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/* SPDX-License-Identifier: GPL-2.0-or-later */
* acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
* Copyright (C) 2001, 2002 Andy Grover <>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <>
#ifndef __ACPI_BUS_H__
#define __ACPI_BUS_H__
#include <linux/completion.h>
#include <linux/container_of.h>
#include <linux/device.h>
#include <linux/kobject.h>
#include <linux/mutex.h>
#include <linux/property.h>
#include <linux/types.h>
struct acpi_handle_list {
u32 count;
acpi_handle *handles;
/* acpi_utils.h */
acpi_extract_package(union acpi_object *package,
struct acpi_buffer *format, struct acpi_buffer *buffer);
acpi_evaluate_integer(acpi_handle handle,
acpi_string pathname,
struct acpi_object_list *arguments, unsigned long long *data);
bool acpi_evaluate_reference(acpi_handle handle, acpi_string pathname,
struct acpi_object_list *arguments,
struct acpi_handle_list *list);
bool acpi_handle_list_equal(struct acpi_handle_list *list1,
struct acpi_handle_list *list2);
void acpi_handle_list_replace(struct acpi_handle_list *dst,
struct acpi_handle_list *src);
void acpi_handle_list_free(struct acpi_handle_list *list);
bool acpi_device_dep(acpi_handle target, acpi_handle match);
acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
struct acpi_buffer *status_buf);
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
bool acpi_has_method(acpi_handle handle, char *name);
acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
u64 arg);
acpi_status acpi_evaluate_ej0(acpi_handle handle);
acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function);
bool acpi_ata_match(acpi_handle handle);
bool acpi_bay_match(acpi_handle handle);
bool acpi_dock_match(acpi_handle handle);
bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs);
union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
u64 rev, u64 func, union acpi_object *argv4);
static inline union acpi_object *
acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
u64 func, union acpi_object *argv4,
acpi_object_type type)
union acpi_object *obj;
obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4);
if (obj && obj->type != type) {
obj = NULL;
return obj;
#define ACPI_INIT_DSM_ARGV4(cnt, eles) \
{ \
.package.type = ACPI_TYPE_PACKAGE, \
.package.count = (cnt), \
.package.elements = (eles) \
bool acpi_dev_found(const char *hid);
bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
bool acpi_reduced_hardware(void);
struct proc_dir_entry;
#define ACPI_BUS_FILE_ROOT "acpi"
extern struct proc_dir_entry *acpi_root_dir;
enum acpi_bus_device_type {
struct acpi_driver;
struct acpi_device;
* ACPI Scan Handler
* -----------------
struct acpi_hotplug_profile {
struct kobject kobj;
int (*scan_dependent)(struct acpi_device *adev);
void (*notify_online)(struct acpi_device *adev);
bool enabled:1;
bool demand_offline:1;
static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
struct kobject *kobj)
return container_of(kobj, struct acpi_hotplug_profile, kobj);
struct acpi_scan_handler {
struct list_head list_node;
const struct acpi_device_id *ids;
bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
void (*detach)(struct acpi_device *dev);
void (*bind)(struct device *phys_dev);
void (*unbind)(struct device *phys_dev);
struct acpi_hotplug_profile hotplug;
* ACPI Hotplug Context
* --------------------
typedef int (*acpi_hp_notify) (struct acpi_device *, u32);
typedef void (*acpi_hp_uevent) (struct acpi_device *, u32);
typedef void (*acpi_hp_fixup) (struct acpi_device *);
struct acpi_hotplug_context {
struct acpi_device *self;
acpi_hp_notify notify;
acpi_hp_uevent uevent;
acpi_hp_fixup fixup;
* ACPI Driver
* -----------
typedef int (*acpi_op_add) (struct acpi_device * device);
typedef void (*acpi_op_remove) (struct acpi_device *device);
typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
struct acpi_device_ops {
acpi_op_add add;
acpi_op_remove remove;
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;
* 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 removable:1;
u32 ejectable:1;
u32 power_manageable:1;
u32 match_driver:1;
u32 initialized:1;
u32 visited:1;
u32 hotplug_notify:1;
u32 is_dock_station:1;
u32 of_compatible_ok:1;
u32 coherent_dma:1;
u32 cca_seen:1;
u32 enumeration_by_parent:1;
u32 honor_deps:1;
u32 reserved:18;
/* 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 u64 acpi_bus_address;
typedef char acpi_device_name[40];
typedef char acpi_device_class[20];
struct acpi_hardware_id {
struct list_head list;
const char *id;
struct acpi_pnp_type {
u32 hardware_id:1;
u32 bus_address:1;
u32 platform_id:1;
u32 backlight:1;
u32 reserved:28;
struct acpi_device_pnp {
acpi_bus_id bus_id; /* Object name */
int instance_no; /* Instance number of this object */
struct acpi_pnp_type type; /* ID type */
acpi_bus_address bus_address; /* _ADR */
char *unique_id; /* _UID */
struct list_head ids; /* _HID and _CIDs */
acpi_device_name device_name; /* Driver-determined */
acpi_device_class device_class; /* " */
union acpi_object *str_obj; /* unicode string for _STR method */
#define acpi_device_bid(d) ((d)->pnp.bus_id)
#define acpi_device_adr(d) ((d)->pnp.bus_address)
const char *acpi_device_hid(struct acpi_device *device);
#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 ignore_parent:1; /* Power is independent of parent power state */
u32 dsw_present:1; /* _DSW present? */
u32 reserved:26;
struct acpi_device_power_state {
struct list_head resources; /* Power resources referenced */
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_device_power {
int state; /* Current state */
struct acpi_device_power_flags flags;
struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */
u8 state_for_enumeration; /* Deepest power state for enumeration */
struct acpi_dep_data {
struct list_head node;
acpi_handle supplier;
acpi_handle consumer;
bool honor_dep;
bool met;
bool free_when_met;
/* 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 notifier_present:1; /* Wake-up notify handler has been installed */
struct acpi_device_wakeup_context {
void (*func)(struct acpi_device_wakeup_context *context);
struct device *dev;
struct acpi_device_wakeup {
acpi_handle gpe_device;
u64 gpe_number;
u64 sleep_state;
struct list_head resources;
struct acpi_device_wakeup_flags flags;
struct acpi_device_wakeup_context context;
struct wakeup_source *ws;
int prepare_count;
int enable_count;
struct acpi_device_physical_node {
struct list_head node;
struct device *dev;
unsigned int node_id;
bool put_online:1;
struct acpi_device_properties {
struct list_head list;
const guid_t *guid;
union acpi_object *properties;
void **bufs;
/* ACPI Device Specific Data (_DSD) */
struct acpi_device_data {
const union acpi_object *pointer;
struct list_head properties;
const union acpi_object *of_compatible;
struct list_head subnodes;
struct acpi_gpio_mapping;
* The maximum expected number of CSI-2 data lanes.
* This number is not expected to ever have to be equal to or greater than the
* number of bits in an unsigned long variable, but if it needs to be increased
* above that limit, code will need to be adjusted accordingly.
enum acpi_device_swnode_dev_props {
enum acpi_device_swnode_port_props {
enum acpi_device_swnode_ep_props {
/* TX only */
* Each device has a root software node plus two times as many nodes as the
* number of CSI-2 ports.
#define ACPI_DEVICE_SWNODE_PORT(port) (2 * (port) + 1)
#define ACPI_DEVICE_SWNODE_EP(endpoint) \
* struct acpi_device_software_node_port - MIPI DisCo for Imaging CSI-2 port
* @port_name: Port name.
* @data_lanes: "data-lanes" property values.
* @lane_polarities: "lane-polarities" property values.
* @link_frequencies: "link_frequencies" property values.
* @port_nr: Port number.
* @crs_crs2_local: _CRS CSI2 record present (i.e. this is a transmitter one).
* @port_props: Port properties.
* @ep_props: Endpoint properties.
* @remote_ep: Reference to the remote endpoint.
struct acpi_device_software_node_port {
u32 data_lanes[ACPI_DEVICE_CSI2_DATA_LANES];
u32 lane_polarities[ACPI_DEVICE_CSI2_DATA_LANES + 1 /* clock lane */];
u64 link_frequencies[ACPI_DEVICE_CSI2_DATA_LANES];
unsigned int port_nr;
bool crs_csi2_local;
struct property_entry port_props[ACPI_DEVICE_SWNODE_PORT_NUM_ENTRIES];
struct property_entry ep_props[ACPI_DEVICE_SWNODE_EP_NUM_ENTRIES];
struct software_node_ref_args remote_ep[1];
* struct acpi_device_software_nodes - Software nodes for an ACPI device
* @dev_props: Device properties.
* @nodes: Software nodes for root as well as ports and endpoints.
* @nodeprts: Array of software node pointers, for (un)registering them.
* @ports: Information related to each port and endpoint within a port.
* @num_ports: The number of ports.
struct acpi_device_software_nodes {
struct property_entry dev_props[ACPI_DEVICE_SWNODE_DEV_NUM_ENTRIES];
struct software_node *nodes;
const struct software_node **nodeptrs;
struct acpi_device_software_node_port *ports;
unsigned int num_ports;
/* Device */
struct acpi_device {
u32 pld_crc;
int device_type;
acpi_handle handle; /* no handle for fixed hardware */
struct fwnode_handle fwnode;
struct list_head wakeup_list;
struct list_head del_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_data data;
struct acpi_scan_handler *handler;
struct acpi_hotplug_context *hp;
struct acpi_device_software_nodes *swnodes;
const struct acpi_gpio_mapping *driver_gpios;
void *driver_data;
struct device dev;
unsigned int physical_node_count;
unsigned int dep_unmet;
struct list_head physical_node_list;
struct mutex physical_node_lock;
void (*remove)(struct acpi_device *);
/* Non-device subnode */
struct acpi_data_node {
struct list_head sibling;
const char *name;
acpi_handle handle;
struct fwnode_handle fwnode;
struct fwnode_handle *parent;
struct acpi_device_data data;
struct kobject kobj;
struct completion kobj_done;
extern const struct fwnode_operations acpi_device_fwnode_ops;
extern const struct fwnode_operations acpi_data_fwnode_ops;
extern const struct fwnode_operations acpi_static_fwnode_ops;
bool is_acpi_device_node(const struct fwnode_handle *fwnode);
bool is_acpi_data_node(const struct fwnode_handle *fwnode);
static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
#define to_acpi_device_node(__fwnode) \
({ \
typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
is_acpi_device_node(__to_acpi_device_node_fwnode) ? \
container_of(__to_acpi_device_node_fwnode, \
struct acpi_device, fwnode) : \
#define to_acpi_data_node(__fwnode) \
({ \
typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
is_acpi_data_node(__to_acpi_data_node_fwnode) ? \
container_of(__to_acpi_data_node_fwnode, \
struct acpi_data_node, fwnode) : \
static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
return !IS_ERR_OR_NULL(fwnode) &&
fwnode->ops == &acpi_static_fwnode_ops;
static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
const char *name)
return is_acpi_data_node(fwnode) ?
(!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
return &adev->fwnode;
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)
static inline struct acpi_device *acpi_dev_parent(struct acpi_device *adev)
if (adev->dev.parent)
return to_acpi_device(adev->dev.parent);
return NULL;
static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
*((u32 *)&adev->status) = sta;
static inline void acpi_set_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp)
hp->self = adev;
adev->hp = hp;
void acpi_initialize_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp,
acpi_hp_notify notify, acpi_hp_uevent uevent);
/* == &acpi_bus_type */
extern const struct bus_type acpi_bus_type;
int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data);
int acpi_dev_for_each_child(struct acpi_device *adev,
int (*fn)(struct acpi_device *, void *), void *data);
int acpi_dev_for_each_child_reverse(struct acpi_device *adev,
int (*fn)(struct acpi_device *, void *),
void *data);
* 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, void *);
int acpi_bus_get_private_data(acpi_handle, void **);
int acpi_bus_attach_private_data(acpi_handle, void *);
void acpi_bus_detach_private_data(acpi_handle);
int acpi_dev_install_notify_handler(struct acpi_device *adev,
u32 handler_type,
acpi_notify_handler handler, void *context);
void acpi_dev_remove_notify_handler(struct acpi_device *adev,
u32 handler_type,
acpi_notify_handler handler);
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 *);
* External Functions
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);
int acpi_bus_set_power(acpi_handle handle, int state);
const char *acpi_power_state_string(int state);
int acpi_device_set_power(struct acpi_device *device, int state);
int acpi_bus_init_power(struct acpi_device *device);
int acpi_device_fix_up_power(struct acpi_device *device);
void acpi_device_fix_up_power_extended(struct acpi_device *adev);
void acpi_device_fix_up_power_children(struct acpi_device *adev);
int acpi_bus_update_power(acpi_handle handle, int *state_p);
int acpi_device_update_power(struct acpi_device *device, int *state_p);
bool acpi_bus_power_manageable(acpi_handle handle);
void acpi_dev_power_up_children_with_adr(struct acpi_device *adev);
u8 acpi_dev_power_state_for_wake(struct acpi_device *adev);
int acpi_device_power_add_dependent(struct acpi_device *adev,
struct device *dev);
void acpi_device_power_remove_dependent(struct acpi_device *adev,
struct device *dev);
#ifdef CONFIG_PM
bool acpi_bus_can_wakeup(acpi_handle handle);
static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
void acpi_scan_lock_acquire(void);
void acpi_scan_lock_release(void);
void acpi_lock_hp_context(void);
void acpi_unlock_hp_context(void);
int acpi_scan_add_handler(struct acpi_scan_handler *handler);
* use a macro to avoid include chaining to get THIS_MODULE
#define acpi_bus_register_driver(drv) \
__acpi_bus_register_driver(drv, THIS_MODULE)
int __acpi_bus_register_driver(struct acpi_driver *driver, struct module *owner);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_scan(acpi_handle handle);
void acpi_bus_trim(struct acpi_device *start);
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);
void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
char *modalias, size_t len);
static inline bool acpi_device_enumerated(struct acpi_device *adev)
return adev && adev->flags.initialized && adev->flags.visited;
* module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
* @__acpi_driver: acpi_driver struct
* Helper macro for ACPI drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
#define module_acpi_driver(__acpi_driver) \
module_driver(__acpi_driver, acpi_bus_register_driver, \
* Bind physical devices with ACPI devices
struct acpi_bus_type {
struct list_head list;
const char *name;
bool (*match)(struct device *dev);
struct acpi_device * (*find_companion)(struct device *);
void (*setup)(struct device *);
int register_acpi_bus_type(struct acpi_bus_type *);
int unregister_acpi_bus_type(struct acpi_bus_type *);
int acpi_bind_one(struct device *dev, struct acpi_device *adev);
int acpi_unbind_one(struct device *dev);
enum acpi_bridge_type {
struct acpi_pci_root {
struct acpi_device * device;
struct pci_bus *bus;
u16 segment;
int bridge_type;
struct resource secondary; /* downstream bus range */
u32 osc_support_set; /* _OSC state of support bits */
u32 osc_control_set; /* _OSC state of control bits */
u32 osc_ext_support_set; /* _OSC state of extended support bits */
u32 osc_ext_control_set; /* _OSC state of extended control bits */
phys_addr_t mcfg_addr;
/* helper */
struct iommu_ops;
bool acpi_dma_supported(const struct acpi_device *adev);
enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
int acpi_iommu_fwspec_init(struct device *dev, u32 id,
struct fwnode_handle *fwnode,
const struct iommu_ops *ops);
int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map);
int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
const u32 *input_id);
static inline int acpi_dma_configure(struct device *dev,
enum dev_dma_attr attr)
return acpi_dma_configure_id(dev, attr, NULL);
struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
u64 address, bool check_children);
struct acpi_device *acpi_find_child_by_adr(struct acpi_device *adev,
acpi_bus_address adr);
int acpi_is_root_bridge(acpi_handle);
struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
int acpi_disable_wakeup_device_power(struct acpi_device *dev);
#ifdef CONFIG_X86
bool acpi_device_override_status(struct acpi_device *adev, unsigned long long *status);
bool acpi_quirk_skip_acpi_ac_and_battery(void);
int acpi_install_cmos_rtc_space_handler(acpi_handle handle);
void acpi_remove_cmos_rtc_space_handler(acpi_handle handle);
int acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip);
static inline bool acpi_device_override_status(struct acpi_device *adev,
unsigned long long *status)
return false;
static inline bool acpi_quirk_skip_acpi_ac_and_battery(void)
return false;
static inline int acpi_install_cmos_rtc_space_handler(acpi_handle handle)
return 1;
static inline void acpi_remove_cmos_rtc_space_handler(acpi_handle handle)
static inline int
acpi_quirk_skip_serdev_enumeration(struct device *controller_parent, bool *skip)
*skip = false;
return 0;
bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev);
bool acpi_quirk_skip_gpio_event_handlers(void);
static inline bool acpi_quirk_skip_i2c_client_enumeration(struct acpi_device *adev)
return false;
static inline bool acpi_quirk_skip_gpio_event_handlers(void)
return false;
#ifdef CONFIG_PM
void acpi_pm_wakeup_event(struct device *dev);
acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
void (*func)(struct acpi_device_wakeup_context *context));
acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
bool acpi_pm_device_can_wakeup(struct device *dev);
int acpi_pm_device_sleep_state(struct device *, int *, int);
int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
static inline void acpi_pm_wakeup_event(struct device *dev)
static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
struct device *dev,
void (*func)(struct acpi_device_wakeup_context *context))
return AE_SUPPORT;
static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
return AE_SUPPORT;
static inline bool acpi_pm_device_can_wakeup(struct device *dev)
return false;
static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
if (p)
return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
return -ENODEV;
bool acpi_sleep_state_supported(u8 sleep_state);
static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; }
u32 acpi_target_system_state(void);
static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
static inline bool acpi_device_power_manageable(struct acpi_device *adev)
return adev->flags.power_manageable;
static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
return adev->wakeup.flags.valid;
static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
((acpi_gbl_FADT.header.revision < 6) &&
int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer);
static inline bool acpi_dev_hid_match(struct acpi_device *adev, const char *hid2)
const char *hid1 = acpi_device_hid(adev);
return hid1 && hid2 && !strcmp(hid1, hid2);
static inline bool acpi_str_uid_match(struct acpi_device *adev, const char *uid2)
const char *uid1 = acpi_device_uid(adev);
return uid1 && uid2 && !strcmp(uid1, uid2);
static inline bool acpi_int_uid_match(struct acpi_device *adev, u64 uid2)
u64 uid1;
return !acpi_dev_uid_to_integer(adev, &uid1) && uid1 == uid2;
#define TYPE_ENTRY(type, x) \
const type: x, \
type: x
#define ACPI_STR_TYPES(match) \
TYPE_ENTRY(unsigned char *, match), \
TYPE_ENTRY(signed char *, match), \
TYPE_ENTRY(char *, match), \
TYPE_ENTRY(void *, match)
* acpi_dev_uid_match - Match device by supplied UID
* @adev: ACPI device to match.
* @uid2: Unique ID of the device.
* Matches UID in @adev with given @uid2.
* Returns: %true if matches, %false otherwise.
#define acpi_dev_uid_match(adev, uid2) \
_Generic(uid2, \
/* Treat @uid2 as a string for acpi string types */ \
ACPI_STR_TYPES(acpi_str_uid_match), \
/* Treat as an integer otherwise */ \
default: acpi_int_uid_match)(adev, uid2)
* acpi_dev_hid_uid_match - Match device by supplied HID and UID
* @adev: ACPI device to match.
* @hid2: Hardware ID of the device.
* @uid2: Unique ID of the device, pass NULL to not check _UID.
* Matches HID and UID in @adev with given @hid2 and @uid2. Absence of @uid2
* will be treated as a match. If user wants to validate @uid2, it should be
* done before calling this function.
* Returns: %true if matches or @uid2 is NULL, %false otherwise.
#define acpi_dev_hid_uid_match(adev, hid2, uid2) \
(acpi_dev_hid_match(adev, hid2) && \
/* Distinguish integer 0 from NULL @uid2 */ \
(_Generic(uid2, ACPI_STR_TYPES(!(uid2)), default: 0) || \
acpi_dev_uid_match(adev, uid2)))
void acpi_dev_clear_dependencies(struct acpi_device *supplier);
bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);
struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier,
struct acpi_device *start);
* for_each_acpi_consumer_dev - iterate over the consumer ACPI devices for a
* given supplier
* @supplier: Pointer to the supplier's ACPI device
* @consumer: Pointer to &struct acpi_device to hold the consumer, initially NULL
#define for_each_acpi_consumer_dev(supplier, consumer) \
for (consumer = acpi_dev_get_next_consumer_dev(supplier, NULL); \
consumer; \
consumer = acpi_dev_get_next_consumer_dev(supplier, consumer))
struct acpi_device *
acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv);
struct acpi_device *
acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv);
* for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria
* @adev: pointer to the matching ACPI device, NULL at the end of the loop
* @hid: Hardware ID of the device.
* @uid: Unique ID of the device, pass NULL to not check _UID
* @hrv: Hardware Revision of the device, pass -1 to not check _HRV
* The caller is responsible for invoking acpi_dev_put() on the returned device.
#define for_each_acpi_dev_match(adev, hid, uid, hrv) \
for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \
adev; \
adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv))
static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev)
return adev ? to_acpi_device(get_device(&adev->dev)) : NULL;
static inline void acpi_dev_put(struct acpi_device *adev)
if (adev)
struct acpi_device *acpi_fetch_acpi_dev(acpi_handle handle);
struct acpi_device *acpi_get_acpi_dev(acpi_handle handle);
static inline void acpi_put_acpi_dev(struct acpi_device *adev)
int acpi_wait_for_acpi_ipmi(void);
#else /* CONFIG_ACPI */
static inline int register_acpi_bus_type(void *bus) { return 0; }
static inline int unregister_acpi_bus_type(void *bus) { return 0; }
static inline int acpi_wait_for_acpi_ipmi(void) { return 0; }
#endif /* CONFIG_ACPI */
#endif /*__ACPI_BUS_H__*/