Freescale MPC8313 & SPI

Freescale MPC8313 & SPI

[Mark Bishop]

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.

Re: Freescale MPC8313 & SPI

[Kumar Gala]

On Feb 24, 2009, at 7:19 PM, Mark Bishop wrote:

> 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.

This question might be better asked on the spi-devel list.

https://lists.sourceforge.net/lists/listinfo/spi-devel-general

- k