usb: host: xhci: add platform driver support

This adds a fairly simple xhci-platform driver support. Currently it is
used by the dwc3 driver for supporting host mode.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index f9f161fa66ad..e1963d4a430f 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -4064,6 +4064,11 @@ static int __init xhci_hcd_init(void)
                 printk(KERN_DEBUG "Problem registering PCI driver.");
                 return retval;
         }
+        retval = xhci_register_plat();
+        if (retval < 0) {
+                printk(KERN_DEBUG "Problem registering platform driver.");
+                goto unreg_pci;
+        }
         /*
          * Check the compiler generated sizes of structures that must be laid
          * out in specific ways for hardware access.
@@ -4083,11 +4088,15 @@ static int __init xhci_hcd_init(void)
         BUILD_BUG_ON(sizeof(struct xhci_run_regs) != (8+8*128)*32/8);
         BUILD_BUG_ON(sizeof(struct xhci_doorbell_array) != 256*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);