Hello,
This kernel enables also 52Mhz high-speed MMC mode (works on Kingston
2GB MMCmobile). Complete summary of changes:
1. legacy MMC cards run at 16Mhz instead of original 12Mhz (1.3x
speedup), my 64MB card included with N770 does not work with this,
others do work (Sandisk 1GB). I suppose the card is buggy as max DTR in
CSD is honored in MMC driver and card claims it can handle up to 20Mhz.
2. MMCplus/mobile cards run at 24 or 48Mhz only if cards claim to
support v4 specs, report its speed in EXT_CSD structure (26 vs 52Mhz)
and switch command to high-speed mode (CMD 6) worked.
Details and kernel here
http://fanoush.webpark.cz/maemo/#mmcplus
Again this specific kernel image was not tested by me as I have
different kernel with MMC drivers compiled as modules.
99% of work was done by Philip Langdale, patches available on LKML:
http://marc.theaimsgroup.com/?l=linux-kernel&m=115974566024309&w=2
http://marc.theaimsgroup.com/?l=linux-kernel&m=115974518926141&w=2
Regards,
Frantisek
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