linux-kernel - [PATCH 6/6] arm64: dts: imx8qm-tqma8qm-mba8x: Disable Cortex-A72 cluster

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Message-ID: <20251218154412.1524249-2-alexander.stein@ew.tq-group.com>
Date: Thu, 18 Dec 2025 16:44:08 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Peter Chen <peter.chen@...nel.org>,
	Pawel Laszczak <pawell@...ence.com>,
	Roger Quadros <rogerq@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Magnus Damm <magnus.damm@...il.com>,
	Marek Vasut <marex@...x.de>
Cc: Alexander Stein <alexander.stein@...tq-group.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	linux-clk@...r.kernel.org,
	linux-usb@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux@...tq-group.com
Subject: [PATCH 6/6] arm64: dts: imx8qm-tqma8qm-mba8x: Disable Cortex-A72 cluster

Due to missing workaround for "ERR050104: Arm/A53: Cache coherency issue"
disable the whole Cortex-A72 cluster.

Signed-off-by: Alexander Stein <alexander.stein@...tq-group.com>
---
 .../dts/freescale/imx8qm-tqma8qm-mba8x.dts    | 39 -------------------
 .../boot/dts/freescale/imx8qm-tqma8qm.dtsi    | 13 +++++--
 2 files changed, 10 insertions(+), 42 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm-mba8x.dts b/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm-mba8x.dts
index ba19c3c17c496..4a5ab14ddc550 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm-mba8x.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm-mba8x.dts
@@ -296,45 +296,6 @@ map3 {
 				};
 			};
 		};
-
-		cpu1-thermal {
-			trips {
-				soc_active1_0: trip-active0 {
-					temperature = <40000>;
-					hysteresis = <5000>;
-					type = "active";
-				};
-
-				soc_active1_1: trip-active1 {
-					temperature = <48000>;
-					hysteresis = <3000>;
-					type = "active";
-				};
-
-				soc_active1_2: trip-active2 {
-					temperature = <60000>;
-					hysteresis = <10000>;
-					type = "active";
-				};
-			};
-
-			cooling-maps {
-				map1 {
-					trip = <&soc_active1_0>;
-					cooling-device = <&fan0 1 1>;
-				};
-
-				map2 {
-					trip = <&soc_active1_1>;
-					cooling-device = <&fan0 2 2>;
-				};
-
-				map3 {
-					trip = <&soc_active1_2>;
-					cooling-device = <&fan0 3 3>;
-				};
-			};
-		};
 	};
 };
 
diff --git a/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm.dtsi b/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm.dtsi
index 718c792259a65..57d06817aab63 100644
--- a/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8qm-tqma8qm.dtsi
@@ -11,6 +11,13 @@ / {
 	model = "TQ-Systems i.MX8QM TQMa8QM";
 	compatible = "tq,imx8qm-tqma8qm", "fsl,imx8qm";
 
+	/* Due to missing workaround for ERR050104 */
+	cpus {
+		/delete-node/ cpu-map;
+		/delete-node/ cpu@100;
+		/delete-node/ cpu@101;
+	};
+
 	memory@...00000 {
 		device_type = "memory";
 		/*
@@ -171,6 +178,8 @@ &mu2_m0 {
 };
 
 &thermal_zones {
+	/delete-node/ cpu1-thermal;
+
 	pmic0-thermal {
 		polling-delay-passive = <250>;
 		polling-delay = <2000>;
@@ -196,9 +205,7 @@ map0 {
 					<&A53_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
 					<&A53_1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
 					<&A53_2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
-					<&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
-					<&A72_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
-					<&A72_1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+					<&A53_3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
 			};
 		};
 	};
-- 
2.43.0