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- /*
- * USB-ACPI glue code
- *
- * Copyright 2012 Red Hat <mjg@redhat.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, version 2.
- *
- */
- #include <linux/module.h>
- #include <linux/usb.h>
- #include <linux/device.h>
- #include <linux/errno.h>
- #include <linux/kernel.h>
- #include <linux/acpi.h>
- #include <linux/pci.h>
- #include <acpi/acpi_bus.h>
- #include "usb.h"
- static int usb_acpi_find_device(struct device *dev, acpi_handle *handle)
- {
- struct usb_device *udev;
- struct device *parent;
- acpi_handle *parent_handle;
- if (!is_usb_device(dev))
- return -ENODEV;
- udev = to_usb_device(dev);
- parent = dev->parent;
- parent_handle = DEVICE_ACPI_HANDLE(parent);
- if (!parent_handle)
- return -ENODEV;
- *handle = acpi_get_child(parent_handle, udev->portnum);
- if (!*handle)
- return -ENODEV;
- return 0;
- }
- static struct acpi_bus_type usb_acpi_bus = {
- .bus = &usb_bus_type,
- .find_bridge = NULL,
- .find_device = usb_acpi_find_device,
- };
- int usb_acpi_register(void)
- {
- return register_acpi_bus_type(&usb_acpi_bus);
- }
- void usb_acpi_unregister(void)
- {
- unregister_acpi_bus_type(&usb_acpi_bus);
- }
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