Users report that this device works, as per the comments. As of August 2012 the only mixer available is the generic DICE mixer; while it works, it is, by all accounts, somewhat counter-intuitive when used with this interface. This is not entirely unexpected given that the generic mixer is simply automatically generated using I/O information supplied by the device. Patches to implement a device-specific mixer would be welcome.
Note that the use of the generic DICE mixer was added during 2012; prior to that ffado-mixer did not contain any controls for this device. This should be kept in mind when reading comments related to the mixer made prior to 2012.