linux-kernel - Re: [PATCH v3 2/3] dt-bindings: crypto: document Exynos5433 SlimSSS

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Message-ID: <20190130165115.GA8926@bogus>
Date:   Wed, 30 Jan 2019 10:51:15 -0600
From:   Rob Herring <robh@...nel.org>
To:     Kamil Konieczny <k.konieczny@...tner.samsung.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Mark Rutland <mark.rutland@....com>,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH v3 2/3] dt-bindings: crypto: document Exynos5433 SlimSSS

On Thu, Jan 24, 2019 at 04:45:20PM +0100, Kamil Konieczny wrote:
> Document DT bindings for crypto Samsung Exynos5433 SlimSSS (Slim Security
> SubSystem) IP.
> 
> Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
> Signed-off-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>
> ---
>  .../devicetree/bindings/crypto/samsung-sss.txt     | 14 +++++++++++---
>  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/crypto/samsung-sss.txt b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
> index 7a5ca56683cc..d9af679d38ab 100644
> --- a/Documentation/devicetree/bindings/crypto/samsung-sss.txt
> +++ b/Documentation/devicetree/bindings/crypto/samsung-sss.txt
> @@ -1,4 +1,4 @@
> -Samsung SoC SSS (Security SubSystem) module
> +Samsung SoC SSS (Security SubSystem) and SlimSSS module
>  
>  The SSS module in S5PV210 SoC supports the following:
>  -- Feeder (FeedCtrl)
> @@ -15,6 +15,12 @@ supports the following also:
>  -- True Random Number Generator (TRNG)
>  -- Secure Key Manager
>  
> +Exynos5433 has both SSS and SlimSSS module.

That's not really relevant to the binding.

What do the SSS and SlimSSS share? Only that both have a single reg and 
interrupt based on the binding? This should probably be just 2 
documents. If not now, it will have to be when converted to a DT schema.

> +SlimSSS in Exynos5433 supports:
> +-- Feeder (FeedCtrl)
> +-- Advanced Encryption Standard (AES)
> +-- SHA-1/SHA-256/HMAC (SHA-1/SHA-256)
> +
>  Required properties:
>  
>  - compatible : Should contain entries for this and backward compatible
> @@ -22,11 +28,13 @@ 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 Exynos5433 SoCs.
>  - reg : Offset and length of the register set for the module
>  - interrupts : interrupt specifiers of SSS module interrupts (one feed
>  		control interrupt).
>  
>  - clocks : list of clock phandle and specifier pairs for all clocks  listed in
>  		clock-names property.
> -- clock-names : list of device clock input names; should contain one entry
> -		"secss".
> +- clock-names : list of device clock input names; should contain "pclk" and
> +		"aclk" for slim-sss in Exynos5433, and one entry "secss" for
> +		other compatibles.
> -- 
> 2.20.0
>