Re: [PATCH 2/2] dt-bindings: net: dsa: qca8k: Add PORT0_PAD_CTRL properties

[Andrew Lunn]

On Sat, Jul 18, 2020 at 02:20:11PM +0100, Russell King - ARM Linux admin wrote:
> On Fri, Jul 17, 2020 at 10:44:19PM +0200, John Crispin wrote:
> > in regards to the sgmii clk skew. I never understood the electrics fully I
> > am afraid, but without the patch it simply does not work. my eletcric foo is
> > unfortunately is not sufficient to understand the "whys" I am afraid.
> 
> Do you happen to know what frequency the clock is?  Is it 1.25GHz or
> 625MHz?  It sounds like it may be 1.25GHz if the edge is important.

I'm also a bit clueless when it comes to these systems.

I thought the clock was embedded into the SERDES signal? You recover
it from the signal?

Florian, does the switch have a separate clock input/output?

   Andrew