dynamic control of PINMUX registers between Hi-Z and any valid pin function

Hi, 

I have a question about the dynamic control of PINMUX registers between Hi-Z and any valid pin function on C674x platform. 

One of my customers wants to use some GPIOs as an output or Hi-Z, and they switch the pin feature dynamically in there system.
Please note, during Hi-Z pin condition, 1.485V～1.815V can be served to GPIO pin.

So, I suggested them to control PINMUX registers dynamically when the pins are required to be Hi-Z.

But now I'm wondering if this could be really allowed in the device HW point of view...
Could you please let me know if this can be TI's recommended solution to realize the customer's requirement ?

Best Regards,
Kawada