usb gadget zero: split out loopback config
This splits the gadget zero "loopback" configuration into a standalone
"configuration driver", building on the composite gadget framework code.
It doesn't yet pull the original code out of gadget zero or update how
that driver is built.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/g_zero.h b/drivers/usb/gadget/g_zero.h
index 2781221..dd2f16a 100644
--- a/drivers/usb/gadget/g_zero.h
+++ b/drivers/usb/gadget/g_zero.h
@@ -9,6 +9,7 @@
#include <linux/usb/composite.h>
/* global state */
+extern unsigned buflen;
extern const struct usb_descriptor_header *otg_desc[];
/* common utilities */
@@ -19,5 +20,6 @@
/* configuration-specific linkup */
int sourcesink_add(struct usb_composite_dev *cdev);
+int loopback_add(struct usb_composite_dev *cdev);
#endif /* __G_ZERO_H */