From: Hein_Tibosch <hein_tibosch@yahoo.es>
To: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>
Subject: SD power-control necessary?
Date: Fri, 07 Jan 2011 22:39:14 +0800 [thread overview]
Message-ID: <4D272592.6000508@yahoo.es> (raw)
Hello,
Maybe a stupid question, but when designing new hardware with a slot
for an sd-card, how essential is it that the driver is able to power off/on
the card?
I would say essential, because I've seen sd-cards in a state in which they
didn't respond to MMC_GO_IDLE_STATE anymore, until they were re-inserted.
Can anyone shed a light on this? How could an sd-card get into such a state?
Will the mmc driver fall back to mmc_rescan() after an initialized card
becomes non-responsive?
Thanks, Hein
next reply other threads:[~2011-01-07 15:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 14:39 Hein_Tibosch [this message]
2011-01-07 15:37 ` SD power-control necessary? Edward A. Falk
2011-01-07 16:54 ` Chris Ball
2011-01-07 19:53 ` Edward Falk
2011-01-07 15:48 ` Michał Mirosław
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