[U-Boot] baud rate of the rockchip uart

Hello, I am trying to setup the baud rate of the rockchip uart from the file => arch/arm/mach-rockchip/rk3328-board-tpl.c line 59 -> 63, the baud rate is at insane 1,500,000 bps... that speed it too fast for small computers using serial port to communicate with the rock64 SBC... I would like to set the baud rate at more "sane" values like 9600, 19200... or even 115200 bps

Can some one point me what values must be written to the lcr and rbr of the chip to make it happen???

Thanks in advance...

Sergio