diff --git a/include/usb.h b/include/usb.h
index efb67ea..22f6088 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -269,6 +269,7 @@
 			void *data, int len, int *actual_length, int timeout);
 int usb_int_msg(struct usb_device *dev, unsigned long pipe,
 		void *buffer, int transfer_len, int interval, bool nonblock);
+int usb_lock_async(struct usb_device *dev, int lock);
 int usb_disable_asynch(int disable);
 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
 int usb_get_configuration_no(struct usb_device *dev, int cfgno,
@@ -791,6 +792,16 @@
 	 * in a USB transfer. USB class driver needs to be aware of this.
 	 */
 	int (*get_max_xfer_size)(struct udevice *bus, size_t *size);
+
+	/**
+	 * lock_async() - Keep async schedule after a transfer
+	 *
+	 * It may be desired to keep the asynchronous schedule running even
+	 * after a transfer finishes, usually when doing multiple transfers
+	 * back-to-back. This callback allows signalling the USB controller
+	 * driver to do just that.
+	 */
+	int (*lock_async)(struct udevice *udev, int lock);
 };
 
 #define usb_get_ops(dev)	((struct dm_usb_ops *)(dev)->driver->ops)