Based on a patch from Tony Lindgren ... after initialization,
never change HCTL.SDVS except for MMC1.  The other controller
instances only support 1.8V in that field, although they can
suport other card/SDIO/eMMC/... voltages with level shifting
solutions such as external transceivers.

MMC2 behavior sanity tested on Overo/WLAN, OMAP3430 SDP, and
custom hardware.  MMC1 also sanity tested on those platforms
plus Beagle.  This also fixes a bug preventing MMC2 (and also
presumably MMC3) from powering down when requested.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Work around lockdep issue when card detect IRQ handlers run in
thread context ... it forces IRQF_DISABLED, which prevents all
access to twl4030 card detect signals.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

Add omap hsmmc controller for 2430 and 34xx.

Note that this controller has different registers compared to
the earlier omap MMC controller, so sharing code currently is
not possible.

Various updates and fixes from linux-omap list have been
merged into this patch.

Signed-off-by: Madhusudhan Chikkature<madhu.cr@ti.com>
Acked-by: NPierre Ossman <drzeus@drzeus.cx>
Signed-off-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>