On Thu, Jan 16, 2014 at 09:15:17AM -0800, 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.

So we can likely assume to keep these reset/power/clock lines per host
controller, no need to add a slot construct.

Actually, the atmel chips have two slots per controller so it would
probably be better to think about that now.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com