Re: [PATCH v3 5/7] net: dsa: mediatek: support MDIO switch downstream of MMIO switch

[Andrew Lunn]

On Wed, Oct 28, 2026 at 01:13:15AM +0000, Caleb James DeLisle wrote:
> The MT7530 / MT7531 can connect via either MDIO or MMIO. In MMIO mode
> the switch provides its own MDIO bus which connects to its integrated
> PHYs, but also can be connected to other things, such as another
> switch.
> 
> If the MDIO bus contains another switch, then the upstream switch
> will register but it will not setup the DSA tree because the
> downstream switch is missing. Without the complete DSA tree,
> mt753x_setup() will not be called on the switch and therefore
> mt7530_setup_mdio() is never called so the downstream switch never
> registers.
> 
> Update mt7530_setup_mdio() so that it can be called multiple times,
> export the symbol, and call it again after dsa_register_switch()
> from mt7988_probe().

I would suggest just moving it to probe. Don't also have it in setup.
KISS.

	Andrew