Re: [RFC PATCH v2 net-next 2/8] net: dsa: ocelot: felix: move MDIO access to a common location

[Vladimir Oltean]

On Sat, Jul 10, 2021 at 12:25:56PM -0700, Colin Foster wrote:
> Indirect MDIO access is a feature that doesn't need to be specific to the
> Seville driver. Separate the feature to a common file so it can be shared.
> 
> Signed-off-by: Colin Foster <colin.foster@xxxxxxxxxxxxxxxx>
> ---

In fact, this same piece of hardware has a dedicated driver inside
drivers/net/mdio/mdio-mscc-miim.c. The only problem is that it doesn't
work with regmap, and especially not with a caller-supplied regmap. I
was too lazy to do that, but it is probably what should have been done.

By comparison, felix_vsc9959.c was coded up to work with an internal
MDIO bus whose ops are implemented by another driver (enetc_mdio). Maybe
you could take that as an example and have mdio-mscc-miim.c drive both
seville and ocelot.