How to communicate using SPI-slave interface on TK1

We have a scenario where our TK1 custom board is connected with another Linux based board via SPI interface. Our TK1 custom board is acting as SPI-slave and other Linux machine as SPI-master. I am able to find sample C userspace application to Tx & Rx data via SPI-master end but how I can do the same on TK1 SPI-slave end? I am not able to find any documentation to change kernel config & device tree to enable SPI slave and sample application for this purpose.

P.S: I seen another thread which discusses running SPI-slave on TX1 but it didn’t seem to apply for my scenario

Sorry to tell. TK1 not implement slave mode kernel driver.