tree 6d10aa3966cf105a8c6d6b758660fa6f00a49896
parent 04ac2f46d6ecb995f78c9ae4e2e4707d00b5339f
author Anton Vorontsov <avorontsov@ru.mvista.com> 1245269648 +0400
committer Pierre Ossman <pierre@ossman.eu> 1245610859 +0200

sdhci: Add support for hosts that are only capable of 1-bit transfers

Some hosts (hardware configurations, or particular SD/MMC slots) may
not support 4-bit bus. For example, on MPC8569E-MDS boards we can
switch between serial (1-bit only) and nibble (4-bit) modes, thought
we have to disable more peripherals to work in 4-bit mode.

Along with some small core changes, this patch modifies sdhci-of
driver, so that now it looks for "sdhci,1-bit-only" property in the
device-tree, and if specified we enable a proper quirk.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>