From: jakob@viketoft.se (Jakob Viketoft)
To: linux-arm-kernel@lists.infradead.org
Subject: SPI trouble on Colibri 270 (PXA)...
Date: Wed, 21 Apr 2010 14:47:16 +0200 [thread overview]
Message-ID: <4BCEF3D4.2030704@viketoft.se> (raw)
In-Reply-To: <p2y56d259a01004210411ie5f4b723n6cfd25e96333813@mail.gmail.com>
Martin Guy wrote:
> On 4/21/10, Eric Miao <eric.y.miao@gmail.com> wrote:
>
>> I thought we were talking about SPI?
>
> We are. It affects boards that have a single SD/MMC card on the SPI
> bus and use SFRMOUT as the chip select line, which impacts how the SPI
> driver needs to handle multi-part messages without dropping CS between
> transfers
Does this mean that this is a know issue with the pxa2xx spi driver? At
the moment I'm rather pressed for time and have instead opted for
compressing the two transfers (read command and actual read) into one.
There is a slight memory overhead in writing, but nothing that will
impact our system...
/Jakob
next prev parent reply other threads:[~2010-04-21 12:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-20 11:58 SPI trouble on Colibri 270 (PXA) Jakob Viketoft
2010-04-20 13:14 ` Eric Miao
2010-04-20 15:20 ` Jakob Viketoft
2010-04-21 9:44 ` Marek Vasut
2010-04-21 10:47 ` Eric Miao
2010-04-21 11:11 ` Martin Guy
2010-04-21 11:42 ` Eric Miao
2010-04-21 11:49 ` Martin Guy
2010-04-21 12:47 ` Jakob Viketoft [this message]
2010-04-21 14:53 ` Martin Guy
[not found] ` <g2xf17812d71004210607n4f3d82f2m4712d3bb97ef4924@mail.gmail.com>
2010-04-22 14:36 ` Jakob Viketoft
2010-04-23 16:55 ` Vernon Sauder
2010-04-23 19:57 ` Jakob Viketoft
2010-04-23 23:40 ` Eric Miao
2010-04-21 12:12 ` Marek Vasut
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