1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
10 #define __ACPI_BUS_H__
12 #include <linux/device.h>
13 #include <linux/property.h>
15 /* TBD: Make dynamic */
16 #define ACPI_MAX_HANDLES 10
17 struct acpi_handle_list {
19 acpi_handle handles[ACPI_MAX_HANDLES];
24 acpi_extract_package(union acpi_object *package,
25 struct acpi_buffer *format, struct acpi_buffer *buffer);
27 acpi_evaluate_integer(acpi_handle handle,
29 struct acpi_object_list *arguments, unsigned long long *data);
31 acpi_evaluate_reference(acpi_handle handle,
33 struct acpi_object_list *arguments,
34 struct acpi_handle_list *list);
36 acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
37 struct acpi_buffer *status_buf);
40 acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
42 bool acpi_has_method(acpi_handle handle, char *name);
43 acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
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);
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);
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)
61 union acpi_object *obj;
63 obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4);
64 if (obj && obj->type != type) {
73 #define ACPI_INIT_DSM_ARGV4(cnt, eles) \
75 .package.type = ACPI_TYPE_PACKAGE, \
76 .package.count = (cnt), \
77 .package.elements = (eles) \
80 bool acpi_dev_found(const char *hid);
81 bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
82 bool acpi_reduced_hardware(void);
86 struct proc_dir_entry;
88 #define ACPI_BUS_FILE_ROOT "acpi"
89 extern struct proc_dir_entry *acpi_root_dir;
91 enum acpi_bus_device_type {
92 ACPI_BUS_TYPE_DEVICE = 0,
94 ACPI_BUS_TYPE_PROCESSOR,
95 ACPI_BUS_TYPE_THERMAL,
96 ACPI_BUS_TYPE_POWER_BUTTON,
97 ACPI_BUS_TYPE_SLEEP_BUTTON,
98 ACPI_BUS_TYPE_ECDT_EC,
99 ACPI_BUS_DEVICE_TYPE_COUNT
110 struct acpi_hotplug_profile {
112 int (*scan_dependent)(struct acpi_device *adev);
113 void (*notify_online)(struct acpi_device *adev);
115 bool demand_offline:1;
118 static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
119 struct kobject *kobj)
121 return container_of(kobj, struct acpi_hotplug_profile, kobj);
124 struct acpi_scan_handler {
125 const struct acpi_device_id *ids;
126 struct list_head list_node;
127 bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
128 int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
129 void (*detach)(struct acpi_device *dev);
130 void (*bind)(struct device *phys_dev);
131 void (*unbind)(struct device *phys_dev);
132 struct acpi_hotplug_profile hotplug;
136 * ACPI Hotplug Context
137 * --------------------
140 struct acpi_hotplug_context {
141 struct acpi_device *self;
142 int (*notify)(struct acpi_device *, u32);
143 void (*uevent)(struct acpi_device *, u32);
144 void (*fixup)(struct acpi_device *);
152 typedef int (*acpi_op_add) (struct acpi_device * device);
153 typedef void (*acpi_op_remove) (struct acpi_device *device);
154 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
156 struct acpi_device_ops {
158 acpi_op_remove remove;
159 acpi_op_notify notify;
162 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */
167 const struct acpi_device_id *ids; /* Supported Hardware IDs */
169 struct acpi_device_ops ops;
170 struct device_driver drv;
171 struct module *owner;
181 struct acpi_device_status {
186 u32 battery_present:1;
192 struct acpi_device_flags {
193 u32 dynamic_status:1;
196 u32 power_manageable:1;
200 u32 hotplug_notify:1;
201 u32 is_dock_station:1;
202 u32 of_compatible_ok:1;
205 u32 enumeration_by_parent:1;
212 struct acpi_device_dir {
213 struct proc_dir_entry *entry;
216 #define acpi_device_dir(d) ((d)->dir.entry)
220 typedef char acpi_bus_id[8];
221 typedef u64 acpi_bus_address;
222 typedef char acpi_device_name[40];
223 typedef char acpi_device_class[20];
225 struct acpi_hardware_id {
226 struct list_head list;
230 struct acpi_pnp_type {
238 struct acpi_device_pnp {
239 acpi_bus_id bus_id; /* Object name */
240 int instance_no; /* Instance number of this object */
241 struct acpi_pnp_type type; /* ID type */
242 acpi_bus_address bus_address; /* _ADR */
243 char *unique_id; /* _UID */
244 struct list_head ids; /* _HID and _CIDs */
245 acpi_device_name device_name; /* Driver-determined */
246 acpi_device_class device_class; /* " */
247 union acpi_object *str_obj; /* unicode string for _STR method */
250 #define acpi_device_bid(d) ((d)->pnp.bus_id)
251 #define acpi_device_adr(d) ((d)->pnp.bus_address)
252 const char *acpi_device_hid(struct acpi_device *device);
253 #define acpi_device_uid(d) ((d)->pnp.unique_id)
254 #define acpi_device_name(d) ((d)->pnp.device_name)
255 #define acpi_device_class(d) ((d)->pnp.device_class)
257 /* Power Management */
259 struct acpi_device_power_flags {
260 u32 explicit_get:1; /* _PSC present? */
261 u32 power_resources:1; /* Power resources */
262 u32 inrush_current:1; /* Serialize Dx->D0 */
263 u32 power_removed:1; /* Optimize Dx->D0 */
264 u32 ignore_parent:1; /* Power is independent of parent power state */
265 u32 dsw_present:1; /* _DSW present? */
269 struct acpi_device_power_state {
272 u8 explicit_set:1; /* _PSx present? */
275 int power; /* % Power (compared to D0) */
276 int latency; /* Dx->D0 time (microseconds) */
277 struct list_head resources; /* Power resources referenced */
280 struct acpi_device_power {
281 int state; /* Current state */
282 struct acpi_device_power_flags flags;
283 struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */
284 u8 state_for_enumeration; /* Deepest power state for enumeration */
287 struct acpi_dep_data {
288 struct list_head node;
289 acpi_handle supplier;
290 acpi_handle consumer;
296 /* Performance Management */
298 struct acpi_device_perf_flags {
302 struct acpi_device_perf_state {
307 u8 power; /* % Power (compared to P0) */
308 u8 performance; /* % Performance ( " ) */
309 int latency; /* Px->P0 time (microseconds) */
312 struct acpi_device_perf {
314 struct acpi_device_perf_flags flags;
316 struct acpi_device_perf_state *states;
319 /* Wakeup Management */
320 struct acpi_device_wakeup_flags {
321 u8 valid:1; /* Can successfully enable wakeup? */
322 u8 notifier_present:1; /* Wake-up notify handler has been installed */
325 struct acpi_device_wakeup_context {
326 void (*func)(struct acpi_device_wakeup_context *context);
330 struct acpi_device_wakeup {
331 acpi_handle gpe_device;
334 struct list_head resources;
335 struct acpi_device_wakeup_flags flags;
336 struct acpi_device_wakeup_context context;
337 struct wakeup_source *ws;
342 struct acpi_device_physical_node {
343 unsigned int node_id;
344 struct list_head node;
349 struct acpi_device_properties {
351 union acpi_object *properties;
352 struct list_head list;
356 /* ACPI Device Specific Data (_DSD) */
357 struct acpi_device_data {
358 const union acpi_object *pointer;
359 struct list_head properties;
360 const union acpi_object *of_compatible;
361 struct list_head subnodes;
364 struct acpi_gpio_mapping;
370 acpi_handle handle; /* no handle for fixed hardware */
371 struct fwnode_handle fwnode;
372 struct list_head wakeup_list;
373 struct list_head del_list;
374 struct acpi_device_status status;
375 struct acpi_device_flags flags;
376 struct acpi_device_pnp pnp;
377 struct acpi_device_power power;
378 struct acpi_device_wakeup wakeup;
379 struct acpi_device_perf performance;
380 struct acpi_device_dir dir;
381 struct acpi_device_data data;
382 struct acpi_scan_handler *handler;
383 struct acpi_hotplug_context *hp;
384 const struct acpi_gpio_mapping *driver_gpios;
387 unsigned int physical_node_count;
388 unsigned int dep_unmet;
389 struct list_head physical_node_list;
390 struct mutex physical_node_lock;
391 void (*remove)(struct acpi_device *);
394 /* Non-device subnode */
395 struct acpi_data_node {
398 struct fwnode_handle fwnode;
399 struct fwnode_handle *parent;
400 struct acpi_device_data data;
401 struct list_head sibling;
403 struct completion kobj_done;
406 extern const struct fwnode_operations acpi_device_fwnode_ops;
407 extern const struct fwnode_operations acpi_data_fwnode_ops;
408 extern const struct fwnode_operations acpi_static_fwnode_ops;
410 bool is_acpi_device_node(const struct fwnode_handle *fwnode);
411 bool is_acpi_data_node(const struct fwnode_handle *fwnode);
413 static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
415 return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
418 #define to_acpi_device_node(__fwnode) \
420 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
422 is_acpi_device_node(__to_acpi_device_node_fwnode) ? \
423 container_of(__to_acpi_device_node_fwnode, \
424 struct acpi_device, fwnode) : \
428 #define to_acpi_data_node(__fwnode) \
430 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
432 is_acpi_data_node(__to_acpi_data_node_fwnode) ? \
433 container_of(__to_acpi_data_node_fwnode, \
434 struct acpi_data_node, fwnode) : \
438 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
440 return !IS_ERR_OR_NULL(fwnode) &&
441 fwnode->ops == &acpi_static_fwnode_ops;
444 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
447 return is_acpi_data_node(fwnode) ?
448 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
451 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
453 return &adev->fwnode;
456 static inline void *acpi_driver_data(struct acpi_device *d)
458 return d->driver_data;
461 #define to_acpi_device(d) container_of(d, struct acpi_device, dev)
462 #define to_acpi_driver(d) container_of(d, struct acpi_driver, drv)
464 static inline struct acpi_device *acpi_dev_parent(struct acpi_device *adev)
466 if (adev->dev.parent)
467 return to_acpi_device(adev->dev.parent);
472 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
474 *((u32 *)&adev->status) = sta;
477 static inline void acpi_set_hp_context(struct acpi_device *adev,
478 struct acpi_hotplug_context *hp)
484 void acpi_initialize_hp_context(struct acpi_device *adev,
485 struct acpi_hotplug_context *hp,
486 int (*notify)(struct acpi_device *, u32),
487 void (*uevent)(struct acpi_device *, u32));
489 /* acpi_device.dev.bus == &acpi_bus_type */
490 extern struct bus_type acpi_bus_type;
492 int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data);
493 int acpi_dev_for_each_child(struct acpi_device *adev,
494 int (*fn)(struct acpi_device *, void *), void *data);
495 int acpi_dev_for_each_child_reverse(struct acpi_device *adev,
496 int (*fn)(struct acpi_device *, void *),
504 struct acpi_bus_event {
505 struct list_head node;
506 acpi_device_class device_class;
512 extern struct kobject *acpi_kobj;
513 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
514 void acpi_bus_private_data_handler(acpi_handle, void *);
515 int acpi_bus_get_private_data(acpi_handle, void **);
516 int acpi_bus_attach_private_data(acpi_handle, void *);
517 void acpi_bus_detach_private_data(acpi_handle);
518 int acpi_dev_install_notify_handler(struct acpi_device *adev,
520 acpi_notify_handler handler);
521 void acpi_dev_remove_notify_handler(struct acpi_device *adev,
523 acpi_notify_handler handler);
524 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
525 extern int register_acpi_notifier(struct notifier_block *);
526 extern int unregister_acpi_notifier(struct notifier_block *);
532 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
533 unsigned long long *sta);
534 int acpi_bus_get_status(struct acpi_device *device);
536 int acpi_bus_set_power(acpi_handle handle, int state);
537 const char *acpi_power_state_string(int state);
538 int acpi_device_set_power(struct acpi_device *device, int state);
539 int acpi_bus_init_power(struct acpi_device *device);
540 int acpi_device_fix_up_power(struct acpi_device *device);
541 void acpi_device_fix_up_power_extended(struct acpi_device *adev);
542 void acpi_device_fix_up_power_children(struct acpi_device *adev);
543 int acpi_bus_update_power(acpi_handle handle, int *state_p);
544 int acpi_device_update_power(struct acpi_device *device, int *state_p);
545 bool acpi_bus_power_manageable(acpi_handle handle);
546 void acpi_dev_power_up_children_with_adr(struct acpi_device *adev);
547 u8 acpi_dev_power_state_for_wake(struct acpi_device *adev);
548 int acpi_device_power_add_dependent(struct acpi_device *adev,
550 void acpi_device_power_remove_dependent(struct acpi_device *adev,
554 bool acpi_bus_can_wakeup(acpi_handle handle);
556 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
559 void acpi_scan_lock_acquire(void);
560 void acpi_scan_lock_release(void);
561 void acpi_lock_hp_context(void);
562 void acpi_unlock_hp_context(void);
563 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
564 int acpi_bus_register_driver(struct acpi_driver *driver);
565 void acpi_bus_unregister_driver(struct acpi_driver *driver);
566 int acpi_bus_scan(acpi_handle handle);
567 void acpi_bus_trim(struct acpi_device *start);
568 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
569 int acpi_match_device_ids(struct acpi_device *device,
570 const struct acpi_device_id *ids);
571 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
572 char *modalias, size_t len);
574 static inline bool acpi_device_enumerated(struct acpi_device *adev)
576 return adev && adev->flags.initialized && adev->flags.visited;
580 * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
581 * @__acpi_driver: acpi_driver struct
583 * Helper macro for ACPI drivers which do not do anything special in module
584 * init/exit. This eliminates a lot of boilerplate. Each module may only
585 * use this macro once, and calling it replaces module_init() and module_exit()
587 #define module_acpi_driver(__acpi_driver) \
588 module_driver(__acpi_driver, acpi_bus_register_driver, \
589 acpi_bus_unregister_driver)
592 * Bind physical devices with ACPI devices
594 struct acpi_bus_type {
595 struct list_head list;
597 bool (*match)(struct device *dev);
598 struct acpi_device * (*find_companion)(struct device *);
599 void (*setup)(struct device *);
601 int register_acpi_bus_type(struct acpi_bus_type *);
602 int unregister_acpi_bus_type(struct acpi_bus_type *);
603 int acpi_bind_one(struct device *dev, struct acpi_device *adev);
604 int acpi_unbind_one(struct device *dev);
606 enum acpi_bridge_type {
607 ACPI_BRIDGE_TYPE_PCIE = 1,
608 ACPI_BRIDGE_TYPE_CXL,
611 struct acpi_pci_root {
612 struct acpi_device * device;
616 struct resource secondary; /* downstream bus range */
618 u32 osc_support_set; /* _OSC state of support bits */
619 u32 osc_control_set; /* _OSC state of control bits */
620 u32 osc_ext_support_set; /* _OSC state of extended support bits */
621 u32 osc_ext_control_set; /* _OSC state of extended control bits */
622 phys_addr_t mcfg_addr;
627 bool acpi_dma_supported(const struct acpi_device *adev);
628 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
629 int acpi_iommu_fwspec_init(struct device *dev, u32 id,
630 struct fwnode_handle *fwnode,
631 const struct iommu_ops *ops);
632 int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map);
633 int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
634 const u32 *input_id);
635 static inline int acpi_dma_configure(struct device *dev,
636 enum dev_dma_attr attr)
638 return acpi_dma_configure_id(dev, attr, NULL);
640 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
641 u64 address, bool check_children);
642 struct acpi_device *acpi_find_child_by_adr(struct acpi_device *adev,
643 acpi_bus_address adr);
644 int acpi_is_root_bridge(acpi_handle);
645 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
647 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
648 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
651 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status);
652 bool acpi_quirk_skip_acpi_ac_and_battery(void);
653 int acpi_install_cmos_rtc_space_handler(acpi_handle handle);
654 void acpi_remove_cmos_rtc_space_handler(acpi_handle handle);
655 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip);
657 static inline bool acpi_device_override_status(struct acpi_device *adev,
658 unsigned long long *status)
662 static inline bool acpi_quirk_skip_acpi_ac_and_battery(void)
666 static inline int acpi_install_cmos_rtc_space_handler(acpi_handle handle)
670 static inline void acpi_remove_cmos_rtc_space_handler(acpi_handle handle)
674 acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
681 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
682 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev);
683 bool acpi_quirk_skip_gpio_event_handlers(void);
685 static inline bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
689 static inline bool acpi_quirk_skip_gpio_event_handlers(void)
696 void acpi_pm_wakeup_event(struct device *dev);
697 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
698 void (*func)(struct acpi_device_wakeup_context *context));
699 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
700 bool acpi_pm_device_can_wakeup(struct device *dev);
701 int acpi_pm_device_sleep_state(struct device *, int *, int);
702 int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
704 static inline void acpi_pm_wakeup_event(struct device *dev)
707 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
709 void (*func)(struct acpi_device_wakeup_context *context))
713 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
717 static inline bool acpi_pm_device_can_wakeup(struct device *dev)
721 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
726 return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
729 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
735 #ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT
736 bool acpi_sleep_state_supported(u8 sleep_state);
738 static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; }
741 #ifdef CONFIG_ACPI_SLEEP
742 u32 acpi_target_system_state(void);
744 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
747 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
749 return adev->flags.power_manageable;
752 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
754 return adev->wakeup.flags.valid;
757 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
759 return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
760 ((acpi_gbl_FADT.header.revision < 6) &&
761 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
764 bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);
765 int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer);
767 void acpi_dev_clear_dependencies(struct acpi_device *supplier);
768 bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);
769 struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier,
770 struct acpi_device *start);
773 * for_each_acpi_consumer_dev - iterate over the consumer ACPI devices for a
775 * @supplier: Pointer to the supplier's ACPI device
776 * @consumer: Pointer to &struct acpi_device to hold the consumer, initially NULL
778 #define for_each_acpi_consumer_dev(supplier, consumer) \
779 for (consumer = acpi_dev_get_next_consumer_dev(supplier, NULL); \
781 consumer = acpi_dev_get_next_consumer_dev(supplier, consumer))
784 acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
786 acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);
789 * for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria
790 * @adev: pointer to the matching ACPI device, NULL at the end of the loop
791 * @hid: Hardware ID of the device.
792 * @uid: Unique ID of the device, pass NULL to not check _UID
793 * @hrv: Hardware Revision of the device, pass -1 to not check _HRV
795 * The caller is responsible for invoking acpi_dev_put() on the returned device.
797 #define for_each_acpi_dev_match(adev, hid, uid, hrv) \
798 for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \
800 adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv))
802 static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev)
804 return adev ? to_acpi_device(get_device(&adev->dev)) : NULL;
807 static inline void acpi_dev_put(struct acpi_device *adev)
810 put_device(&adev->dev);
813 struct acpi_device *acpi_fetch_acpi_dev(acpi_handle handle);
814 struct acpi_device *acpi_get_acpi_dev(acpi_handle handle);
816 static inline void acpi_put_acpi_dev(struct acpi_device *adev)
820 #else /* CONFIG_ACPI */
822 static inline int register_acpi_bus_type(void *bus) { return 0; }
823 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
825 #endif /* CONFIG_ACPI */
827 #endif /*__ACPI_BUS_H__*/