From: Pierre Ossman <drzeus-mmc@drzeus.cx>
To: "Mike Frysinger" <vapier.adi@gmail.com>
Cc: "Bryan Wu" <cooloney.lkml@gmail.com>,
"Cai, Cliff" <Cliff.Cai@analog.com>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] split MMC_CAP_4_BIT_DATA
Date: Fri, 11 Jan 2008 11:05:05 +0100 [thread overview]
Message-ID: <20080111110505.615ae436@poseidon.drzeus.cx> (raw)
In-Reply-To: <8bd0f97a0801110147w1cc741c3yc80ad32cd0e896c9@mail.gmail.com>
On Fri, 11 Jan 2008 04:47:44 -0500
"Mike Frysinger" <vapier.adi@gmail.com> wrote:
> Cliff should be able to enumerate the cards he has tested and the
> issues he's run into. i'll see if i cant get more in depth
> information from the hardware guys beyond the documentation on the sdh
> already available in the hardware manual (which i'm guessing has not
> been enough to appease you).
>
Great. And you're right in that the spec did not give any indication that MMC shouldn't work.
I did notice one thing though. The pull-ups and pull-downs seem to be controllable. If I remember correctly, DAT3 needs to have a controller-side pull-up for MMC cards. And the docs said the default was not to provide that (in order to use the internal pull-up that most, but not all, SD cards have for detection). Might be something to look at if you haven't already.
Rgds
--
-- Pierre Ossman
Linux kernel, MMC maintainer http://www.kernel.org
PulseAudio, core developer http://pulseaudio.org
rdesktop, core developer http://www.rdesktop.org
next prev parent reply other threads:[~2008-01-11 10:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-08 18:29 Mike Frysinger
2008-01-08 19:21 ` Pierre Ossman
2008-01-08 19:40 ` Mike Frysinger
2008-01-08 20:49 ` Pierre Ossman
2008-01-08 21:44 ` Mike Frysinger
2008-01-09 7:21 ` Pierre Ossman
2008-01-09 2:32 ` Bryan Wu
2008-01-09 3:21 ` Cai, Cliff
2008-01-09 7:23 ` Pierre Ossman
2008-01-09 16:45 ` Bryan Wu
2008-01-10 8:54 ` Pierre Ossman
2008-01-10 9:22 ` Bryan Wu
2008-01-10 11:57 ` Pierre Ossman
2008-01-11 6:17 ` Bryan Wu
2008-01-11 6:25 ` Mike Frysinger
2008-01-11 8:40 ` Pierre Ossman
2008-01-11 9:08 ` Mike Frysinger
2008-01-11 9:35 ` Pierre Ossman
2008-01-11 9:47 ` Mike Frysinger
2008-01-11 10:05 ` Pierre Ossman [this message]
2008-01-11 10:22 ` Bryan Wu
2008-01-11 11:18 ` Pierre Ossman
2008-01-11 17:52 ` Robin Getz
2008-01-12 13:02 ` Robin Getz
2008-01-12 15:24 ` Bryan Wu
2008-01-12 15:39 ` Pierre Ossman
2008-01-09 4:23 ` Bryan Wu
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