linux-kernel - Re: [PATCH 2/2] dt-bindings: rng: convert Samsung Exynos TRNG to dtschema

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Date:   Tue, 17 Aug 2021 16:07:20 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Lukasz Stelmach <l.stelmach@...sung.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: rng: convert Samsung Exynos TRNG to
 dtschema

On 17/08/2021 14:34, Lukasz Stelmach wrote:
> It was <2021-08-17 wto 12:05>, when Krzysztof Kozlowski wrote:
>> On 17/08/2021 11:55, Lukasz Stelmach wrote:
>>> It was <2021-08-11 śro 10:43>, when Krzysztof Kozlowski wrote:
>>>> Convert Samsung Exynos SoC True Random Number Generator bindings to DT
>>>> schema format using json-schema.
>>>>
>>>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
>>>> ---
>>>>  .../bindings/rng/samsung,exynos5250-trng.txt  | 17 -------
>>>>  .../bindings/rng/samsung,exynos5250-trng.yaml | 44 +++++++++++++++++++
>>>>  MAINTAINERS                                   |  2 +-
>>>>  3 files changed, 45 insertions(+), 18 deletions(-)
>>>>  delete mode 100644 Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.txt
>>>>  create mode 100644 Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.yaml
>>>>
>>>> diff --git
>>>> a/Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.txt
>>>> b/Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.txt
>>>> deleted file mode 100644
>>>> index 5a613a4ec780..000000000000
>>>> --- a/Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.txt
>>>> +++ /dev/null
>>>> @@ -1,17 +0,0 @@
>>>> -Exynos True Random Number Generator
>>>> -
>>>> -Required properties:
>>>> -
>>>> -- compatible  : Should be "samsung,exynos5250-trng".
>>>> -- reg         : Specifies base physical address and size of the registers map.
>>>> -- clocks      : Phandle to clock-controller plus clock-specifier pair.
>>>> -- clock-names : "secss" as a clock name.
>>>> -
>>>> -Example:
>>>> -
>>>> -	rng@...30600 {
>>>> -		compatible = "samsung,exynos5250-trng";
>>>> -		reg = <0x10830600 0x100>;
>>>> -		clocks = <&clock CLK_SSS>;
>>>> -		clock-names = "secss";
>>>> -	};
>>>> diff --git
>>>> a/Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.yaml
>>>> b/Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.yaml
>>>> new file mode 100644
>>>> index 000000000000..a50c34d5d199
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/rng/samsung,exynos5250-trng.yaml
>>>> @@ -0,0 +1,44 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id:
>>>> https://protect2.fireeye.com/v1/url?k=f38ca35b-ac179a0d-f38d2814-0cc47a31ce52-1faa1ecb65482b8a&q=1&e=8b3490f9-a5fc-4da0-b2ee-7b0aec781403&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Frng%2Fsamsung%2Cexynos5250-trng.yaml%23
>>>> +$schema:
>>>> https://protect2.fireeye.com/v1/url?k=9409519d-cb9268cb-9408dad2-0cc47a31ce52-12394c4409905980&q=1&e=8b3490f9-a5fc-4da0-b2ee-7b0aec781403&u=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23
>>>> +
>>>> +title: Samsung Exynos SoC True Random Number Generator
>>>> +
>>>> +maintainers:
>>>> +  - Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
>>>> +  - Łukasz Stelmach <l.stelmach@...sung.com>
>>>> +
>>>> +properties:
>>>> +  compatible:
>>>> +    const: samsung,exynos5250-trng
>>>> +
>>>> +  clocks:
>>>> +    maxItems: 1
>>>
>>> How about copying description from above into the description: property?
>>
>> But what to copy? There is no description except generic clock bindings.
>>
> 
> The description that "was" in the txt file.

But there was no description of fields except copy&paste of the core
schema. Do you describe C code like:

...
/* unsigned int is a integer number greater or equal 0 */
unsigned int i;
...


Best regards,
Krzysztof