On Fri, Aug 23, 2024 at 10:33 AM Robert Nelson <robertcnelson@xxxxxxxxx> wrote:
>
> > > +
> > > +&cpsw3g {
> > > + pinctrl-names = "default";
> > > + pinctrl-0 = <&rgmii1_pins_default>, <&gbe_pmx_obsclk>;
> >
> > Why do you need OBSCLK for Ethernet MAC?
> > The OBSCLK is connected to the Ethernet PHY via C406 which is not even populated.
> > It seems that the PHY is clocked by a crystal oscillator X5 so doesn't really
> > need OBSCLK in the stock configuration?
>
> Ah crap, I'll take a look at this... I bet it's left over from the
> first pcb, (all my first rev pcb's are now locked up so i don't use
> them anymore).. Seeed/BeagleBoard was playing it safe and designing
> in both options.. Once the internal clocks were verified newer
> revisions removed the external clock.
>
> Yeah, I'm pretty sure final production boards removed every external
> clock option.
Yeap, external clock is the default for all production boards, i
removed this internal clock configuration.
Thanks
--
Robert Nelson
https://rcn-ee.com/
