On 02/20/2013 09:51 PM, anish singh wrote:

quoted

I intend to embed the BB in our new product if I can solve a small
problem.  The BB has 2 SPI ports, 1 with 1 chip select and the other
with 2.  Only one port is supported in the standard kernel.  I found
some info that guided me into activating the new port and having all
three devices enumerated in /dev.

Which three devices?

Not that it matters but a 1 MS/S A/D converter, a DDS synthesizer and a
bit of an FPGA that fans out one word of data to 16 control lines.

quoted

What I have not yet been able to do is figure out how to enable that
second chip select line.  So my first question is, where do I start

What does this second chip select line does?

Pick one of the three functions above.

quoted

looking for the existing code?  I'm hoping that I'll be lucky enough to
reuse that code, changing a bit or two in the CPU register.

Can you show us the schematic?

No, it's still just a pencil sketch.  But I don't need a completed
schematic to know that I need 3 SPI channels and the Bone only has one
enabled by default.  I've enabled the other port.  Now I need to figure
out how to enable that port's second chip select line.  That was my
question.  Any suggestions?

John


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