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SubjectRe: [patch 4/4] sdio: disable CD resistor
On Tue, 07 Aug 2007 15:46:36 +0100
David Vrabel <> wrote:

> Is there an example driver for a host that uses pin 1/DAT3 sensing for
> card detection? I'm curious about how removal detections work.

Both wbsd and sdhci have experienced hardware with this. In sdhci this
is hidden completely in hardware, but wbsd has to do some funky logic
to handle the problem.

> App Note on card detection goes into the use of this resistor in more
> detail but I don't believe this document is publicly available :(.

SD is a wonderful world. :/

-- Pierre Ossman

Linux kernel, MMC maintainer
PulseAudio, core developer
rdesktop, core developer
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