| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * System Management Interface (SMI) / MDIO |
| 2 | |
| 3 | Properties: |
| 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 | |
| 17 | Typically an MDIO bus might have several children. |
| 18 | |
| 19 | Example: |
| 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 | |
| 38 | Properties: |
| 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 | |
| 52 | Example: |
| 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 | }; |