linux-kernel - Re: [PATCH v4 6/6] arm64: dts: imx8mp: make 'dsp' node depend on 'aips5'

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Message-ID: <Z+xYIdS6HBVAc61r@lizhi-Precision-Tower-5810>
Date: Tue, 1 Apr 2025 17:18:25 -0400
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>,
	Marco Felsch <m.felsch@...gutronix.de>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	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 v4 6/6] arm64: dts: imx8mp: make 'dsp' node depend on
 'aips5'

On Tue, Apr 01, 2025 at 11:44:04AM -0400, Laurentiu Mihalcea wrote:
> From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
>
> The DSP needs to access peripherals on AIPSTZ5 (to communicate with
> the AP using AUDIOMIX MU, for instance). To do so, the 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>

Reviewed-by: Frank Li <Frank.Li@....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 ebbc99f9ceba..f0f0ff5edea6 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -2425,6 +2425,7 @@ dsp: dsp@...e8000 {
>  			mboxes = <&mu2 2 0>, <&mu2 2 1>,
>  				<&mu2 3 0>, <&mu2 3 1>;
>  			memory-region = <&dsp_reserved>;
> +			access-controllers = <&aips5 IMX8MP_AIPSTZ_HIFI4_T_RW_PL>;
>  			status = "disabled";
>  		};
>  	};
> --
> 2.34.1
>