1* System Management Interface (SMI) / MDIO 2 3Properties: 4- compatible: One of: 5 6 "cavium,octeon-3860-mdio": Compatibility with all cn3XXX, cn5XXX 7 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 Nexus 34 35 Several mdio buses may be gathered as children of a single PCI 36 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