include/acpi/acpi_bus.h - kernel/msm-4.19 - Gitiles

 /*
  *  acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
  *
  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or (at
  *  your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful, but
  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  */

 #ifndef __ACPI_BUS_H__
 #define __ACPI_BUS_H__

 #include <linux/device.h>

 #include <acpi/acpi.h>

 #define PREFIX			"ACPI: "

 /* TBD: Make dynamic */
 #define ACPI_MAX_HANDLES	10
 struct acpi_handle_list {
 	u32 count;
 	acpi_handle handles[ACPI_MAX_HANDLES];
 };

 /* acpi_utils.h */
 acpi_status
 acpi_extract_package(union acpi_object *package,
 		     struct acpi_buffer *format, struct acpi_buffer *buffer);
 acpi_status
 acpi_evaluate_integer(acpi_handle handle,
 		      acpi_string pathname,
 		      struct acpi_object_list *arguments, unsigned long long *data);
 acpi_status
 acpi_evaluate_reference(acpi_handle handle,
 			acpi_string pathname,
 			struct acpi_object_list *arguments,
 			struct acpi_handle_list *list);

 #ifdef CONFIG_ACPI

 #include <linux/proc_fs.h>

 #define ACPI_BUS_FILE_ROOT	"acpi"
 extern struct proc_dir_entry *acpi_root_dir;

 enum acpi_bus_removal_type {
 	ACPI_BUS_REMOVAL_NORMAL = 0,
 	ACPI_BUS_REMOVAL_EJECT,
 	ACPI_BUS_REMOVAL_SUPRISE,
 	ACPI_BUS_REMOVAL_TYPE_COUNT
 };

 enum acpi_bus_device_type {
 	ACPI_BUS_TYPE_DEVICE = 0,
 	ACPI_BUS_TYPE_POWER,
 	ACPI_BUS_TYPE_PROCESSOR,
 	ACPI_BUS_TYPE_THERMAL,
 	ACPI_BUS_TYPE_SYSTEM,
 	ACPI_BUS_TYPE_POWER_BUTTON,
 	ACPI_BUS_TYPE_SLEEP_BUTTON,
 	ACPI_BUS_DEVICE_TYPE_COUNT
 };

 struct acpi_driver;
 struct acpi_device;

 /*
  * ACPI Driver
  * -----------
  */

 typedef int (*acpi_op_add) (struct acpi_device * device);
 typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
 typedef int (*acpi_op_start) (struct acpi_device * device);
 typedef int (*acpi_op_suspend) (struct acpi_device * device,
 				pm_message_t state);
 typedef int (*acpi_op_resume) (struct acpi_device * device);
 typedef int (*acpi_op_bind) (struct acpi_device * device);
 typedef int (*acpi_op_unbind) (struct acpi_device * device);
 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);

 struct acpi_bus_ops {
 	u32 acpi_op_add:1;
 	u32 acpi_op_start:1;
 };

 struct acpi_device_ops {
 	acpi_op_add add;
 	acpi_op_remove remove;
 	acpi_op_start start;
 	acpi_op_suspend suspend;
 	acpi_op_resume resume;
 	acpi_op_bind bind;
 	acpi_op_unbind unbind;
 	acpi_op_notify notify;
 };

 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS	0x1	/* system AND device events */

 struct acpi_driver {
 	char name[80];
 	char class[80];
 	const struct acpi_device_id *ids; /* Supported Hardware IDs */
 	unsigned int flags;
 	struct acpi_device_ops ops;
 	struct device_driver drv;
 	struct module *owner;
 };

 /*
  * ACPI Device
  * -----------
  */

 /* Status (_STA) */

 struct acpi_device_status {
 	u32 present:1;
 	u32 enabled:1;
 	u32 show_in_ui:1;
 	u32 functional:1;
 	u32 battery_present:1;
 	u32 reserved:27;
 };

 /* Flags */

 struct acpi_device_flags {
 	u32 dynamic_status:1;
 	u32 hardware_id:1;
 	u32 compatible_ids:1;
 	u32 bus_address:1;
 	u32 unique_id:1;
 	u32 removable:1;
 	u32 ejectable:1;
 	u32 lockable:1;
 	u32 suprise_removal_ok:1;
 	u32 power_manageable:1;
 	u32 performance_manageable:1;
 	u32 wake_capable:1;	/* Wakeup(_PRW) supported? */
 	u32 force_power_state:1;
 	u32 reserved:19;
 };

 /* File System */

 struct acpi_device_dir {
 	struct proc_dir_entry *entry;
 };

 #define acpi_device_dir(d)	((d)->dir.entry)

 /* Plug and Play */

 typedef char acpi_bus_id[8];
 typedef unsigned long acpi_bus_address;
 typedef char acpi_hardware_id[15];
 typedef char acpi_unique_id[9];
 typedef char acpi_device_name[40];
 typedef char acpi_device_class[20];

 struct acpi_device_pnp {
 	acpi_bus_id bus_id;	/* Object name */
 	acpi_bus_address bus_address;	/* _ADR */
 	acpi_hardware_id hardware_id;	/* _HID */
 	struct acpi_compatible_id_list *cid_list;	/* _CIDs */
 	acpi_unique_id unique_id;	/* _UID */
 	acpi_device_name device_name;	/* Driver-determined */
 	acpi_device_class device_class;	/*        "          */
 };

 #define acpi_device_bid(d)	((d)->pnp.bus_id)
 #define acpi_device_adr(d)	((d)->pnp.bus_address)
 #define acpi_device_hid(d)	((d)->pnp.hardware_id)
 #define acpi_device_uid(d)	((d)->pnp.unique_id)
 #define acpi_device_name(d)	((d)->pnp.device_name)
 #define acpi_device_class(d)	((d)->pnp.device_class)

 /* Power Management */

 struct acpi_device_power_flags {
 	u32 explicit_get:1;	/* _PSC present? */
 	u32 power_resources:1;	/* Power resources */
 	u32 inrush_current:1;	/* Serialize Dx->D0 */
 	u32 power_removed:1;	/* Optimize Dx->D0 */
 	u32 reserved:28;
 };

 struct acpi_device_power_state {
 	struct {
 		u8 valid:1;
 		u8 explicit_set:1;	/* _PSx present? */
 		u8 reserved:6;
 	} flags;
 	int power;		/* % Power (compared to D0) */
 	int latency;		/* Dx->D0 time (microseconds) */
 	struct acpi_handle_list resources;	/* Power resources referenced */
 };

 struct acpi_device_power {
 	int state;		/* Current state */
 	struct acpi_device_power_flags flags;
 	struct acpi_device_power_state states[4];	/* Power states (D0-D3) */
 };

 /* Performance Management */

 struct acpi_device_perf_flags {
 	u8 reserved:8;
 };

 struct acpi_device_perf_state {
 	struct {
 		u8 valid:1;
 		u8 reserved:7;
 	} flags;
 	u8 power;		/* % Power (compared to P0) */
 	u8 performance;		/* % Performance (    "   ) */
 	int latency;		/* Px->P0 time (microseconds) */
 };

 struct acpi_device_perf {
 	int state;
 	struct acpi_device_perf_flags flags;
 	int state_count;
 	struct acpi_device_perf_state *states;
 };

 /* Wakeup Management */
 struct acpi_device_wakeup_flags {
 	u8 valid:1;		/* Can successfully enable wakeup? */
 	u8 prepared:1;		/* Has the wake-up capability been enabled? */
 	u8 run_wake:1;		/* Run-Wake GPE devices */
 };

 struct acpi_device_wakeup_state {
 	u8 enabled:1;
 };

 struct acpi_device_wakeup {
 	acpi_handle gpe_device;
 	acpi_integer gpe_number;
 	acpi_integer sleep_state;
 	struct acpi_handle_list resources;
 	struct acpi_device_wakeup_state state;
 	struct acpi_device_wakeup_flags flags;
 };

 /* Device */

 struct acpi_device {
 	acpi_handle handle;
 	struct acpi_device *parent;
 	struct list_head children;
 	struct list_head node;
 	struct list_head wakeup_list;
 	struct acpi_device_status status;
 	struct acpi_device_flags flags;
 	struct acpi_device_pnp pnp;
 	struct acpi_device_power power;
 	struct acpi_device_wakeup wakeup;
 	struct acpi_device_perf performance;
 	struct acpi_device_dir dir;
 	struct acpi_device_ops ops;
 	struct acpi_driver *driver;
 	void *driver_data;
 	struct device dev;
 	struct acpi_bus_ops bus_ops;	/* workaround for different code path for hotplug */
 	enum acpi_bus_removal_type removal_type;	/* indicate for different removal type */
 };

 static inline void *acpi_driver_data(struct acpi_device *d)
 {
 	return d->driver_data;
 }

 #define to_acpi_device(d)	container_of(d, struct acpi_device, dev)
 #define to_acpi_driver(d)	container_of(d, struct acpi_driver, drv)

 /* acpi_device.dev.bus == &acpi_bus_type */
 extern struct bus_type acpi_bus_type;

 /*
  * Events
  * ------
  */

 struct acpi_bus_event {
 	struct list_head node;
 	acpi_device_class device_class;
 	acpi_bus_id bus_id;
 	u32 type;
 	u32 data;
 };

 extern struct kobject *acpi_kobj;
 extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
 void acpi_bus_private_data_handler(acpi_handle, u32, void *);
 int acpi_bus_get_private_data(acpi_handle, void **);
 extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
 extern int register_acpi_notifier(struct notifier_block *);
 extern int unregister_acpi_notifier(struct notifier_block *);

 extern int register_acpi_bus_notifier(struct notifier_block *nb);
 extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
 /*
  * External Functions
  */

 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
 void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context);
 int acpi_bus_get_status(struct acpi_device *device);
 int acpi_bus_get_power(acpi_handle handle, int *state);
 int acpi_bus_set_power(acpi_handle handle, int state);
 bool acpi_bus_power_manageable(acpi_handle handle);
 bool acpi_bus_can_wakeup(acpi_handle handle);
 #ifdef CONFIG_ACPI_PROC_EVENT
 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
 int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
 int acpi_bus_receive_event(struct acpi_bus_event *event);
 #else
 static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
 	{ return 0; }
 #endif
 int acpi_bus_register_driver(struct acpi_driver *driver);
 void acpi_bus_unregister_driver(struct acpi_driver *driver);
 int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
 		 acpi_handle handle, int type);
 int acpi_bus_trim(struct acpi_device *start, int rmdevice);
 int acpi_bus_start(struct acpi_device *device);
 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 int acpi_match_device_ids(struct acpi_device *device,
 			  const struct acpi_device_id *ids);
 int acpi_create_dir(struct acpi_device *);
 void acpi_remove_dir(struct acpi_device *);

 /*
  * Bind physical devices with ACPI devices
  */
 #include <linux/device.h>
 struct acpi_bus_type {
 	struct list_head list;
 	struct bus_type *bus;
 	/* For general devices under the bus */
 	int (*find_device) (struct device *, acpi_handle *);
 	/* For bridges, such as PCI root bridge, IDE controller */
 	int (*find_bridge) (struct device *, acpi_handle *);
 };
 int register_acpi_bus_type(struct acpi_bus_type *);
 int unregister_acpi_bus_type(struct acpi_bus_type *);
 struct device *acpi_get_physical_device(acpi_handle);

 /* helper */
 acpi_handle acpi_get_child(acpi_handle, acpi_integer);
 int acpi_is_root_bridge(acpi_handle);
 acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
 #define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))

 #ifdef CONFIG_PM_SLEEP
 int acpi_pm_device_sleep_state(struct device *, int *);
 int acpi_pm_device_sleep_wake(struct device *, bool);
 #else /* !CONFIG_PM_SLEEP */
 static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
 {
 	if (p)
 		*p = ACPI_STATE_D0;
 	return ACPI_STATE_D3;
 }
 static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 {
 	return -ENODEV;
 }
 #endif /* !CONFIG_PM_SLEEP */

 #endif				/* CONFIG_ACPI */

 #endif /*__ACPI_BUS_H__*/
	/*
	* acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
	*
	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	*
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or (at
	* your option) any later version.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	*
	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	*/

	#ifndef __ACPI_BUS_H__
	#define __ACPI_BUS_H__

	#include <linux/device.h>

	#include <acpi/acpi.h>

	#define PREFIX "ACPI: "

	/* TBD: Make dynamic */
	#define ACPI_MAX_HANDLES 10
	struct acpi_handle_list {
	u32 count;
	acpi_handle handles[ACPI_MAX_HANDLES];
	};

	/* acpi_utils.h */
	acpi_status
	acpi_extract_package(union acpi_object *package,
	struct acpi_buffer format, struct acpi_buffer buffer);
	acpi_status
	acpi_evaluate_integer(acpi_handle handle,
	acpi_string pathname,
	struct acpi_object_list arguments, unsigned long long data);
	acpi_status
	acpi_evaluate_reference(acpi_handle handle,
	acpi_string pathname,
	struct acpi_object_list *arguments,
	struct acpi_handle_list *list);

	#ifdef CONFIG_ACPI

	#include <linux/proc_fs.h>

	#define ACPI_BUS_FILE_ROOT "acpi"
	extern struct proc_dir_entry *acpi_root_dir;

	enum acpi_bus_removal_type {
	ACPI_BUS_REMOVAL_NORMAL = 0,
	ACPI_BUS_REMOVAL_EJECT,
	ACPI_BUS_REMOVAL_SUPRISE,
	ACPI_BUS_REMOVAL_TYPE_COUNT
	};

	enum acpi_bus_device_type {
	ACPI_BUS_TYPE_DEVICE = 0,
	ACPI_BUS_TYPE_POWER,
	ACPI_BUS_TYPE_PROCESSOR,
	ACPI_BUS_TYPE_THERMAL,
	ACPI_BUS_TYPE_SYSTEM,
	ACPI_BUS_TYPE_POWER_BUTTON,
	ACPI_BUS_TYPE_SLEEP_BUTTON,
	ACPI_BUS_DEVICE_TYPE_COUNT
	};

	struct acpi_driver;
	struct acpi_device;

	/*
	* ACPI Driver
	* -----------
	*/

	typedef int (acpi_op_add) (struct acpi_device device);
	typedef int (acpi_op_remove) (struct acpi_device device, int type);
	typedef int (acpi_op_start) (struct acpi_device device);
	typedef int (acpi_op_suspend) (struct acpi_device device,
	pm_message_t state);
	typedef int (acpi_op_resume) (struct acpi_device device);
	typedef int (acpi_op_bind) (struct acpi_device device);
	typedef int (acpi_op_unbind) (struct acpi_device device);
	typedef void (acpi_op_notify) (struct acpi_device device, u32 event);

	struct acpi_bus_ops {
	u32 acpi_op_add:1;
	u32 acpi_op_start:1;
	};

	struct acpi_device_ops {
	acpi_op_add add;
	acpi_op_remove remove;
	acpi_op_start start;
	acpi_op_suspend suspend;
	acpi_op_resume resume;
	acpi_op_bind bind;
	acpi_op_unbind unbind;
	acpi_op_notify notify;
	};

	#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */

	struct acpi_driver {
	char name[80];
	char class[80];
	const struct acpi_device_id ids; / Supported Hardware IDs */
	unsigned int flags;
	struct acpi_device_ops ops;
	struct device_driver drv;
	struct module *owner;
	};

	/*
	* ACPI Device
	* -----------
	*/

	/* Status (_STA) */

	struct acpi_device_status {
	u32 present:1;
	u32 enabled:1;
	u32 show_in_ui:1;
	u32 functional:1;
	u32 battery_present:1;
	u32 reserved:27;
	};

	/* Flags */

	struct acpi_device_flags {
	u32 dynamic_status:1;
	u32 hardware_id:1;
	u32 compatible_ids:1;
	u32 bus_address:1;
	u32 unique_id:1;
	u32 removable:1;
	u32 ejectable:1;
	u32 lockable:1;
	u32 suprise_removal_ok:1;
	u32 power_manageable:1;
	u32 performance_manageable:1;
	u32 wake_capable:1; /* Wakeup(_PRW) supported? */
	u32 force_power_state:1;
	u32 reserved:19;
	};

	/* File System */

	struct acpi_device_dir {
	struct proc_dir_entry *entry;
	};

	#define acpi_device_dir(d) ((d)->dir.entry)

	/* Plug and Play */

	typedef char acpi_bus_id[8];
	typedef unsigned long acpi_bus_address;
	typedef char acpi_hardware_id[15];
	typedef char acpi_unique_id[9];
	typedef char acpi_device_name[40];
	typedef char acpi_device_class[20];

	struct acpi_device_pnp {
	acpi_bus_id bus_id; /* Object name */
	acpi_bus_address bus_address; /* _ADR */
	acpi_hardware_id hardware_id; /* _HID */
	struct acpi_compatible_id_list cid_list; / _CIDs */
	acpi_unique_id unique_id; /* _UID */
	acpi_device_name device_name; /* Driver-determined */
	acpi_device_class device_class; /* " */
	};

	#define acpi_device_bid(d) ((d)->pnp.bus_id)
	#define acpi_device_adr(d) ((d)->pnp.bus_address)
	#define acpi_device_hid(d) ((d)->pnp.hardware_id)
	#define acpi_device_uid(d) ((d)->pnp.unique_id)
	#define acpi_device_name(d) ((d)->pnp.device_name)
	#define acpi_device_class(d) ((d)->pnp.device_class)

	/* Power Management */

	struct acpi_device_power_flags {
	u32 explicit_get:1; /* _PSC present? */
	u32 power_resources:1; /* Power resources */
	u32 inrush_current:1; /* Serialize Dx->D0 */
	u32 power_removed:1; /* Optimize Dx->D0 */
	u32 reserved:28;
	};

	struct acpi_device_power_state {
	struct {
	u8 valid:1;
	u8 explicit_set:1; /* _PSx present? */
	u8 reserved:6;
	} flags;
	int power; /* % Power (compared to D0) */
	int latency; /* Dx->D0 time (microseconds) */
	struct acpi_handle_list resources; /* Power resources referenced */
	};

	struct acpi_device_power {
	int state; /* Current state */
	struct acpi_device_power_flags flags;
	struct acpi_device_power_state states[4]; /* Power states (D0-D3) */
	};

	/* Performance Management */

	struct acpi_device_perf_flags {
	u8 reserved:8;
	};

	struct acpi_device_perf_state {
	struct {
	u8 valid:1;
	u8 reserved:7;
	} flags;
	u8 power; /* % Power (compared to P0) */
	u8 performance; /* % Performance ( " ) */
	int latency; /* Px->P0 time (microseconds) */
	};

	struct acpi_device_perf {
	int state;
	struct acpi_device_perf_flags flags;
	int state_count;
	struct acpi_device_perf_state *states;
	};

	/* Wakeup Management */
	struct acpi_device_wakeup_flags {
	u8 valid:1; /* Can successfully enable wakeup? */
	u8 prepared:1; /* Has the wake-up capability been enabled? */
	u8 run_wake:1; /* Run-Wake GPE devices */
	};

	struct acpi_device_wakeup_state {
	u8 enabled:1;
	};

	struct acpi_device_wakeup {
	acpi_handle gpe_device;
	acpi_integer gpe_number;
	acpi_integer sleep_state;
	struct acpi_handle_list resources;
	struct acpi_device_wakeup_state state;
	struct acpi_device_wakeup_flags flags;
	};

	/* Device */

	struct acpi_device {
	acpi_handle handle;
	struct acpi_device *parent;
	struct list_head children;
	struct list_head node;
	struct list_head wakeup_list;
	struct acpi_device_status status;
	struct acpi_device_flags flags;
	struct acpi_device_pnp pnp;
	struct acpi_device_power power;
	struct acpi_device_wakeup wakeup;
	struct acpi_device_perf performance;
	struct acpi_device_dir dir;
	struct acpi_device_ops ops;
	struct acpi_driver *driver;
	void *driver_data;
	struct device dev;
	struct acpi_bus_ops bus_ops; /* workaround for different code path for hotplug */
	enum acpi_bus_removal_type removal_type; /* indicate for different removal type */
	};

	static inline void acpi_driver_data(struct acpi_device d)
	{
	return d->driver_data;
	}

	#define to_acpi_device(d) container_of(d, struct acpi_device, dev)
	#define to_acpi_driver(d) container_of(d, struct acpi_driver, drv)

	/* acpi_device.dev.bus == &acpi_bus_type */
	extern struct bus_type acpi_bus_type;

	/*
	* Events
	* ------
	*/

	struct acpi_bus_event {
	struct list_head node;
	acpi_device_class device_class;
	acpi_bus_id bus_id;
	u32 type;
	u32 data;
	};

	extern struct kobject *acpi_kobj;
	extern int acpi_bus_generate_netlink_event(const char, const char, u8, int);
	void acpi_bus_private_data_handler(acpi_handle, u32, void *);
	int acpi_bus_get_private_data(acpi_handle, void **);
	extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
	extern int register_acpi_notifier(struct notifier_block *);
	extern int unregister_acpi_notifier(struct notifier_block *);

	extern int register_acpi_bus_notifier(struct notifier_block *nb);
	extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
	/*
	* External Functions
	*/

	int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
	void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context);
	int acpi_bus_get_status(struct acpi_device *device);
	int acpi_bus_get_power(acpi_handle handle, int *state);
	int acpi_bus_set_power(acpi_handle handle, int state);
	bool acpi_bus_power_manageable(acpi_handle handle);
	bool acpi_bus_can_wakeup(acpi_handle handle);
	#ifdef CONFIG_ACPI_PROC_EVENT
	int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
	int acpi_bus_generate_proc_event4(const char class, const char bid, u8 type, int data);
	int acpi_bus_receive_event(struct acpi_bus_event *event);
	#else
	static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
	{ return 0; }
	#endif
	int acpi_bus_register_driver(struct acpi_driver *driver);
	void acpi_bus_unregister_driver(struct acpi_driver *driver);
	int acpi_bus_add(struct acpi_device *child, struct acpi_device parent,
	acpi_handle handle, int type);
	int acpi_bus_trim(struct acpi_device *start, int rmdevice);
	int acpi_bus_start(struct acpi_device *device);
	acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
	int acpi_match_device_ids(struct acpi_device *device,
	const struct acpi_device_id *ids);
	int acpi_create_dir(struct acpi_device *);
	void acpi_remove_dir(struct acpi_device *);

	/*
	* Bind physical devices with ACPI devices
	*/
	#include <linux/device.h>
	struct acpi_bus_type {
	struct list_head list;
	struct bus_type *bus;
	/* For general devices under the bus */
	int (find_device) (struct device , acpi_handle *);
	/* For bridges, such as PCI root bridge, IDE controller */
	int (find_bridge) (struct device , acpi_handle *);
	};
	int register_acpi_bus_type(struct acpi_bus_type *);
	int unregister_acpi_bus_type(struct acpi_bus_type *);
	struct device *acpi_get_physical_device(acpi_handle);

	/* helper */
	acpi_handle acpi_get_child(acpi_handle, acpi_integer);
	int acpi_is_root_bridge(acpi_handle);
	acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
	#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))

	#ifdef CONFIG_PM_SLEEP
	int acpi_pm_device_sleep_state(struct device , int );
	int acpi_pm_device_sleep_wake(struct device *, bool);
	#else /* !CONFIG_PM_SLEEP */
	static inline int acpi_pm_device_sleep_state(struct device d, int p)
	{
	if (p)
	*p = ACPI_STATE_D0;
	return ACPI_STATE_D3;
	}
	static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
	{
	return -ENODEV;
	}
	#endif /* !CONFIG_PM_SLEEP */

	#endif /* CONFIG_ACPI */

	#endif /__ACPI_BUS_H__/