Hi Tobias,

On 3/21/2020 1:24 PM, Tobias Waldekranz wrote:

An MDIO controller present on development boards for Marvell switches
from the Link Street (88E6xxx) family.

Using this module, you can use the following setup as a development
platform for switchdev and DSA related work.

   .-------.      .-----------------.
   |      USB----USB                |
   |  SoC  |      |  88E6390X-DB  ETH1-10
   |      ETH----ETH0               |
   '-------'      '-----------------'

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
---

[snip]

+config MDIO_MVUSB
+	tristate "Marvell USB to MDIO Adapter"
+	depends on OF_MDIO && USB

You could drop OF_MDIO here since of_mdiobus_register() does default to
mdiobus_register() when CONFIG_OF is disabled. Other than that, LGTM!

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian