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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118// SPDX-License-Identifier: GPL-2.0-or-later/* * container.c - ACPI Generic Container Driver * * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com) * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com) * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com) * Copyright (C) 2004 FUJITSU LIMITED * Copyright (C) 2004, 2013 Intel Corp. * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> */#include <linux/acpi.h>#include <linux/container.h>
#include "internal.h"
static const struct acpi_device_id container_device_ids[] = { {"ACPI0004", 0}, {"PNP0A05", 0}, {"PNP0A06", 0}, {"", 0},};
#ifdef CONFIG_ACPI_CONTAINER
static int check_offline(struct acpi_device *adev, void *not_used){ if (acpi_scan_is_offline(adev, false)) return 0;
return -EBUSY;}
static int acpi_container_offline(struct container_dev *cdev){ /* Check all of the dependent devices' physical companions. */ return acpi_dev_for_each_child(ACPI_COMPANION(&cdev->dev), check_offline, NULL);}
static void acpi_container_release(struct device *dev){ kfree(to_container_dev(dev));}
static int container_device_attach(struct acpi_device *adev, const struct acpi_device_id *not_used){ struct container_dev *cdev; struct device *dev; int ret;
if (adev->flags.is_dock_station) return 0;
cdev = kzalloc_obj(*cdev); if (!cdev) return -ENOMEM;
cdev->offline = acpi_container_offline; dev = &cdev->dev; dev->bus = &container_subsys; dev_set_name(dev, "%s", dev_name(&adev->dev)); ACPI_COMPANION_SET(dev, adev); dev->release = acpi_container_release; ret = device_register(dev); if (ret) { put_device(dev); return ret; } adev->driver_data = dev; return 1;}
static void container_device_detach(struct acpi_device *adev){ struct device *dev = acpi_driver_data(adev);
adev->driver_data = NULL; if (dev) device_unregister(dev);}
static void container_device_online(struct acpi_device *adev){ struct device *dev = acpi_driver_data(adev);
kobject_uevent(&dev->kobj, KOBJ_ONLINE);}
static struct acpi_scan_handler container_handler = { .ids = container_device_ids, .attach = container_device_attach, .detach = container_device_detach, .hotplug = { .enabled = true, .demand_offline = true, .notify_online = container_device_online, },};
void __init acpi_container_init(void){ acpi_scan_add_handler(&container_handler);}
#else
static struct acpi_scan_handler container_handler = { .ids = container_device_ids,};
void __init acpi_container_init(void){ acpi_scan_add_handler_with_hotplug(&container_handler, "container");}
#endif /* CONFIG_ACPI_CONTAINER */