> Although, there is no specific errata available for adding fixup > specific to lan78xx USB dongle, we have added the fixup for handing > specific configurations to ensure the PHY operates correctly with the > MAC. In this case while transmitting from MAC to PHY the device does > not add the delay locally at its TX input pins. It expects the TXC > delay to be provided by on-chip MAC. Since the delay calculated in this > case is specific to the lan78xx USB dongle it is not possible to use > this fixup for interfacing with generic MAC. Have you tried PHY_INTERFACE_MODE_RGMII_TXID when connecting to the PHY? The four PHY_INTERFACE_MODE_RGMII_* values are the official way to ask the PHY to insert delays, or not. If that is all you are doing, i don't think you need these fixups at all. > > Please give me a details explanation why this fixup will not be > > applied to other instances of this PHY in the system. > > As stated above, the TXC delay calculated for the PHY is specific to > the lan78xx on-chip MAC. This delay ensures that both the phy and MAC > clock delay timing is met. Any other MACs connected will need a > different delay values to be synchronized with MAC and hence these > instances will get failed. You did not answer my question. Show me the code path which prevents this being applied to other PHYs. Is there a comparison to netdev somewhere when applying the fixup? Give me the file:line number. Andrew
