The device tree entry for pin multiplexing the GEM0 Ethernet is as above. As per the Xilinx pinctrl binding documentation, I see four MDIO groups, mdio0_0_grp, mdio1_0_grp, mdio2_0_grp and mdio3_0_grp. Based on information on 1039 of the ZYNQMP TRM and this pinctrl binding, I expect the correct configuration for MDIO to be mdio0_0_grp, however, doing this and the driver crashes. If I keep mdio3_0_grp, it does not. I expect mdio0_0_grp to be correct, but, cannot understand the driver crash if I use mdio0_0_grp. I have attached a screenshot of the crash.
Can someone help me with the correct configuration if it is wrong and if configuration is correct, what else might be the problem? Currently, using kernel build with Yocto release v2018.2.