W7500S2E-C1 connected to Switch-IC KSZ8863MLL

I’m interested in using the W7500S2E-C1 together with the Micrel KSZ8863MLL within my own board. The KSZ8863MLL is intended to provide a 3-port switch functionality to allow daisy chaining of several boards.
The primary function is similar to the W7500S2E-R1 - a serial (UART) to Ethernet gateway without additional protocol.

Can I use the W7500S2E-C1 with the original firmware or is an extra support for the switch chip required?
If modifications are required at the firmware, is it possible to get an adapted version?