linux-kernel - Re: [RESEND PATCH 3/6] ARM: dts: imx7s: add CAAM device node

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Date:   Wed, 24 Jan 2018 18:12:46 +0000
From:   "Auer, Lukas" <lukas.auer@...ec.fraunhofer.de>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "aymen.sghaier@....com" <aymen.sghaier@....com>,
        "horia.geanta@....com" <horia.geanta@....com>,
        "pure.logic@...us-software.ie" <pure.logic@...us-software.ie>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
CC:     "peng.fan@....com" <peng.fan@....com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "ryan.harkin@...aro.org" <ryan.harkin@...aro.org>,
        "fabio.estevam@....com" <fabio.estevam@....com>,
        "rui.silva@...aro.org" <rui.silva@...aro.org>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>
Subject: Re: [RESEND PATCH 3/6] ARM: dts: imx7s: add CAAM device node

On Wed, 2018-01-24 at 14:50 +0000, Bryan O'Donoghue wrote:
> From: Rui Miguel Silva <rui.silva@...aro.org>
> 
> Add CAAM device node to the i.MX7s device tree.
> 
> Signed-off-by: Rui Miguel Silva <rui.silva@...aro.org>
> Cc: "Horia Geantă" <horia.geanta@....com>
> Cc: Aymen Sghaier <aymen.sghaier@....com>
> Cc: Fabio Estevam <fabio.estevam@....com>
> Cc: Peng Fan <peng.fan@....com>
> Cc: Herbert Xu <herbert@...dor.apana.org.au>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Lukas Auer <lukas.auer@...ec.fraunhofer.de>
> Signed-off-by: Bryan O'Donoghue <pure.logic@...us-software.ie>
> ---
>  arch/arm/boot/dts/imx7s.dtsi | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/imx7s.dtsi
> b/arch/arm/boot/dts/imx7s.dtsi
> index 82ad26e..0da146e 100644
> --- a/arch/arm/boot/dts/imx7s.dtsi
> +++ b/arch/arm/boot/dts/imx7s.dtsi
> @@ -805,6 +805,32 @@
>  				status = "disabled";
>  			};
>  
> +			crypto: caam@...00000 {
> +				compatible = "fsl,sec-v4.0";
> +				fsl,sec-era = <4>;
> +				#address-cells = <1>;
> +				#size-cells = <1>;
> +				reg = <0x30900000 0x10000>;
> +				ranges = <0 0x30900000 0x10000>;
> +				clocks = <&clks IMX7D_CAAM_MEM_CLK>,
> +					 <&clks
> IMX7D_CAAM_ACLK_CLK>,
> +					 <&clks IMX7D_CAAM_IPG_CLK>,
> +					 <&clks IMX7D_EIM_ROOT_CLK>;
> +				clock-names = "mem", "aclk", "ipg",
> "emi_slow";
> +
> +				sec_jr0: jr0@...0 {
> +					compatible = "fsl,sec-v4.0-
> job-ring";
> +					reg = <0x1000 0x1000>;
> +					interrupts = <GIC_SPI 105
> IRQ_TYPE_LEVEL_HIGH>;
> +				};
> +
> +				sec_jr1: jr1@...0 {
> +					compatible = "fsl,sec-v4.0-
> job-ring";
> +					reg = <0x2000 0x1000>;
> +					interrupts = <GIC_SPI 106
> IRQ_TYPE_LEVEL_HIGH>;
> +				};
> +			};
> +
>  			flexcan1: can@...00000 {
>  				compatible = "fsl,imx7d-flexcan",
> "fsl,imx6q-flexcan";
>  				reg = <0x30a00000 0x10000>;

Looking at the device tree from the NXP kernel [1], the job ring and
clock configurations should be slightly different.

The job ring configuration has one additional job ring at offset 3000
and interrupt 114.

The clock configuration has changed to just one CAAM-specific clock in
addition to the ahb clock. This also means that additional
modifications to the CAAM driver are necessary or it will complain that
it doesn't find all clocks. 

Thanks,
Lukas


[1] https://github.com/Freescale/linux-fslc/blob/4.1-2.0.x-imx/arch/arm
/boot/dts/imx7d.dtsi