Re: aic79xx

[Stephen Degler <stephen@degler.net>]

Hello,

I've observed this problem as well.  I'd be happy to test a patch, or 
derive one if the patch isn't too involved.

skd

James Bottomley wrote:

>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
>
>
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>