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Thu, 15 Oct 2026 13:43:09 +0200 Message-ID: <70074c6d-1141-4723-b61c-dbef3962e381@foss.st.com> Date: Thu, 15 Oct 2026 13:43:09 +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 v2] arm64: dts: st: add thermal zones on stm32mp251 To: Mateusz Nowicki , Alexandre Torgue , Maxime Coquelin CC: Valentin Caron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , , , , References: <20261009093709.19907-1-mateusz.nowicki@posteo.net> Content-Language: en-US From: Patrick DELAUNAY In-Reply-To: <20261009093709.19907-1-mateusz.nowicki@posteo.net> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: STKCAS1NODE1.st.com (10.75.128.134) To STKDAG1NODE2.st.com (10.75.128.133) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DB1PEPF000509E3:EE_|GVXPR10MB8946:EE_ X-MS-Office365-Filtering-Correlation-Id: 4a7f05a1-dab6-4ba6-cbf4-08df2ab19de3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|376014|34020700016|23010399003|82310400026|36860700016|56012099006|11063799006|261009223027099003|22082099003|10067099003|18002099003|13003099007|12100799066; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: JODpdvSrITdcQR2Ussg6daEtguMwoxU4QG1HdVDtg7qvCv1nqkikjPD8ZIkZZnfmACAjkfxXO2wqcAjcCT6W1WhCGaephExyFHN2rZse6spTLgYR/PQHEv7QxHXjHz605H+iOQeRehq8Vl8RforqNoLp/blOwHw3CJPO9+yWHkH7S6XUl7SUdh7RpLicn6LfMa8lLZ8T6j1v1uGZqksyNwd+fvUgXeZTXnsg2ykrAqVpspHMmu2eh8kV2ROUtxNiaJEYsaVqsbY/aIxvaBWkdcG8pAeBoQbpxQTg4WMC19WCyO7TT2FNQ4yyCMRmp46tasW2lAl3ADxDZaNdf2xUV4oeXhMnM3sYmnKRisw9+OkvtjZI848KaqqBbJLLSI4PvQGAvbn7b9bXR6GStZlI1vrpIlMP0OjUfTk9d2JpoK/RiHABK7b+jhb5YukQfnJ4 X-OriginatorOrg: foss.st.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Oct 2026 11:44:05.5269 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4a7f05a1-dab6-4ba6-cbf4-08df2ab19de3 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: DB1PEPF000509E3.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: GVXPR10MB8946 Hi, On 10/9/26 11:37, Mateusz Nowicki wrote: > Add a CPU and a SoC thermal zone for the two DTS sensors. The sensors > have no interrupt, so both zones are polled. > > Each zone has a critical trip point at 122 C (Tj max 125 C minus > 3 C sensor tolerance). > > Signed-off-by: Mateusz Nowicki > --- > Changes in v2: > - Set critical trip to 122 C with 1 C hysteresis (Tj max minus sensor > tolerance), as suggested by Patrick > - Add polling-delay-passive, the sensors have no interrupt > > Link to v1: https://lore.kernel.org/r/20261004121200.64034-1-mateusz.nowicki@posteo.net/ > > arch/arm64/boot/dts/st/stm32mp251.dtsi | 30 ++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) > > diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi > index b624f998b87c..da75e02f7c8f 100644 > --- a/arch/arm64/boot/dts/st/stm32mp251.dtsi > +++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi > @@ -158,6 +158,36 @@ RET_PD: power-domain-retention { > }; > }; > > + thermal-zones { > + cpu-thermal { > + polling-delay-passive = <250>; > + polling-delay = <1000>; > + thermal-sensors = <&dts 1>; > + > + trips { > + cpu-crit { > + temperature = <122000>; > + hysteresis = <1000>; > + type = "critical"; > + }; > + }; > + }; > + > + soc-thermal { > + polling-delay-passive = <250>; > + polling-delay = <1000>; > + thermal-sensors = <&dts 0>; > + > + trips { > + soc-crit { > + temperature = <122000>; > + hysteresis = <1000>; > + type = "critical"; > + }; > + }; > + }; > + }; > + > timer { > compatible = "arm,armv8-timer"; > interrupt-parent = <&intc>; > > base-commit: f831584128ac2a36fb4fa62fe106793d08c2dbf1 Reviewed-by: Patrick Delaunay Thanks Patrick