xhci: Allow xHCI drivers to be built as separate modules

Instead of building all of the xHCI code into a single module, separate
it out into the core (xhci-hcd), PCI (xhci-pci, now selected by the new
config option CONFIG_USB_XHCI_PCI), and platform (xhci-plat) drivers.
Also update the PCI/platform drivers with module descriptions/licenses
and have them register their respective drivers in their initcalls.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 22 deletions

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 3e0f5c7aed7a..2a5d45b4cb15 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -4982,18 +4982,6 @@ MODULE_LICENSE("GPL");
 
 static int __init xhci_hcd_init(void)
 {
-        int retval;
-
-        retval = xhci_register_pci();
-        if (retval < 0) {
-                pr_debug("Problem registering PCI driver.\n");
-                return retval;
-        }
-        retval = xhci_register_plat();
-        if (retval < 0) {
-                pr_debug("Problem registering platform driver.\n");
-                goto unreg_pci;
-        }
         /*
          * Check the compiler generated sizes of structures that must be laid
          * out in specific ways for hardware access.
@@ -5012,15 +5000,5 @@ static int __init xhci_hcd_init(void)
         /* xhci_run_regs has eight fields and embeds 128 xhci_intr_regs */
         BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8);
         return 0;
-unreg_pci:
-        xhci_unregister_pci();
-        return retval;
 }
 module_init(xhci_hcd_init);
-
-static void __exit xhci_hcd_cleanup(void)
-{
-        xhci_unregister_pci();
-        xhci_unregister_plat();
-}
-module_exit(xhci_hcd_cleanup);