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This core can be used in all three modes of operation(10/100/1000 Mb/s). The Management Data Input/Output (MDIO) interface is used to configure the Speed of operation. This core can switch dynamically between the three Different speed modes by configuring the conveter register through mdio write. The conveter sits b/w the MAC and external phy like below MACB <==> GMII2RGMII <==> RGMII_PHY MDIO <========> GMII2RGMII MCAB <=======> <========> RGMII Using MAC MDIO bus we can access both the converter and the external PHY. We need to program the line speed of the converter during run time based On the external phy negotiated speed. This patch series does the below ---> Add mask for Control register 10Mbps speed. ---> Add support for xilinx gmiitorgmii converter. Kedareswara rao Appana (3): net: Add mask for Control register 10Mbps speed Documentation: DT: net: Add Xilinx gmiitorgmii converter device tree binding documentation net: phy: Add gmiitorgmii converter support .../devicetree/bindings/net/xilinx_gmii2rgmii.txt | 38 +++++++ drivers/net/phy/Kconfig | 8 ++ drivers/net/phy/Makefile | 1 + drivers/net/phy/xilinx_gmii2rgmii.c | 121 +++++++++++++++++++++ include/uapi/linux/mii.h | 1 + 5 files changed, 169 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/xilinx_gmii2rgmii.txt create mode 100644 drivers/net/phy/xilinx_gmii2rgmii.c -- 2.1.2