diff --git a/drivers/parport/share.c b/drivers/parport/share.c
index 7fec4fefe151..62f8407923d4 100644
--- a/drivers/parport/share.c
+++ b/drivers/parport/share.c
@@ -243,7 +243,7 @@ static int port_detect(struct device *dev, void *dev_drv)
 }
 
 /**
- *	parport_register_driver - register a parallel port device driver
+ *	__parport_register_driver - register a parallel port device driver
  *	@drv: structure describing the driver
  *	@owner: owner module of drv
  *	@mod_name: module name string
diff --git a/include/linux/parport.h b/include/linux/parport.h
index 1fb508c19e83..f981f794c850 100644
--- a/include/linux/parport.h
+++ b/include/linux/parport.h
@@ -297,6 +297,37 @@ int __must_check __parport_register_driver(struct parport_driver *,
  * parport_register_driver must be a macro so that KBUILD_MODNAME can
  * be expanded
  */
+
+/**
+ *	parport_register_driver - register a parallel port device driver
+ *	@driver: structure describing the driver
+ *
+ *	This can be called by a parallel port device driver in order
+ *	to receive notifications about ports being found in the
+ *	system, as well as ports no longer available.
+ *
+ *	If devmodel is true then the new device model is used
+ *	for registration.
+ *
+ *	The @driver structure is allocated by the caller and must not be
+ *	deallocated until after calling parport_unregister_driver().
+ *
+ *	If using the non device model:
+ *	The driver's attach() function may block.  The port that
+ *	attach() is given will be valid for the duration of the
+ *	callback, but if the driver wants to take a copy of the
+ *	pointer it must call parport_get_port() to do so.  Calling
+ *	parport_register_device() on that port will do this for you.
+ *
+ *	The driver's detach() function may block.  The port that
+ *	detach() is given will be valid for the duration of the
+ *	callback, but if the driver wants to take a copy of the
+ *	pointer it must call parport_get_port() to do so.
+ *
+ *
+ *	Returns 0 on success. The non device model will always succeeds.
+ *	but the new device model can fail and will return the error code.
+ **/
 #define parport_register_driver(driver)             \
 	__parport_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)