linux-kernel - Re: [PATCH 4/9] ARM: dts: sun8i: r40: add crypto engine node

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Date:   Sat, 7 Sep 2019 07:02:17 +0300
From:   Maxime Ripard <mripard@...nel.org>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     davem@...emloft.net, herbert@...dor.apana.org.au,
        linux@...linux.org.uk, mark.rutland@....com, robh+dt@...nel.org,
        wens@...e.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 4/9] ARM: dts: sun8i: r40: add crypto engine node

On Fri, Sep 06, 2019 at 08:45:46PM +0200, Corentin Labbe wrote:
> The Crypto Engine is a hardware cryptographic offloader that supports
> many algorithms.
> It could be found on most Allwinner SoCs.
>
> This patch enables the Crypto Engine on the Allwinner R40 SoC Device-tree.
>
> Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>
> ---
>  arch/arm/boot/dts/sun8i-r40.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-r40.dtsi b/arch/arm/boot/dts/sun8i-r40.dtsi
> index bde068111b85..7eb649cea163 100644
> --- a/arch/arm/boot/dts/sun8i-r40.dtsi
> +++ b/arch/arm/boot/dts/sun8i-r40.dtsi
> @@ -266,6 +266,17 @@
>  			#phy-cells = <1>;
>  		};
>
> +		crypto: crypto-engine@...5000 {
> +			compatible = "allwinner,sun8i-r40-crypto";
> +			reg = <0x01c15000 0x1000>;
> +			interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&ccu CLK_BUS_CE>, <&ccu CLK_CE>;
> +			clock-names = "ahb", "mod";
> +			resets = <&ccu RST_BUS_CE>;
> +			reset-names = "ahb";
> +			status = "okay";

The driver will probe if status is not declared, so if you want it
always enabled you should simply remove status

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com