linux-kernel - [PATCH v6 6/6] arm64: dts: imx8mp: make 'dsp' node depend on 'aips5'

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Message-Id: <20250415171919.5623-7-laurentiumihalcea111@gmail.com>
Date: Tue, 15 Apr 2025 13:19:19 -0400
From: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>
To: 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>,
	Frank Li <Frank.li@....com>,
	Marco Felsch <m.felsch@...gutronix.de>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Alexander Stein <alexander.stein@...tq-group.com>
Cc: 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: [PATCH v6 6/6] arm64: dts: imx8mp: make 'dsp' node depend on 'aips5'

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 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index ebbc99f9ceba..d0d24fe92c3e 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -2425,6 +2425,11 @@ 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
+				IMX8MP_AIPSTZ_MASTER
+				(IMX8MP_AIPSTZ_MPL | IMX8MP_AIPSTZ_MTW | IMX8MP_AIPSTZ_MTR)
+			>;
 			status = "disabled";
 		};
 	};
-- 
2.34.1