于 2012年11月20日 10:21, Chris Ball 写道:
Hi,
Sorry to be pedantic, but:
On Mon, Nov 19 2012, wei_wang@xxxxxxxxxxxxxx wrote:
For Realtek card reader, internal regsiter SD_CFG2 should be configured
before transferring data. In the prior version, the value of this register
has been calculated, but forgotten to write back to the internal register.
With what consequences? Was the data transfer failing? Under which
circumstances?
Thanks,
- Chris.
Hi Chris:
It's about compatibility issue. The default value of SD_CFG2 is proper
for writing data. But for reading sequence, the timing is not good
enough. So in some extreme circumstance, card reader may sample the
response data from the card as good even if the data is wrong. And this
will cause the bad consequence.
Shall I modify the commit and resend the patchset again?
BR,
Wei WANG
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