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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | // 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(sizeof(*cdev), GFP_KERNEL); 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 */ |