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740 lines
20 KiB
740 lines
20 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* acpi_bus.h - ACPI Bus Driver ($Revision: 22 $) |
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* |
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* Copyright (C) 2001, 2002 Andy Grover <[email protected]> |
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]> |
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*/ |
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#ifndef __ACPI_BUS_H__ |
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#define __ACPI_BUS_H__ |
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#include <linux/device.h> |
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#include <linux/property.h> |
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/* TBD: Make dynamic */ |
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#define ACPI_MAX_HANDLES 10 |
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struct acpi_handle_list { |
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u32 count; |
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acpi_handle handles[ACPI_MAX_HANDLES]; |
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}; |
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/* acpi_utils.h */ |
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acpi_status |
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acpi_extract_package(union acpi_object *package, |
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struct acpi_buffer *format, struct acpi_buffer *buffer); |
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acpi_status |
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acpi_evaluate_integer(acpi_handle handle, |
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acpi_string pathname, |
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struct acpi_object_list *arguments, unsigned long long *data); |
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acpi_status |
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acpi_evaluate_reference(acpi_handle handle, |
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acpi_string pathname, |
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struct acpi_object_list *arguments, |
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struct acpi_handle_list *list); |
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acpi_status |
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acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code, |
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struct acpi_buffer *status_buf); |
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acpi_status |
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acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld); |
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bool acpi_has_method(acpi_handle handle, char *name); |
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acpi_status acpi_execute_simple_method(acpi_handle handle, char *method, |
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u64 arg); |
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acpi_status acpi_evaluate_ej0(acpi_handle handle); |
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acpi_status acpi_evaluate_lck(acpi_handle handle, int lock); |
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acpi_status acpi_evaluate_reg(acpi_handle handle, u8 space_id, u32 function); |
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bool acpi_ata_match(acpi_handle handle); |
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bool acpi_bay_match(acpi_handle handle); |
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bool acpi_dock_match(acpi_handle handle); |
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bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs); |
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union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid, |
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u64 rev, u64 func, union acpi_object *argv4); |
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static inline union acpi_object * |
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acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev, |
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u64 func, union acpi_object *argv4, |
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acpi_object_type type) |
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{ |
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union acpi_object *obj; |
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obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4); |
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if (obj && obj->type != type) { |
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ACPI_FREE(obj); |
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obj = NULL; |
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} |
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return obj; |
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} |
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#define ACPI_INIT_DSM_ARGV4(cnt, eles) \ |
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{ \ |
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.package.type = ACPI_TYPE_PACKAGE, \ |
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.package.count = (cnt), \ |
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.package.elements = (eles) \ |
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} |
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bool acpi_dev_found(const char *hid); |
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bool acpi_dev_present(const char *hid, const char *uid, s64 hrv); |
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bool acpi_reduced_hardware(void); |
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#ifdef CONFIG_ACPI |
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struct proc_dir_entry; |
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#define ACPI_BUS_FILE_ROOT "acpi" |
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extern struct proc_dir_entry *acpi_root_dir; |
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enum acpi_bus_device_type { |
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ACPI_BUS_TYPE_DEVICE = 0, |
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ACPI_BUS_TYPE_POWER, |
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ACPI_BUS_TYPE_PROCESSOR, |
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ACPI_BUS_TYPE_THERMAL, |
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ACPI_BUS_TYPE_POWER_BUTTON, |
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ACPI_BUS_TYPE_SLEEP_BUTTON, |
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ACPI_BUS_TYPE_ECDT_EC, |
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ACPI_BUS_DEVICE_TYPE_COUNT |
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}; |
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struct acpi_driver; |
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struct acpi_device; |
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/* |
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* ACPI Scan Handler |
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* ----------------- |
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*/ |
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struct acpi_hotplug_profile { |
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struct kobject kobj; |
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int (*scan_dependent)(struct acpi_device *adev); |
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void (*notify_online)(struct acpi_device *adev); |
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bool enabled:1; |
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bool demand_offline:1; |
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}; |
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static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile( |
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struct kobject *kobj) |
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{ |
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return container_of(kobj, struct acpi_hotplug_profile, kobj); |
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} |
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struct acpi_scan_handler { |
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const struct acpi_device_id *ids; |
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struct list_head list_node; |
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bool (*match)(const char *idstr, const struct acpi_device_id **matchid); |
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int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id); |
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void (*detach)(struct acpi_device *dev); |
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void (*bind)(struct device *phys_dev); |
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void (*unbind)(struct device *phys_dev); |
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struct acpi_hotplug_profile hotplug; |
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}; |
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/* |
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* ACPI Hotplug Context |
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* -------------------- |
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*/ |
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struct acpi_hotplug_context { |
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struct acpi_device *self; |
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int (*notify)(struct acpi_device *, u32); |
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void (*uevent)(struct acpi_device *, u32); |
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void (*fixup)(struct acpi_device *); |
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}; |
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/* |
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* ACPI Driver |
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* ----------- |
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*/ |
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typedef int (*acpi_op_add) (struct acpi_device * device); |
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typedef int (*acpi_op_remove) (struct acpi_device * device); |
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typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event); |
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struct acpi_device_ops { |
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acpi_op_add add; |
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acpi_op_remove remove; |
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acpi_op_notify notify; |
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}; |
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#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */ |
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struct acpi_driver { |
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char name[80]; |
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char class[80]; |
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const struct acpi_device_id *ids; /* Supported Hardware IDs */ |
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unsigned int flags; |
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struct acpi_device_ops ops; |
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struct device_driver drv; |
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struct module *owner; |
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}; |
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/* |
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* ACPI Device |
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* ----------- |
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*/ |
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/* Status (_STA) */ |
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struct acpi_device_status { |
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u32 present:1; |
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u32 enabled:1; |
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u32 show_in_ui:1; |
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u32 functional:1; |
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u32 battery_present:1; |
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u32 reserved:27; |
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}; |
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/* Flags */ |
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struct acpi_device_flags { |
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u32 dynamic_status:1; |
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u32 removable:1; |
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u32 ejectable:1; |
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u32 power_manageable:1; |
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u32 match_driver:1; |
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u32 initialized:1; |
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u32 visited:1; |
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u32 hotplug_notify:1; |
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u32 is_dock_station:1; |
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u32 of_compatible_ok:1; |
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u32 coherent_dma:1; |
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u32 cca_seen:1; |
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u32 enumeration_by_parent:1; |
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u32 reserved:19; |
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}; |
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/* File System */ |
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struct acpi_device_dir { |
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struct proc_dir_entry *entry; |
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}; |
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#define acpi_device_dir(d) ((d)->dir.entry) |
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/* Plug and Play */ |
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typedef char acpi_bus_id[8]; |
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typedef u64 acpi_bus_address; |
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typedef char acpi_device_name[40]; |
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typedef char acpi_device_class[20]; |
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struct acpi_hardware_id { |
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struct list_head list; |
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const char *id; |
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}; |
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struct acpi_pnp_type { |
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u32 hardware_id:1; |
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u32 bus_address:1; |
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u32 platform_id:1; |
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u32 reserved:29; |
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}; |
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struct acpi_device_pnp { |
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acpi_bus_id bus_id; /* Object name */ |
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int instance_no; /* Instance number of this object */ |
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struct acpi_pnp_type type; /* ID type */ |
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acpi_bus_address bus_address; /* _ADR */ |
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char *unique_id; /* _UID */ |
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struct list_head ids; /* _HID and _CIDs */ |
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acpi_device_name device_name; /* Driver-determined */ |
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acpi_device_class device_class; /* " */ |
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union acpi_object *str_obj; /* unicode string for _STR method */ |
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}; |
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#define acpi_device_bid(d) ((d)->pnp.bus_id) |
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#define acpi_device_adr(d) ((d)->pnp.bus_address) |
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const char *acpi_device_hid(struct acpi_device *device); |
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#define acpi_device_uid(d) ((d)->pnp.unique_id) |
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#define acpi_device_name(d) ((d)->pnp.device_name) |
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#define acpi_device_class(d) ((d)->pnp.device_class) |
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/* Power Management */ |
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struct acpi_device_power_flags { |
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u32 explicit_get:1; /* _PSC present? */ |
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u32 power_resources:1; /* Power resources */ |
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u32 inrush_current:1; /* Serialize Dx->D0 */ |
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u32 power_removed:1; /* Optimize Dx->D0 */ |
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u32 ignore_parent:1; /* Power is independent of parent power state */ |
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u32 dsw_present:1; /* _DSW present? */ |
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u32 reserved:26; |
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}; |
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struct acpi_device_power_state { |
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struct { |
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u8 valid:1; |
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u8 explicit_set:1; /* _PSx present? */ |
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u8 reserved:6; |
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} flags; |
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int power; /* % Power (compared to D0) */ |
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int latency; /* Dx->D0 time (microseconds) */ |
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struct list_head resources; /* Power resources referenced */ |
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}; |
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struct acpi_device_power { |
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int state; /* Current state */ |
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struct acpi_device_power_flags flags; |
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struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */ |
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}; |
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struct acpi_dep_data { |
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struct list_head node; |
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acpi_handle supplier; |
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acpi_handle consumer; |
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}; |
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/* Performance Management */ |
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struct acpi_device_perf_flags { |
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u8 reserved:8; |
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}; |
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struct acpi_device_perf_state { |
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struct { |
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u8 valid:1; |
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u8 reserved:7; |
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} flags; |
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u8 power; /* % Power (compared to P0) */ |
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u8 performance; /* % Performance ( " ) */ |
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int latency; /* Px->P0 time (microseconds) */ |
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}; |
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struct acpi_device_perf { |
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int state; |
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struct acpi_device_perf_flags flags; |
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int state_count; |
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struct acpi_device_perf_state *states; |
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}; |
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/* Wakeup Management */ |
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struct acpi_device_wakeup_flags { |
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u8 valid:1; /* Can successfully enable wakeup? */ |
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u8 notifier_present:1; /* Wake-up notify handler has been installed */ |
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}; |
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struct acpi_device_wakeup_context { |
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void (*func)(struct acpi_device_wakeup_context *context); |
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struct device *dev; |
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}; |
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struct acpi_device_wakeup { |
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acpi_handle gpe_device; |
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u64 gpe_number; |
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u64 sleep_state; |
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struct list_head resources; |
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struct acpi_device_wakeup_flags flags; |
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struct acpi_device_wakeup_context context; |
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struct wakeup_source *ws; |
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int prepare_count; |
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int enable_count; |
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}; |
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struct acpi_device_physical_node { |
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unsigned int node_id; |
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struct list_head node; |
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struct device *dev; |
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bool put_online:1; |
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}; |
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struct acpi_device_properties { |
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const guid_t *guid; |
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const union acpi_object *properties; |
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struct list_head list; |
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}; |
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/* ACPI Device Specific Data (_DSD) */ |
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struct acpi_device_data { |
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const union acpi_object *pointer; |
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struct list_head properties; |
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const union acpi_object *of_compatible; |
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struct list_head subnodes; |
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}; |
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struct acpi_gpio_mapping; |
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/* Device */ |
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struct acpi_device { |
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int device_type; |
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acpi_handle handle; /* no handle for fixed hardware */ |
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struct fwnode_handle fwnode; |
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struct acpi_device *parent; |
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struct list_head children; |
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struct list_head node; |
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struct list_head wakeup_list; |
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struct list_head del_list; |
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struct acpi_device_status status; |
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struct acpi_device_flags flags; |
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struct acpi_device_pnp pnp; |
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struct acpi_device_power power; |
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struct acpi_device_wakeup wakeup; |
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struct acpi_device_perf performance; |
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struct acpi_device_dir dir; |
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struct acpi_device_data data; |
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struct acpi_scan_handler *handler; |
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struct acpi_hotplug_context *hp; |
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struct acpi_driver *driver; |
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const struct acpi_gpio_mapping *driver_gpios; |
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void *driver_data; |
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struct device dev; |
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unsigned int physical_node_count; |
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unsigned int dep_unmet; |
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struct list_head physical_node_list; |
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struct mutex physical_node_lock; |
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void (*remove)(struct acpi_device *); |
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}; |
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/* Non-device subnode */ |
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struct acpi_data_node { |
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const char *name; |
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acpi_handle handle; |
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struct fwnode_handle fwnode; |
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struct fwnode_handle *parent; |
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struct acpi_device_data data; |
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struct list_head sibling; |
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struct kobject kobj; |
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struct completion kobj_done; |
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}; |
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extern const struct fwnode_operations acpi_device_fwnode_ops; |
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extern const struct fwnode_operations acpi_data_fwnode_ops; |
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extern const struct fwnode_operations acpi_static_fwnode_ops; |
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bool is_acpi_device_node(const struct fwnode_handle *fwnode); |
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bool is_acpi_data_node(const struct fwnode_handle *fwnode); |
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static inline bool is_acpi_node(const struct fwnode_handle *fwnode) |
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{ |
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return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode)); |
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} |
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#define to_acpi_device_node(__fwnode) \ |
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({ \ |
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typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \ |
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\ |
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is_acpi_device_node(__to_acpi_device_node_fwnode) ? \ |
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container_of(__to_acpi_device_node_fwnode, \ |
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struct acpi_device, fwnode) : \ |
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NULL; \ |
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}) |
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#define to_acpi_data_node(__fwnode) \ |
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({ \ |
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typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \ |
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\ |
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is_acpi_data_node(__to_acpi_data_node_fwnode) ? \ |
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container_of(__to_acpi_data_node_fwnode, \ |
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struct acpi_data_node, fwnode) : \ |
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NULL; \ |
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}) |
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static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode) |
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{ |
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return !IS_ERR_OR_NULL(fwnode) && |
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fwnode->ops == &acpi_static_fwnode_ops; |
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} |
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static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode, |
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const char *name) |
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{ |
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return is_acpi_data_node(fwnode) ? |
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(!strcmp(to_acpi_data_node(fwnode)->name, name)) : false; |
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} |
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static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev) |
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{ |
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return &adev->fwnode; |
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} |
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static inline void *acpi_driver_data(struct acpi_device *d) |
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{ |
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return d->driver_data; |
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} |
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#define to_acpi_device(d) container_of(d, struct acpi_device, dev) |
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#define to_acpi_driver(d) container_of(d, struct acpi_driver, drv) |
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static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta) |
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{ |
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*((u32 *)&adev->status) = sta; |
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} |
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static inline void acpi_set_hp_context(struct acpi_device *adev, |
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struct acpi_hotplug_context *hp) |
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{ |
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hp->self = adev; |
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adev->hp = hp; |
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} |
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void acpi_initialize_hp_context(struct acpi_device *adev, |
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struct acpi_hotplug_context *hp, |
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int (*notify)(struct acpi_device *, u32), |
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void (*uevent)(struct acpi_device *, u32)); |
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/* acpi_device.dev.bus == &acpi_bus_type */ |
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extern struct bus_type acpi_bus_type; |
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/* |
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* Events |
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* ------ |
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*/ |
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struct acpi_bus_event { |
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struct list_head node; |
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acpi_device_class device_class; |
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acpi_bus_id bus_id; |
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u32 type; |
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u32 data; |
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}; |
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extern struct kobject *acpi_kobj; |
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extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int); |
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void acpi_bus_private_data_handler(acpi_handle, void *); |
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int acpi_bus_get_private_data(acpi_handle, void **); |
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int acpi_bus_attach_private_data(acpi_handle, void *); |
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void acpi_bus_detach_private_data(acpi_handle); |
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extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32); |
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extern int register_acpi_notifier(struct notifier_block *); |
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extern int unregister_acpi_notifier(struct notifier_block *); |
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/* |
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* External Functions |
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*/ |
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int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device); |
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acpi_status acpi_bus_get_status_handle(acpi_handle handle, |
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unsigned long long *sta); |
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int acpi_bus_get_status(struct acpi_device *device); |
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int acpi_bus_set_power(acpi_handle handle, int state); |
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const char *acpi_power_state_string(int state); |
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int acpi_device_set_power(struct acpi_device *device, int state); |
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int acpi_bus_init_power(struct acpi_device *device); |
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int acpi_device_fix_up_power(struct acpi_device *device); |
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int acpi_bus_update_power(acpi_handle handle, int *state_p); |
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int acpi_device_update_power(struct acpi_device *device, int *state_p); |
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bool acpi_bus_power_manageable(acpi_handle handle); |
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int acpi_device_power_add_dependent(struct acpi_device *adev, |
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struct device *dev); |
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void acpi_device_power_remove_dependent(struct acpi_device *adev, |
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struct device *dev); |
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#ifdef CONFIG_PM |
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bool acpi_bus_can_wakeup(acpi_handle handle); |
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#else |
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static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; } |
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#endif |
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void acpi_scan_lock_acquire(void); |
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void acpi_scan_lock_release(void); |
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void acpi_lock_hp_context(void); |
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void acpi_unlock_hp_context(void); |
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int acpi_scan_add_handler(struct acpi_scan_handler *handler); |
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int acpi_bus_register_driver(struct acpi_driver *driver); |
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void acpi_bus_unregister_driver(struct acpi_driver *driver); |
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int acpi_bus_scan(acpi_handle handle); |
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void acpi_bus_trim(struct acpi_device *start); |
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acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd); |
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int acpi_match_device_ids(struct acpi_device *device, |
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const struct acpi_device_id *ids); |
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void acpi_set_modalias(struct acpi_device *adev, const char *default_id, |
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char *modalias, size_t len); |
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int acpi_create_dir(struct acpi_device *); |
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void acpi_remove_dir(struct acpi_device *); |
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static inline bool acpi_device_enumerated(struct acpi_device *adev) |
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{ |
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return adev && adev->flags.initialized && adev->flags.visited; |
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} |
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/** |
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* module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver |
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* @__acpi_driver: acpi_driver struct |
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* |
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* Helper macro for ACPI drivers which do not do anything special in module |
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* init/exit. This eliminates a lot of boilerplate. Each module may only |
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* use this macro once, and calling it replaces module_init() and module_exit() |
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*/ |
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#define module_acpi_driver(__acpi_driver) \ |
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module_driver(__acpi_driver, acpi_bus_register_driver, \ |
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acpi_bus_unregister_driver) |
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/* |
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* Bind physical devices with ACPI devices |
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*/ |
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struct acpi_bus_type { |
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struct list_head list; |
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const char *name; |
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bool (*match)(struct device *dev); |
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struct acpi_device * (*find_companion)(struct device *); |
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void (*setup)(struct device *); |
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void (*cleanup)(struct device *); |
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}; |
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int register_acpi_bus_type(struct acpi_bus_type *); |
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int unregister_acpi_bus_type(struct acpi_bus_type *); |
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int acpi_bind_one(struct device *dev, struct acpi_device *adev); |
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int acpi_unbind_one(struct device *dev); |
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struct acpi_pci_root { |
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struct acpi_device * device; |
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struct pci_bus *bus; |
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u16 segment; |
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struct resource secondary; /* downstream bus range */ |
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u32 osc_support_set; /* _OSC state of support bits */ |
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u32 osc_control_set; /* _OSC state of control bits */ |
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phys_addr_t mcfg_addr; |
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}; |
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|
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/* helper */ |
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bool acpi_dma_supported(const struct acpi_device *adev); |
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enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev); |
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int acpi_iommu_fwspec_init(struct device *dev, u32 id, |
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struct fwnode_handle *fwnode, |
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const struct iommu_ops *ops); |
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int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset, |
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u64 *size); |
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int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, |
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const u32 *input_id); |
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static inline int acpi_dma_configure(struct device *dev, |
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enum dev_dma_attr attr) |
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{ |
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return acpi_dma_configure_id(dev, attr, NULL); |
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} |
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struct acpi_device *acpi_find_child_device(struct acpi_device *parent, |
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u64 address, bool check_children); |
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int acpi_is_root_bridge(acpi_handle); |
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struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle); |
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int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state); |
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int acpi_disable_wakeup_device_power(struct acpi_device *dev); |
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#ifdef CONFIG_X86 |
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bool acpi_device_always_present(struct acpi_device *adev); |
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#else |
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static inline bool acpi_device_always_present(struct acpi_device *adev) |
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{ |
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return false; |
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} |
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#endif |
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#ifdef CONFIG_PM |
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void acpi_pm_wakeup_event(struct device *dev); |
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acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev, |
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void (*func)(struct acpi_device_wakeup_context *context)); |
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acpi_status acpi_remove_pm_notifier(struct acpi_device *adev); |
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bool acpi_pm_device_can_wakeup(struct device *dev); |
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int acpi_pm_device_sleep_state(struct device *, int *, int); |
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int acpi_pm_set_device_wakeup(struct device *dev, bool enable); |
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#else |
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static inline void acpi_pm_wakeup_event(struct device *dev) |
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{ |
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} |
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static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev, |
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struct device *dev, |
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void (*func)(struct acpi_device_wakeup_context *context)) |
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{ |
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return AE_SUPPORT; |
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} |
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static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev) |
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{ |
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return AE_SUPPORT; |
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} |
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static inline bool acpi_pm_device_can_wakeup(struct device *dev) |
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{ |
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return false; |
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} |
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static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m) |
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{ |
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if (p) |
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*p = ACPI_STATE_D0; |
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return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ? |
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m : ACPI_STATE_D0; |
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} |
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static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable) |
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{ |
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return -ENODEV; |
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} |
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#endif |
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#ifdef CONFIG_ACPI_SYSTEM_POWER_STATES_SUPPORT |
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bool acpi_sleep_state_supported(u8 sleep_state); |
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#else |
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static inline bool acpi_sleep_state_supported(u8 sleep_state) { return false; } |
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#endif |
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#ifdef CONFIG_ACPI_SLEEP |
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u32 acpi_target_system_state(void); |
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#else |
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static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; } |
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#endif |
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static inline bool acpi_device_power_manageable(struct acpi_device *adev) |
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{ |
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return adev->flags.power_manageable; |
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} |
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static inline bool acpi_device_can_wakeup(struct acpi_device *adev) |
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{ |
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return adev->wakeup.flags.valid; |
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} |
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static inline bool acpi_device_can_poweroff(struct acpi_device *adev) |
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{ |
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return adev->power.states[ACPI_STATE_D3_COLD].flags.valid || |
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((acpi_gbl_FADT.header.revision < 6) && |
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adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); |
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} |
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bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2); |
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void acpi_dev_clear_dependencies(struct acpi_device *supplier); |
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struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier); |
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struct acpi_device * |
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acpi_dev_get_next_match_dev(struct acpi_device *adev, const char *hid, const char *uid, s64 hrv); |
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struct acpi_device * |
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acpi_dev_get_first_match_dev(const char *hid, const char *uid, s64 hrv); |
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/** |
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* for_each_acpi_dev_match - iterate over ACPI devices that matching the criteria |
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* @adev: pointer to the matching ACPI device, NULL at the end of the loop |
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* @hid: Hardware ID of the device. |
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* @uid: Unique ID of the device, pass NULL to not check _UID |
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* @hrv: Hardware Revision of the device, pass -1 to not check _HRV |
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* |
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* The caller is responsible for invoking acpi_dev_put() on the returned device. |
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*/ |
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#define for_each_acpi_dev_match(adev, hid, uid, hrv) \ |
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for (adev = acpi_dev_get_first_match_dev(hid, uid, hrv); \ |
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adev; \ |
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adev = acpi_dev_get_next_match_dev(adev, hid, uid, hrv)) |
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static inline struct acpi_device *acpi_dev_get(struct acpi_device *adev) |
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{ |
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return adev ? to_acpi_device(get_device(&adev->dev)) : NULL; |
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} |
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static inline void acpi_dev_put(struct acpi_device *adev) |
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{ |
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if (adev) |
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put_device(&adev->dev); |
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} |
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struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle); |
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static inline void acpi_bus_put_acpi_device(struct acpi_device *adev) |
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{ |
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acpi_dev_put(adev); |
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} |
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#else /* CONFIG_ACPI */ |
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static inline int register_acpi_bus_type(void *bus) { return 0; } |
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static inline int unregister_acpi_bus_type(void *bus) { return 0; } |
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#endif /* CONFIG_ACPI */ |
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#endif /*__ACPI_BUS_H__*/
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