linux-kernel - Re: [PATCH v2 4/4] arm64: dts: ti: k3-j7200-mcu-wakeup: Add SA2UL node

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Date:   Tue, 30 Aug 2022 15:34:15 +0530
From:   Jayesh Choudhary <j-choudhary@...com>
To:     Andrew Davis <afd@...com>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 4/4] arm64: dts: ti: k3-j7200-mcu-wakeup: Add SA2UL
 node



On 23/08/22 05:41, Andrew Davis wrote:
> J7200 has an instance of SA2UL in the MCU domain.
> Add DT node for the same.
> 
> The device is marked TI_SCI_PD_SHARED as parts of this IP are also
> shared with the security co-processor and OP-TEE.
> 
> The RNG node is added but marked disabled as it is firewalled off for
> exclusive use by OP-TEE. Any access to this device from Linux will
> result in firewall errors. We add the node for completeness of the
> hardware description.
> 
> Signed-off-by: Andrew Davis <afd@...com>
> ---
>   .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi      | 20 +++++++++++++++++++
>   1 file changed, 20 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> index ff13bbeed30c..e5be78a58682 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> @@ -375,4 +375,24 @@ mcu_r5fss0_core1: r5f@...00000 {
>   			ti,loczrama = <1>;
>   		};
>   	};
> +
> +	mcu_crypto: crypto@...00000 {
> +		compatible = "ti,j721e-sa2ul";
> +		reg = <0x00 0x40900000 0x00 0x1200>;
> +		power-domains = <&k3_pds 265 TI_SCI_PD_SHARED>;
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges = <0x00 0x40900000 0x00 0x40900000 0x00 0x30000>;
> +		dmas = <&mcu_udmap 0xf501>, <&mcu_udmap 0x7502>,
> +		       <&mcu_udmap 0x7503>;
> +		dma-names = "tx", "rx1", "rx2";
> +		dma-coherent;
> +
> +		rng: rng@...10000 {
> +			compatible = "inside-secure,safexcel-eip76";
> +			reg = <0x00 0x40910000 0x00 0x7d>;
> +			interrupts = <GIC_SPI 945 IRQ_TYPE_LEVEL_HIGH>;
> +			status = "disabled"; /* Used by OP-TEE */
> +		};
> +	};
>   };

Reviewed-by: Jayesh Choudhary <j-choudhary@...com>