mmc: Allow the platform to specify the sh_mmcif get_cd handler
authorArnd Hannemann <arnd@arndnet.de>
Tue, 24 Aug 2010 15:27:01 +0000 (17:27 +0200)
committerSamuel Ortiz <sameo@linux.intel.com>
Thu, 28 Oct 2010 22:29:13 +0000 (00:29 +0200)
commit777271d0f33da306575ef776c75f66fc27246bf0
tree24ee153012443783166946cac260c6ccc67de1b2
parent998283e2e359249133f2f47db26669a55ff25c98
mmc: Allow the platform to specify the sh_mmcif get_cd handler

In some platforms (e.g. AP4EVB) the card detect pin of a slot is not
directly connected to the sh_mmcif controller, so that polling needs
to be used. To overcome the overhead induced by querying the controller
on each poll cycle, card detection can be handled in the platform code
more efficiently.
This patch exposes a get_cd hook for that purpose.

Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Tested-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
drivers/mmc/host/sh_mmcif.c
include/linux/mmc/sh_mmcif.h