Hi, This series adds support for dynamically switching between 1Gbps and 2.5Gbps networking for the Marvell Armada 38x SoCs, tested on Armada 388 on the Clearfog platform. This is necessary to be able to connect (eg) a Clearfog platform with a Macchiatobin platform via the SFP sockets, as Clearfog currently only supports 1Gbps networking via the SFP socket and Macchiatobin defaults to 2.5Gbps when using Fiberchannel SFPs. In order to allow dynamic switching, we need to implement a common phy driver to switch the ethernet serdes lane speed - 2.5Gbps is just 1Gbps up-clocked by 2.5x. We implement a simple comphy driver to achieve this, which only supports networking. With this, we are able to support both Fiberchannel SFPs operating at 2.5Gbps or 1Gbps, and 1G ethernet SFPs plugged into the Clearfog platform, dynamically selecting according to the SFPs abilities. I'm aware of the proposed changes to the PHY layer, changing phy_set_mode() to take the ethernet phy interface type, hence why this is RFC - there's also the question about how this will be merged. This series is currently based on 4.20-rc1, but will likely need to be rebased when the PHY layer changes hit. .../bindings/net/marvell-armada-370-neta.txt | 2 +- .../bindings/phy/phy-armada38x-comphy.txt | 40 ++++ arch/arm/boot/dts/armada-388-clearfog.dtsi | 2 + arch/arm/boot/dts/armada-38x.dtsi | 37 ++++ drivers/net/ethernet/marvell/mvneta.c | 58 ++++- drivers/phy/marvell/Kconfig | 10 + drivers/phy/marvell/Makefile | 1 + drivers/phy/marvell/phy-armada38x-comphy.c | 236 +++++++++++++++++++++ 8 files changed, 378 insertions(+), 8 deletions(-) create mode 100644 Documentation/devicetree/bindings/phy/phy-armada38x-comphy.txt create mode 100644 drivers/phy/marvell/phy-armada38x-comphy.c -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up
