arm64: dts: st: add arm-wdt node for watchdog support on stm32mp251

Add the node to use the ARM SMC watchdog support. It will
use a dedicated smc-id to configure and kick the watchdog.

Signed-off-by: Lionel Debieve <lionel.debieve@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index d7cb05d534ac9184ec5aceb66dc8091d21d44dee..124403f5f1f4971b44136770322f953c4ce6ee32 100644 (file)
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -28,6 +28,12 @@
                interrupt-parent = <&intc>;
        };
 
+       arm_wdt: watchdog {
+               compatible = "arm,smc-wdt";
+               arm,smc-id = <0xb200005a>;
+               status = "disabled";
+       };
+
        clocks {
                ck_flexgen_08: ck-flexgen-08 {
                        #clock-cells = <0>;