linux-kernel - [PATCH 3/4] ARM: dts: stm32: enable the ARM SMC watchdog node in stm32mp135f-dk

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Message-ID: <20250918-iwdg1-v1-3-02c2543c01a5@foss.st.com>
Date: Thu, 18 Sep 2025 17:35:40 +0200
From: Gatien Chevallier <gatien.chevallier@...s.st.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin
	<mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
CC: <devicetree@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        Gatien Chevallier <gatien.chevallier@...s.st.com>
Subject: [PATCH 3/4] ARM: dts: stm32: enable the ARM SMC watchdog node in
 stm32mp135f-dk

On the stm32mp135f-dk board, the IWDG1 is secured and used to monitor
the cortex-A7. Use the ARM SMC watchdog to communicate with it.

Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
---
 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 9764a6bfa5b428c8524a5902c10b7807dda46b3d..f894ee35b3db2c915896cdf47a7a197951e0e21a 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 {
 	};
 };
 
+&arm_wdt {
+	timeout-sec = <32>;
+	status = "okay";
+};
+
 &crc1 {
 	status = "okay";
 };

-- 
2.25.1