RK3588 CPLL question

[Alexander Shiyan]

Hello.

> On Wed, 24 Sep 2025 16:05:02 +0300, Alexander Shiyan wrote:
> > There's still no successful result with properly configuring the CPLL
> > for the RK3588.
> > Without it, kernel startup becomes pointless, as important frequencies
> > for network
> > interfaces, and likely some others, remain half the speed required for
> > system operation.
> > The CPLL in U-Boot is programmed for a frequency of 1500 MHz, and it
> > works there,
> > but in barebox these actions do not bring success.
...
> > I don't know what else to try...
> > Has anyone had any successful experience running a barebox for RK3588
> > with working network interfaces?
>
> I have barebox running with working network interfaces on a Radxa ROCK
> 5T board. I'm not familiar with the clock tree, yet, but on my system,
> the CPLL is also set to 750 MHz and child clocks seem to be running at
> half their rate.

I think REFCLKO25M_ETHx_OUT is not used there.