FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/fpga/xilinx-pr-decoupler.txt

     Xilinx LogiCORE Partial Reconfig Decoupler Softcore
     
     The Xilinx LogiCORE Partial Reconfig Decoupler manages one or more
     decouplers / fpga bridges.
     The controller can decouple/disable the bridges which prevents signal
     changes from passing through the bridge.  The controller can also
     couple / enable the bridges which allows traffic to pass through the
     bridge normally.
     
    Xilinx LogiCORE Dynamic Function eXchange(DFX) AXI shutdown manager
    Softcore is compatible with the Xilinx LogiCORE pr-decoupler.
    
    The Dynamic Function eXchange AXI shutdown manager prevents AXI traffic
    from passing through the bridge. The controller safely handles AXI4MM
    and AXI4-Lite interfaces on a Reconfigurable Partition when it is
    undergoing dynamic reconfiguration, preventing the system deadlock
    that can occur if AXI transactions are interrupted by DFX
    
    The Driver supports only MMIO handling. A PR region can have multiple
    PR Decouplers which can be handled independently or chained via decouple/
    decouple_status signals.
    
    Required properties:
    - compatible            : Should contain "xlnx,pr-decoupler-1.00" followed by
                              "xlnx,pr-decoupler" or
                              "xlnx,dfx-axi-shutdown-manager-1.00" followed by
                              "xlnx,dfx-axi-shutdown-manager"
    - regs                  : base address and size for decoupler module
    - clocks                : input clock to IP
    - clock-names           : should contain "aclk"
    
    See Documentation/devicetree/bindings/fpga/fpga-region.txt and
    Documentation/devicetree/bindings/fpga/fpga-bridge.txt for generic bindings.
    
    Example:
    Partial Reconfig Decoupler:
            fpga-bridge@100000450 {
                    compatible = "xlnx,pr-decoupler-1.00",
                                 "xlnx-pr-decoupler";
                    regs = <0x10000045 0x10>;
                    clocks = <&clkc 15>;
                    clock-names = "aclk";
                    bridge-enable = <0>;
            };
    
    Dynamic Function eXchange AXI shutdown manager:
            fpga-bridge@100000450 {
                    compatible = "xlnx,dfx-axi-shutdown-manager-1.00",
                                 "xlnx,dfx-axi-shutdown-manager";
                    regs = <0x10000045 0x10>;
                    clocks = <&clkc 15>;
                    clock-names = "aclk";
                    bridge-enable = <0>;
            };

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