From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 2/2] mmc: Skip changing bus width for MMC cards earlier than version 4.0
Date: Tue, 13 Jan 2015 10:22:57 +0000 [thread overview]
Message-ID: <1421144577.2694.11.camel@synopsys.com> (raw)
In-Reply-To: <1419524545-18136-3-git-send-email-andrew_gabbasov@mentor.com>
Hi Pantelis,
On Thu, 2014-12-25 at 10:22 -0600, Andrew Gabbasov wrote:
> Wider bus widths (larger than default 1 bit) appeared in MMC standard
> version 4.0. So, for MMC cards of any earlier version trying to change
> the bus width (including ext_csd comparison) does not make any sense.
> It may work incorrectly and at least cause unnecessary timeouts.
> So, just skip the entire bus width related activity for earlier versions.
>
> Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
> Tested-by: Alexey Brodkin <abrodkin@synopsys.com>
This change fixes regression introduced in
https://patchwork.ozlabs.org/patch/416442/ for MMC cards.
Please consider applying if you don't have any objections.
Regards,
Alexey
next prev parent reply other threads:[~2015-01-13 10:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-25 16:22 [U-Boot] [PATCH 0/2] Fix some corner cases in bus width setting Andrew Gabbasov
2014-12-25 16:22 ` [U-Boot] [PATCH 1/2] mmc: Avoid redundant switching to 1-bit bus width for MMC cards Andrew Gabbasov
2015-01-19 14:42 ` Pantelis Antoniou
2014-12-25 16:22 ` [U-Boot] [PATCH 2/2] mmc: Skip changing bus width for MMC cards earlier than version 4.0 Andrew Gabbasov
2015-01-13 10:22 ` Alexey Brodkin [this message]
2015-01-19 14:45 ` Pantelis Antoniou
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