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  1. /*
  2.  *  acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
  3.  *
  4.  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
  5.  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
  6.  *
  7.  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  8.  *
  9.  *  This program is free software; you can redistribute it and/or modify
  10.  *  it under the terms of the GNU General Public License as published by
  11.  *  the Free Software Foundation; either version 2 of the License, or (at
  12.  *  your option) any later version.
  13.  *
  14.  *  This program is distributed in the hope that it will be useful, but
  15.  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  16.  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17.  *  General Public License for more details.
  18.  *
  19.  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  20.  */
  21.  
  22. #ifndef __ACPI_BUS_H__
  23. #define __ACPI_BUS_H__
  24.  
  25. #include <linux/device.h>
  26. #include <linux/property.h>
  27.  
  28. /* TBD: Make dynamic */
  29. #define ACPI_MAX_HANDLES        10
  30. struct acpi_handle_list {
  31.         u32 count;
  32.         acpi_handle handles[ACPI_MAX_HANDLES];
  33. };
  34.  
  35. /* acpi_utils.h */
  36. acpi_status
  37. acpi_extract_package(union acpi_object *package,
  38.                      struct acpi_buffer *format, struct acpi_buffer *buffer);
  39. acpi_status
  40. acpi_evaluate_integer(acpi_handle handle,
  41.                       acpi_string pathname,
  42.                       struct acpi_object_list *arguments, unsigned long long *data);
  43. acpi_status
  44. acpi_evaluate_reference(acpi_handle handle,
  45.                         acpi_string pathname,
  46.                         struct acpi_object_list *arguments,
  47.                         struct acpi_handle_list *list);
  48. acpi_status
  49. acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
  50.                   struct acpi_buffer *status_buf);
  51.  
  52. acpi_status
  53. acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
  54.  
  55. bool acpi_has_method(acpi_handle handle, char *name);
  56. acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
  57.                                        u64 arg);
  58. acpi_status acpi_evaluate_ej0(acpi_handle handle);
  59. acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
  60. bool acpi_ata_match(acpi_handle handle);
  61. bool acpi_bay_match(acpi_handle handle);
  62. bool acpi_dock_match(acpi_handle handle);
  63.  
  64. bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, int rev, u64 funcs);
  65. union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
  66.                         int rev, int func, union acpi_object *argv4);
  67.  
  68. static inline union acpi_object *
  69. acpi_evaluate_dsm_typed(acpi_handle handle, const u8 *uuid, int rev, int func,
  70.                         union acpi_object *argv4, acpi_object_type type)
  71. {
  72.         union acpi_object *obj;
  73.  
  74.         obj = acpi_evaluate_dsm(handle, uuid, rev, func, argv4);
  75.         if (obj && obj->type != type) {
  76.                 ACPI_FREE(obj);
  77.                 obj = NULL;
  78.         }
  79.  
  80.         return obj;
  81. }
  82.  
  83. #define ACPI_INIT_DSM_ARGV4(cnt, eles)                  \
  84.         {                                               \
  85.           .package.type = ACPI_TYPE_PACKAGE,            \
  86.           .package.count = (cnt),                       \
  87.           .package.elements = (eles)                    \
  88.         }
  89.  
  90. #ifdef CONFIG_ACPI
  91.  
  92. #define ACPI_BUS_FILE_ROOT      "acpi"
  93.  
  94. enum acpi_bus_device_type {
  95.         ACPI_BUS_TYPE_DEVICE = 0,
  96.         ACPI_BUS_TYPE_POWER,
  97.         ACPI_BUS_TYPE_PROCESSOR,
  98.         ACPI_BUS_TYPE_THERMAL,
  99.         ACPI_BUS_TYPE_POWER_BUTTON,
  100.         ACPI_BUS_TYPE_SLEEP_BUTTON,
  101.         ACPI_BUS_DEVICE_TYPE_COUNT
  102. };
  103.  
  104. struct acpi_driver;
  105. struct acpi_device;
  106.  
  107. /*
  108.  * ACPI Scan Handler
  109.  * -----------------
  110.  */
  111.  
  112. struct acpi_hotplug_profile {
  113.         struct kobject kobj;
  114.         int (*scan_dependent)(struct acpi_device *adev);
  115.         void (*notify_online)(struct acpi_device *adev);
  116.         bool enabled:1;
  117.         bool demand_offline:1;
  118. };
  119.  
  120. static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
  121.                                                 struct kobject *kobj)
  122. {
  123.         return container_of(kobj, struct acpi_hotplug_profile, kobj);
  124. }
  125.  
  126. struct acpi_scan_handler {
  127.         const struct acpi_device_id *ids;
  128.         struct list_head list_node;
  129.         bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
  130.         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
  131.         void (*detach)(struct acpi_device *dev);
  132.         void (*bind)(struct device *phys_dev);
  133.         void (*unbind)(struct device *phys_dev);
  134.         struct acpi_hotplug_profile hotplug;
  135. };
  136.  
  137. /*
  138.  * ACPI Hotplug Context
  139.  * --------------------
  140.  */
  141.  
  142. struct acpi_hotplug_context {
  143.         struct acpi_device *self;
  144.         int (*notify)(struct acpi_device *, u32);
  145.         void (*uevent)(struct acpi_device *, u32);
  146.         void (*fixup)(struct acpi_device *);
  147. };
  148.  
  149. /*
  150.  * ACPI Driver
  151.  * -----------
  152.  */
  153.  
  154. typedef int (*acpi_op_add) (struct acpi_device * device);
  155. typedef int (*acpi_op_remove) (struct acpi_device * device);
  156. typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
  157.  
  158. struct acpi_device_ops {
  159.         acpi_op_add add;
  160.         acpi_op_remove remove;
  161.         acpi_op_notify notify;
  162. };
  163.  
  164. #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
  165.  
  166. struct acpi_driver {
  167.         char name[80];
  168.         char class[80];
  169.         const struct acpi_device_id *ids; /* Supported Hardware IDs */
  170.         unsigned int flags;
  171.         struct acpi_device_ops ops;
  172.         struct device_driver drv;
  173.         struct module *owner;
  174. };
  175.  
  176. /*
  177.  * ACPI Device
  178.  * -----------
  179.  */
  180.  
  181. /* Status (_STA) */
  182.  
  183. struct acpi_device_status {
  184.         u32 present:1;
  185.         u32 enabled:1;
  186.         u32 show_in_ui:1;
  187.         u32 functional:1;
  188.         u32 battery_present:1;
  189.         u32 reserved:27;
  190. };
  191.  
  192. /* Flags */
  193.  
  194. struct acpi_device_flags {
  195.         u32 dynamic_status:1;
  196.         u32 removable:1;
  197.         u32 ejectable:1;
  198.         u32 power_manageable:1;
  199.         u32 match_driver:1;
  200.         u32 initialized:1;
  201.         u32 visited:1;
  202.         u32 hotplug_notify:1;
  203.         u32 is_dock_station:1;
  204.         u32 of_compatible_ok:1;
  205.         u32 coherent_dma:1;
  206.         u32 cca_seen:1;
  207.         u32 reserved:20;
  208. };
  209.  
  210. /* File System */
  211.  
  212. struct acpi_device_dir {
  213.         struct proc_dir_entry *entry;
  214. };
  215.  
  216. #define acpi_device_dir(d)      ((d)->dir.entry)
  217.  
  218. /* Plug and Play */
  219.  
  220. typedef char acpi_bus_id[8];
  221. typedef unsigned long acpi_bus_address;
  222. typedef char acpi_device_name[40];
  223. typedef char acpi_device_class[20];
  224.  
  225. struct acpi_hardware_id {
  226.         struct list_head list;
  227.         const char *id;
  228. };
  229.  
  230. struct acpi_pnp_type {
  231.         u32 hardware_id:1;
  232.         u32 bus_address:1;
  233.         u32 platform_id:1;
  234.         u32 reserved:29;
  235. };
  236.  
  237. struct acpi_device_pnp {
  238.         acpi_bus_id bus_id;             /* Object name */
  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. };
  283.  
  284. /* Performance Management */
  285.  
  286. struct acpi_device_perf_flags {
  287.         u8 reserved:8;
  288. };
  289.  
  290. struct acpi_device_perf_state {
  291.         struct {
  292.                 u8 valid:1;
  293.                 u8 reserved:7;
  294.         } flags;
  295.         u8 power;               /* % Power (compared to P0) */
  296.         u8 performance;         /* % Performance (    "   ) */
  297.         int latency;            /* Px->P0 time (microseconds) */
  298. };
  299.  
  300. struct acpi_device_perf {
  301.         int state;
  302.         struct acpi_device_perf_flags flags;
  303.         int state_count;
  304.         struct acpi_device_perf_state *states;
  305. };
  306.  
  307. /* Wakeup Management */
  308. struct acpi_device_wakeup_flags {
  309.         u8 valid:1;             /* Can successfully enable wakeup? */
  310.         u8 run_wake:1;          /* Run-Wake GPE devices */
  311.         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
  312.         u8 enabled:1;           /* Enabled for wakeup */
  313. };
  314.  
  315. struct acpi_device_wakeup_context {
  316.         struct work_struct work;
  317.         struct device *dev;
  318. };
  319.  
  320. struct acpi_device_wakeup {
  321.         acpi_handle gpe_device;
  322.         u64 gpe_number;
  323.         u64 sleep_state;
  324.         struct list_head resources;
  325.         struct acpi_device_wakeup_flags flags;
  326.         struct acpi_device_wakeup_context context;
  327.         struct wakeup_source *ws;
  328.         int prepare_count;
  329. };
  330.  
  331. struct acpi_device_physical_node {
  332.         unsigned int node_id;
  333.         struct list_head node;
  334.         struct device *dev;
  335.         bool put_online:1;
  336. };
  337.  
  338. /* ACPI Device Specific Data (_DSD) */
  339. struct acpi_device_data {
  340.         const union acpi_object *pointer;
  341.         const union acpi_object *properties;
  342.         const union acpi_object *of_compatible;
  343.         struct list_head subnodes;
  344. };
  345.  
  346. struct acpi_gpio_mapping;
  347.  
  348. /* Device */
  349. struct acpi_device {
  350.         int device_type;
  351.         acpi_handle handle;             /* no handle for fixed hardware */
  352.         struct fwnode_handle fwnode;
  353.         struct acpi_device *parent;
  354.         struct list_head children;
  355.         struct list_head node;
  356.         struct list_head wakeup_list;
  357.         struct list_head del_list;
  358.         struct acpi_device_status status;
  359.         struct acpi_device_flags flags;
  360.         struct acpi_device_pnp pnp;
  361.         struct acpi_device_power power;
  362.         struct acpi_device_wakeup wakeup;
  363.         struct acpi_device_perf performance;
  364.         struct acpi_device_dir dir;
  365.         struct acpi_device_data data;
  366.         struct acpi_scan_handler *handler;
  367.         struct acpi_hotplug_context *hp;
  368.         struct acpi_driver *driver;
  369.         const struct acpi_gpio_mapping *driver_gpios;
  370.         void *driver_data;
  371.         struct device dev;
  372.         unsigned int physical_node_count;
  373.         unsigned int dep_unmet;
  374.         struct list_head physical_node_list;
  375.         struct mutex physical_node_lock;
  376.         void (*remove)(struct acpi_device *);
  377. };
  378.  
  379. /* Non-device subnode */
  380. struct acpi_data_node {
  381.         const char *name;
  382.         acpi_handle handle;
  383.         struct fwnode_handle fwnode;
  384.         struct acpi_device_data data;
  385.         struct list_head sibling;
  386.         struct kobject kobj;
  387.         struct completion kobj_done;
  388. };
  389.  
  390. static inline bool is_acpi_node(struct fwnode_handle *fwnode)
  391. {
  392.         return fwnode && (fwnode->type == FWNODE_ACPI
  393.                 || fwnode->type == FWNODE_ACPI_DATA);
  394. }
  395.  
  396. static inline bool is_acpi_device_node(struct fwnode_handle *fwnode)
  397. {
  398.         return fwnode && fwnode->type == FWNODE_ACPI;
  399. }
  400.  
  401. static inline struct acpi_device *to_acpi_device_node(struct fwnode_handle *fwnode)
  402. {
  403.         return is_acpi_device_node(fwnode) ?
  404.                 container_of(fwnode, struct acpi_device, fwnode) : NULL;
  405. }
  406.  
  407. static inline bool is_acpi_data_node(struct fwnode_handle *fwnode)
  408. {
  409.         return fwnode && fwnode->type == FWNODE_ACPI_DATA;
  410. }
  411.  
  412. static inline struct acpi_data_node *to_acpi_data_node(struct fwnode_handle *fwnode)
  413. {
  414.         return is_acpi_data_node(fwnode) ?
  415.                 container_of(fwnode, struct acpi_data_node, fwnode) : NULL;
  416. }
  417.  
  418. static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
  419. {
  420.         return &adev->fwnode;
  421. }
  422.  
  423. static inline void *acpi_driver_data(struct acpi_device *d)
  424. {
  425.         return d->driver_data;
  426. }
  427.  
  428. #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
  429. #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
  430.  
  431. static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
  432. {
  433.         *((u32 *)&adev->status) = sta;
  434. }
  435.  
  436. static inline void acpi_set_hp_context(struct acpi_device *adev,
  437.                                        struct acpi_hotplug_context *hp)
  438. {
  439.         hp->self = adev;
  440.         adev->hp = hp;
  441. }
  442.  
  443. void acpi_initialize_hp_context(struct acpi_device *adev,
  444.                                 struct acpi_hotplug_context *hp,
  445.                                 int (*notify)(struct acpi_device *, u32),
  446.                                 void (*uevent)(struct acpi_device *, u32));
  447.  
  448. /* acpi_device.dev.bus == &acpi_bus_type */
  449. extern struct bus_type acpi_bus_type;
  450.  
  451. /*
  452.  * Events
  453.  * ------
  454.  */
  455.  
  456. struct acpi_bus_event {
  457.         struct list_head node;
  458.         acpi_device_class device_class;
  459.         acpi_bus_id bus_id;
  460.         u32 type;
  461.         u32 data;
  462. };
  463.  
  464. extern struct kobject *acpi_kobj;
  465. extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
  466. void acpi_bus_private_data_handler(acpi_handle, void *);
  467. int acpi_bus_get_private_data(acpi_handle, void **);
  468. int acpi_bus_attach_private_data(acpi_handle, void *);
  469. void acpi_bus_detach_private_data(acpi_handle);
  470. extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
  471.  
  472. /*
  473.  * External Functions
  474.  */
  475.  
  476. int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
  477. struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
  478. void acpi_bus_put_acpi_device(struct acpi_device *adev);
  479. acpi_status acpi_bus_get_status_handle(acpi_handle handle,
  480.                                        unsigned long long *sta);
  481. int acpi_bus_get_status(struct acpi_device *device);
  482.  
  483. int acpi_bus_set_power(acpi_handle handle, int state);
  484. const char *acpi_power_state_string(int state);
  485. int acpi_device_get_power(struct acpi_device *device, int *state);
  486. int acpi_device_set_power(struct acpi_device *device, int state);
  487. int acpi_bus_init_power(struct acpi_device *device);
  488. int acpi_device_fix_up_power(struct acpi_device *device);
  489. int acpi_bus_update_power(acpi_handle handle, int *state_p);
  490. int acpi_device_update_power(struct acpi_device *device, int *state_p);
  491. bool acpi_bus_power_manageable(acpi_handle handle);
  492.  
  493. #ifdef CONFIG_PM
  494. bool acpi_bus_can_wakeup(acpi_handle handle);
  495. #else
  496. static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
  497. #endif
  498.  
  499. void acpi_scan_lock_acquire(void);
  500. void acpi_scan_lock_release(void);
  501. void acpi_lock_hp_context(void);
  502. void acpi_unlock_hp_context(void);
  503. int acpi_scan_add_handler(struct acpi_scan_handler *handler);
  504. int acpi_bus_register_driver(struct acpi_driver *driver);
  505. void acpi_bus_unregister_driver(struct acpi_driver *driver);
  506. int acpi_bus_scan(acpi_handle handle);
  507. void acpi_bus_trim(struct acpi_device *start);
  508. acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
  509. int acpi_match_device_ids(struct acpi_device *device,
  510.                           const struct acpi_device_id *ids);
  511. int acpi_create_dir(struct acpi_device *);
  512. void acpi_remove_dir(struct acpi_device *);
  513.  
  514. static inline bool acpi_device_enumerated(struct acpi_device *adev)
  515. {
  516.         return adev && adev->flags.initialized && adev->flags.visited;
  517. }
  518.  
  519. /**
  520.  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
  521.  * @__acpi_driver: acpi_driver struct
  522.  *
  523.  * Helper macro for ACPI drivers which do not do anything special in module
  524.  * init/exit. This eliminates a lot of boilerplate. Each module may only
  525.  * use this macro once, and calling it replaces module_init() and module_exit()
  526.  */
  527. #define module_acpi_driver(__acpi_driver) \
  528.         module_driver(__acpi_driver, acpi_bus_register_driver, \
  529.                       acpi_bus_unregister_driver)
  530.  
  531. /*
  532.  * Bind physical devices with ACPI devices
  533.  */
  534. struct acpi_bus_type {
  535.         struct list_head list;
  536.         const char *name;
  537.         bool (*match)(struct device *dev);
  538.         struct acpi_device * (*find_companion)(struct device *);
  539.         void (*setup)(struct device *);
  540.         void (*cleanup)(struct device *);
  541. };
  542. int register_acpi_bus_type(struct acpi_bus_type *);
  543. int unregister_acpi_bus_type(struct acpi_bus_type *);
  544. int acpi_bind_one(struct device *dev, struct acpi_device *adev);
  545. int acpi_unbind_one(struct device *dev);
  546.  
  547. struct acpi_pci_root {
  548.         struct acpi_device * device;
  549.         struct pci_bus *bus;
  550.         u16 segment;
  551.         struct resource secondary;      /* downstream bus range */
  552.  
  553.         u32 osc_support_set;    /* _OSC state of support bits */
  554.         u32 osc_control_set;    /* _OSC state of control bits */
  555.         phys_addr_t mcfg_addr;
  556. };
  557.  
  558. /* helper */
  559.  
  560. bool acpi_dma_supported(struct acpi_device *adev);
  561. enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
  562.  
  563. struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
  564.                                            u64 address, bool check_children);
  565. int acpi_is_root_bridge(acpi_handle);
  566. struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
  567.  
  568. int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
  569. int acpi_disable_wakeup_device_power(struct acpi_device *dev);
  570.  
  571. #ifdef CONFIG_PM
  572. acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
  573.                                  void (*work_func)(struct work_struct *work));
  574. acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
  575. int acpi_pm_device_sleep_state(struct device *, int *, int);
  576. int acpi_pm_device_run_wake(struct device *, bool);
  577. #else
  578. static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
  579.                                                struct device *dev,
  580.                                                void (*work_func)(struct work_struct *work))
  581. {
  582.         return AE_SUPPORT;
  583. }
  584. static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
  585. {
  586.         return AE_SUPPORT;
  587. }
  588. static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
  589. {
  590.         if (p)
  591.                 *p = ACPI_STATE_D0;
  592.  
  593.         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
  594.                 m : ACPI_STATE_D0;
  595. }
  596. static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
  597. {
  598.         return -ENODEV;
  599. }
  600. #endif
  601.  
  602. #ifdef CONFIG_PM_SLEEP
  603. int acpi_pm_device_sleep_wake(struct device *, bool);
  604. #else
  605. static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
  606. {
  607.         return -ENODEV;
  608. }
  609. #endif
  610.  
  611. #ifdef CONFIG_ACPI_SLEEP
  612. u32 acpi_target_system_state(void);
  613. #else
  614. static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
  615. #endif
  616.  
  617. static inline bool acpi_device_power_manageable(struct acpi_device *adev)
  618. {
  619.         return adev->flags.power_manageable;
  620. }
  621.  
  622. static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
  623. {
  624.         return adev->wakeup.flags.valid;
  625. }
  626.  
  627. static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
  628. {
  629.         return adev->power.states[ACPI_STATE_D3_COLD].flags.valid;
  630. }
  631.  
  632. #else   /* CONFIG_ACPI */
  633.  
  634. static inline int register_acpi_bus_type(void *bus) { return 0; }
  635. static inline int unregister_acpi_bus_type(void *bus) { return 0; }
  636.  
  637. #endif                          /* CONFIG_ACPI */
  638.  
  639. #endif /*__ACPI_BUS_H__*/
  640.