cavium-mdio.txt

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    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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