From: James Bottomley <James.Bottomley@SteelEye.com>
To: Stephan Rattai <srattai@zmnh.uni-hamburg.de>
Cc: linux-scsi@vger.kernel.org
Subject: Re: aic79xx
Date: Sun, 26 Feb 2006 09:51:47 -0600 [thread overview]
Message-ID: <1140969107.3692.2.camel@mulgrave.il.steeleye.com> (raw)
In-Reply-To: <200602221839.09470.srattai@zmnh.uni-hamburg.de>
On Wed, 2006-02-22 at 18:39 +0100, Stephan Rattai wrote:
> cat /sys/class/spi_transport/target1\:0\:1/min_period
> 6.25
>
> 2.6.16-rc3 ? Whatever causes this behaviour must have been introduced in
> 2.6.14. The cat above is taken from 2.6.15.4. The output from 2.6.14 is the
> same (as is the output from /proc/scsi/aic79xx/1), 2.6.16-rc4 dito. 2.6.13
> was working as expected.
OK, I'm afraid this is a bit more serious than I thought. Apparently
the aic7xxx code that pulls the settings out of the seeprom didn't get
ported over to the aic79xx driver.
Temporarily, to achive what you want, you can just do
echo 12.5 > /sys/class/spi_transport/target1\:0\:1/min_period
echo 1 > /sys/class/spi_transport/target1\:0\:1/revalidate
and that should bring the speed down to U160.
I'll see what it will take to get the seeprom functions ported, but they
probably won't make 2.6.16.
James
next prev parent reply other threads:[~2006-02-26 15:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-22 15:18 aic79xx Stephan Rattai
2006-02-22 17:14 ` aic79xx James Bottomley
2006-02-22 17:39 ` aic79xx Stephan Rattai
2006-02-26 15:51 ` James Bottomley [this message]
2006-02-27 12:53 ` aic79xx Stephan Rattai
2006-02-27 20:20 ` aic79xx Stephen Degler
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