<p><span class="h-card" translate="no"><a href="https://types.pl/@wren6991" class="u-url mention">@<span>wren6991</span></a></span> I mean I've seen RGMII and SGMII on the same IO buffers. It's plausible.</p><p>But you definitely wouldn't want to lay out a board for both... having e.g. SCK and CS# routed as a differential pair would be a nightmare if you were doing SPI mode.</p>
