sound on wandboard-quad

[Manuel Stühn]

Hi,

is there any support for sound on the imx6-based wandboard quad?  The
wiki-page says no, but there seem to be some drivers (imx6_ssi.c
imx6_audmux.c) which suggest some sound context. Unfortunately i don't know
how to activate them. These drivers are marked as "optional sound" in
"files.imx6".  What does this mean? In a verbose boot of a recent CURRENT
(r335134) I do see the following line:

[..]
simplebus2: <ssi at 2028000> mem 0x2028000-0x202bfff irq 68 compat fsl,imx6q-ssi (no driver attached)
[..]

How can the driver be attached?

Thanks
--
Manuel