Pierre Ossman 7ccd266e67 mmc: Support for high speed SD cards
Modern SD cards support a clock speed of 50 MHz. Make sure we test for
this capability and do the song and dance required to activate it.

Activating high speed support actually modifies the TRAN_SPEED field
of the CSD. But as the spec says that the cards must report 50 MHz,
we might as well skip re-reading the CSD.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-12-01 18:53:37 +01:00
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