Problem with Multiblock Write in PXA270 MMC Driver
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This is a followup to: How do you access MMC driver set_ios? http://lists.arm.linux.org.uk/lurker/message/20101007.144606.f7a7fbcd.en.htmlThe real problem turned out to be that some SD cards fail multiblock write with the PXA270 MMC driver. In our sample, the failing cards were all Sandisk 2GB marked "MADE IN CHINA". Sandisk verified that they were genuine (i.e. not counterfeit). Host platform was Gumstix Verdex Pro. Individual units vary in their failures, so it is likely a signal issue on the boards; it could also likely be an opportunity to make the PXA drivers more robust.
Full details are at: http://old.nabble.com/Root-Cause%3A-Intermittent-SD-Card-Failures-on-Verdex-Pro-to29985059.html Good luck, MMC Driver Maintainers. -- Larry Martin www.GlueLogix.com _______________________________________________ linux-arm mailing list linux-arm@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/linux-arm
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