tree 07cbf8416be9264469b1819cdeb6eb1f1630a077
parent 46ec104d34cfa9759919e0fc1ea7a8a6ce3e0e98
author Ye Li <ye.li@nxp.com> 1588516874 +0800
committer Stefano Babic <sbabic@denx.de> 1589109888 +0200

net: Add eth phy generic driver for shared MDIO

For dual ethernet controllers, the HW design may connect ETH phys to
one MDIO ports. So two different ethernet drivers have to share MDIO bus.
Since two ethernet drivers are independent, we can't ensure their probe
order.

To resolve this problem, introduce an eth phy generic driver and uclass.

After eth-uclass binds, we search the mdio node and binds the phy node
with the eth-phy-generic driver.

When one eth driver get its phy device, the parent of phy device will
probe prior than phy device. So this ensure the eth driver ownes the
MDIO bus will be probed before using its MDIO.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>