FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/reset/st,sti-picophyreset.txt

     STMicroelectronics STi family Sysconfig Picophy SoftReset Controller
     =============================================================================
     
     This binding describes a reset controller device that is used to enable and
     disable on-chip PicoPHY USB2 phy(s) using "softreset" control bits found in
     the STi family SoC system configuration registers.
     
     The actual action taken when softreset is asserted is hardware dependent.
     However, when asserted it may not be possible to access the hardware's
    registers and after an assert/deassert sequence the hardware's previous state
    may no longer be valid.
    
    Please refer to Documentation/devicetree/bindings/reset/reset.txt
    for common reset controller binding usage.
    
    Required properties:
    - compatible: Should be "st,stih407-picophyreset"
    - #reset-cells: 1, see below
    
    Example:
    
            picophyreset: picophyreset-controller {
                    compatible = "st,stih407-picophyreset";
                    #reset-cells = <1>;
            };
    
    Specifying picophyreset control of devices
    =======================================
    
    Device nodes should specify the reset channel required in their "resets"
    property, containing a phandle to the picophyreset device node and an
    index specifying which channel to use, as described in
    Documentation/devicetree/bindings/reset/reset.txt.
    
    Example:
    
            usb2_picophy0: usbpicophy@0 {
                    resets = <&picophyreset STIH407_PICOPHY0_RESET>;
            };
    
    Macro definitions for the supported reset channels can be found in:
    include/dt-bindings/reset/stih407-resets.h

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