linux-kernel - [PATCH v2 2/3] arm64: dts: imx8mp: convert 'aips5' to 'aipstz5'

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Message-ID: <20251104150612.1874-3-laurentiumihalcea111@gmail.com>
Date: Tue,  4 Nov 2025 07:06:11 -0800
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>
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 v2 2/3] arm64: dts: imx8mp: convert 'aips5' to 'aipstz5'

From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>

Change the programming model of the "aips5" node to allow configuring
the security-related registers exposed by the AIPSTZ5 bridge. Without
this, masters such as the HIFI4 DSP will have their access to the
peripherals connected to the bridge denied after power cycling the
AUDIOMIX domain.

Co-developed-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
---
 arch/arm64/boot/dts/freescale/imx8mp.dtsi | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 7ab321af9e15..426c11853d84 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -1428,12 +1428,14 @@ eqos: ethernet@...f0000 {
 			};
 		};
 
-		aips5: bus@...00000 {
-			compatible = "fsl,aips-bus", "simple-bus";
-			reg = <0x30c00000 0x400000>;
+		aips5: bus@...f0000 {
+			compatible = "fsl,imx8mp-aipstz";
+			reg = <0x30df0000 0x10000>;
+			power-domains = <&pgc_audio>;
 			#address-cells = <1>;
 			#size-cells = <1>;
-			ranges;
+			#access-controller-cells = <3>;
+			ranges = <0x30c00000 0x30c00000 0x400000>;
 
 			spba-bus@...00000 {
 				compatible = "fsl,spba-bus", "simple-bus";
-- 
2.43.0