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Mon, 28 Sep 2026 10:45:18 +0200 Message-ID: <7ee09655-2fef-4334-b0aa-b56f7ae03f74@foss.st.com> Date: Mon, 28 Sep 2026 10:45:18 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: st: fix arm,smc-id of the SMC watchdog on stm32mp2 To: Mateusz Nowicki , CC: , , , , , , , , , References: <20260907091400.55954-1-mateusz.nowicki@posteo.net> Content-Language: en-US From: Alexandre TORGUE In-Reply-To: <20260907091400.55954-1-mateusz.nowicki@posteo.net> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: ENXCAS1NODE2.st.com (10.75.128.138) To STKDAG1NODE2.st.com (10.75.128.133) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DB1PEPF000509F2:EE_|DB8PR10MB3738:EE_ X-MS-Office365-Filtering-Correlation-Id: 78fb5687-855b-4260-3d99-08df1d3cd428 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|36860700016|1800799024|376014|82310400026|56012099006|11063799006|10067099003|18002099003|22082099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: WQAuka2RCjQ+KLjukQzMhhzBlwrGV1jcnHHAH+LdzkIyA8VoSJmua/61g1GGSi4mByhD9nzSxLWrIu0Mv/cRa5mL7s5jDkAvhXwnT+gq8nAwxPV6nIAq+DTOV1tEG+0O3vp80xUBelCFFlg1CuoghE8v9SukM0V/mxePlPaWl0pcGxupki4bWH68o/ZJNLuaWs4Pbqh03f/+TcMlty1OSj+rhVLETcuzG8Du2PKOhAAddwB8YPuYAGgZly65kO/Su29FbW5wA5Fxf4Es4MddDrkB5NjFQUEE4iEqB98SdM+tg4GfawIqLeLaC84mPvVTDm+slPIRrESPlrOXn4DDahc0uZ3WCMyFytfzZ7cKwbpWMdwIaZ07nrbnarEbqCGXw2pBuVEOz9HlHH5rBoMFjG0nUQAPiiW7EhQ6shLe7EjcJIxyTIsgqsBVIvOpD/56 X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Sep 2026 08:45:20.3383 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 78fb5687-855b-4260-3d99-08df1d3cd428 X-MS-Exchange-CrossTenant-Id: 75e027c9-20d5-47d5-b82f-77d7cd041e8f X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=75e027c9-20d5-47d5-b82f-77d7cd041e8f;Ip=[164.130.1.60];Helo=[smtpO365.st.com] X-MS-Exchange-CrossTenant-AuthSource: DB1PEPF000509F2.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR10MB3738 Hi Mateusz On 9/7/26 11:14, Mateusz Nowicki wrote: > OP-TEE implements the STM32MP2 watchdog SMC service with function ID > 0xbc000000 (CFG_WDT_SM_HANDLER_ID), not 0xb200005a. With the current > value the arm_smc_wdt probe fails with -EIO and the IWDG started by the > bootloader is never refreshed. > > Fixes: 89fca38168c9 ("arm64: dts: st: add arm-wdt node for watchdog support on stm32mp251") > Fixes: e9b03ef21386 ("arm64: dts: st: introduce stm32mp23 SoCs family") > Signed-off-by: Mateusz Nowicki > --- > arch/arm64/boot/dts/st/stm32mp231.dtsi | 2 +- > arch/arm64/boot/dts/st/stm32mp251.dtsi | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/arm64/boot/dts/st/stm32mp231.dtsi b/arch/arm64/boot/dts/st/stm32mp231.dtsi > index 9e1d240888ff..35e247af957c 100644 > --- a/arch/arm64/boot/dts/st/stm32mp231.dtsi > +++ b/arch/arm64/boot/dts/st/stm32mp231.dtsi > @@ -35,7 +35,7 @@ arm-pmu { > > arm_wdt: watchdog { > compatible = "arm,smc-wdt"; > - arm,smc-id = <0xb200005a>; > + arm,smc-id = <0xbc000000>; > status = "disabled"; > }; > > diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi > index 9c63fdb5a885..2dcbba65e298 100644 > --- a/arch/arm64/boot/dts/st/stm32mp251.dtsi > +++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi > @@ -36,7 +36,7 @@ arm-pmu { > > arm_wdt: watchdog { > compatible = "arm,smc-wdt"; > - arm,smc-id = <0xb200005a>; > + arm,smc-id = <0xbc000000>; > status = "disabled"; > }; > Applied on stm32-next. Thanks Alex