linux-kernel - [PATCH v2 3/3] arm64: dts: imx8mp: make 'dsp' node depend on 'aips5'

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Message-ID: <20251104150612.1874-4-laurentiumihalcea111@gmail.com>
Date: Tue,  4 Nov 2025 07:06:12 -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 3/3] 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.

Reviewed-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
---
 arch/arm64/boot/dts/freescale/imx8mp-aipstz.h | 33 +++++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8mp.dtsi     |  6 ++++
 2 files changed, 39 insertions(+)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-aipstz.h

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-aipstz.h b/arch/arm64/boot/dts/freescale/imx8mp-aipstz.h
new file mode 100644
index 000000000000..6481c484ca37
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-aipstz.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR MIT) */
+/*
+ * Copyright 2025 NXP
+ */
+
+#ifndef __IMX8MP_AIPSTZ_H
+#define __IMX8MP_AIPSTZ_H
+
+/* consumer type - master or peripheral */
+#define IMX8MP_AIPSTZ_MASTER		0x0
+#define IMX8MP_AIPSTZ_PERIPH		0x1
+
+/* master configuration options */
+#define IMX8MP_AIPSTZ_MPL		(1 << 0)
+#define IMX8MP_AIPSTZ_MTW		(1 << 1)
+#define IMX8MP_AIPSTZ_MTR		(1 << 2)
+#define IMX8MP_AIPSTZ_MBW		(1 << 3)
+
+/* peripheral configuration options */
+#define IMX8MP_AIPSTZ_TP		(1 << 0)
+#define IMX8MP_AIPSTZ_WP		(1 << 1)
+#define IMX8MP_AIPSTZ_SP		(1 << 2)
+#define IMX8MP_AIPSTZ_BW		(1 << 3)
+
+/* master ID definitions */
+#define IMX8MP_AIPSTZ_EDMA		0 /* AUDIOMIX EDMA */
+#define IMX8MP_AIPSTZ_CA53		1 /* Cortex-A53 cluster */
+#define IMX8MP_AIPSTZ_SDMA2		3 /* AUDIOMIX SDMA2 */
+#define IMX8MP_AIPSTZ_SDMA3		3 /* AUDIOMIX SDMA3 */
+#define IMX8MP_AIPSTZ_HIFI4		5 /* HIFI4 DSP */
+#define IMX8MP_AIPSTZ_CM7		6 /* Cortex-M7 */
+
+#endif /* __IMX8MP_AIPSTZ_H */
diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 426c11853d84..2173b539dfb5 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -13,6 +13,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/thermal/thermal.h>
 
+#include "imx8mp-aipstz.h"
 #include "imx8mp-pinfunc.h"
 
 / {
@@ -2479,6 +2480,11 @@ dsp: dsp@...e8000 {
 			firmware-name = "imx/dsp/hifi4.bin";
 			resets = <&audio_blk_ctrl IMX8MP_AUDIOMIX_DSP_RUNSTALL>;
 			reset-names = "runstall";
+			access-controllers = <&aips5
+				IMX8MP_AIPSTZ_HIFI4
+				IMX8MP_AIPSTZ_MASTER
+				(IMX8MP_AIPSTZ_MPL | IMX8MP_AIPSTZ_MTW | IMX8MP_AIPSTZ_MTR)
+			>;
 			status = "disabled";
 		};
 	};
-- 
2.43.0