Re: [PATCH v5 2/3] netdev/of/phy: Add MDIO bus multiplexer support.

[David Miller <davem@davemloft.net>]

From: David Daney <ddaney.cavm@gmail.com>
Date: Wed, 18 Apr 2012 16:20:53 -0700

> +config MDIO_BUS_MUX
> +     tristate
> +     help
> +       This module provides a driver framework for MDIO bus
> +       multiplexers which connect one of several child MDIO busses
> +       to a parent bus.  Switching between child busses is done by
> +       device specific drivers.
> +

This driver uses OF and OF_MDIO, and therefore need dependencies upon
them.  Otherwise it can be enabled in configurations which will result
in build failures.