From 9e89dde2b063ca73fcdc9244fe68e2dea32c5088 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Thu, 7 Dec 2006 20:56:16 +0800 Subject: ACPI: clean up scan.c Adjust the code and make code doing similar things together. No logic changes. Signed-off-by : Zhang Rui Signed-off-by: Len Brown diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 698a154..e0255cb 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -111,233 +111,6 @@ static struct kset acpi_namespace_kset = { .uevent_ops = &namespace_uevent_ops, }; -static void acpi_device_register(struct acpi_device *device, - struct acpi_device *parent) -{ - int err; - - /* - * Linkage - * ------- - * Link this device to its parent and siblings. - */ - INIT_LIST_HEAD(&device->children); - INIT_LIST_HEAD(&device->node); - INIT_LIST_HEAD(&device->g_list); - INIT_LIST_HEAD(&device->wakeup_list); - - spin_lock(&acpi_device_lock); - if (device->parent) { - list_add_tail(&device->node, &device->parent->children); - list_add_tail(&device->g_list, &device->parent->g_list); - } else - list_add_tail(&device->g_list, &acpi_device_list); - if (device->wakeup.flags.valid) - list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); - spin_unlock(&acpi_device_lock); - - strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN); - if (parent) - device->kobj.parent = &parent->kobj; - device->kobj.ktype = &ktype_acpi_ns; - device->kobj.kset = &acpi_namespace_kset; - err = kobject_register(&device->kobj); - if (err < 0) - printk(KERN_WARNING "%s: kobject_register error: %d\n", - __FUNCTION__, err); - create_sysfs_device_files(device); -} - -static void acpi_device_unregister(struct acpi_device *device, int type) -{ - spin_lock(&acpi_device_lock); - if (device->parent) { - list_del(&device->node); - list_del(&device->g_list); - } else - list_del(&device->g_list); - - list_del(&device->wakeup_list); - - spin_unlock(&acpi_device_lock); - - acpi_detach_data(device->handle, acpi_bus_data_handler); - remove_sysfs_device_files(device); - kobject_unregister(&device->kobj); -} - -void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) -{ - - /* TBD */ - - return; -} - -static int acpi_bus_get_power_flags(struct acpi_device *device) -{ - acpi_status status = 0; - acpi_handle handle = NULL; - u32 i = 0; - - - /* - * Power Management Flags - */ - status = acpi_get_handle(device->handle, "_PSC", &handle); - if (ACPI_SUCCESS(status)) - device->power.flags.explicit_get = 1; - status = acpi_get_handle(device->handle, "_IRC", &handle); - if (ACPI_SUCCESS(status)) - device->power.flags.inrush_current = 1; - - /* - * Enumerate supported power management states - */ - for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { - struct acpi_device_power_state *ps = &device->power.states[i]; - char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; - - /* Evaluate "_PRx" to se if power resources are referenced */ - acpi_evaluate_reference(device->handle, object_name, NULL, - &ps->resources); - if (ps->resources.count) { - device->power.flags.power_resources = 1; - ps->flags.valid = 1; - } - - /* Evaluate "_PSx" to see if we can do explicit sets */ - object_name[2] = 'S'; - status = acpi_get_handle(device->handle, object_name, &handle); - if (ACPI_SUCCESS(status)) { - ps->flags.explicit_set = 1; - ps->flags.valid = 1; - } - - /* State is valid if we have some power control */ - if (ps->resources.count || ps->flags.explicit_set) - ps->flags.valid = 1; - - ps->power = -1; /* Unknown - driver assigned */ - ps->latency = -1; /* Unknown - driver assigned */ - } - - /* Set defaults for D0 and D3 states (always valid) */ - device->power.states[ACPI_STATE_D0].flags.valid = 1; - device->power.states[ACPI_STATE_D0].power = 100; - device->power.states[ACPI_STATE_D3].flags.valid = 1; - device->power.states[ACPI_STATE_D3].power = 0; - - /* TBD: System wake support and resource requirements. */ - - device->power.state = ACPI_STATE_UNKNOWN; - - return 0; -} - -int acpi_match_ids(struct acpi_device *device, char *ids) -{ - if (device->flags.hardware_id) - if (strstr(ids, device->pnp.hardware_id)) - return 0; - - if (device->flags.compatible_ids) { - struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; - int i; - - /* compare multiple _CID entries against driver ids */ - for (i = 0; i < cid_list->count; i++) { - if (strstr(ids, cid_list->id[i].value)) - return 0; - } - } - return -ENOENT; -} - -static acpi_status -acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, - union acpi_object *package) -{ - int i = 0; - union acpi_object *element = NULL; - - if (!device || !package || (package->package.count < 2)) - return AE_BAD_PARAMETER; - - element = &(package->package.elements[0]); - if (!element) - return AE_BAD_PARAMETER; - if (element->type == ACPI_TYPE_PACKAGE) { - if ((element->package.count < 2) || - (element->package.elements[0].type != - ACPI_TYPE_LOCAL_REFERENCE) - || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) - return AE_BAD_DATA; - device->wakeup.gpe_device = - element->package.elements[0].reference.handle; - device->wakeup.gpe_number = - (u32) element->package.elements[1].integer.value; - } else if (element->type == ACPI_TYPE_INTEGER) { - device->wakeup.gpe_number = element->integer.value; - } else - return AE_BAD_DATA; - - element = &(package->package.elements[1]); - if (element->type != ACPI_TYPE_INTEGER) { - return AE_BAD_DATA; - } - device->wakeup.sleep_state = element->integer.value; - - if ((package->package.count - 2) > ACPI_MAX_HANDLES) { - return AE_NO_MEMORY; - } - device->wakeup.resources.count = package->package.count - 2; - for (i = 0; i < device->wakeup.resources.count; i++) { - element = &(package->package.elements[i + 2]); - if (element->type != ACPI_TYPE_ANY) { - return AE_BAD_DATA; - } - - device->wakeup.resources.handles[i] = element->reference.handle; - } - - return AE_OK; -} - -static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) -{ - acpi_status status = 0; - struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; - union acpi_object *package = NULL; - - - /* _PRW */ - status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); - goto end; - } - - package = (union acpi_object *)buffer.pointer; - status = acpi_bus_extract_wakeup_device_power_package(device, package); - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); - goto end; - } - - kfree(buffer.pointer); - - device->wakeup.flags.valid = 1; - /* Power button, Lid switch always enable wakeup */ - if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) - device->wakeup.flags.run_wake = 1; - - end: - if (ACPI_FAILURE(status)) - device->flags.wake_capable = 0; - return 0; -} - /* -------------------------------------------------------------------------- ACPI sysfs device file support -------------------------------------------------------------------------- */ @@ -447,20 +220,86 @@ acpi_eject_store(struct acpi_device *device, const char *buf, size_t count) } /* -------------------------------------------------------------------------- - Performance Management + ACPI Bus operations -------------------------------------------------------------------------- */ +static inline struct acpi_device * to_acpi_dev(struct device * dev) +{ + return container_of(dev, struct acpi_device, dev); +} -static int acpi_bus_get_perf_flags(struct acpi_device *device) +static int root_suspend(struct acpi_device * acpi_dev, pm_message_t state) { - device->performance.state = ACPI_STATE_UNKNOWN; + struct acpi_device * dev, * next; + int result; + + spin_lock(&acpi_device_lock); + list_for_each_entry_safe_reverse(dev, next, &acpi_device_list, g_list) { + if (dev->driver && dev->driver->ops.suspend) { + spin_unlock(&acpi_device_lock); + result = dev->driver->ops.suspend(dev, 0); + if (result) { + printk(KERN_ERR PREFIX "[%s - %s] Suspend failed: %d\n", + acpi_device_name(dev), + acpi_device_bid(dev), result); + } + spin_lock(&acpi_device_lock); + } + } + spin_unlock(&acpi_device_lock); return 0; } -/* -------------------------------------------------------------------------- - Driver Management - -------------------------------------------------------------------------- */ +static int acpi_device_suspend(struct device * dev, pm_message_t state) +{ + struct acpi_device * acpi_dev = to_acpi_dev(dev); -static LIST_HEAD(acpi_bus_drivers); + /* + * For now, we should only register 1 generic device - + * the ACPI root device - and from there, we walk the + * tree of ACPI devices to suspend each one using the + * ACPI driver methods. + */ + if (acpi_dev->handle == ACPI_ROOT_OBJECT) + root_suspend(acpi_dev, state); + return 0; +} + +static int root_resume(struct acpi_device * acpi_dev) +{ + struct acpi_device * dev, * next; + int result; + + spin_lock(&acpi_device_lock); + list_for_each_entry_safe(dev, next, &acpi_device_list, g_list) { + if (dev->driver && dev->driver->ops.resume) { + spin_unlock(&acpi_device_lock); + result = dev->driver->ops.resume(dev, 0); + if (result) { + printk(KERN_ERR PREFIX "[%s - %s] resume failed: %d\n", + acpi_device_name(dev), + acpi_device_bid(dev), result); + } + spin_lock(&acpi_device_lock); + } + } + spin_unlock(&acpi_device_lock); + return 0; +} + +static int acpi_device_resume(struct device * dev) +{ + struct acpi_device * acpi_dev = to_acpi_dev(dev); + + /* + * For now, we should only register 1 generic device - + * the ACPI root device - and from there, we walk the + * tree of ACPI devices to resume each one using the + * ACPI driver methods. + */ + if (acpi_dev->handle == ACPI_ROOT_OBJECT) + root_resume(acpi_dev); + return 0; +} /** * acpi_bus_match - match device IDs to driver's supported IDs @@ -478,6 +317,72 @@ acpi_bus_match(struct acpi_device *device, struct acpi_driver *driver) return acpi_match_ids(device, driver->ids); } +static struct bus_type acpi_bus_type = { + .name = "acpi", + .suspend = acpi_device_suspend, + .resume = acpi_device_resume, +}; + +static void acpi_device_register(struct acpi_device *device, + struct acpi_device *parent) +{ + int err; + + /* + * Linkage + * ------- + * Link this device to its parent and siblings. + */ + INIT_LIST_HEAD(&device->children); + INIT_LIST_HEAD(&device->node); + INIT_LIST_HEAD(&device->g_list); + INIT_LIST_HEAD(&device->wakeup_list); + + spin_lock(&acpi_device_lock); + if (device->parent) { + list_add_tail(&device->node, &device->parent->children); + list_add_tail(&device->g_list, &device->parent->g_list); + } else + list_add_tail(&device->g_list, &acpi_device_list); + if (device->wakeup.flags.valid) + list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); + spin_unlock(&acpi_device_lock); + + strlcpy(device->kobj.name, device->pnp.bus_id, KOBJ_NAME_LEN); + if (parent) + device->kobj.parent = &parent->kobj; + device->kobj.ktype = &ktype_acpi_ns; + device->kobj.kset = &acpi_namespace_kset; + err = kobject_register(&device->kobj); + if (err < 0) + printk(KERN_WARNING "%s: kobject_register error: %d\n", + __FUNCTION__, err); + create_sysfs_device_files(device); +} + +static void acpi_device_unregister(struct acpi_device *device, int type) +{ + spin_lock(&acpi_device_lock); + if (device->parent) { + list_del(&device->node); + list_del(&device->g_list); + } else + list_del(&device->g_list); + + list_del(&device->wakeup_list); + + spin_unlock(&acpi_device_lock); + + acpi_detach_data(device->handle, acpi_bus_data_handler); + remove_sysfs_device_files(device); + kobject_unregister(&device->kobj); +} + +/* -------------------------------------------------------------------------- + Driver Management + -------------------------------------------------------------------------- */ +static LIST_HEAD(acpi_bus_drivers); + /** * acpi_bus_driver_init - add a device to a driver * @device: the device to add and initialize @@ -583,114 +488,290 @@ static void acpi_driver_detach(struct acpi_driver *drv) atomic_dec(&drv->references); } } - spin_unlock(&acpi_device_lock); + spin_unlock(&acpi_device_lock); +} + +/** + * acpi_bus_register_driver - register a driver with the ACPI bus + * @driver: driver being registered + * + * Registers a driver with the ACPI bus. Searches the namespace for all + * devices that match the driver's criteria and binds. Returns zero for + * success or a negative error status for failure. + */ +int acpi_bus_register_driver(struct acpi_driver *driver) +{ + + if (acpi_disabled) + return -ENODEV; + + spin_lock(&acpi_device_lock); + list_add_tail(&driver->node, &acpi_bus_drivers); + spin_unlock(&acpi_device_lock); + acpi_driver_attach(driver); + + return 0; +} + +EXPORT_SYMBOL(acpi_bus_register_driver); + +/** + * acpi_bus_unregister_driver - unregisters a driver with the APIC bus + * @driver: driver to unregister + * + * Unregisters a driver with the ACPI bus. Searches the namespace for all + * devices that match the driver's criteria and unbinds. + */ +void acpi_bus_unregister_driver(struct acpi_driver *driver) +{ + acpi_driver_detach(driver); + + if (!atomic_read(&driver->references)) { + spin_lock(&acpi_device_lock); + list_del_init(&driver->node); + spin_unlock(&acpi_device_lock); + } + return; +} + +EXPORT_SYMBOL(acpi_bus_unregister_driver); + +/** + * acpi_bus_find_driver - check if there is a driver installed for the device + * @device: device that we are trying to find a supporting driver for + * + * Parses the list of registered drivers looking for a driver applicable for + * the specified device. + */ +static int acpi_bus_find_driver(struct acpi_device *device) +{ + int result = 0; + struct list_head *node, *next; + + + spin_lock(&acpi_device_lock); + list_for_each_safe(node, next, &acpi_bus_drivers) { + struct acpi_driver *driver = + container_of(node, struct acpi_driver, node); + + atomic_inc(&driver->references); + spin_unlock(&acpi_device_lock); + if (!acpi_bus_match(device, driver)) { + result = acpi_bus_driver_init(device, driver); + if (!result) + goto Done; + } + atomic_dec(&driver->references); + spin_lock(&acpi_device_lock); + } + spin_unlock(&acpi_device_lock); + + Done: + return result; +} + +/* -------------------------------------------------------------------------- + Device Enumeration + -------------------------------------------------------------------------- */ +acpi_status +acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) +{ + acpi_status status; + acpi_handle tmp; + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; + union acpi_object *obj; + + status = acpi_get_handle(handle, "_EJD", &tmp); + if (ACPI_FAILURE(status)) + return status; + + status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); + if (ACPI_SUCCESS(status)) { + obj = buffer.pointer; + status = acpi_get_handle(NULL, obj->string.pointer, ejd); + kfree(buffer.pointer); + } + return status; +} +EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); + +void acpi_bus_data_handler(acpi_handle handle, u32 function, void *context) +{ + + /* TBD */ + + return; +} + +int acpi_match_ids(struct acpi_device *device, char *ids) +{ + if (device->flags.hardware_id) + if (strstr(ids, device->pnp.hardware_id)) + return 0; + + if (device->flags.compatible_ids) { + struct acpi_compatible_id_list *cid_list = device->pnp.cid_list; + int i; + + /* compare multiple _CID entries against driver ids */ + for (i = 0; i < cid_list->count; i++) { + if (strstr(ids, cid_list->id[i].value)) + return 0; + } + } + return -ENOENT; +} + +static int acpi_bus_get_perf_flags(struct acpi_device *device) +{ + device->performance.state = ACPI_STATE_UNKNOWN; + return 0; +} + +static acpi_status +acpi_bus_extract_wakeup_device_power_package(struct acpi_device *device, + union acpi_object *package) +{ + int i = 0; + union acpi_object *element = NULL; + + if (!device || !package || (package->package.count < 2)) + return AE_BAD_PARAMETER; + + element = &(package->package.elements[0]); + if (!element) + return AE_BAD_PARAMETER; + if (element->type == ACPI_TYPE_PACKAGE) { + if ((element->package.count < 2) || + (element->package.elements[0].type != + ACPI_TYPE_LOCAL_REFERENCE) + || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) + return AE_BAD_DATA; + device->wakeup.gpe_device = + element->package.elements[0].reference.handle; + device->wakeup.gpe_number = + (u32) element->package.elements[1].integer.value; + } else if (element->type == ACPI_TYPE_INTEGER) { + device->wakeup.gpe_number = element->integer.value; + } else + return AE_BAD_DATA; + + element = &(package->package.elements[1]); + if (element->type != ACPI_TYPE_INTEGER) { + return AE_BAD_DATA; + } + device->wakeup.sleep_state = element->integer.value; + + if ((package->package.count - 2) > ACPI_MAX_HANDLES) { + return AE_NO_MEMORY; + } + device->wakeup.resources.count = package->package.count - 2; + for (i = 0; i < device->wakeup.resources.count; i++) { + element = &(package->package.elements[i + 2]); + if (element->type != ACPI_TYPE_ANY) { + return AE_BAD_DATA; + } + + device->wakeup.resources.handles[i] = element->reference.handle; + } + + return AE_OK; } -/** - * acpi_bus_register_driver - register a driver with the ACPI bus - * @driver: driver being registered - * - * Registers a driver with the ACPI bus. Searches the namespace for all - * devices that match the driver's criteria and binds. Returns zero for - * success or a negative error status for failure. - */ -int acpi_bus_register_driver(struct acpi_driver *driver) +static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) { + acpi_status status = 0; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *package = NULL; - if (acpi_disabled) - return -ENODEV; - spin_lock(&acpi_device_lock); - list_add_tail(&driver->node, &acpi_bus_drivers); - spin_unlock(&acpi_device_lock); - acpi_driver_attach(driver); + /* _PRW */ + status = acpi_evaluate_object(device->handle, "_PRW", NULL, &buffer); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); + goto end; + } - return 0; -} + package = (union acpi_object *)buffer.pointer; + status = acpi_bus_extract_wakeup_device_power_package(device, package); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); + goto end; + } -EXPORT_SYMBOL(acpi_bus_register_driver); + kfree(buffer.pointer); -/** - * acpi_bus_unregister_driver - unregisters a driver with the APIC bus - * @driver: driver to unregister - * - * Unregisters a driver with the ACPI bus. Searches the namespace for all - * devices that match the driver's criteria and unbinds. - */ -void acpi_bus_unregister_driver(struct acpi_driver *driver) -{ - acpi_driver_detach(driver); + device->wakeup.flags.valid = 1; + /* Power button, Lid switch always enable wakeup */ + if (!acpi_match_ids(device, "PNP0C0D,PNP0C0C,PNP0C0E")) + device->wakeup.flags.run_wake = 1; - if (!atomic_read(&driver->references)) { - spin_lock(&acpi_device_lock); - list_del_init(&driver->node); - spin_unlock(&acpi_device_lock); - } - return; + end: + if (ACPI_FAILURE(status)) + device->flags.wake_capable = 0; + return 0; } -EXPORT_SYMBOL(acpi_bus_unregister_driver); - -/** - * acpi_bus_find_driver - check if there is a driver installed for the device - * @device: device that we are trying to find a supporting driver for - * - * Parses the list of registered drivers looking for a driver applicable for - * the specified device. - */ -static int acpi_bus_find_driver(struct acpi_device *device) +static int acpi_bus_get_power_flags(struct acpi_device *device) { - int result = 0; - struct list_head *node, *next; + acpi_status status = 0; + acpi_handle handle = NULL; + u32 i = 0; - spin_lock(&acpi_device_lock); - list_for_each_safe(node, next, &acpi_bus_drivers) { - struct acpi_driver *driver = - container_of(node, struct acpi_driver, node); + /* + * Power Management Flags + */ + status = acpi_get_handle(device->handle, "_PSC", &handle); + if (ACPI_SUCCESS(status)) + device->power.flags.explicit_get = 1; + status = acpi_get_handle(device->handle, "_IRC", &handle); + if (ACPI_SUCCESS(status)) + device->power.flags.inrush_current = 1; - atomic_inc(&driver->references); - spin_unlock(&acpi_device_lock); - if (!acpi_bus_match(device, driver)) { - result = acpi_bus_driver_init(device, driver); - if (!result) - goto Done; + /* + * Enumerate supported power management states + */ + for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3; i++) { + struct acpi_device_power_state *ps = &device->power.states[i]; + char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; + + /* Evaluate "_PRx" to se if power resources are referenced */ + acpi_evaluate_reference(device->handle, object_name, NULL, + &ps->resources); + if (ps->resources.count) { + device->power.flags.power_resources = 1; + ps->flags.valid = 1; } - atomic_dec(&driver->references); - spin_lock(&acpi_device_lock); - } - spin_unlock(&acpi_device_lock); - Done: - return result; -} + /* Evaluate "_PSx" to see if we can do explicit sets */ + object_name[2] = 'S'; + status = acpi_get_handle(device->handle, object_name, &handle); + if (ACPI_SUCCESS(status)) { + ps->flags.explicit_set = 1; + ps->flags.valid = 1; + } -/* -------------------------------------------------------------------------- - Device Enumeration - -------------------------------------------------------------------------- */ + /* State is valid if we have some power control */ + if (ps->resources.count || ps->flags.explicit_set) + ps->flags.valid = 1; -acpi_status -acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) -{ - acpi_status status; - acpi_handle tmp; - struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; - union acpi_object *obj; + ps->power = -1; /* Unknown - driver assigned */ + ps->latency = -1; /* Unknown - driver assigned */ + } - status = acpi_get_handle(handle, "_EJD", &tmp); - if (ACPI_FAILURE(status)) - return status; + /* Set defaults for D0 and D3 states (always valid) */ + device->power.states[ACPI_STATE_D0].flags.valid = 1; + device->power.states[ACPI_STATE_D0].power = 100; + device->power.states[ACPI_STATE_D3].flags.valid = 1; + device->power.states[ACPI_STATE_D3].power = 0; - status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); - if (ACPI_SUCCESS(status)) { - obj = buffer.pointer; - status = acpi_get_handle(NULL, obj->string.pointer, ejd); - kfree(buffer.pointer); - } - return status; -} -EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); + /* TBD: System wake support and resource requirements. */ + + device->power.state = ACPI_STATE_UNKNOWN; + return 0; +} static int acpi_bus_get_flags(struct acpi_device *device) { @@ -1353,100 +1434,6 @@ static int acpi_bus_scan_fixed(struct acpi_device *root) return result; } - -static inline struct acpi_device * to_acpi_dev(struct device * dev) -{ - return container_of(dev, struct acpi_device, dev); -} - - -static int root_suspend(struct acpi_device * acpi_dev, pm_message_t state) -{ - struct acpi_device * dev, * next; - int result; - - spin_lock(&acpi_device_lock); - list_for_each_entry_safe_reverse(dev, next, &acpi_device_list, g_list) { - if (dev->driver && dev->driver->ops.suspend) { - spin_unlock(&acpi_device_lock); - result = dev->driver->ops.suspend(dev, 0); - if (result) { - printk(KERN_ERR PREFIX "[%s - %s] Suspend failed: %d\n", - acpi_device_name(dev), - acpi_device_bid(dev), result); - } - spin_lock(&acpi_device_lock); - } - } - spin_unlock(&acpi_device_lock); - return 0; -} - - -static int acpi_device_suspend(struct device * dev, pm_message_t state) -{ - struct acpi_device * acpi_dev = to_acpi_dev(dev); - - /* - * For now, we should only register 1 generic device - - * the ACPI root device - and from there, we walk the - * tree of ACPI devices to suspend each one using the - * ACPI driver methods. - */ - if (acpi_dev->handle == ACPI_ROOT_OBJECT) - root_suspend(acpi_dev, state); - return 0; -} - - - -static int root_resume(struct acpi_device * acpi_dev) -{ - struct acpi_device * dev, * next; - int result; - - spin_lock(&acpi_device_lock); - list_for_each_entry_safe(dev, next, &acpi_device_list, g_list) { - if (dev->driver && dev->driver->ops.resume) { - spin_unlock(&acpi_device_lock); - result = dev->driver->ops.resume(dev, 0); - if (result) { - printk(KERN_ERR PREFIX "[%s - %s] resume failed: %d\n", - acpi_device_name(dev), - acpi_device_bid(dev), result); - } - spin_lock(&acpi_device_lock); - } - } - spin_unlock(&acpi_device_lock); - return 0; -} - - -static int acpi_device_resume(struct device * dev) -{ - struct acpi_device * acpi_dev = to_acpi_dev(dev); - - /* - * For now, we should only register 1 generic device - - * the ACPI root device - and from there, we walk the - * tree of ACPI devices to resume each one using the - * ACPI driver methods. - */ - if (acpi_dev->handle == ACPI_ROOT_OBJECT) - root_resume(acpi_dev); - return 0; -} - - -static struct bus_type acpi_bus_type = { - .name = "acpi", - .suspend = acpi_device_suspend, - .resume = acpi_device_resume, -}; - - - static int __init acpi_scan_init(void) { int result; -- cgit v0.10.2