linux-kernel - Re: [PATCH v2 2/2] hwrng: msm

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Message-ID: <20180619143032.4qov5jrbhbsbp6dv@gondor.apana.org.au>
Date:   Tue, 19 Jun 2018 22:30:32 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Vinod Koul <vinod.koul@...aro.org>
Cc:     linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        Matt Mackall <mpm@...enic.com>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org, Stephen Boyd <swboyd@...omium.org>,
        Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH v2 2/2] hwrng: msm - Add support for prng v2

On Tue, Jun 19, 2018 at 03:24:30PM +0530, Vinod Koul wrote:
> Qcom 8996 and later chips support prng v2 which requires to
> implement only .read callback for hwrng.
> 
> This version of chip has multiple Execution Environments (EE) and
> secure world is typically responsible for configuring the prng.
> 
> Add driver data for qcom,prng as 0 and qcom,prng-v2 as 1 and use
> that to skip initialization and cleanup routines.
> 
> Signed-off-by: Vinod Koul <vkoul@...nel.org>

Is this a pseudo RNG?

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt