[U-Boot-Users] dynamic setting of CONFIG_SYS_CLK_FREQ

I was wondering if there where an examples in the current u-boot source tree in which CONFIG_SYS_CLK_FREQ was determined dynamically. I have a system in which I can read a config register on the board to let me know if the CONFIG_SYS_CLK_FREQ is 66Mhz or 33Mhz. I was hoping to have the 16550 uart (and anything else) that needed CONFIG_SYS_CLK_FREQ grab it from a variable instead.

This is on an MPC85xx platform system.

thanks

- Kumar