linux-kernel - Re: [PATCH 5/5] arm64: dts: imx8mp: make 'dsp' node depend on 'aips5'

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Message-ID: <Z7jbBxZregUUKSuQ@lizhi-Precision-Tower-5810>
Date: Fri, 21 Feb 2025 14:59:03 -0500
From: Frank Li <Frank.li@....com>
To: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Daniel Baluta <daniel.baluta@....com>,
	Shengjiu Wang <shengjiu.wang@....com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/5] arm64: dts: imx8mp: make 'dsp' node depend on 'aips5'

On Fri, Feb 21, 2025 at 02:19:09PM -0500, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
>
> The DSP may want to access peripherals on AIPSTZ5. To do so, the

It'd better descript as

The DSP need access ... at ... case.

Frank

> security-related registers of the bridge have to be configured before
> the DSP is started. Enforce a dependency on AIPSTZ5 by adding the
> 'access-controllers' property to the 'dsp' node.
>
> Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index a1d9b834d2da..9ec51e7e6678 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -2423,6 +2423,7 @@ dsp: dsp@...e8000 {
>  			mboxes = <&mu2 2 0>, <&mu2 2 1>,
>  				<&mu2 3 0>, <&mu2 3 1>;
>  			memory-region = <&dsp_reserved>;
> +			access-controllers = <&aips5>;
>  			status = "disabled";
>  		};
>  	};
> --
> 2.34.1
>