tests: adc: Enable ADC tests for frdm_mcxc242 board

Enable ADC tests for frdm_mcxc242 board.

Signed-off-by: Michal Smola <[email protected]>

Author: michal-smola

tests/drivers/adc/adc_accuracy_test/boards/frdm_mcxc242.conf

@@ -0,0 +1 @@
+CONFIG_ADC_MCUX_ADC16_VREF_ALTERNATE=y

tests/drivers/adc/adc_accuracy_test/boards/frdm_mcxc242.overlay

@@ -0,0 +1,28 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright 2024 NXP
+ */
+
+ /* Please connect voltage reference to J6.AN pin to run the test. */
+
+/ {
+	zephyr,user {
+		io-channels = <&adc0 1>;
+		reference_mv = <1650>;
+	};
+};
+
+&adc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_VDD_1";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};

tests/drivers/adc/adc_accuracy_test/testcase.yaml

@@ -19,3 +19,4 @@ tests:
     platform_allow:
       - frdm_kl25z
       - ek_ra8m1
+      - frdm_mcxc242

tests/drivers/adc/adc_api/boards/frdm_mcxc242.conf

@@ -0,0 +1 @@
+CONFIG_ADC_MCUX_ADC16_VREF_ALTERNATE=y

tests/drivers/adc/adc_api/boards/frdm_mcxc242.overlay

@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright 2024 NXP
+ */
+
+/ {
+	zephyr,user {
+		io-channels = <&adc0 0>, <&adc0 1>;
+	};
+};
+
+&adc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_VDD_1";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+
+	channel@1 {
+		reg = <1>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_VDD_1";
+		zephyr,vref-mv = <3300>;
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+	};
+};