About frequency of USB2.0

Hi,

My customer tries to connect OMAP-L138 and PC using USB2.0.
USB2.0 reference clock will be sourced from the AUXCLK of the system PLL.

Question is following;
1. Would USB0_REFCLKIN pin is opened OK? 
2. In my customers use case, any USBCLK OK is in 12,24,48,19.2,38,4,13,26,20,40MHz?
    Please tell me if there are any notes.

Best Regards,
Miyashiro