From: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Subject: Re: [PATCH 0/3] ARM: dts: Enable Exynos RNG module
Date: Mon, 19 Oct 2015 18:11:19 +0200
Message-ID: <56251627.4050908@math.uni-bielefeld.de>
References: <1445230834-32689-1-git-send-email-k.kozlowski@samsung.com>
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Cc: Heiner Kallweit <hkallweit1@gmail.com>
To: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
	Kukjin Kim <kgene@kernel.org>,
	Sylwester Nawrocki <s.nawrocki@samsung.com>,
	Tomasz Figa <tomasz.figa@gmail.com>,
	Michael Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@codeaurora.org>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-clk@vger.kernel.org, Matt Mackall <mpm@selenic.com>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	linux-crypto@vger.kernel.org
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Hello Krzysztof,

I can confirm that this also works on a Odroid-X2, so I guess it's safe
to enable the PRNG for all Exynos4412-based Odroid devices.

Any chance that you might also take a look at the other hwcrypto stuff
on the SoC ('samsung,exynos4210-secss' compatible)?

With best wishes,
Tobias


Krzysztof Kozlowski wrote:
> Hi,
> 
> 
> The patchset adds necessary clock from Security SubSystem (SSS)
> and enables the PRNG module of Exynos for Trats2 board.
> 
> The first patch (clock) is required for other ones so please
> take everything in one step.
> 
> The actual Device Tree support (and compatible) was sent in separate
> patch:
>  - https://patchwork.kernel.org/patch/7432891/
>  - http://marc.info/?l=linux-crypto-vger&m=144522952725052&w=2
> 
> The device can be tested (after applying both patchsets) with:
> $ echo exynos > /sys/class/misc/hw_random/rng_current
> $ dd if=/dev/hwrng of=/dev/null bs=1 count=16
> 
> 
> Best regards,
> Krzysztof
> 
> Krzysztof Kozlowski (3):
>   clk: samsung: exynos4: Add SSS gate clock
>   ARM: dts: Add PRNG module for exynos4
>   ARM: dts: Enable PRNG module on exynos4412-trats2
> 
>  arch/arm/boot/dts/exynos4.dtsi          | 8 ++++++++
>  arch/arm/boot/dts/exynos4412-trats2.dts | 4 ++++
>  drivers/clk/samsung/clk-exynos4.c       | 1 +
>  include/dt-bindings/clock/exynos4.h     | 1 +
>  4 files changed, 14 insertions(+)
>