The patch adds gpio for detecting presence of MMC card.
It fixes issue with kernel hang when MMC card is missing.
Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKukjin Kim <kgene@kernel.org>