Re: MMC Driver RFC
From: Richard Purdie
Date: Wed Jan 12 2005 - 19:06:44 EST
Ian Molton:
That depends whether the hardware already provides 0.5s of debounce
already. Some people do, some people don't. This is why it needs to
be left to the implementation and not a core issue.
Agreed. IIRC my toshiba PDAs *dont* provide a delay. OTOH they also
provide *two* ways of detecting card presence...
I hadn't realised some devices had hardware debounce and now agree its not a
core problem.
ISTR seeing a SD card doc at some point
The one I'm aware of is
http://www.sdcard.org/sdio/Simplified%20Physical%20Layer%20Specification.PDF
.
Well I *know* I never saw the specs from the SD forum. I hacve never
reverse engineered a SDHC core driver either (I have reverse engineered a
chip driver but it contained no SD *protocol* information.
as such my code should be 100% safe to commit to the kernel.
Having read things and talked to people (both before and since my posts on
LKML), that is my conclusion as well.
PS. Richard - I am here - hope you receive this!
I did. Have my mails to you been getting through?
Richard
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