The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/net/brcm,mdio-mux-iproc.txt

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    1 Properties for an MDIO bus multiplexer found in Broadcom iProc based SoCs.
    2 
    3 This MDIO bus multiplexer defines buses that could be internal as well as
    4 external to SoCs and could accept MDIO transaction compatible to C-22 or
    5 C-45 Clause. When child bus is selected, one needs to select these two
    6 properties as well to generate desired MDIO transaction on appropriate bus.
    7 
    8 Required properties in addition to the generic multiplexer properties:
    9 
   10 MDIO multiplexer node:
   11 - compatible: brcm,mdio-mux-iproc.
   12 
   13 Every non-ethernet PHY requires a compatible so that it could be probed based
   14 on this compatible string.
   15 
   16 Optional properties:
   17 - clocks: phandle of the core clock which drives the mdio block.
   18 
   19 Additional information regarding generic multiplexer properties can be found
   20 at- Documentation/devicetree/bindings/net/mdio-mux.yaml
   21 
   22 
   23 for example:
   24                 mdio_mux_iproc: mdio-mux@66020000 {
   25                         compatible = "brcm,mdio-mux-iproc";
   26                         reg = <0x66020000 0x250>;
   27                         #address-cells = <1>;
   28                         #size-cells = <0>;
   29 
   30                         mdio@0 {
   31                                 reg = <0x0>;
   32                                 #address-cells = <1>;
   33                                 #size-cells = <0>;
   34 
   35                                 pci_phy0: pci-phy@0 {
   36                                         compatible = "brcm,ns2-pcie-phy";
   37                                         reg = <0x0>;
   38                                         #phy-cells = <0>;
   39                                 };
   40                         };
   41 
   42                         mdio@7 {
   43                                 reg = <0x7>;
   44                                 #address-cells = <1>;
   45                                 #size-cells = <0>;
   46 
   47                                 pci_phy1: pci-phy@0 {
   48                                         compatible = "brcm,ns2-pcie-phy";
   49                                         reg = <0x0>;
   50                                         #phy-cells = <0>;
   51                                 };
   52                         };
   53                         mdio@10 {
   54                                 reg = <0x10>;
   55                                 #address-cells = <1>;
   56                                 #size-cells = <0>;
   57 
   58                                 gphy0: eth-phy@10 {
   59                                         reg = <0x10>;
   60                                 };
   61                         };
   62                 };

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