Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / acpi / container.c

diff --git a/kernel/drivers/acpi/container.c b/kernel/drivers/acpi/container.c
new file mode 100644 (file)
index 0000000..c8ead9f
--- /dev/null
+++ b/kernel/drivers/acpi/container.c
@@ -0,0 +1,136 @@
+/*
+ * 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>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#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 */