On Wed, Jul 3, 2024 at 4:39 AM Chris Packham
[off-list ref] wrote:

I've just found is that in theory the RTL930x
supports a CPU disabled mode where you do connect it to an external CPU
and the data travels over SGMII like you'd get with a traditional DSA
design.

The Vitesse VSC73xx has this as well, it has an internal Intel 8051 (!)
CPU so the switch can be used stand-alone with a smallish PROM for
a random switchbox, or it can be used over SPI or memory-mapped from
another CPU as a DSA switch.

Yours,
Linus Walleij