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Wed, 7 Oct 2026 17:14:08 +0200 From: Antonio Borneo To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue , , , , CC: Antonio Borneo , Amelie Delaunay Subject: [PATCH 3/3] ARM: dts: stm32: enable ARM SMC watchdog on STM32MP15 SCMI boards Date: Wed, 7 Oct 2026 17:13:58 +0200 Message-ID: <20261007151358.1166329-4-antonio.borneo@foss.st.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261007151358.1166329-1-antonio.borneo@foss.st.com> References: <20261007151358.1166329-1-antonio.borneo@foss.st.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.252.9.73] 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: MI3PEPF0000848D:EE_|ZR6PR10MB992206:EE_ X-MS-Office365-Filtering-Correlation-Id: 6a796d07-2c20-41f4-872c-08df2485d6f5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|376014|23010399003|36860700016|10067099003|56012099006|11063799006|22082099003|18002099003; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Amelie Delaunay On STM32MP15 SCMI boards, IWDG1 is secured and monitored through OP-TEE. Enable the arm,smc-wdt node on ST SCMI board variants so Linux can control the secure watchdog through SMC calls. Signed-off-by: Amelie Delaunay Signed-off-by: Antonio Borneo --- arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dts | 5 +++++ arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dts | 5 +++++ arch/arm/boot/dts/st/stm32mp157c-ed1-scmi.dts | 5 +++++ arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dts | 5 +++++ 4 files changed, 20 insertions(+) diff --git a/arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dts b/arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dts index 53e40e2f776b7..345c5694abf50 100644 --- a/arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dts +++ b/arch/arm/boot/dts/st/stm32mp157a-dk1-scmi.dts @@ -21,6 +21,11 @@ optee@de000000 { }; }; +&arm_wdt { + timeout-sec = <32>; + status = "okay"; +}; + &cpu0 { clocks = <&scmi_clk CK_SCMI_MPU>; }; diff --git a/arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dts b/arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dts index 0790ed426ebc0..8e32fa89c8a1b 100644 --- a/arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dts +++ b/arch/arm/boot/dts/st/stm32mp157c-dk2-scmi.dts @@ -21,6 +21,11 @@ optee@de000000 { }; }; +&arm_wdt { + timeout-sec = <32>; + status = "okay"; +}; + &cpu0 { clocks = <&scmi_clk CK_SCMI_MPU>; }; diff --git a/arch/arm/boot/dts/st/stm32mp157c-ed1-scmi.dts b/arch/arm/boot/dts/st/stm32mp157c-ed1-scmi.dts index 0a3894aff4aea..ac4d411005032 100644 --- a/arch/arm/boot/dts/st/stm32mp157c-ed1-scmi.dts +++ b/arch/arm/boot/dts/st/stm32mp157c-ed1-scmi.dts @@ -21,6 +21,11 @@ optee@fe000000 { }; }; +&arm_wdt { + timeout-sec = <32>; + status = "okay"; +}; + &cpu0 { clocks = <&scmi_clk CK_SCMI_MPU>; }; diff --git a/arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dts b/arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dts index c2b6efb1cbb74..6b26d87f7edef 100644 --- a/arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dts +++ b/arch/arm/boot/dts/st/stm32mp157c-ev1-scmi.dts @@ -21,6 +21,11 @@ optee@fe000000 { }; }; +&arm_wdt { + timeout-sec = <32>; + status = "okay"; +}; + &cpu0 { clocks = <&scmi_clk CK_SCMI_MPU>; }; -- 2.34.1