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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. bool acpi_dev_present(const char *hid);
  91.  
  92. #ifdef CONFIG_ACPI
  93.  
  94. #define ACPI_BUS_FILE_ROOT      "acpi"
  95.  
  96. enum acpi_bus_device_type {
  97.         ACPI_BUS_TYPE_DEVICE = 0,
  98.         ACPI_BUS_TYPE_POWER,
  99.         ACPI_BUS_TYPE_PROCESSOR,
  100.         ACPI_BUS_TYPE_THERMAL,
  101.         ACPI_BUS_TYPE_POWER_BUTTON,
  102.         ACPI_BUS_TYPE_SLEEP_BUTTON,
  103.         ACPI_BUS_DEVICE_TYPE_COUNT
  104. };
  105.  
  106. struct acpi_driver;
  107. struct acpi_device;
  108.  
  109. /*
  110.  * ACPI Scan Handler
  111.  * -----------------
  112.  */
  113.  
  114. struct acpi_hotplug_profile {
  115.         struct kobject kobj;
  116.         int (*scan_dependent)(struct acpi_device *adev);
  117.         void (*notify_online)(struct acpi_device *adev);
  118.         bool enabled:1;
  119.         bool demand_offline:1;
  120. };
  121.  
  122. static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
  123.                                                 struct kobject *kobj)
  124. {
  125.         return container_of(kobj, struct acpi_hotplug_profile, kobj);
  126. }
  127.  
  128. struct acpi_scan_handler {
  129.         const struct acpi_device_id *ids;
  130.         struct list_head list_node;
  131.         bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
  132.         int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
  133.         void (*detach)(struct acpi_device *dev);
  134.         void (*bind)(struct device *phys_dev);
  135.         void (*unbind)(struct device *phys_dev);
  136.         struct acpi_hotplug_profile hotplug;
  137. };
  138.  
  139. /*
  140.  * ACPI Hotplug Context
  141.  * --------------------
  142.  */
  143.  
  144. struct acpi_hotplug_context {
  145.         struct acpi_device *self;
  146.         int (*notify)(struct acpi_device *, u32);
  147.         void (*uevent)(struct acpi_device *, u32);
  148.         void (*fixup)(struct acpi_device *);
  149. };
  150.  
  151. /*
  152.  * ACPI Driver
  153.  * -----------
  154.  */
  155.  
  156. typedef int (*acpi_op_add) (struct acpi_device * device);
  157. typedef int (*acpi_op_remove) (struct acpi_device * device);
  158. typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
  159.  
  160. struct acpi_device_ops {
  161.         acpi_op_add add;
  162.         acpi_op_remove remove;
  163.         acpi_op_notify notify;
  164. };
  165.  
  166. #define ACPI_DRIVER_ALL_NOTIFY_EVENTS   0x1     /* system AND device events */
  167.  
  168. struct acpi_driver {
  169.         char name[80];
  170.         char class[80];
  171.         const struct acpi_device_id *ids; /* Supported Hardware IDs */
  172.         unsigned int flags;
  173.         struct acpi_device_ops ops;
  174.         struct device_driver drv;
  175.         struct module *owner;
  176. };
  177.  
  178. /*
  179.  * ACPI Device
  180.  * -----------
  181.  */
  182.  
  183. /* Status (_STA) */
  184.  
  185. struct acpi_device_status {
  186.         u32 present:1;
  187.         u32 enabled:1;
  188.         u32 show_in_ui:1;
  189.         u32 functional:1;
  190.         u32 battery_present:1;
  191.         u32 reserved:27;
  192. };
  193.  
  194. /* Flags */
  195.  
  196. struct acpi_device_flags {
  197.         u32 dynamic_status:1;
  198.         u32 removable:1;
  199.         u32 ejectable:1;
  200.         u32 power_manageable:1;
  201.         u32 match_driver:1;
  202.         u32 initialized:1;
  203.         u32 visited:1;
  204.         u32 hotplug_notify:1;
  205.         u32 is_dock_station:1;
  206.         u32 of_compatible_ok:1;
  207.         u32 coherent_dma:1;
  208.         u32 cca_seen:1;
  209.         u32 reserved:20;
  210. };
  211.  
  212. /* File System */
  213.  
  214. struct acpi_device_dir {
  215.         struct proc_dir_entry *entry;
  216. };
  217.  
  218. #define acpi_device_dir(d)      ((d)->dir.entry)
  219.  
  220. /* Plug and Play */
  221.  
  222. typedef char acpi_bus_id[8];
  223. typedef unsigned long acpi_bus_address;
  224. typedef char acpi_device_name[40];
  225. typedef char acpi_device_class[20];
  226.  
  227. struct acpi_hardware_id {
  228.         struct list_head list;
  229.         const char *id;
  230. };
  231.  
  232. struct acpi_pnp_type {
  233.         u32 hardware_id:1;
  234.         u32 bus_address:1;
  235.         u32 platform_id:1;
  236.         u32 reserved:29;
  237. };
  238.  
  239. struct acpi_device_pnp {
  240.         acpi_bus_id bus_id;             /* Object name */
  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 */
  248. };
  249.  
  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)
  256.  
  257. /* Power Management */
  258.  
  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? */
  266.         u32 reserved:26;
  267. };
  268.  
  269. struct acpi_device_power_state {
  270.         struct {
  271.                 u8 valid:1;
  272.                 u8 explicit_set:1;      /* _PSx present? */
  273.                 u8 reserved:6;
  274.         } flags;
  275.         int power;              /* % Power (compared to D0) */
  276.         int latency;            /* Dx->D0 time (microseconds) */
  277.         struct list_head resources;     /* Power resources referenced */
  278. };
  279.  
  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. };
  285.  
  286. /* Performance Management */
  287.  
  288. struct acpi_device_perf_flags {
  289.         u8 reserved:8;
  290. };
  291.  
  292. struct acpi_device_perf_state {
  293.         struct {
  294.                 u8 valid:1;
  295.                 u8 reserved:7;
  296.         } flags;
  297.         u8 power;               /* % Power (compared to P0) */
  298.         u8 performance;         /* % Performance (    "   ) */
  299.         int latency;            /* Px->P0 time (microseconds) */
  300. };
  301.  
  302. struct acpi_device_perf {
  303.         int state;
  304.         struct acpi_device_perf_flags flags;
  305.         int state_count;
  306.         struct acpi_device_perf_state *states;
  307. };
  308.  
  309. /* Wakeup Management */
  310. struct acpi_device_wakeup_flags {
  311.         u8 valid:1;             /* Can successfully enable wakeup? */
  312.         u8 run_wake:1;          /* Run-Wake GPE devices */
  313.         u8 notifier_present:1;  /* Wake-up notify handler has been installed */
  314.         u8 enabled:1;           /* Enabled for wakeup */
  315. };
  316.  
  317. struct acpi_device_wakeup_context {
  318.         struct work_struct work;
  319.         struct device *dev;
  320. };
  321.  
  322. struct acpi_device_wakeup {
  323.         acpi_handle gpe_device;
  324.         u64 gpe_number;
  325.         u64 sleep_state;
  326.         struct list_head resources;
  327.         struct acpi_device_wakeup_flags flags;
  328.         struct acpi_device_wakeup_context context;
  329.         struct wakeup_source *ws;
  330.         int prepare_count;
  331. };
  332.  
  333. struct acpi_device_physical_node {
  334.         unsigned int node_id;
  335.         struct list_head node;
  336.         struct device *dev;
  337.         bool put_online:1;
  338. };
  339.  
  340. /* ACPI Device Specific Data (_DSD) */
  341. struct acpi_device_data {
  342.         const union acpi_object *pointer;
  343.         const union acpi_object *properties;
  344.         const union acpi_object *of_compatible;
  345.         struct list_head subnodes;
  346. };
  347.  
  348. struct acpi_gpio_mapping;
  349.  
  350. /* Device */
  351. struct acpi_device {
  352.         int device_type;
  353.         acpi_handle handle;             /* no handle for fixed hardware */
  354.         struct fwnode_handle fwnode;
  355.         struct acpi_device *parent;
  356.         struct list_head children;
  357.         struct list_head node;
  358.         struct list_head wakeup_list;
  359.         struct list_head del_list;
  360.         struct acpi_device_status status;
  361.         struct acpi_device_flags flags;
  362.         struct acpi_device_pnp pnp;
  363.         struct acpi_device_power power;
  364.         struct acpi_device_wakeup wakeup;
  365.         struct acpi_device_perf performance;
  366.         struct acpi_device_dir dir;
  367.         struct acpi_device_data data;
  368.         struct acpi_scan_handler *handler;
  369.         struct acpi_hotplug_context *hp;
  370.         struct acpi_driver *driver;
  371.         const struct acpi_gpio_mapping *driver_gpios;
  372.         void *driver_data;
  373.         struct device dev;
  374.         unsigned int physical_node_count;
  375.         unsigned int dep_unmet;
  376.         struct list_head physical_node_list;
  377.         struct mutex physical_node_lock;
  378.         void (*remove)(struct acpi_device *);
  379. };
  380.  
  381. /* Non-device subnode */
  382. struct acpi_data_node {
  383.         const char *name;
  384.         acpi_handle handle;
  385.         struct fwnode_handle fwnode;
  386.         struct acpi_device_data data;
  387.         struct list_head sibling;
  388.         struct kobject kobj;
  389.         struct completion kobj_done;
  390. };
  391.  
  392. static inline bool is_acpi_node(struct fwnode_handle *fwnode)
  393. {
  394.         return !IS_ERR_OR_NULL(fwnode) && (fwnode->type == FWNODE_ACPI
  395.                 || fwnode->type == FWNODE_ACPI_DATA);
  396. }
  397.  
  398. static inline bool is_acpi_device_node(struct fwnode_handle *fwnode)
  399. {
  400.         return !IS_ERR_OR_NULL(fwnode) && fwnode->type == FWNODE_ACPI;
  401. }
  402.  
  403. static inline struct acpi_device *to_acpi_device_node(struct fwnode_handle *fwnode)
  404. {
  405.         return is_acpi_device_node(fwnode) ?
  406.                 container_of(fwnode, struct acpi_device, fwnode) : NULL;
  407. }
  408.  
  409. static inline bool is_acpi_data_node(struct fwnode_handle *fwnode)
  410. {
  411.         return fwnode && fwnode->type == FWNODE_ACPI_DATA;
  412. }
  413.  
  414. static inline struct acpi_data_node *to_acpi_data_node(struct fwnode_handle *fwnode)
  415. {
  416.         return is_acpi_data_node(fwnode) ?
  417.                 container_of(fwnode, struct acpi_data_node, fwnode) : NULL;
  418. }
  419.  
  420. static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
  421. {
  422.         return &adev->fwnode;
  423. }
  424.  
  425. static inline void *acpi_driver_data(struct acpi_device *d)
  426. {
  427.         return d->driver_data;
  428. }
  429.  
  430. #define to_acpi_device(d)       container_of(d, struct acpi_device, dev)
  431. #define to_acpi_driver(d)       container_of(d, struct acpi_driver, drv)
  432.  
  433. static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
  434. {
  435.         *((u32 *)&adev->status) = sta;
  436. }
  437.  
  438. static inline void acpi_set_hp_context(struct acpi_device *adev,
  439.                                        struct acpi_hotplug_context *hp)
  440. {
  441.         hp->self = adev;
  442.         adev->hp = hp;
  443. }
  444.  
  445. void acpi_initialize_hp_context(struct acpi_device *adev,
  446.                                 struct acpi_hotplug_context *hp,
  447.                                 int (*notify)(struct acpi_device *, u32),
  448.                                 void (*uevent)(struct acpi_device *, u32));
  449.  
  450. /* acpi_device.dev.bus == &acpi_bus_type */
  451. extern struct bus_type acpi_bus_type;
  452.  
  453. /*
  454.  * Events
  455.  * ------
  456.  */
  457.  
  458. struct acpi_bus_event {
  459.         struct list_head node;
  460.         acpi_device_class device_class;
  461.         acpi_bus_id bus_id;
  462.         u32 type;
  463.         u32 data;
  464. };
  465.  
  466. extern struct kobject *acpi_kobj;
  467. extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
  468. void acpi_bus_private_data_handler(acpi_handle, void *);
  469. int acpi_bus_get_private_data(acpi_handle, void **);
  470. int acpi_bus_attach_private_data(acpi_handle, void *);
  471. void acpi_bus_detach_private_data(acpi_handle);
  472. extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
  473.  
  474. /*
  475.  * External Functions
  476.  */
  477.  
  478. int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
  479. struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
  480. void acpi_bus_put_acpi_device(struct acpi_device *adev);
  481. acpi_status acpi_bus_get_status_handle(acpi_handle handle,
  482.                                        unsigned long long *sta);
  483. int acpi_bus_get_status(struct acpi_device *device);
  484.  
  485. int acpi_bus_set_power(acpi_handle handle, int state);
  486. const char *acpi_power_state_string(int state);
  487. int acpi_device_get_power(struct acpi_device *device, int *state);
  488. int acpi_device_set_power(struct acpi_device *device, int state);
  489. int acpi_bus_init_power(struct acpi_device *device);
  490. int acpi_device_fix_up_power(struct acpi_device *device);
  491. int acpi_bus_update_power(acpi_handle handle, int *state_p);
  492. int acpi_device_update_power(struct acpi_device *device, int *state_p);
  493. bool acpi_bus_power_manageable(acpi_handle handle);
  494.  
  495. #ifdef CONFIG_PM
  496. bool acpi_bus_can_wakeup(acpi_handle handle);
  497. #else
  498. static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
  499. #endif
  500.  
  501. void acpi_scan_lock_acquire(void);
  502. void acpi_scan_lock_release(void);
  503. void acpi_lock_hp_context(void);
  504. void acpi_unlock_hp_context(void);
  505. int acpi_scan_add_handler(struct acpi_scan_handler *handler);
  506. int acpi_bus_register_driver(struct acpi_driver *driver);
  507. void acpi_bus_unregister_driver(struct acpi_driver *driver);
  508. int acpi_bus_scan(acpi_handle handle);
  509. void acpi_bus_trim(struct acpi_device *start);
  510. acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
  511. int acpi_match_device_ids(struct acpi_device *device,
  512.                           const struct acpi_device_id *ids);
  513. int acpi_create_dir(struct acpi_device *);
  514. void acpi_remove_dir(struct acpi_device *);
  515.  
  516. static inline bool acpi_device_enumerated(struct acpi_device *adev)
  517. {
  518.         return adev && adev->flags.initialized && adev->flags.visited;
  519. }
  520.  
  521. /**
  522.  * module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
  523.  * @__acpi_driver: acpi_driver struct
  524.  *
  525.  * Helper macro for ACPI drivers which do not do anything special in module
  526.  * init/exit. This eliminates a lot of boilerplate. Each module may only
  527.  * use this macro once, and calling it replaces module_init() and module_exit()
  528.  */
  529. #define module_acpi_driver(__acpi_driver) \
  530.         module_driver(__acpi_driver, acpi_bus_register_driver, \
  531.                       acpi_bus_unregister_driver)
  532.  
  533. /*
  534.  * Bind physical devices with ACPI devices
  535.  */
  536. struct acpi_bus_type {
  537.         struct list_head list;
  538.         const char *name;
  539.         bool (*match)(struct device *dev);
  540.         struct acpi_device * (*find_companion)(struct device *);
  541.         void (*setup)(struct device *);
  542.         void (*cleanup)(struct device *);
  543. };
  544. int register_acpi_bus_type(struct acpi_bus_type *);
  545. int unregister_acpi_bus_type(struct acpi_bus_type *);
  546. int acpi_bind_one(struct device *dev, struct acpi_device *adev);
  547. int acpi_unbind_one(struct device *dev);
  548.  
  549. struct acpi_pci_root {
  550.         struct acpi_device * device;
  551.         struct pci_bus *bus;
  552.         u16 segment;
  553.         struct resource secondary;      /* downstream bus range */
  554.  
  555.         u32 osc_support_set;    /* _OSC state of support bits */
  556.         u32 osc_control_set;    /* _OSC state of control bits */
  557.         phys_addr_t mcfg_addr;
  558. };
  559.  
  560. /* helper */
  561.  
  562. bool acpi_dma_supported(struct acpi_device *adev);
  563. enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
  564.  
  565. struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
  566.                                            u64 address, bool check_children);
  567. int acpi_is_root_bridge(acpi_handle);
  568. struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
  569.  
  570. int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
  571. int acpi_disable_wakeup_device_power(struct acpi_device *dev);
  572.  
  573. #ifdef CONFIG_PM
  574. acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
  575.                                  void (*work_func)(struct work_struct *work));
  576. acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
  577. int acpi_pm_device_sleep_state(struct device *, int *, int);
  578. int acpi_pm_device_run_wake(struct device *, bool);
  579. #else
  580. static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
  581.                                                struct device *dev,
  582.                                                void (*work_func)(struct work_struct *work))
  583. {
  584.         return AE_SUPPORT;
  585. }
  586. static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
  587. {
  588.         return AE_SUPPORT;
  589. }
  590. static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
  591. {
  592.         if (p)
  593.                 *p = ACPI_STATE_D0;
  594.  
  595.         return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
  596.                 m : ACPI_STATE_D0;
  597. }
  598. static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
  599. {
  600.         return -ENODEV;
  601. }
  602. #endif
  603.  
  604. #ifdef CONFIG_PM_SLEEP
  605. int acpi_pm_device_sleep_wake(struct device *, bool);
  606. #else
  607. static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
  608. {
  609.         return -ENODEV;
  610. }
  611. #endif
  612.  
  613. #ifdef CONFIG_ACPI_SLEEP
  614. u32 acpi_target_system_state(void);
  615. #else
  616. static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
  617. #endif
  618.  
  619. static inline bool acpi_device_power_manageable(struct acpi_device *adev)
  620. {
  621.         return adev->flags.power_manageable;
  622. }
  623.  
  624. static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
  625. {
  626.         return adev->wakeup.flags.valid;
  627. }
  628.  
  629. static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
  630. {
  631.         return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
  632.                 ((acpi_gbl_FADT.header.revision < 6) &&
  633.                 adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set);
  634. }
  635.  
  636. #else   /* CONFIG_ACPI */
  637.  
  638. static inline int register_acpi_bus_type(void *bus) { return 0; }
  639. static inline int unregister_acpi_bus_type(void *bus) { return 0; }
  640.  
  641. #endif                          /* CONFIG_ACPI */
  642.  
  643. #endif /*__ACPI_BUS_H__*/
  644.