On Thu, 16 Jan 2014, Olof Johansson wrote:

"for SDIO slots" is somewhat misleading; nearly all controllers only
do one slot/device per controller. The designware controller can do
multiple slots, and that adds a bit of driver and binding complexity
for something that seemingly not a single vendor has actually
implemented.

The Marvell 8688, just to name one, does both WIFI and BlueTooth over 
the same SDIO controller using separate functions/slots.

Or maybe I'm misunderstanding you?


Nicolas