Merge tag 'media/v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[platform/kernel/linux-starfive.git] / include / acpi / acpi_bus.h
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 honor_deps:1;
206         u32 reserved:18;
207 };
208
209 /* File System */
210
211 struct acpi_device_dir {
212         struct proc_dir_entry *entry;
213 };
214
215 #define acpi_device_dir(d)      ((d)->dir.entry)
216
217 /* Plug and Play */
218
219 typedef char acpi_bus_id[8];
220 typedef u64 acpi_bus_address;
221 typedef char acpi_device_name[40];
222 typedef char acpi_device_class[20];
223
224 struct acpi_hardware_id {
225         struct list_head list;
226         const char *id;
227 };
228
229 struct acpi_pnp_type {
230         u32 hardware_id:1;
231         u32 bus_address:1;
232         u32 platform_id:1;
233         u32 reserved:29;
234 };
235
236 struct acpi_device_pnp {
237         acpi_bus_id bus_id;             /* Object name */
238         int instance_no;                /* Instance number of this object */
239         struct acpi_pnp_type type;      /* ID type */
240         acpi_bus_address bus_address;   /* _ADR */
241         char *unique_id;                /* _UID */
242         struct list_head ids;           /* _HID and _CIDs */
243         acpi_device_name device_name;   /* Driver-determined */
244         acpi_device_class device_class; /*        "          */
245         union acpi_object *str_obj;     /* unicode string for _STR method */
246 };
247
248 #define acpi_device_bid(d)      ((d)->pnp.bus_id)
249 #define acpi_device_adr(d)      ((d)->pnp.bus_address)
250 const char *acpi_device_hid(struct acpi_device *device);
251 #define acpi_device_uid(d)      ((d)->pnp.unique_id)
252 #define acpi_device_name(d)     ((d)->pnp.device_name)
253 #define acpi_device_class(d)    ((d)->pnp.device_class)
254
255 /* Power Management */
256
257 struct acpi_device_power_flags {
258         u32 explicit_get:1;     /* _PSC present? */
259         u32 power_resources:1;  /* Power resources */
260         u32 inrush_current:1;   /* Serialize Dx->D0 */
261         u32 power_removed:1;    /* Optimize Dx->D0 */
262         u32 ignore_parent:1;    /* Power is independent of parent power state */
263         u32 dsw_present:1;      /* _DSW present? */
264         u32 reserved:26;
265 };
266
267 struct acpi_device_power_state {
268         struct {
269                 u8 valid:1;
270                 u8 explicit_set:1;      /* _PSx present? */
271                 u8 reserved:6;
272         } flags;
273         int power;              /* % Power (compared to D0) */
274         int latency;            /* Dx->D0 time (microseconds) */
275         struct list_head resources;     /* Power resources referenced */
276 };
277
278 struct acpi_device_power {
279         int state;              /* Current state */
280         struct acpi_device_power_flags flags;
281         struct acpi_device_power_state states[ACPI_D_STATE_COUNT];      /* Power states (D0-D3Cold) */
282         u8 state_for_enumeration; /* Deepest power state for enumeration */
283 };
284
285 struct acpi_dep_data {
286         struct list_head node;
287         acpi_handle supplier;
288         acpi_handle consumer;
289         bool honor_dep;
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 struct acpi_device_properties {
346         const guid_t *guid;
347         union acpi_object *properties;
348         struct list_head list;
349         void **bufs;
350 };
351
352 /* ACPI Device Specific Data (_DSD) */
353 struct acpi_device_data {
354         const union acpi_object *pointer;
355         struct list_head properties;
356         const union acpi_object *of_compatible;
357         struct list_head subnodes;
358 };
359
360 struct acpi_gpio_mapping;
361
362 /* Device */
363 struct acpi_device {
364         u32 pld_crc;
365         int device_type;
366         acpi_handle handle;             /* no handle for fixed hardware */
367         struct fwnode_handle fwnode;
368         struct list_head wakeup_list;
369         struct list_head del_list;
370         struct acpi_device_status status;
371         struct acpi_device_flags flags;
372         struct acpi_device_pnp pnp;
373         struct acpi_device_power power;
374         struct acpi_device_wakeup wakeup;
375         struct acpi_device_perf performance;
376         struct acpi_device_dir dir;
377         struct acpi_device_data data;
378         struct acpi_scan_handler *handler;
379         struct acpi_hotplug_context *hp;
380         const struct acpi_gpio_mapping *driver_gpios;
381         void *driver_data;
382         struct device dev;
383         unsigned int physical_node_count;
384         unsigned int dep_unmet;
385         struct list_head physical_node_list;
386         struct mutex physical_node_lock;
387         void (*remove)(struct acpi_device *);
388 };
389
390 /* Non-device subnode */
391 struct acpi_data_node {
392         const char *name;
393         acpi_handle handle;
394         struct fwnode_handle fwnode;
395         struct fwnode_handle *parent;
396         struct acpi_device_data data;
397         struct list_head sibling;
398         struct kobject kobj;
399         struct completion kobj_done;
400 };
401
402 extern const struct fwnode_operations acpi_device_fwnode_ops;
403 extern const struct fwnode_operations acpi_data_fwnode_ops;
404 extern const struct fwnode_operations acpi_static_fwnode_ops;
405
406 bool is_acpi_device_node(const struct fwnode_handle *fwnode);
407 bool is_acpi_data_node(const struct fwnode_handle *fwnode);
408
409 static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
410 {
411         return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
412 }
413
414 #define to_acpi_device_node(__fwnode)                                   \
415         ({                                                              \
416                 typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
417                                                                         \
418                 is_acpi_device_node(__to_acpi_device_node_fwnode) ?     \
419                         container_of(__to_acpi_device_node_fwnode,      \
420                                      struct acpi_device, fwnode) :      \
421                         NULL;                                           \
422         })
423
424 #define to_acpi_data_node(__fwnode)                                     \
425         ({                                                              \
426                 typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
427                                                                         \
428                 is_acpi_data_node(__to_acpi_data_node_fwnode) ?         \
429                         container_of(__to_acpi_data_node_fwnode,        \
430                                      struct acpi_data_node, fwnode) :   \
431                         NULL;                                           \
432         })
433
434 static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
435 {
436         return !IS_ERR_OR_NULL(fwnode) &&
437                 fwnode->ops == &acpi_static_fwnode_ops;
438 }
439
440 static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
441                                         const char *name)
442 {
443         return is_acpi_data_node(fwnode) ?
444                 (!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
445 }
446
447 static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
448 {
449         return &adev->fwnode;
450 }
451
452 static inline void *acpi_driver_data(struct acpi_device *d)
453 {
454         return d->driver_data;
455 }
456
457 #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
458 #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
459
460 static inline struct acpi_device *acpi_dev_parent(struct acpi_device *adev)
461 {
462         if (adev->dev.parent)
463                 return to_acpi_device(adev->dev.parent);
464
465         return NULL;
466 }
467
468 static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
469 {
470         *((u32 *)&adev->status) = sta;
471 }
472
473 static inline void acpi_set_hp_context(struct acpi_device *adev,
474                                        struct acpi_hotplug_context *hp)
475 {
476         hp->self = adev;
477         adev->hp = hp;
478 }
479
480 void acpi_initialize_hp_context(struct acpi_device *adev,
481                                 struct acpi_hotplug_context *hp,
482                                 int (*notify)(struct acpi_device *, u32),
483                                 void (*uevent)(struct acpi_device *, u32));
484
485 /* acpi_device.dev.bus == &acpi_bus_type */
486 extern struct bus_type acpi_bus_type;
487
488 int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data);
489 int acpi_dev_for_each_child(struct acpi_device *adev,
490                             int (*fn)(struct acpi_device *, void *), void *data);
491 int acpi_dev_for_each_child_reverse(struct acpi_device *adev,
492                                     int (*fn)(struct acpi_device *, void *),
493                                     void *data);
494
495 /*
496  * Events
497  * ------
498  */
499
500 struct acpi_bus_event {
501         struct list_head node;
502         acpi_device_class device_class;
503         acpi_bus_id bus_id;
504         u32 type;
505         u32 data;
506 };
507
508 extern struct kobject *acpi_kobj;
509 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
510 void acpi_bus_private_data_handler(acpi_handle, void *);
511 int acpi_bus_get_private_data(acpi_handle, void **);
512 int acpi_bus_attach_private_data(acpi_handle, void *);
513 void acpi_bus_detach_private_data(acpi_handle);
514 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
515 extern int register_acpi_notifier(struct notifier_block *);
516 extern int unregister_acpi_notifier(struct notifier_block *);
517
518 /*
519  * External Functions
520  */
521
522 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
523                                        unsigned long long *sta);
524 int acpi_bus_get_status(struct acpi_device *device);
525
526 int acpi_bus_set_power(acpi_handle handle, int state);
527 const char *acpi_power_state_string(int state);
528 int acpi_device_set_power(struct acpi_device *device, int state);
529 int acpi_bus_init_power(struct acpi_device *device);
530 int acpi_device_fix_up_power(struct acpi_device *device);
531 void acpi_device_fix_up_power_extended(struct acpi_device *adev);
532 int acpi_bus_update_power(acpi_handle handle, int *state_p);
533 int acpi_device_update_power(struct acpi_device *device, int *state_p);
534 bool acpi_bus_power_manageable(acpi_handle handle);
535 void acpi_dev_power_up_children_with_adr(struct acpi_device *adev);
536 int acpi_device_power_add_dependent(struct acpi_device *adev,
537                                     struct device *dev);
538 void acpi_device_power_remove_dependent(struct acpi_device *adev,
539                                         struct device *dev);
540
541 #ifdef CONFIG_PM
542 bool acpi_bus_can_wakeup(acpi_handle handle);
543 #else
544 static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
545 #endif
546
547 void acpi_scan_lock_acquire(void);
548 void acpi_scan_lock_release(void);
549 void acpi_lock_hp_context(void);
550 void acpi_unlock_hp_context(void);
551 int acpi_scan_add_handler(struct acpi_scan_handler *handler);
552 int acpi_bus_register_driver(struct acpi_driver *driver);
553 void acpi_bus_unregister_driver(struct acpi_driver *driver);
554 int acpi_bus_scan(acpi_handle handle);
555 void acpi_bus_trim(struct acpi_device *start);
556 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
557 int acpi_match_device_ids(struct acpi_device *device,
558                           const struct acpi_device_id *ids);
559 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
560                        char *modalias, size_t len);
561 int acpi_create_dir(struct acpi_device *);
562 void acpi_remove_dir(struct acpi_device *);
563
564 static inline bool acpi_device_enumerated(struct acpi_device *adev)
565 {
566         return adev && adev->flags.initialized && adev->flags.visited;
567 }
568
569 /**
570  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
571  * @__acpi_driver: acpi_driver struct
572  *
573  * Helper macro for ACPI drivers which do not do anything special in module
574  * init/exit. This eliminates a lot of boilerplate. Each module may only
575  * use this macro once, and calling it replaces module_init() and module_exit()
576  */
577 #define module_acpi_driver(__acpi_driver) \
578         module_driver(__acpi_driver, acpi_bus_register_driver, \
579                       acpi_bus_unregister_driver)
580
581 /*
582  * Bind physical devices with ACPI devices
583  */
584 struct acpi_bus_type {
585         struct list_head list;
586         const char *name;
587         bool (*match)(struct device *dev);
588         struct acpi_device * (*find_companion)(struct device *);
589         void (*setup)(struct device *);
590 };
591 int register_acpi_bus_type(struct acpi_bus_type *);
592 int unregister_acpi_bus_type(struct acpi_bus_type *);
593 int acpi_bind_one(struct device *dev, struct acpi_device *adev);
594 int acpi_unbind_one(struct device *dev);
595
596 enum acpi_bridge_type {
597         ACPI_BRIDGE_TYPE_PCIE = 1,
598         ACPI_BRIDGE_TYPE_CXL,
599 };
600
601 struct acpi_pci_root {
602         struct acpi_device * device;
603         struct pci_bus *bus;
604         u16 segment;
605         int bridge_type;
606         struct resource secondary;      /* downstream bus range */
607
608         u32 osc_support_set;            /* _OSC state of support bits */
609         u32 osc_control_set;            /* _OSC state of control bits */
610         u32 osc_ext_support_set;        /* _OSC state of extended support bits */
611         u32 osc_ext_control_set;        /* _OSC state of extended control bits */
612         phys_addr_t mcfg_addr;
613 };
614
615 /* helper */
616
617 bool acpi_dma_supported(const struct acpi_device *adev);
618 enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
619 int acpi_iommu_fwspec_init(struct device *dev, u32 id,
620                            struct fwnode_handle *fwnode,
621                            const struct iommu_ops *ops);
622 int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map);
623 int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
624                            const u32 *input_id);
625 static inline int acpi_dma_configure(struct device *dev,
626                                      enum dev_dma_attr attr)
627 {
628         return acpi_dma_configure_id(dev, attr, NULL);
629 }
630 struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
631                                            u64 address, bool check_children);
632 struct acpi_device *acpi_find_child_by_adr(struct acpi_device *adev,
633                                            acpi_bus_address adr);
634 int acpi_is_root_bridge(acpi_handle);
635 struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
636
637 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
638 int acpi_disable_wakeup_device_power(struct acpi_device *dev);
639
640 #ifdef CONFIG_X86
641 bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status);
642 bool acpi_quirk_skip_acpi_ac_and_battery(void);
643 #else
644 static inline bool acpi_device_override_status(struct acpi_device *adev,
645                                                unsigned long long *status)
646 {
647         return false;
648 }
649 static inline bool acpi_quirk_skip_acpi_ac_and_battery(void)
650 {
651         return false;
652 }
653 #endif
654
655 #if IS_ENABLED(CONFIG_X86_ANDROID_TABLETS)
656 bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev);
657 int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip);
658 #else
659 static inline bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
660 {
661         return false;
662 }
663 static inline int
664 acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
665 {
666         *skip = false;
667         return 0;
668 }
669 #endif
670
671 #ifdef CONFIG_PM
672 void acpi_pm_wakeup_event(struct device *dev);
673 acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
674                         void (*func)(struct acpi_device_wakeup_context *context));
675 acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
676 bool acpi_pm_device_can_wakeup(struct device *dev);
677 int acpi_pm_device_sleep_state(struct device *, int *, int);
678 int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
679 #else
680 static inline void acpi_pm_wakeup_event(struct device *dev)
681 {
682 }
683 static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
684                                                struct device *dev,
685                                                void (*func)(struct acpi_device_wakeup_context *context))
686 {
687         return AE_SUPPORT;
688 }
689 static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
690 {
691         return AE_SUPPORT;
692 }
693 static inline bool acpi_pm_device_can_wakeup(struct device *dev)
694 {
695         return false;
696 }
697 static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
698 {
699         if (p)
700                 *p = ACPI_STATE_D0;
701
702         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
703                 m : ACPI_STATE_D0;
704 }
705 static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
706 {
707         return -ENODEV;
708 }
709 #endif
710
711 #ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT
712 bool acpi_sleep_state_supported(u8 sleep_state);
713 #else
714 static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; }
715 #endif
716
717 #ifdef CONFIG_ACPI_SLEEP
718 u32 acpi_target_system_state(void);
719 #else
720 static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
721 #endif
722
723 static inline bool acpi_device_power_manageable(struct acpi_device *adev)
724 {
725         return adev->flags.power_manageable;
726 }
727
728 static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
729 {
730         return adev->wakeup.flags.valid;
731 }
732
733 static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
734 {
735         return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
736                 ((acpi_gbl_FADT.header.revision < 6) &&
737                 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
738 }
739
740 bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2);
741 int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer);
742
743 void acpi_dev_clear_dependencies(struct acpi_device *supplier);
744 bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);
745 struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier,
746                                                    struct acpi_device *start);
747
748 /**
749  * for_each_acpi_consumer_dev - iterate over the consumer ACPI devices for a
750  *                              given supplier
751  * @supplier: Pointer to the supplier's ACPI device
752  * @consumer: Pointer to &struct acpi_device to hold the consumer, initially NULL
753  */
754 #define for_each_acpi_consumer_dev(supplier, consumer)                  \
755         for (consumer = acpi_dev_get_next_consumer_dev(supplier, NULL); \
756              consumer;                                                  \
757              consumer = acpi_dev_get_next_consumer_dev(supplier, consumer))
758
759 struct acpi_device *
760 acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
761 struct acpi_device *
762 acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);
763
764 /**
765  * for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria
766  * @adev: pointer to the matching ACPI device, NULL at the end of the loop
767  * @hid: Hardware ID of the device.
768  * @uid: Unique ID of the device, pass NULL to not check _UID
769  * @hrv: Hardware Revision of the device, pass -1 to not check _HRV
770  *
771  * The caller is responsible for invoking acpi_dev_put() on the returned device.
772  */
773 #define for_each_acpi_dev_match(adev, hid, uid, hrv)                    \
774         for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv);        \
775              adev;                                                      \
776              adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv))
777
778 static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev)
779 {
780         return adev ? to_acpi_device(get_device(&adev->dev)) : NULL;
781 }
782
783 static inline void acpi_dev_put(struct acpi_device *adev)
784 {
785         if (adev)
786                 put_device(&adev->dev);
787 }
788
789 struct acpi_device *acpi_fetch_acpi_dev(acpi_handle handle);
790 struct acpi_device *acpi_get_acpi_dev(acpi_handle handle);
791
792 static inline void acpi_put_acpi_dev(struct acpi_device *adev)
793 {
794         acpi_dev_put(adev);
795 }
796 #else   /* CONFIG_ACPI */
797
798 static inline int register_acpi_bus_type(void *bus) { return 0; }
799 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
800
801 #endif                          /* CONFIG_ACPI */
802
803 #endif /*__ACPI_BUS_H__*/