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 };
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