android: usb: gadget: Allow kernel boot with android gadget.

This patch allows a kernel with android gadget enabled to boot.
Issues fixed:
- Allows the android gadget probe to get deferred if a udc gadget is
  unavailable.
- Check added for udc gadget availability first before "any" android
  initialization.

Change-Id: If6c46d32a32994367d95a57af1e231beafa7bb8a
Signed-off-by: Ruchika Kharwar <ruchika@ti.com>

2 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index b09c37e04a9..8e863b3e802 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -313,6 +313,7 @@ struct usb_composite_driver {
         struct usb_gadget_driver                gadget_driver;
 };
 
+extern int usb_composite_probe_ready(struct usb_composite_driver *driver);
 extern int usb_composite_probe(struct usb_composite_driver *driver);
 extern void usb_composite_unregister(struct usb_composite_driver *driver);
 extern void usb_composite_setup_continue(struct usb_composite_dev *cdev);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 0af6569b8cc..29ae631d8a9 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -880,6 +880,8 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver);
 
 extern int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget);
 extern void usb_del_gadget_udc(struct usb_gadget *gadget);
+extern int usb_gadget_probe_driver_ready(struct usb_gadget_driver *driver);
+
 
 /*-------------------------------------------------------------------------*/