#5717 NORM Never A: OFW SD driver needs a delay
Zarro Boogs per Child
bugtracker at laptop.org
Wed Dec 26 20:31:50 EST 2007
#5717: OFW SD driver needs a delay
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Reporter: wmb at firmworks.com | Owner: wmb at firmworks.com
Type: defect | Status: new
Priority: normal | Milestone: Never Assigned
Component: ofw - open firmware | Version:
Keywords: | Verified: 0
Blocking: | Blockedby:
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Some SD cards won't power up properly unless you put a delay after the
reset-card command. One example is a Kingston 4 GB SDHC card.
Empirically, 60 microseconds between reset-card and send-if-cond is
enough, but the Linux driver uses 1 ms, so that is probably better.
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Ticket URL: <http://dev.laptop.org/ticket/5717>
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