FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/clock/hi6220-clock.txt

     * Hisilicon Hi6220 Clock Controller
     
     Clock control registers reside in different Hi6220 system controllers,
     please refer the following document to know more about the binding rules
     for these system controllers:
     
     Documentation/devicetree/bindings/arm/hisilicon/hisilicon.yaml
     
     Required Properties:
    
    - compatible: the compatible should be one of the following strings to
            indicate the clock controller functionality.
    
            - "hisilicon,hi6220-acpu-sctrl"
            - "hisilicon,hi6220-aoctrl"
            - "hisilicon,hi6220-sysctrl"
            - "hisilicon,hi6220-mediactrl"
            - "hisilicon,hi6220-pmctrl"
            - "hisilicon,hi6220-stub-clk"
    
    - reg: physical base address of the controller and length of memory mapped
      region.
    
    - #clock-cells: should be 1.
    
    Optional Properties:
    
    - hisilicon,hi6220-clk-sram: phandle to the syscon managing the SoC internal sram;
      the driver need use the sram to pass parameters for frequency change.
    
    - mboxes: use the label reference for the mailbox as the first parameter, the
      second parameter is the channel number.
    
    Example 1:
            sys_ctrl: sys_ctrl@f7030000 {
                    compatible = "hisilicon,hi6220-sysctrl", "syscon";
                    reg = <0x0 0xf7030000 0x0 0x2000>;
                    #clock-cells = <1>;
            };
    
    Example 2:
            stub_clock: stub_clock {
                    compatible = "hisilicon,hi6220-stub-clk";
                    hisilicon,hi6220-clk-sram = <&sram>;
                    #clock-cells = <1>;
                    mboxes = <&mailbox 1>;
            };
    
    Each clock is assigned an identifier and client nodes use this identifier
    to specify the clock which they consume.
    
    All these identifier could be found in <dt-bindings/clock/hi6220-clock.h>.

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