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SubjectRe: [PATCH v4 2/3] dt-bindings: rng: add bindings for MediaTek ARMv8 SoCs
On Mon, Jun 24, 2019 at 03:24:11PM +0800, Neal Liu wrote:
> Document the binding used by the MediaTek ARMv8 SoCs random
> number generator with TrustZone enabled.
>
> Signed-off-by: Neal Liu <neal.liu@mediatek.com>
> ---
> .../devicetree/bindings/rng/mtk-sec-rng.txt | 10 ++++++++++
> 1 file changed, 10 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/rng/mtk-sec-rng.txt
>
> diff --git a/Documentation/devicetree/bindings/rng/mtk-sec-rng.txt b/Documentation/devicetree/bindings/rng/mtk-sec-rng.txt
> new file mode 100644
> index 0000000..c04ce15
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rng/mtk-sec-rng.txt
> @@ -0,0 +1,10 @@
> +MediaTek random number generator with TrustZone enabled
> +
> +Required properties:
> +- compatible : Should be "mediatek,mtk-sec-rng"

What's the interface to access this?

A node with a 'compatible' and nothing else is a sign of something that
a parent device should instantiate and doesn't need to be in DT. IOW,
what do complete bindings for firmware functions look like?

> +
> +Example:
> +
> +hwrng: hwrng {
> + compatible = "mediatek,mtk-sec-rng";
> +}
> --
> 1.7.9.5
>

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