linux/Documentation/devicetree/bindings/hwrng/timeriomem_rng.txt

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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
N.B. currently 'reg' must be four bytes wide and aligned
Example:
hwrng@44 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "timeriomem_rng";
reg = <0x44 0x04>;
period = <1000000>;
};