On Tue, Jul 30, 2019 at 12:45:17PM +0300, Claudiu Manoil wrote: > ENETC ports can manage the MDIO bus via local register > interface. However there's also a centralized way > to manage the MDIO bus, via the MDIO PCIe endpoint > device integrated by the same root complex that also > integrates the ENETC ports (eth controllers). > > Depending on board design and use case, centralized > access to MDIO may be better than using local ENETC > port registers. For instance, on the LS1028A QDS board > where MDIO muxing is required. Also, the LS1028A on-chip > switch doesn't have a local MDIO register interface. > > The current patch registers the above PCIe endpoint as a > separate MDIO bus and provides a driver for it by re-using > the code used for local MDIO access. It also allows the > ENETC port PHYs to be managed by this driver if the local > "mdio" node is missing from the ENETC port node. > > Signed-off-by: Claudiu Manoil <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]> Andrew
