tests: audio: dmic_api: enable frdm_mcxn236 PDM test

enable frdm_mcxn236 PDM test

Signed-off-by: Zhaoxiang Jin <[email protected]>

Author: ZhaoxiangJin

tests/drivers/audio/dmic_api/boards/frdm_mcxn236.overlay

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	aliases {
+		dmic-dev = &pdm;
+	};
+};
+
+&pdm {
+	status = "okay";
+
+	channel0: pdm-channel@0 {
+		status = "okay";
+	};
+
+	channel1: pdm-channel@1 {
+		status = "okay";
+	};
+};

tests/drivers/audio/dmic_api/src/main.c

@@ -27,6 +27,12 @@ static const struct device *dmic_dev = DEVICE_DT_GET(DT_ALIAS(dmic_dev));
 #define BYTES_PER_SAMPLE sizeof(int16_t)
 #define SLAB_ALIGN 4
 #define MAX_SAMPLE_RATE  48000
+#elif DT_HAS_COMPAT_STATUS_OKAY(nxp_pdm)
+#define PDM_CHANNELS 2
+#define SAMPLE_BIT_WIDTH 24
+#define BYTES_PER_SAMPLE 3
+#define SLAB_ALIGN 4
+#define MAX_SAMPLE_RATE  16000
 #else
 #error "Unsupported DMIC device"
 #endif