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
