dt-bindings: rng: add bindings doc for Keystone SA HWRNG driver
The Keystone SA module has a hardware random generator module. This commit adds binding doc for the KS2 SA HWRNG driver. Signed-off-by: Vitaly Andrianov <vitalya@ti.com> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>hifive-unleashed-5.1
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Keystone SoC Hardware Random Number Generator(HWRNG) Module
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On Keystone SoCs HWRNG module is a submodule of the Security Accelerator.
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- compatible: should be "ti,keystone-rng"
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- ti,syscon-sa-cfg: phandle to syscon node of the SA configuration registers.
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This registers are shared between hwrng and crypto drivers.
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- clocks: phandle to the reference clocks for the subsystem
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- clock-names: functional clock name. Should be set to "fck"
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- reg: HWRNG module register space
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Example:
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/* K2HK */
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rng@24000 {
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compatible = "ti,keystone-rng";
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ti,syscon-sa-cfg = <&sa_config>;
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clocks = <&clksa>;
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clock-names = "fck";
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reg = <0x24000 0x1000>;
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};
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