Documentation/devicetree/bindings/net/cavium-mdio.txt

   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         };