dts: stm32n6: Add npu node and dts binding

Provide binding for `st,stm32-npu` compatible and node in SoC dtsi.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

dts/arm/st/n6/stm32n6.dtsi

@@ -852,6 +852,14 @@
 			resets = <&rctl STM32_RESET(APB5, 1)>;
 			status = "disabled";
 		};
+
+		npu: npu@580c0000 {
+			compatible = "st,stm32-npu";
+			reg = <0x580c0000 0x1000>;
+			clocks = <&rcc STM32_CLOCK(AHB5, 31)>;
+			resets = <&rctl STM32_RESET(AHB5, 31)>;
+			status = "disabled";
+		};
 	};
 };
 

dts/bindings/misc/st,stm32-npu.yaml

@@ -0,0 +1,18 @@
+# Copyright (c) 2025 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+description: STM32 Neural-ART accelerator
+
+compatible: "st,stm32-npu"
+
+include: [reset-device.yaml, base.yaml]
+
+properties:
+  reg:
+    required: true
+
+  clocks:
+    required: true
+
+  resets:
+    required: true