[PATCH v6 2/3] netdev/of/phy: Add MDIO bus multiplexer support.
David Miller
davem at davemloft.net
Tue May 8 12:58:53 EST 2012
From: David Daney <ddaney.cavm at gmail.com>
Date: Wed, 2 May 2012 18:16:38 -0700
> From: David Daney <david.daney at cavium.com>
>
> This patch adds a somewhat generic framework for MDIO bus
> multiplexers. It is modeled on the I2C multiplexer.
>
> The multiplexer is needed if there are multiple PHYs with the same
> address connected to the same MDIO bus adepter, or if there is
> insufficient electrical drive capability for all the connected PHY
> devices.
>
> Conceptually it could look something like this:
...
> This framework configures the bus topology from device tree data. The
> mechanics of switching the multiplexer is left to device specific
> drivers.
>
> The follow-on patch contains a multiplexer driven by GPIO lines.
>
> Signed-off-by: David Daney <david.daney at cavium.com>
Applied.
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