linux-kernel - Re: [PATCH v4 0/5] hwrng: add support for i.MX6 rngb

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Message-ID: <20200723075742.GD14246@gondor.apana.org.au>
Date:   Thu, 23 Jul 2020 17:57:42 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Horia Geantă <horia.geanta@....com>
Cc:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Matt Mackall <mpm@...enic.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Martin Kaiser <martin@...ser.cx>,
        Marco Felsch <m.felsch@...gutronix.de>,
        Franck Lenormand <franck.lenormand@....com>,
        Iuliana Prodan <iuliana.prodan@....com>,
        Silvano Di Ninno <silvano.dininno@....com>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/5] hwrng: add support for i.MX6 rngb

On Wed, Jul 15, 2020 at 06:25:59PM +0300, Horia Geantă wrote:
> Add support for RNGB found in some i.MX6 SoCs (6SL, 6SLL, 6ULL, 6ULZ),
> based on RNGC driver (drivers/char/hw_random/imx-rngc.c).
> 
> This driver claims support also for RNGB (besides RNGC),
> and is currently used only by i.MX25.
> 
> 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.
> 
> Changelog:
> v4
> -remove unneeded compatible strings from the driver
> v3
> -mention in the DT binding the compatibility with "fsl,imx25-rngb"
> -collected Reviewed-by
> v2
> -update rngb DT binding with compatible strings for i.MX6 SoCs
> 
> Horia Geantă (5):
>   dt-bindings: rng: add RNGB compatibles for i.MX6 SoCs
>   ARM: dts: imx6sl: fix rng node
>   ARM: dts: imx6sll: add rng
>   ARM: dts: imx6ull: add rng
>   hwrng: imx-rngc: enable driver for i.MX6
> 
>  Documentation/devicetree/bindings/rng/imx-rng.txt | 3 +++
>  arch/arm/boot/dts/imx6sl.dtsi                     | 2 ++
>  arch/arm/boot/dts/imx6sll.dtsi                    | 7 +++++++
>  arch/arm/boot/dts/imx6ull.dtsi                    | 7 +++++++
>  drivers/char/hw_random/Kconfig                    | 2 +-
>  5 files changed, 20 insertions(+), 1 deletion(-)

Patches 1 and 5 applied.  Thanks.
-- 
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