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It can be used by Linux as the Cortex-A7 watchdog when it's configured as non-secure. Signed-off-by: Gatien Chevallier --- arch/arm/boot/dts/st/stm32mp131.dtsi | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/boot/dts/st/stm32mp131.dtsi b/arch/arm/boot/dts/st/st= m32mp131.dtsi index fd730aa37c22..a18da1a04fe3 100644 --- a/arch/arm/boot/dts/st/stm32mp131.dtsi +++ b/arch/arm/boot/dts/st/stm32mp131.dtsi @@ -1657,6 +1657,16 @@ usbphyc_port1: usb-phy@1 { reg =3D <1>; }; }; + + iwdg1: watchdog@5c003000 { + compatible =3D "st,stm32mp1-iwdg"; + reg =3D <0x5c003000 0x400>; + interrupts =3D ; + clocks =3D <&rcc IWDG1>, <&scmi_clk CK_SCMI_LSI>; + clock-names =3D "pclk", "lsi"; + access-controllers =3D <&etzpc 12>; + status =3D "disabled"; + }; }; =20 /* --=20 2.43.0 From nobody Thu Dec 18 18:01:31 2025 Received: from mx08-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A787C33345B; Fri, 31 Oct 2025 10:01:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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When the platform watchdog is managed by the secure world, SMC calls are used to interact with it. Signed-off-by: Gatien Chevallier --- arch/arm/boot/dts/st/stm32mp131.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/dts/st/stm32mp131.dtsi b/arch/arm/boot/dts/st/st= m32mp131.dtsi index a18da1a04fe3..6506b9109b90 100644 --- a/arch/arm/boot/dts/st/stm32mp131.dtsi +++ b/arch/arm/boot/dts/st/stm32mp131.dtsi @@ -29,6 +29,12 @@ arm-pmu { interrupt-parent =3D <&intc>; }; =20 + arm_wdt: watchdog { + compatible =3D "arm,smc-wdt"; + arm,smc-id =3D <0xbc000000>; + status =3D "disabled"; + }; + firmware { optee { method =3D "smc"; --=20 2.43.0 From nobody Thu Dec 18 18:01:31 2025 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AEA962D9496; Fri, 31 Oct 2025 10:01:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=91.207.212.93 ARC-Seal: i=2; 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Use the ARM SMC watchdog to communicate with it. Signed-off-by: Gatien Chevallier --- arch/arm/boot/dts/st/stm32mp135f-dk.dts | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm/boot/dts/st/stm32mp135f-dk.dts b/arch/arm/boot/dts/st= /stm32mp135f-dk.dts index 9764a6bfa5b4..f894ee35b3db 100644 --- a/arch/arm/boot/dts/st/stm32mp135f-dk.dts +++ b/arch/arm/boot/dts/st/stm32mp135f-dk.dts @@ -161,6 +161,11 @@ channel@12 { }; }; =20 +&arm_wdt { + timeout-sec =3D <32>; + status =3D "okay"; +}; + &crc1 { status =3D "okay"; }; --=20 2.43.0 From nobody Thu Dec 18 18:01:31 2025 Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 722ED2EDD58; Fri, 31 Oct 2025 10:01:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=185.132.182.106 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761904902; 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reg =3D <0x5a002000 0x400>; + interrupts =3D ; clocks =3D <&rcc IWDG2>, <&scmi_clk CK_SCMI_LSI>; clock-names =3D "pclk", "lsi"; status =3D "disabled"; --=20 2.43.0