dts: arm: silabs: add IADC node for xg21 soc

This commit introduces a new ADC node for the Silabs Incremental ADC
(IADC) in the device tree source file for the xg21 soc.

Signed-off-by: Martin Hoff <[email protected]>

Author: Martinhoff-maker

dts/arm/silabs/xg21/xg21.dtsi

@@ -13,6 +13,7 @@
 #include <zephyr/dt-bindings/dma/silabs/xg21-dma.h>
 #include <zephyr/dt-bindings/gpio/gpio.h>
 #include <zephyr/dt-bindings/i2c/i2c.h>
+#include <zephyr/dt-bindings/adc/adc.h>
 
 / {
 	chosen {
@@ -394,6 +395,16 @@
 			};
 		};
 
+		adc0: adc@5a004000 {
+			compatible = "silabs,iadc";
+			reg = <0x5a004000 0x4000>;
+			interrupts = <50 2>;
+			interrupt-names = "iadc0";
+			clocks = <&cmu CLOCK_AUTO CLOCK_BRANCH_PCLK>;
+			status = "disabled";
+			#io-channel-cells = <1>;
+		};
+
 		usart0: usart@50058000 {
 			compatible = "silabs,usart-uart";
 			reg = <0x50058000 0x4000>;