32 dynamic_status:1; 193 u32 removable:1; 194 u32 ejectable:1; 195 u32 power_manageable:1; 196 u32 match_driver:1; 197 u32 initialized:1; 198 u32 visited:1; 199 u32 hotplug_notify:1; 200 u32 is_dock_station:1; 201 u32 of_compatible_ok:1; 202 u32 coherent_dma:1; 203 u32 cca_seen:1; 204 u32 enumeration_by_parent:1; 205 u32 reserved:19; 206 }; 207 208 /* File System */ 209 210 struct acpi_device_dir { 211 struct proc_dir_entry *entry; 212 }; 213 214 #define acpi_device_dir(d) ((d)->dir.entry) 215 216 /* Plug and Play */ 217 218 typedef char acpi_bus_id[8]; 219 typedef u64 acpi_bus_address; 220 typedef char acpi_device_name[40]; 221 typedef char acpi_device_class[20]; 222 223 struct acpi_hardware_id { 224 struct list_head list; 225 const char *id; 226 }; 227 228 struct acpi_pnp_type { 229 u32 hardware_id:1; 230 u32 bus_address:1; 231 u32 platform_id:1; 232 u32 reserved:29; 233 }; 234 235 struct acpi_device_pnp { 236 acpi_bus_id bus_id; /* Object name */ 237 int instance_no; /* Instance number of this object */ 238 struct acpi_pnp_type type; /* ID type */ 239 acpi_bus_address bus_address; /* _ADR */ 240 char *unique_id; /* _UID */ 241 struct list_head ids; /* _HID and _CIDs */ 242 acpi_device_name device_name; /* Driver-determined */ 243 acpi_device_class device_class; /* " */ 244 union acpi_object *str_obj; /* unicode string for _STR method */ 245 }; 246 247 #define acpi_device_bid(d) ((d)->pnp.bus_id) 248 #define acpi_device_adr(d) ((d)->pnp.bus_address) 249 const char *acpi_device_hid(struct acpi_device *device); 250 #define acpi_device_uid(d) ((d)->pnp.unique_id) 251 #define acpi_device_name(d) ((d)->pnp.device_name) 252 #define acpi_device_class(d) ((d)->pnp.device_class) 253 254 /* Power Management */ 255 256 struct acpi_device_power_flags { 257 u32 explicit_get:1; /* _PSC present? */ 258 u32 power_resources:1; /* Power resources */ 259 u32 inrush_current:1; /* Serialize Dx->D0 */ 260 u32 power_removed:1; /* Optimize Dx->D0 */ 261 u32 ignore_parent:1; /* Power is independent of parent power state */ 262 u32 dsw_present:1; /* _DSW present? */ 263 u32 reserved:26; 264 }; 265 266 struct acpi_device_power_state { 267 struct { 268 u8 valid:1; 269 u8 explicit_set:1; /* _PSx present? */ 270 u8 reserved:6; 271 } flags; 272 int power; /* % Power (compared to D0) */ 273 int latency; /* Dx->D0 time (microseconds) */ 274 struct list_head resources; /* Power resources referenced */ 275 }; 276 277 struct acpi_device_power { 278 int state; /* Current state */ 279 struct acpi_device_power_flags flags; 280 struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */ 281 }; 282 283 /* Performance Management */ 284 285 struct acpi_device_perf_flags { 286 u8 reserved:8; 287 }; 288 289 struct acpi_device_perf_state { 290 struct { 291 u8 valid:1; 292 u8 reserved:7; 293 } flags; 294 u8 power; /* % Power (compared to P0) */ 295 u8 performance; /* % Performance ( " ) */ 296 int latency; /* Px->P0 time (microseconds) */ 297 }; 298 299 struct acpi_device_perf { 300 int state; 301 struct acpi_device_perf_flags flags; 302 int state_count; 303 struct acpi_device_perf_state *states; 304 }; 305 306 /* Wakeup Management */ 307 struct acpi_device_wakeup_flags { 308 u8 valid:1; /* Can successfully enable wakeup? */ 309 u8 notifier_present:1; /* Wake-up notify handler has been installed */ 310 }; 311 312 struct acpi_device_wakeup_context { 313 void (*func)(struct acpi_device_wakeup_context *context); 314 struct device *dev; 315 }; 316 317 struct acpi_device_wakeup { 318 acpi_handle gpe_device; 319 u64 gpe_number; 320 u64 sleep_state; 321 struct list_head resources; 322 struct acpi_device_wakeup_flags flags; 323 struct acpi_device_wakeup_context context; 324 struct wakeup_source *ws; 325 int prepare_count; 326 int enable_count; 327 }; 328 329 struct acpi_device_physical_node { 330 unsigned int node_id; 331 struct list_head node; 332 struct device *dev; 333 bool put_online:1; 334 }; 335 336 struct acpi_device_properties { 337 const guid_t *guid; 338 const union acpi_object *properties; 339 struct list_head list; 340 }; 341 342 /* ACPI Device Specific Data (_DSD) */ 343 struct acpi_device_data { 344 const union acpi_object *pointer; 345 struct list_head properties; 346 const union acpi_object *of_compatible; 347 struct list_head subnodes; 348 }; 349 350 struct acpi_gpio_mapping; 351 352 /* Device */ 353 struct acpi_device { 354 int device_type; 355 acpi_handle handle; /* no handle for fixed hardware */ 356 struct fwnode_handle fwnode; 357 struct acpi_device *parent; 358 struct list_head children; 359 struct list_head node; 360 struct list_head wakeup_list; 361 struct list_head del_list; 362 struct acpi_device_status status; 363 struct acpi_device_flags flags; 364 struct acpi_device_pnp pnp; 365 struct acpi_device_power power; 366 struct acpi_device_wakeup wakeup; 367 struct acpi_device_perf performance; 368 struct acpi_device_dir dir; 369 struct acpi_device_data data; 370 struct acpi_scan_handler *handler; 371 struct acpi_hotplug_context *hp; 372 struct acpi_driver *driver; 373 const struct acpi_gpio_mapping *driver_gpios; 374 void *driver_data; 375 struct device dev; 376 unsigned int physical_node_count; 377 unsigned int dep_unmet; 378 struct list_head physical_node_list; 379 struct mutex physical_node_lock; 380 void (*remove)(struct acpi_device *); 381 }; 382 383 /* Non-device subnode */ 384 struct acpi_data_node { 385 const char *name; 386 acpi_handle handle; 387 struct fwnode_handle fwnode; 388 struct fwnode_handle *parent; 389 struct acpi_device_data data; 390 struct list_head sibling; 391 struct kobject kobj; 392 struct completion kobj_done; 393 }; 394 395 extern const struct fwnode_operations acpi_device_fwnode_ops; 396 extern const struct fwnode_operations acpi_data_fwnode_ops; 397 extern const struct fwnode_operations acpi_static_fwnode_ops; 398 399 bool is_acpi_device_node(const struct fwnode_handle *fwnode); 400 bool is_acpi_data_node(const struct fwnode_handle *fwnode); 401 402 static inline bool is_acpi_node(const struct fwnode_handle *fwnode) 403 { 404 return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode)); 405 } 406 407 #define to_acpi_device_node(__fwnode) \ 408 ({ \ 409 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \ 410 \ 411 is_acpi_device_node(__to_acpi_device_node_fwnode) ? \ 412 container_of(__to_acpi_device_node_fwnode, \ 413 struct acpi_device, fwnode) : \ 414 NULL; \ 415 }) 416 417 #define to_acpi_data_node(__fwnode) \ 418 ({ \ 419 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \ 420 \ 421 is_acpi_data_node(__to_acpi_data_node_fwnode) ? \ 422 container_of(__to_acpi_data_node_fwnode, \ 423 struct acpi_data_node, fwnode) : \ 424 NULL; \ 425 }) 426 427 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode) 428 { 429 return !IS_ERR_OR_NULL(fwnode) && 430 fwnode->ops == &acpi_static_fwnode_ops; 431 } 432 433 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode, 434 const char *name) 435 { 436 return is_acpi_data_node(fwnode) ? 437 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false; 438 } 439 440 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) 441 { 442 return &adev->fwnode; 443 } 444 445 static inline void *acpi_driver_data(struct acpi_device *d) 446 { 447 return d->driver_data; 448 } 449 450 #define to_acpi_device(d) container_of(d, struct acpi_device, dev) 451 #define to_acpi_driver(d) container_of(d, struct acpi_driver, drv) 452 453 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta) 454 { 455 *((u32 *)&adev->status) = sta; 456 } 457 458 static inline void acpi_set_hp_context(struct acpi_device *adev, 459 struct acpi_hotplug_context *hp) 460 { 461 hp->self = adev; 462 adev->hp = hp; 463 } 464 465 void acpi_initialize_hp_context(struct acpi_device *adev, 466 struct acpi_hotplug_context *hp, 467 int (*notify)(struct acpi_device *, u32), 468 void (*uevent)(struct acpi_device *, u32)); 469 470 /* acpi_device.dev.bus == &acpi_bus_type */ 471 extern struct bus_type acpi_bus_type; 472 473 /* 474 * Events 475 * ------ 476 */ 477 478 struct acpi_bus_event { 479 struct list_head node; 480 acpi_device_class device_class; 481 acpi_bus_id bus_id; 482 u32 type; 483 u32 data; 484 }; 485 486 extern struct kobject *acpi_kobj; 487 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); 488 void acpi_bus_private_data_handler(acpi_handle, void *); 489 int acpi_bus_get_private_data(acpi_handle, void **); 490 int acpi_bus_attach_private_data(acpi_handle, void *); 491 void acpi_bus_detach_private_data(acpi_handle); 492 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); 493 extern int register_acpi_notifier(struct notifier_block *); 494 extern int unregister_acpi_notifier(struct notifier_block *); 495 496 /* 497 * External Functions 498 */ 499 500 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device); 501 struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle); 502 void acpi_bus_put_acpi_device(struct acpi_device *adev); 503 acpi_status acpi_bus_get_status_handle(acpi_handle handle, 504 unsigned long long *sta); 505 int acpi_bus_get_status(struct acpi_device *device); 506 507 int acpi_bus_set_power(acpi_handle handle, int state); 508 const char *acpi_power_state_string(int state); 509 int acpi_device_set_power(struct acpi_device *device, int state); 510 int acpi_bus_init_power(struct acpi_device *device); 511 int acpi_device_fix_up_power(struct acpi_device *device); 512 int acpi_bus_update_power(acpi_handle handle, int *state_p); 513 int acpi_device_update_power(struct acpi_device *device, int *state_p); 514 bool acpi_bus_power_manageable(acpi_handle handle); 515 int acpi_device_power_add_dependent(struct acpi_device *adev, 516 struct device *dev); 517 void acpi_device_power_remove_dependent(struct acpi_device *adev, 518 struct device *dev); 519 520 #ifdef CONFIG_PM 521 bool acpi_bus_can_wakeup(acpi_handle handle); 522 #else 523 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; } 524 #endif 525 526 void acpi_scan_lock_acquire(void); 527 void acpi_scan_lock_release(void); 528 void acpi_lock_hp_context(void); 529 void acpi_unlock_hp_context(void); 530 int acpi_scan_add_handler(struct acpi_scan_handler *handler); 531 int acpi_bus_register_driver(struct acpi_driver *driver); 532 void acpi_bus_unregister_driver(struct acpi_driver *driver); 533 int acpi_bus_scan(acpi_handle handle); 534 void acpi_bus_trim(struct acpi_device *start); 535 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd); 536 int acpi_match_device_ids(struct acpi_device *device, 537 const struct acpi_device_id *ids); 538 void acpi_set_modalias(struct acpi_device *adev, const char *default_id, 539 char *modalias, size_t len); 540 int acpi_create_dir(struct acpi_device *); 541 void acpi_remove_dir(struct acpi_device *); 542 543 static inline bool acpi_device_enumerated(struct acpi_device *adev) 544 { 545 return adev && adev->flags.initialized && adev->flags.visited; 546 } 547 548 /** 549 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver 550 * @__acpi_driver: acpi_driver struct 551 * 552 * Helper macro for ACPI drivers which do not do anything special in module 553 * init/exit. This eliminates a lot of boilerplate. Each module may only 554 * use this macro once, and calling it replaces module_init() and module_exit() 555 */ 556 #define module_acpi_driver(__acpi_driver) \ 557 module_driver(__acpi_driver, acpi_bus_register_driver, \ 558 acpi_bus_unregister_driver) 559 560 /* 561 * Bind physical devices with ACPI devices 562 */ 563 struct acpi_bus_type { 564 struct list_head list; 565 const char *name; 566 bool (*match)(struct device *dev); 567 struct acpi_device * (*find_companion)(struct device *); 568 void (*setup)(struct device *); 569 void (*cleanup)(struct device *); 570 }; 571 int register_acpi_bus_type(struct acpi_bus_type *); 572 int unregister_acpi_bus_type(struct acpi_bus_type *); 573 int acpi_bind_one(struct device *dev, struct acpi_device *adev); 574 int acpi_unbind_one(struct device *dev); 575 576 struct acpi_pci_root { 577 struct acpi_device * device; 578 struct pci_bus *bus; 579 u16 segment; 580 struct resource secondary; /* downstream bus range */ 581 582 u32 osc_support_set; /* _OSC state of support bits */ 583 u32 osc_control_set; /* _OSC state of control bits */ 584 phys_addr_t mcfg_addr; 585 }; 586 587 /* helper */ 588 589 bool acpi_dma_supported(struct acpi_device *adev); 590 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); 591 int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, 592 u64 *size); 593 int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, 594 const u32 *input_id); 595 static inline int acpi_dma_configure(struct device *dev, 596 enum dev_dma_attr attr) 597 { 598 return acpi_dma_configure_id(dev, attr, NULL); 599 } 600 struct acpi_device *acpi_find_child_device(struct acpi_device *parent, 601 u64 address, bool check_children); 602 int acpi_is_root_bridge(acpi_handle); 603 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle); 604 605 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state); 606 int acpi_disable_wakeup_device_power(struct acpi_device *dev); 607 608 #ifdef CONFIG_X86 609 bool acpi_device_always_present(struct acpi_device *adev); 610 #else 611 static inline bool acpi_device_always_present(struct acpi_device *adev) 612 { 613 return false; 614 } 615 #endif 616 617 #ifdef CONFIG_PM 618 void acpi_pm_wakeup_event(struct device *dev); 619 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev, 620 void (*func)(struct acpi_device_wakeup_context *context)); 621 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev); 622 bool acpi_pm_device_can_wakeup(struct device *dev); 623 int acpi_pm_device_sleep_state(struct device *, int *, int); 624 int acpi_pm_set_device_wakeup(struct device *dev, bool enable); 625 #else 626 static inline void acpi_pm_wakeup_event(struct device *dev) 627 { 628 } 629 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, 630 struct device *dev, 631 void (*func)(struct acpi_device_wakeup_context *context)) 632 { 633 return AE_SUPPORT; 634 } 635 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev) 636 { 637 return AE_SUPPORT; 638 } 639 static inline bool acpi_pm_device_can_wakeup(struct device *dev) 640 { 641 return false; 642 } 643 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) 644 { 645 if (p) 646 *p = ACPI_STATE_D0; 647 648 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ? 649 m : ACPI_STATE_D0; 650 } 651 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable) 652 { 653 return -ENODEV; 654 } 655 #endif 656 657 #ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT 658 bool acpi_sleep_state_supported(u8 sleep_state); 659 #else 660 static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; } 661 #endif 662 663 #ifdef CONFIG_ACPI_SLEEP 664 u32 acpi_target_system_state(void); 665 #else 666 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; } 667 #endif 668 669 static inline bool acpi_device_power_manageable(struct acpi_device *adev) 670 { 671 return adev->flags.power_manageable; 672 } 673 674 static inline bool acpi_device_can_wakeup(struct acpi_device *adev) 675 { 676 return adev->wakeup.flags.valid; 677 } 678 679 static inline bool acpi_device_can_poweroff(struct acpi_device *adev) 680 { 681 return adev->power.states[ACPI_STATE_D3_COLD].flags.valid || 682 ((acpi_gbl_FADT.header.revision < 6) && 683 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); 684 } 685 686 bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2); 687 688 struct acpi_device * 689 acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv); 690 struct acpi_device * 691 acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv); 692 693 /** 694 * for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria 695 * @adev: pointer to the matching ACPI device, NULL at the end of the loop 696 * @hid: Hardware ID of the device. 697 * @uid: Unique ID of the device, pass NULL to not check _UID 698 * @hrv: Hardware Revision of the device, pass -1 to not check _HRV 699 * 700 * The caller is responsible for invoking acpi_dev_put() on the returned device. 701 * 702 * FIXME: Due to above requirement there is a window that may invalidate @adev 703 * and next iteration will use a dangling pointer, e.g. in the case of a 704 * hotplug event. That said, the caller should ensure that this will never 705 * happen. 706 */ 707 #define for_each_acpi_dev_match(adev, hid, uid, hrv) \ 708 for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \ 709 adev; \ 710 adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv)) 711 712 static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev) 713 { 714 return adev ? to_acpi_device(get_device(&adev->dev)) : NULL; 715 } 716 717 static inline void acpi_dev_put(struct acpi_device *adev) 718 { 719 put_device(&adev->dev); 720 } 721 #else /* CONFIG_ACPI */ 722 723 static inline int register_acpi_bus_type(void *bus) { return 0; } 724 static inline int unregister_acpi_bus_type(void *bus) { return 0; } 725 726 #endif /* CONFIG_ACPI */ 727 728 #endif /*__ACPI_BUS_H__*/ 729