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Thu, 22 Oct 2026 01:45:27 +0000 From: "Peng Fan (OSS)" Date: Thu, 22 Oct 2026 09:50:01 +0800 Subject: [PATCH 1/2] arm64: dts: imx8qm-mek: Re-enable A72 cluster after ERR050104 workaround Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261022-8qm-v1-1-2a597cb3debd@nxp.com> References: <20261022-8qm-v1-0-2a597cb3debd@nxp.com> In-Reply-To: <20261022-8qm-v1-0-2a597cb3debd@nxp.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux@ew.tq-group.com, Peng Fan X-Mailer: b4 0.16-dev-7bc12 X-ClientProxiedBy: SI3PR01CA0005.apcprd01.prod.exchangelabs.com (2603:1096:4:296::13) To AM8PR04MB7874.eurprd04.prod.outlook.com (2603:10a6:20b:24d::9) X-Archived-By: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM8PR04MB7874:EE_|MI7PR04MB114164:EE_ X-MS-Office365-Filtering-Correlation-Id: ac11c254-8d01-4921-5fc5-08df2fde25f0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|19092799006|1800799024|376014|23010399003|7416014|10067099003|22082099003|18002099003|261021123027099003|11063799006|261009223027099003|261021121427099003|56012099006; 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The workaround addresses the incorrect wiring of upper address bits in the A53 subsystem that corrupts TLBI and IC maintenance operations between A53 and A72 clusters. Previously the A72 CPUs (cpu@100, cpu@101), the cpu-map, and the cpu1-thermal zone were removed from the MEK board DT to avoid incorrect cross-cluster coherency maintenance. With the software workaround in place, restore all deleted nodes. Signed-off-by: Peng Fan --- arch/arm64/boot/dts/freescale/imx8qm-mek.dts | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts index 9e49ac377162b..af212fa194cf7 100644 --- a/arch/arm64/boot/dts/freescale/imx8qm-mek.dts +++ b/arch/arm64/boot/dts/freescale/imx8qm-mek.dts @@ -17,16 +17,6 @@ chosen { stdout-path = &lpuart0; }; - cpus { - /delete-node/ cpu-map; - /delete-node/ cpu@100; - /delete-node/ cpu@101; - }; - - thermal-zones { - /delete-node/ cpu1-thermal; - }; - memory@80000000 { device_type = "memory"; reg = <0x00000000 0x80000000 0 0x40000000>; -- 2.34.1