HID: Add driver for ION iCade

Add a driver for the ION iCade mini arcade cabinet [1]. The device generates a
key press and release for each joystick movement or button press or release.
For example, moving the stick to the left will generate the "A" key being
pressed and then released.

A list of all the combinations is available in the iCade developer guide [2].

This driver hides all this and makes the device work as a generic joystick.

[1]: http://www.ionaudio.com/products/details/icade
[2]: http://www.ionaudio.com/downloads/iCade_Dev_Resource_v1.3.pdf

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 1630150..813f0fe 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -265,6 +265,15 @@
 	---help---
 	Support for Gyration remote control.
 
+config HID_ICADE
+	tristate "ION iCade arcade controller"
+	depends on (BT_HIDP)
+	---help---
+	Support for the ION iCade arcade controller to work as a joystick.
+
+	To compile this driver as a module, choose M here: the
+	module will be called hid-icade.
+
 config HID_TWINHAN
 	tristate "Twinhan IR remote control"
 	depends on USB_HID