spidev2 second port working?

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1

Has anyone gotten the second chip select for /dev/spidev2 working? That
is /dev/spidev2.1.

I've been working away on arch/arm/mach-omap2/board-am335xevm.c. I have
patched in the code according to this instruction:

http://theredblacktree.wordpress.com

With some further work I have the 3 ports enumerated in /dev. That is

/dev/spidev1.0
/dev/spidev2.0
/dev/spidev2.1

Both 1.0 and 2.0 are working perfectly. for 2.1 I have data and clock
on the right pins but I can't get a chip select. The Reference manual
says that pin 42 in Mode 2 should be the spi1_cs1 but I haven't figured
out where to program that in yet.

If someone has already figured this out, I'd certainly appreciate the help.

Thanks,
John

2

Hi John,

This should help with your pin muxing of the chip select.

http://www.nathandumont.com/node/250

If it is already muxed correctly then there is a bigger issue at hand.

Regards,
Jack.

3

Thanks Jack, that's good info. However it doesn't solve my problem. In

/sys/kernel/debug/omap_mux

Only entries for SPI0 appear. I need to be working with SPI1.

I think this confirms my previous thought that a kernel mod will be
required. I'm just not advanced enough to figure out where.

John