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Date: Tue, 24 Feb 2009 20:19:36 -0500
From: Mark Bishop <mark@bish.net>
To: linuxppc-dev <Linuxppc-dev@ozlabs.org>
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Subject: Freescale MPC8313 & SPI
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I am trying to understand more about how to talk to different spi  
chips using the MPC8313.  The documentation that comes with the  
development board is really lacking and I am relying on the  
/usr/src/linux/Documentaion/spi.  However, I still can't seem to  
answer my questions.

1) Which device do I open up to talk to the bus.  I would use  
something like /dev/ttyS0 for a serial port, and I assume it would be  
/dev/spidev.0 and I would have to make it manually using mknod - but  
what ties the /dev/spidev.0 to the actual chip driver?  Is there  
something I have to do in addition to mknod?

2) I would be looking for a few examples on how to talk to a SPI bus  
as well.  I've looked at spidev_test.c and I would like to see another  
example or two.