tests: adc: Adding Infineon AutAnalog ADC driver tests

Adding files to allow running the following tests for the Infineon
AutAnalog SAR ADC driver on the PSOC Edge family of MCUs:
  * tests/drivers/adc/adc_api
  * tests/drivers/adc/adc_error_cases

Signed-off-by: John Batch <[email protected]>

Author: jsbatch

tests/drivers/adc/adc_api/boards/kit_pse84_eval_pse846gps2dbzc4a_m55.overlay

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2025 Infineon Technologies AG,
+ * or an affiliate of Infineon Technologies AG.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/adc/adc.h>
+
+/ {
+	 zephyr,user {
+		 io-channels = <&adc0 0>, <&adc0 1>;
+	};
+};
+
+&adc0 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 1)>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,resolution = <12>;
+		zephyr,input-positive = <0>;   /* P10.0 */
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_MICROSECONDS, 1)>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,resolution = <12>;
+		zephyr,input-positive = <1>;   /* P10.1 */
+	};
+};

tests/drivers/adc/adc_error_cases/boards/kit_pse84_eval_pse846gps2dbzc4a_m55.overlay

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2025 Infineon Technologies AG,
+ * or an affiliate of Infineon Technologies AG.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/adc/adc.h>
+
+/ {
+	aliases {
+		adc = &adc0;
+	};
+};
+
+&adc0 {
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,resolution = <12>;
+		zephyr,input-positive = <1>;   /* Analog Input 1 */
+	};
+};