How to configure BBB as an SPI slave?

Hi everyone,

I’ve been looking the whole day for a clear way to configure BBB as an SPI slave but I couldn’t find any.
I read all the threads in this group but I’m still can’t get it to work .
Currently, I can use BBB as an SPI master and another board is a slave but I need to make them change the roles.

Following is the output of uname -a command:

Linux beaglebone 4.4.80-ti-r116 #1 SMP Wed Aug 9 13:18:17 UTC 2017 armv7l GNU/Linux


Any help or link is appreciated.
Thank you

Linux does not currently support SPI slave mode.