From: Andrew Lunn
Date: Mon, 11 Apr 2016 21:40:05 +0200
> MDIO devices can be stacked upon each other. The current code supports
> two levels, which until recently has been enough for a DSA mdio bus on
> top of another bus. Now we have hardware which has an MDIO mux in the
> middle.
>
> Define a
MDIO devices can be stacked upon each other. The current code supports
two levels, which until recently has been enough for a DSA mdio bus on
top of another bus. Now we have hardware which has an MDIO mux in the
middle.
Define an MDIO MUTEX class with three levels.
Signed-off-by: Andrew Lunn
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