Re: [PATCH v3 6/7] dt-bindings: net: dsa: mediatek,mt7530: add econet,en751221

[Andrew Lunn]

On Wed, Oct 28, 2026 at 01:13:16AM +0000, Caleb James DeLisle wrote:
> The EcoNet EN751221 MIPS SoC integrates an MT7530 switch memory-mapped
> in the SoC register space. It is similar to the econet,en7528-switch
> except that ports 0..3 are 10/100 only, port 4 has a gigabit PHY, and
> port 5 has no PHY, but is in some implementations connected to a
> downstream MT7530 multi-chip module via a TRGMII link.
> 
> The downstream MT7530 is similar to the MT7621 multi-chip module and
> has all gigabit ports.
> 
> Add the econet,en751221-switch compatible with the same constraints as
> the other built-in switches and also add the econet,en751221-gswitch
> multi-chip-module switch whose port 6 is configured as a DSA link port.

Is there a use case of the econet,en751221-switch not in pass through
mode? This is where you could have a different dsa_switch_ops
structure, which probably makes the changes less invasive.

Even if there is a use case for not pass through, you can still look
for the property in probe, and decide which of two different
dsa_switch_ops to pass to dsa_register_switch.

	   Andrew