linux-kernel - Re: [PATCH v2 0/3] Raspberry Pi 4 HWRNG Support

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Date:   Wed, 11 Dec 2019 17:33:30 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Stephen Brennan <stephen@...nnan.io>
Cc:     Matt Mackall <mpm@...enic.com>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Eric Anholt <eric@...olt.net>,
        Stefan Wahren <wahrenst@....net>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 0/3] Raspberry Pi 4 HWRNG Support

On Mon, Nov 18, 2019 at 10:14:04PM -0800, Stephen Brennan wrote:
> This patch series enables support for the HWRNG included on the Raspberry
> Pi 4.  It is simply a rebase of Stefan's branch [1]. I went ahead and
> tested this out on a Pi 4.  Prior to this patch series, attempting to use
> the hwrng gives:
> 
>     $ head -c 2 /dev/hwrng
>     head: /dev/hwrng: Input/output error
> 
> After this series, the same command gives two random bytes.
> 
> Changes in v2:
> - specify the correct size for the region in the dts, refactor bcm283x rng
> 
> ---
> 
> Stefan Wahren (2):
>   dt-bindings: rng: add BCM2711 RNG compatible
>   hwrng: iproc-rng200: Add support for BCM2711
> 
> Stephen Brennan (1):
>   ARM: dts: bcm2711: Enable HWRNG support
> 
>  .../devicetree/bindings/rng/brcm,iproc-rng200.txt     |  1 +
>  arch/arm/boot/dts/bcm2711.dtsi                        |  6 +++---
>  arch/arm/boot/dts/bcm2835.dtsi                        |  1 +
>  arch/arm/boot/dts/bcm2836.dtsi                        |  1 +
>  arch/arm/boot/dts/bcm2837.dtsi                        |  1 +
>  arch/arm/boot/dts/bcm283x-common.dtsi                 | 11 +++++++++++
>  arch/arm/boot/dts/bcm283x.dtsi                        |  6 ------
>  drivers/char/hw_random/Kconfig                        |  2 +-
>  drivers/char/hw_random/iproc-rng200.c                 |  1 +
>  9 files changed, 20 insertions(+), 10 deletions(-)
>  create mode 100644 arch/arm/boot/dts/bcm283x-common.dtsi

Patches 1-2 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