usb gadget: cdc obex glue

The following patch introduces a new f_obex.c function driver.
It allows userspace obex servers to use usb as transport layer
for their messages.

[ dbrownell@users.sourceforge.net: various fixes and cleanups ]

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 5dda2dc708db..80a7c02dc951 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -576,19 +576,23 @@ config USB_FILE_STORAGE_TEST
           normal operation.
 
 config USB_G_SERIAL
-        tristate "Serial Gadget (with CDC ACM support)"
+        tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
         help
           The Serial Gadget talks to the Linux-USB generic serial driver.
           This driver supports a CDC-ACM module option, which can be used
           to interoperate with MS-Windows hosts or with the Linux-USB
           "cdc-acm" driver.
 
+          This driver also supports a CDC-OBEX option.  You will need a
+          user space OBEX server talking to /dev/ttyGS*, since the kernel
+          itself doesn't implement the OBEX protocol.
+
           Say "y" to link the driver statically, or "m" to build a
           dynamically linked module called "g_serial".
 
           For more information, see Documentation/usb/gadget_serial.txt
           which includes instructions and a "driver info file" needed to
-          make MS-Windows work with this driver.
+          make MS-Windows work with CDC ACM.
 
 config USB_MIDI_GADGET
         tristate "MIDI Gadget (EXPERIMENTAL)"