linux-kernel - Re: [PATCH v3 1/5] dt-bindings: rng: add RNGB compatibles for i.MX6 SoCs

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Date:   Tue, 14 Jul 2020 15:09:44 -0600
From:   Rob Herring <robh@...nel.org>
To:     Horia Geantă <horia.geanta@....com>
Cc:     Franck Lenormand <franck.lenormand@....com>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Matt Mackall <mpm@...enic.com>,
        Iuliana Prodan <iuliana.prodan@....com>,
        linux-crypto@...r.kernel.org, Fabio Estevam <festevam@...il.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Martin Kaiser <martin@...ser.cx>,
        linux-arm-kernel@...ts.infradead.org,
        NXP Linux Team <linux-imx@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        Shawn Guo <shawnguo@...nel.org>,
        Silvano Di Ninno <silvano.dininno@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>
Subject: Re: [PATCH v3 1/5] dt-bindings: rng: add RNGB compatibles for i.MX6
 SoCs

On Tue, 14 Jul 2020 15:39:16 +0300, Horia Geantă wrote:
> RNGB block is found in some i.MX6 SoCs - 6SL, 6SLL, 6ULL, 6ULZ.
> Add corresponding compatible strings.
> 
> Note:
> 
> Several NXP SoC from QorIQ family (P1010, P1023, P4080, P3041, P5020)
> also have a RNGB, however it's part of the CAAM
> (Cryptograhic Accelerator and Assurance Module) crypto accelerator.
> In this case, RNGB is managed in the caam driver
> (drivers/crypto/caam/), since it's tightly related to
> the caam "job ring" interface, not to mention CAAM internally relying on
> RNGB as source of randomness.
> 
> On the other hand, the i.MX6 SoCs with RNGB have a DCP
> (Data Co-Processor) crypto accelerator and this block and RNGB
> are independent.
> 
> Signed-off-by: Horia Geantă <horia.geanta@....com>
> ---
>  Documentation/devicetree/bindings/rng/imx-rng.txt | 3 +++
>  1 file changed, 3 insertions(+)
> 

Reviewed-by: Rob Herring <robh@...nel.org>