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1* System Management Interface (SMI) / MDIO2 3Properties:4- compatible: One of:5 6 "cavium,octeon-3860-mdio": Compatibility with all cn3XXX, cn5XXX7 and cn6XXX SOCs.8 9 "cavium,thunder-8890-mdio": Compatibility with all cn8XXX SOCs.10 11- reg: The base address of the MDIO bus controller register bank.12 13- #address-cells: Must be <1>.14 15- #size-cells: Must be <0>. MDIO addresses have no size component.16 17Typically an MDIO bus might have several children.18 19Example:20 mdio@1180000001800 {21 compatible = "cavium,octeon-3860-mdio";22 #address-cells = <1>;23 #size-cells = <0>;24 reg = <0x11800 0x00001800 0x0 0x40>;25 26 ethernet-phy@0 {27 ...28 reg = <0>;29 };30 };31 32 33* System Management Interface (SMI) / MDIO Nexus34 35 Several mdio buses may be gathered as children of a single PCI36 device, this PCI device is the nexus of the buses.37 38Properties:39 40- compatible: "cavium,thunder-8890-mdio-nexus";41 42- reg: The PCI device and function numbers of the nexus device.43 44- #address-cells: Must be <2>.45 46- #size-cells: Must be <2>.47 48- ranges: As needed for mapping of the MDIO bus device registers.49 50- assigned-addresses: As needed for mapping of the MDIO bus device registers.51 52Example:53 54 mdio-nexus@1,3 {55 compatible = "cavium,thunder-8890-mdio-nexus";56 #address-cells = <2>;57 #size-cells = <2>;58 reg = <0x0b00 0 0 0 0>; /* DEVFN = 0x0b (1:3) */59 assigned-addresses = <0x03000000 0x87e0 0x05000000 0x0 0x800000>;60 ranges = <0x87e0 0x05000000 0x03000000 0x87e0 0x05000000 0x0 0x800000>;61 62 mdio0@87e0,05003800 {63 compatible = "cavium,thunder-8890-mdio";64 #address-cells = <1>;65 #size-cells = <0>;66 reg = <0x87e0 0x05003800 0x0 0x30>;67 68 ethernet-phy@0 {69 ...70 reg = <0>;71 };72 };73 mdio0@87e0,05003880 {74 compatible = "cavium,thunder-8890-mdio";75 #address-cells = <1>;76 #size-cells = <0>;77 reg = <0x87e0 0x05003880 0x0 0x30>;78 79 ethernet-phy@0 {80 ...81 reg = <0>;82 };83 };84 };85