Is CAN port reuseable for pixracer?

Dear all,
I intend to reuse the CAN port, which is PD0 and PD1 in pixracer MCU, for other purpose. Except for reconfiguring these two ports as GPIO_OUTPUT|xxxx, are there any other things I need to do, to shutdown or disable the CAN functionality. Do I need to modify Nuttx configs?
Thanks in advance.