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Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* container.c - ACPI Generic Container Driver
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*
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* Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com)
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* Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com)
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* Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com)
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* Copyright (C) 2004 FUJITSU LIMITED
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* Copyright (C) 2004, 2013 Intel Corp.
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* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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*/
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#include <linux/acpi.h>
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#include <linux/container.h>
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#include "internal.h"
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#define _COMPONENT ACPI_CONTAINER_COMPONENT
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ACPI_MODULE_NAME("container");
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static const struct acpi_device_id container_device_ids[] = {
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{"ACPI0004", 0},
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{"PNP0A05", 0},
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{"PNP0A06", 0},
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{"", 0},
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};
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#ifdef CONFIG_ACPI_CONTAINER
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static int acpi_container_offline(struct container_dev *cdev)
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{
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struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
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struct acpi_device *child;
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/* Check all of the dependent devices' physical companions. */
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list_for_each_entry(child, &adev->children, node)
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if (!acpi_scan_is_offline(child, false))
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return -EBUSY;
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return 0;
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}
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static void acpi_container_release(struct device *dev)
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{
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kfree(to_container_dev(dev));
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}
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static int container_device_attach(struct acpi_device *adev,
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const struct acpi_device_id *not_used)
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{
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struct container_dev *cdev;
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struct device *dev;
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int ret;
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if (adev->flags.is_dock_station)
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return 0;
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cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
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if (!cdev)
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return -ENOMEM;
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cdev->offline = acpi_container_offline;
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dev = &cdev->dev;
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dev->bus = &container_subsys;
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dev_set_name(dev, "%s", dev_name(&adev->dev));
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ACPI_COMPANION_SET(dev, adev);
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dev->release = acpi_container_release;
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ret = device_register(dev);
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if (ret) {
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put_device(dev);
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return ret;
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}
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adev->driver_data = dev;
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return 1;
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}
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static void container_device_detach(struct acpi_device *adev)
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{
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struct device *dev = acpi_driver_data(adev);
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adev->driver_data = NULL;
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if (dev)
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device_unregister(dev);
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}
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static void container_device_online(struct acpi_device *adev)
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{
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struct device *dev = acpi_driver_data(adev);
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kobject_uevent(&dev->kobj, KOBJ_ONLINE);
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}
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static struct acpi_scan_handler container_handler = {
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.ids = container_device_ids,
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.attach = container_device_attach,
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.detach = container_device_detach,
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.hotplug = {
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.enabled = true,
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.demand_offline = true,
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.notify_online = container_device_online,
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},
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};
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void __init acpi_container_init(void)
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{
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acpi_scan_add_handler(&container_handler);
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}
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#else
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static struct acpi_scan_handler container_handler = {
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.ids = container_device_ids,
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};
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void __init acpi_container_init(void)
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{
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acpi_scan_add_handler_with_hotplug(&container_handler, "container");
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}
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#endif /* CONFIG_ACPI_CONTAINER */
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