How does U-boot set system frequency

[david8274]

Hi All,

As U-boot first run, I imagine it will set system frequency at an early stage. Could anyone point me to where U-boot does it? I tried to look for it but couldn't find it.

Thanks,
Wei

[WarheadsSE]

Generally speaking, it is very dependent on the SoC, and happens in the SPL most of the time (early u-boot, or even pre- u-boot).