# Re: \[PATCH v2 06/17\] dt-bindings: rng: add bindings for microchip mpfs rng

- From: Krzysztof Kozlowski \<hidden\>
- Date: 2021-12-17 14:53:50 
- List: linux-crypto
- Page: https://ratatoskr.run/linux-crypto/2021/12/1612405
- Thread: https://ratatoskr.run/linux-gpio/2021/12/1612014/t.md

```text
On 17/12/2021 10:33, conor.dooley@microchip.com wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> Add device tree bindings for the hardware rng device accessed via
> the system services on the Microchip PolarFire SoC.
> 
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
>  .../bindings/rng/microchip,mpfs-rng.yaml      | 29 +++++++++++++++++++
>  1 file changed, 29 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml
> 
> diff --git a/Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml b/Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml
> new file mode 100644
> index 000000000000..32cbc37c9292
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rng/microchip,mpfs-rng.yaml
> @@ -0,0 +1,29 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/rng/microchip,mpfs-rng.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Microchip MPFS random number generator
> +
> +maintainers:
> +  - Conor Dooley [ref]
> +
> +description: |
> +  The hardware random number generator on the Polarfire SoC is
> +  accessed via the mailbox interface provided by the system controller
> +
> +properties:
> +  compatible:
> +    const: microchip,mpfs-rng
> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    hwrandom: hwrandom {

Three topics:
1. Node name (as most of others are using): rng
2. skip the label, not helping in example.
3. This looks very simple, so I wonder if the bindings are complete. No
IO space/address... How is it going to be instantiated?

> +        compatible = "microchip,mpfs-rng";
> +    };
> 


Best regards,
Krzysztof
```