You mean you designed and fabbed your own board? Check out the serial console output for SERIAL1. If you’re getting an unending series of CCCCCC… then you’re good. In that case you need to make your own image with a custom uboot to recognize the device. Or you can program the EEPROM. For me it was easier to make a custom uboot since I made thousands.
Octavo has a nice description of how to do this as an app note on their website.