dts: arm: st: u3: add adc node in dtsi file

all stm32u3 boards have only one and same
adc peripheral.

Signed-off-by: Khaoula Bidani <[email protected]>

Author: kbidani

dts/arm/st/u3/stm32u3.dtsi

@@ -5,6 +5,8 @@
  */
 
 #include <arm/armv8-m.dtsi>
+#include <zephyr/dt-bindings/adc/adc.h>
+#include <zephyr/dt-bindings/adc/stm32u5_adc.h>
 #include <zephyr/dt-bindings/clock/stm32u3_clock.h>
 #include <zephyr/dt-bindings/gpio/gpio.h>
 #include <zephyr/dt-bindings/reset/stm32u3_reset.h>
@@ -232,6 +234,38 @@
 			status = "disabled";
 		};
 
+		adc1: adc@42028000 {
+			compatible = "st,stm32n6-adc", "st,stm32-adc";
+			reg = <0x42028000 0x400>;
+			clocks = <&rcc STM32_CLOCK(AHB2, 10)>;
+			interrupts = <37 0>;
+			#io-channel-cells = <1>;
+			resolutions = <STM32_ADC_RES(12, 0x00)
+				       STM32_ADC_RES(10, 0x01)
+				       STM32_ADC_RES(8, 0x02)
+				       STM32_ADC_RES(6, 0x03)>;
+			sampling-times = <2 3 7 12 24 47 247 1500>;
+			st,adc-sequencer = "FULLY_CONFIGURABLE";
+			st,adc-oversampler = "OVERSAMPLER_EXTENDED";
+			status = "disabled";
+		};
+
+		adc2: adc@42028100 {
+			compatible = "st,stm32n6-adc", "st,stm32-adc";
+			reg = <0x42028100 0x400>;
+			clocks = <&rcc STM32_CLOCK(AHB2, 10)>;
+			interrupts = <113 0>;
+			#io-channel-cells = <1>;
+			resolutions = <STM32_ADC_RES(12, 0x00)
+				       STM32_ADC_RES(10, 0x01)
+				       STM32_ADC_RES(8, 0x02)
+				       STM32_ADC_RES(6, 0x03)>;
+			sampling-times = <2 3 7 12 24 47 247 1500>;
+			st,adc-sequencer = "FULLY_CONFIGURABLE";
+			st,adc-oversampler = "OVERSAMPLER_EXTENDED";
+			status = "disabled";
+		};
+
 		dac1: dac@42028400 {
 			compatible = "st,stm32-dac";
 			reg = <0x42028400 0x400>;