FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/rng/timeriomem_rng.txt

     HWRNG support for the timeriomem_rng driver
     
     Required properties:
     - compatible : "timeriomem_rng"
     - reg : base address to sample from
     - period : wait time in microseconds to use between samples
     
     Optional properties:
     - quality : estimated number of bits of true entropy per 1024 bits read from the
                rng.  Defaults to zero which causes the kernel's default quality to
                be used instead.  Note that the default quality is usually zero
                which disables using this rng to automatically fill the kernel's
                entropy pool.
    
    N.B. currently 'reg' must be at least four bytes wide and 32-bit aligned
    
    Example:
    
    hwrng@44 {
            #address-cells = <1>;
            #size-cells = <1>;
            compatible = "timeriomem_rng";
            reg = <0x44 0x04>;
            period = <1000000>;
    };

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