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045d05018a
At the moment, mEMACs are configured almost completely based on the phy-connection-type. That is, if the phy interface is RGMII, it assumed that RGMII is supported. For some interfaces, it is assumed that the RCW/bootloader has set up the SerDes properly. This is generally OK, but restricts runtime reconfiguration. The actual link state is never reported. To address these shortcomings, the driver will need additional information. First, it needs to know how to access the PCS/PMAs (in order to configure them and get the link status). The SGMII PCS/PMA is the only currently-described PCS/PMA. Add the XFI and QSGMII PCS/PMAs as well. The XFI (and 10GBASE-KR) PCS/PMA is a c45 "phy" which sits on the same MDIO bus as SGMII PCS/PMA. By default they will have conflicting addresses, but they are also not enabled at the same time by default. Therefore, we can let the XFI PCS/PMA be the default when phy-connection-type is xgmii. This will allow for backwards-compatibility. QSGMII, however, cannot work with the current binding. This is because the QSGMII PCS/PMAs are only present on one MAC's MDIO bus. At the moment this is worked around by having every MAC write to the PCS/PMA addresses (without checking if they are present). This only works if each MAC has the same configuration, and only if we don't need to know the status. Because the QSGMII PCS/PMA will typically be located on a different MDIO bus than the MAC's SGMII PCS/PMA, there is no fallback for the QSGMII PCS/PMA. Signed-off-by: Sean Anderson <sean.anderson@seco.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> |
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