linux/drivers/acpi/container.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
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>
2019-05-30 11:26:37 -07:00

120 lines
2.7 KiB
C

// 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"
#define _COMPONENT ACPI_CONTAINER_COMPONENT
ACPI_MODULE_NAME("container");
static const struct acpi_device_id container_device_ids[] = {
{"ACPI0004", 0},
{"PNP0A05", 0},
{"PNP0A06", 0},
{"", 0},
};
#ifdef CONFIG_ACPI_CONTAINER
static int acpi_container_offline(struct container_dev *cdev)
{
struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
struct acpi_device *child;
/* Check all of the dependent devices' physical companions. */
list_for_each_entry(child, &adev->children, node)
if (!acpi_scan_is_offline(child, false))
return -EBUSY;
return 0;
}
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 */