linux-kernel - Re: [PATCH] arm64: dts: ti: k3-j721s2-main: Enable crypto accelerator

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Message-ID: <894d0c03-487b-40fc-5634-5b1a78b48701@ti.com>
Date:   Tue, 28 Jun 2022 12:03:45 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Jayesh Choudhary <j-choudhary@...com>, <devicetree@...r.kernel.org>
CC:     <nm@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: ti: k3-j721s2-main: Enable crypto accelerator

Hi,

On 28/06/22 11:15, Jayesh Choudhary wrote:
> +	main_crypto: crypto@...0000 {
> +		compatible = "ti,j721e-sa2ul";
> +		reg = <0x00 0x4e00000 0x00 0x1200>;
> +		power-domains = <&k3_pds 297 TI_SCI_PD_SHARED>;
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges = <0x00 0x04e00000 0x00 0x04e00000 0x00 0x30000>;
> +
> +		dmas = <&main_udmap 0xca40>, <&main_udmap 0x4a40>,
> +				<&main_udmap 0x4a41>;
> +		dma-names = "tx", "rx1", "rx2";


> +		dma-coherent;


Crytpo device itself is not dma-coherent as it can never be bus master.
Its the DMAengine that does data movement and the buffers are to be
mapped to dmaengine provider. So this property should be dropped

> +	};
> +

-- 
Regards
Vignesh