linux-kernel - Re: [PATCH v3 4/4] ARM: dts: bcm2711: Enable HWRNG support

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Message-ID: <073219d4e46bab9fb6ba972ebc2ee2f3b55abf55.camel@suse.de>
Date:   Wed, 20 Nov 2019 20:45:12 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Stephen Brennan <stephen@...nnan.io>
Cc:     Mark Rutland <mark.rutland@....com>, devicetree@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Scott Branden <sbranden@...adcom.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-kernel@...ts.infradead.org, Ray Jui <rjui@...adcom.com>,
        linux-kernel@...r.kernel.org, Eric Anholt <eric@...olt.net>,
        Rob Herring <robh+dt@...nel.org>,
        bcm-kernel-feedback-list@...adcom.com,
        Stefan Wahren <wahrenst@....net>,
        Matt Mackall <mpm@...enic.com>, Arnd Bergmann <arnd@...db.de>,
        linux-crypto@...r.kernel.org
Subject: Re: [PATCH v3 4/4] ARM: dts: bcm2711: Enable HWRNG support

On Tue, 2019-11-19 at 19:16 -0800, Stephen Brennan wrote:
> This enables hardware random number generator support for the BCM2711
> on the Raspberry Pi 4 board.
> 
> Signed-off-by: Stephen Brennan <stephen@...nnan.io>
> ---
>  arch/arm/boot/dts/bcm2711.dtsi | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
> index ac83dac2e6ba..ed0877d5a1e9 100644
> --- a/arch/arm/boot/dts/bcm2711.dtsi
> +++ b/arch/arm/boot/dts/bcm2711.dtsi
> @@ -92,10 +92,9 @@ pm: watchdog@...00000 {
>  		};
>  
>  		rng@...04000 {
> -			interrupts = <GIC_SPI 125 IRQ_TYPE_LEVEL_HIGH>;
> -
> -			/* RNG is incompatible with brcm,bcm2835-rng */
> -			status = "disabled";
> +			compatible = "brcm,bcm2711-rng200";
> +			reg = <0x7e104000 0x28>;
> +			status = "okay";

Small nitpick, the 'okay' status is set by default, so no need for this. But
it's something we can edit out once we pick the patch.

Regards,
Nicolas


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