From: David Brownell <david-b@pacbell.net>
To: "Matt Fleming" <mattjfleming@googlemail.com>
Cc: "Pierre Ossman" <drzeus-mmc@drzeus.cx>, linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH] MMC: Use write timeout value as read from CSR
Date: Mon, 8 Sep 2008 12:18:49 -0700 [thread overview]
Message-ID: <200809081218.49766.david-b@pacbell.net> (raw)
In-Reply-To: <5ff4a1e50809080628i65bd7c7blfac70659a9f9229c@mail.gmail.com>
On Monday 08 September 2008, Matt Fleming wrote:
> Currently, the MMC/SD over SPI code has a hard-coded timeout value of
> 250ms on writes and 100ms on reads. This is correct for SDHC cards
> and is specified in the spec, but it is not correct for MMC/SD cards.
>
> For MMC cards the values that are read from the CSR should be used.
> For SD cards the values from the CSR should be used as long as they
> do not exceed 250ms for writes and 100ms for reads.
>
> Signed-off-by: Matthew Fleming <matthew.fleming@imgtec.com>
OK by me. I was viewing those values as ceilings, such that
waiting too long wouldn't much matter. If there are cases
where the CSR values are larger, they clearly should trump.
next prev parent reply other threads:[~2008-09-08 19:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-01 15:12 Matt Fleming
2008-09-07 10:38 ` Pierre Ossman
2008-09-08 13:28 ` Matt Fleming
2008-09-08 19:18 ` David Brownell [this message]
2008-09-09 7:22 ` Pierre Ossman
2008-09-09 7:34 ` Matt Fleming
2008-09-09 7:44 ` Pierre Ossman
2008-09-09 7:59 ` Matt Fleming
2008-09-09 8:55 ` Pierre Ossman
2008-09-09 9:07 ` Matt Fleming
2008-09-09 9:42 ` Matt Fleming
2008-09-14 13:48 ` Pierre Ossman
[not found] ` <5ff4a1e50809150103v1e250e0x4192e2fe901750a6@mail.gmail.com>
[not found] ` <20080915103821.2b618bba@mjolnir.drzeus.cx>
2008-09-15 9:24 ` Matt Fleming
2008-09-20 11:06 ` Pierre Ossman
2008-09-24 11:16 ` Matt Fleming
2008-10-02 8:26 ` Pierre Ossman
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