I talked with one of the other Apps Engineers, and we dont' have any examples. I am also seeing conflicting information on whether or not it's available. I'm going to search the TI forum and see what they have and I'm going to ask some of our Linux developers if they have any examples we can give you.

adam

Unfortunately, I don't have any good news for you. The software developers here don't have any examples, and I wasn't able to find any on TI's support Forum located here: https://e2e.ti.com/search?q=dM37X%20SPI

I was able to find some other SPI related issues, but nothing specific to slave operation.

adam

Unfortunately, I have more bad news for you. According to one of the developers, there was a statement in the kernel indicating there is no SPI slave mode support.

adam

We did some checking with the mainstream kernel to see if the slave API was implemented. Kernel 4.6 was released yeterday but it doesn't appear to have slave API support yet. See the excerpt from the code:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/spi/Kconfig?id=refs/tags/v4.6#n728


#
# SPI driver configuration
#
# NOTE: the reason this doesn't show SPI slave support is mostly that
# nobody's needed a slave side API yet. The master-role API is not
# fully appropriate there, so it'd need some thought to do well.
#

I talked about this subject in a meeting this morning. Our design services group might be able to develop a SPI slave driver, but it would require a services contract. If you'd like, I could have someone in our sales department contact you.

adam