Image file Selection

Hi,

I have an i210is chip,i want to make a connection between I210is and ethernet switch with GE PHYs by SGMII interface.

I want to access the registers in Ethernet switch via MDIO interface in I210is.

For this case which image file should i use? if i have to use an KX image file,can i use an KX_SMBus image file?

Regards,

Elango