Apalis iMX6Q SPI Slave Mode?

Can the Apalis iMX6 quad be used as a SPI slave? I have a cellular module that is a peripheral device that I want to interface with, but it is configured as a SPI master.

IMX6 SPI controller supports both modes Master and Slave. Software support of slave is implemented only starting with 4.15 mainline kernel. Please check some details here.