netdev - Re: [Pasemi-linux] I2C MDIO support for pasemi

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Date:	Fri, 07 Mar 2008 13:28:11 -0600
From:	Nathaniel Case <ncase@...-inc.com>
To:	Olof Johansson <olof@...om.net>
Cc:	netdev@...r.kernel.org, pasemi-linux@...abs.org,
	afleming@...escale.com
Subject: Re: [Pasemi-linux] I2C MDIO support for pasemi_mac driver

On Fri, 2008-03-07 at 12:48 -0600, Olof Johansson wrote:
> On second thought, it might be a better idea to change from BUS:ID to
> BUSTYPE:BUS:ID in phylib, to separate the namespaces.
> 
> That, plus a way to get to an i2c bus number from a device tree node,
> and we should be all set. That might be tricker though.

I like this idea, since it would eliminate the need for the MAC driver
to decide policy on a "global" MDIO bus numbering scheme.  I was also
trying to make it compatible with the case (however unlikely) of having
both an SMBus PHY and a bit-banged MDIO PHY.

For getting the I2C bus number from a device tree node, I've just been
parsing the node->full_name for the number following the i2c@...XXX with
an ugly string parsing function (xes_of_get_node_loc() in one of the
older patches I sent you).

- Nate Case <ncase@...-inc.com>

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