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| author | Andrew Gabbasov <andrew_gabbasov@mentor.com> | 2014-12-25 16:22:25 (GMT) |
|---|---|---|
| committer | Pantelis Antoniou <pantelis.antoniou@konsulko.com> | 2015-01-19 15:41:52 (GMT) |
| commit | fc5b32fbf3bd43dabaf409e424e0bfb9a1b4df26 (patch) | |
| tree | 534a345ad2ff73c1a2b81acd73e20a027f5d9ed6 /README | |
| parent | bf4770731c1fbd23befb1ffcd0436df2262a3199 (diff) | |
| download | u-boot-fsl-qoriq-fc5b32fbf3bd43dabaf409e424e0bfb9a1b4df26.tar.xz | |
mmc: Skip changing bus width for MMC cards earlier than version 4.0
Wider bus widths (larger than default 1 bit) appeared in MMC standard
version 4.0. So, for MMC cards of any earlier version trying to change
the bus width (including ext_csd comparison) does not make any sense.
It may work incorrectly and at least cause unnecessary timeouts.
So, just skip the entire bus width related activity for earlier versions.
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Tested-by: Alexey Brodkin <abrodkin@synopsys.com>
Diffstat (limited to 'README')
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