FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/ptp/ptp-ines.txt

     ZHAW InES PTP time stamping IP core
     
     The IP core needs two different kinds of nodes.  The control node
     lives somewhere in the memory map and specifies the address of the
     control registers.  There can be up to three port handles placed as
     attributes of PHY nodes.  These associate a particular MII bus with a
     port index within the IP core.
     
     Required properties of the control node:
    
    - compatible:           "ines,ptp-ctrl"
    - reg:                  physical address and size of the register bank
    
    Required format of the port handle within the PHY node:
    
    - timestamper:          provides control node reference and
                            the port channel within the IP core
    
    Example:
    
            tstamper: timestamper@60000000 {
                    compatible = "ines,ptp-ctrl";
                    reg = <0x60000000 0x80>;
            };
    
            ethernet@80000000 {
                    ...
                    mdio {
                            ...
                            ethernet-phy@3 {
                                    ...
                                    timestamper = <&tstamper 0>;
                            };
                    };
            };

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