Re: [PATCH net-next v2 07/13] net: dsa: realtek: add new mdio interface for drivers

quoted

+     /* Write Start command to register 29 */
+     bus->write(bus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);

I'm curious where these START commands came from because I cannot find
an anlogous procedure in the Realtek driver dump I have. Did you figure
this out empirically? Does it not work without? Same goes for the other
ones downstairs.

It works without the MDC_MDIO_START_REG. I'm also curious that it
really does. It is present in uboot driver and OpenWrt driver. That
MDC_MDIO_START_REG is even defined in Realtek rtl8637c, but not used.
I think it might be something that an old family (rtl8637b) required
but not newer ones.

I'll drop it.