ARM: dts: stm32: add the ARM SMC watchdog in stm32mp131.dtsi

Add the arm_wdt node in the stm32mp131.dtsi SoC device tree file. When
the platform watchdog is managed by the secure world, SMC calls are used
to interact with it.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Link: https://lore.kernel.org/r/20251031-iwdg1-v2-2-2dc6e0116725@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

diff --git a/arch/arm/boot/dts/st/stm32mp131.dtsi b/arch/arm/boot/dts/st/stm32mp131.dtsi
index a18da1a04fe3537f4fdc2d76a9ec7e6bd9d2cd1b..6506b9109b90a01a89623d100c4b8ef26393f92c 100644 (file)
--- a/arch/arm/boot/dts/st/stm32mp131.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp131.dtsi
@@ -29,6 +29,12 @@
                interrupt-parent = <&intc>;
        };
 
+       arm_wdt: watchdog {
+               compatible = "arm,smc-wdt";
+               arm,smc-id = <0xbc000000>;
+               status = "disabled";
+       };
+
        firmware {
                optee {
                        method = "smc";