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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>
This commit is contained in:
Vitaly Andrianov 2018-03-13 13:33:30 -04:00 committed by Herbert Xu
parent 1d17cbfbb5
commit 2805894c1e
1 changed files with 21 additions and 0 deletions
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Documentation/devicetree/bindings/rng/ks-sa-rng.txt Normal file
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Keystone SoC Hardware Random Number Generator(HWRNG) Module
On Keystone SoCs HWRNG module is a submodule of the Security Accelerator.
- compatible: should be "ti,keystone-rng"
- ti,syscon-sa-cfg: phandle to syscon node of the SA configuration registers.
This registers are shared between hwrng and crypto drivers.
- clocks: phandle to the reference clocks for the subsystem
- clock-names: functional clock name. Should be set to "fck"
- reg: HWRNG module register space
Example:
/* K2HK */
rng@24000 {
compatible = "ti,keystone-rng";
ti,syscon-sa-cfg = <&sa_config>;
clocks = <&clksa>;
clock-names = "fck";
reg = <0x24000 0x1000>;
};