RE: [PATCH v3 net-next 5/6] net: enetc: add basic support for the ENETC with pseudo MAC for i.MX94

[Claudiu Manoil]

> -----Original Message-----
> From: Wei Fang <wei.fang@xxxxxxx>
> Sent: Monday, October 27, 2025 3:45 AM
[...]
> Subject: [PATCH v3 net-next 5/6] net: enetc: add basic support for the ENETC
> with pseudo MAC for i.MX94
> 
> The ENETC with pseudo MAC is an internal port which connects to the CPU
> port of the switch. The switch CPU/host ENETC is fully integrated with
> the switch and does not require a back-to-back MAC, instead a light
> weight "pseudo MAC" provides the delineation between switch and ENETC.
> This translates to lower power (less logic and memory) and lower delay
> (as there is no serialization delay across this link).
> 
> Different from the standalone ENETC which is used as the external port,
> the internal ENETC has a different PCIe device ID, and it does not have
> Ethernet MAC port registers, instead, it has a small number of pseudo
> MAC port registers, so some features are not supported by pseudo MAC,
> such as loopback, half duplex, one-step timestamping and so on.
> 
> Therefore, the configuration of this internal ENETC is also somewhat
> different from that of the standalone ENETC. So add the basic support
> for ENETC with pseudo MAC. More supports will be added in the future.
> 
> Signed-off-by: Wei Fang <wei.fang@xxxxxxx>

Reviewed-by: Claudiu Manoil <claudiu.manoil@xxxxxxx>