From: Pierre Ossman <drzeus-list@drzeus.cx>
To: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] MMC compatibility fix - GO_IDLE
Date: Wed, 22 Sep 2004 19:45:35 +0200 [thread overview]
Message-ID: <4151BA3F.8040406@drzeus.cx> (raw)
In-Reply-To: <20040922151735.D2347@flint.arm.linux.org.uk>
Russell King wrote:
>On Sat, Sep 18, 2004 at 11:56:42AM +0200, Pierre Ossman wrote:
>
>
>>This patch adds a GO_IDLE before sending a new SEND_OP_COND (as required
>>by MMC standard).
>>
>>
>
>Thanks; I haven't completely vanished off the face of the planet.
>
>
Good to know. You've seemed a bit busy :)
>We already have a function using MMC_GO_IDLE_STATE, so I suggest we
>separate this out. If you need a 1ms delay after sending this, maybe
>the other case also needs this delay as well?
>
>
>
The delay was added just in case. The cards I have here work fine
without it. I just thought adding a small delay might avoid problematic
cards later on. Seems to be a few of those.
>How about this patch?
>
>
>
Looks ok. You sure we don't need to put all cards into an idle state
before issuing a new SEND_OP_COND? I haven't studied how the MMC layer
is called in detail. Can a rescan be done while a card is in a selected
state?
Rgds
Pierre
next prev parent reply other threads:[~2004-09-22 17:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-18 9:56 [PATCH 1/3] MMC compatibility fix - GO_IDLE Pierre Ossman
2004-09-22 14:17 ` Russell King
2004-09-22 17:45 ` Pierre Ossman [this message]
2004-09-22 19:15 ` Russell King
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