From: Yann Gautier <yann.gautier@foss.st.com>
Date: Wed, 20 May 2026 16:07:15 +0000 (+0200)
Subject: ARM: dts: stm32: enable SMC watchdog for STM32MP15 SCMI config
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=d6ddbbb0008c4e59c5ce4c9d94265db966368462;p=thirdparty%2Fu-boot.git

ARM: dts: stm32: enable SMC watchdog for STM32MP15 SCMI config

For this configuration, the watchdog (iwdg1) is secured and managed by
OP-TEE. Add an watchdog node with arm,smc-wdt compatible, and disable
iwdg2 node which is then no more used.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
---

diff --git a/arch/arm/dts/stm32mp15-scmi-u-boot.dtsi b/arch/arm/dts/stm32mp15-scmi-u-boot.dtsi
index 79494ecad90..600316205fc 100644
--- a/arch/arm/dts/stm32mp15-scmi-u-boot.dtsi
+++ b/arch/arm/dts/stm32mp15-scmi-u-boot.dtsi
@@ -21,6 +21,13 @@
 		pinctrl1 = &pinctrl_z;
 	};
 
+	arm_wdt: watchdog {
+		compatible = "arm,smc-wdt";
+		arm,smc-id = <0xbc000000>;
+		timeout-sec = <32>;
+		status = "okay";
+	};
+
 	binman: binman {
 		multiple-images;
 	};
@@ -103,7 +110,7 @@
 };
 
 &iwdg2 {
-	bootph-all;
+	status = "disabled";
 };
 
 /* pre-reloc probe = reserve video frame buffer in video_reserve() */