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

[Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>]

On 17/12/2021 16:22, Conor.Dooley@xxxxxxxxxxxxx wrote:
> On 17/12/2021 15:07, Krzysztof Kozlowski wrote:
>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>>
>> On 17/12/2021 15:53, Krzysztof Kozlowski wrote:
>>> On 17/12/2021 10:33, conor.dooley@xxxxxxxxxxxxx wrote:
>>>> From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>>>>
>>>> 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@xxxxxxxxxxxxx>
>>>> ---
>>>>   .../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 <conor.dooley@xxxxxxxxxxxxx>
>>>> +
>>>> +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?
>>>
>>
>> OK, now I saw the usage in DTS. I have doubts this makes sense as
>> separate bindings. It looks like integrated part of syscontroller, so
>> maybe make it part of that binding? Or at least add ref to syscontroller
>> bindings that such child is expected.
> Acking the rest of this, re: adding the ref: is what is being done in 
> patch 03/17 insufficient?

Ops, I missed the 03/17. Yeah, it looks it is sufficient and in such
case I think you do not need this patch. The compatible is documented in
03/17. The same for sysserv.


Best regards,
Krzysztof