# Re: \[PATCH v6 0/3\] netdev/of/phy: MDIO bus multiplexer support.

- From: David Daney \<hidden\>
- Date: 2012-05-24 19:19:53 
- List: netdev
- Page: https://ratatoskr.run/netdev/2012/05/8060070
- Thread: https://ratatoskr.run/linux-devicetree/2012/05/8060070/t.md

```text
On 05/24/2012 12:03 PM, Timur Tabi wrote:
> David Daney wrote:
>
>> Well, the MDIO bus must have an associated device tree node.
>>
>> For my OCTEON code, the MDIO bus device is created as a result of the
>> call to of_platform_bus_probe(), which takes care of filling in all the
>> device tree nodes of the devices it finds and creates.
>
> Ok, let me give you some background.  We actually already have MDIO muxing
> code in-house, but it's different from yours.  So now I'm rewriting it to
> use your design instead.
>
> So our current code looks for "virtual MDIO nodes", and we call
> mdiobus_alloc() and then of_mdiobus_register().  I think this is what I'm
> missing now.
>
> I just don't know what to do next.

You will have to debug it and find out why the device match is failing, then fix it.

David Daney
```