mmc: Added quirks for Ricoh 1180:e823 lower base clock frequency
authorManoj Iyer <manoj.iyer@canonical.com>
Mon, 11 Jul 2011 21:28:35 +0000 (16:28 -0500)
committerHerton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
Mon, 29 Aug 2011 19:23:08 +0000 (16:23 -0300)
commit837a30c6f45eb795354e54394fa83f8890d3a142
tree9dcd8e39a6a7a040fdb92f77ceaded87570dc279
parenta83f3d64e1948923a80f181f1a02c8f3de1e9d02
mmc: Added quirks for Ricoh 1180:e823 lower base clock frequency

BugLink: http://bugs.launchpad.net/bugs/773524
Ricoh 1180:e823 does not recognize certain types of SD/MMC cards,
as reported at http://launchpad.net/bugs/773524.  Lowering the SD
base clock frequency from 200Mhz to 50Mhz fixes this issue. This
solution was suggest by Koji Matsumuro, Ricoh Company, Ltd.

This change has no negative performance effect on standard SD
cards, though it's quite possible that there will be one on
UHS-1 cards.

Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com>
Tested-by: Daniel Manrique <daniel.manrique@canonical.com>
Cc: Koji Matsumuro <matsumur@nts.ricoh.co.jp>
Cc: <stable@kernel.org>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
(cherry picked from commit 15bed0f2fa8e1d7db201692532c210a7823d2d21)

Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com>
Acked-by: Leann Ogasawara <leann.ogasawara@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
drivers/pci/quirks.c