[U-Boot] SPI Slave mode Device Tree

Hi,

While going over device tree binding documentation I came across this:

/doc/device-tree-bindins/spi/spi-bus.txt: "This binding does not describe SPI controllers in slave mode."

Does this mean I cannot use device tree in case I want to configure the controller as SPI slave? If yes, please suggest how can I configure it as a SPI slave. I'm using a imx6solo based custom board.

Best regards,

Shreyank Amartya RBEI/ESD2