linux-kernel - Re: [PATCH v1 2/3] dt-bindings: crypto: document Exynos5433 SlimSSS

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Date:   Wed, 23 Jan 2019 17:18:03 +0100
From:   Kamil Konieczny <k.konieczny@...tner.samsung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH v1 2/3] dt-bindings: crypto: document Exynos5433 SlimSSS

On 23.01.2019 08:59, Krzysztof Kozlowski wrote:
> On Tue, 22 Jan 2019 at 16:26, Kamil Konieczny
> <k.konieczny@...tner.samsung.com> wrote:
>>
>> Document DT bindings for crypto Samsung Exynos5433 SlimSSS (Slim Security
>> SubSystem) IP.
>>
>> Signed-off-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>
>> ---
>>  .../devicetree/bindings/crypto/samsung-sss.txt      | 13 ++++++++++---
>>  1 file changed, 10 insertions(+), 3 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/crypto/samsung-sss.txt b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
>> [...]
>>  - compatible : Should contain entries for this and backward compatible
>> @@ -22,11 +27,13 @@ Required properties:
>>    - "samsung,s5pv210-secss" for S5PV210 SoC.
>>    - "samsung,exynos4210-secss" for Exynos4210, Exynos4212, Exynos4412, Exynos5250,
>>                 Exynos5260 and Exynos5420 SoCs.
>> +  - "samsung,exynos5433-slim-sss" for Exynos542x and Exynos5433 SoCs.
> 
> For Exynos5420 there is a driver for regular/full SSS module. It would
> be nice to explain what is the difference between them and/or mention
> potential conflicts of usage.
> 
> The point is that previously we added drivers/bindings for SSS and now
> you use the other interface. It might be pretty confusing for users...

By the way, Exynos4 (Exynos4210, 4412) SSS do not have ARCFOUR (ARC4), nor
TRNG nor Secure Key Manager.

-- 
Best regards,
Kamil Konieczny
Samsung R&D Institute Poland