tests: drivers: audio: pdm_loopback: Run on nRF54LM20A PDK

Add overlay that defines correct loopback to run the test
on nRF54LM20A PDK.

Signed-off-by: Sebastian Głąb <[email protected]>

Author: nordic-segl

tests/drivers/audio/pdm_loopback/boards/nrf54lm20apdk_nrf54lm20a_cpuapp.overlay

@@ -4,20 +4,24 @@
  * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
  */
 
+/* Test requires loopback between P1.18 and P1.24.
+ * For best performance, PDM_CLK shall be on 'Clock pin'.
+ */
+
 / {
 	gpio_test {
 		compatible = "gpio-leds";
 		pulse_counter: pulse_counter {
-			gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio1 24 GPIO_ACTIVE_HIGH>;
 		};
 	};
 };
 
 &pinctrl {
 	pdm20_default_alt: pdm20_default_alt {
 		group1 {
-			psels = <NRF_PSEL(PDM_CLK, 1, 10)>,
-				<NRF_PSEL(PDM_DIN, 1, 12)>;
+			psels = <NRF_PSEL(PDM_CLK, 1, 18)>,
+				<NRF_PSEL(PDM_DIN, 1, 19)>;
 		};
 	};
 };

tests/drivers/audio/pdm_loopback/boards/nrf54lm20apdk_nrf54lm20a_cpuapp_0_0_0.overlay

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2025 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+/* Test requires loopback between P1.11 and P1.10.
+ * For best performance, PDM_CLK shall be on 'Clock pin'.
+ */
+
+/ {
+	gpio_test {
+		compatible = "gpio-leds";
+		pulse_counter: pulse_counter {
+			gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&pinctrl {
+	pdm20_default_alt: pdm20_default_alt {
+		group1 {
+			psels = <NRF_PSEL(PDM_CLK, 1, 10)>,
+				<NRF_PSEL(PDM_DIN, 1, 12)>;
+		};
+	};
+};
+
+pdm_dev: &pdm20 {
+	status = "okay";
+	pinctrl-0 = <&pdm20_default_alt>;
+	pinctrl-names = "default";
+	clock-source = "PCLK32M";
+};
+
+&gpio1 {
+	status = "okay";
+};
+
+&timer00 {
+	status = "okay";
+};

tests/drivers/audio/pdm_loopback/testcase.yaml

@@ -13,11 +13,13 @@ tests:
       - nrf54l15dk/nrf54l15/cpuapp
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     extra_args: CONFIG_NRFX_TIMER00=y
   drivers.audio.pdm_loopback.nrf54l20.1000khz:
     platform_allow:
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     extra_args:
       - CONFIG_NRFX_TIMER00=y
       - CONFIG_TEST_PDM_SAMPLING_RATE=20000
@@ -26,6 +28,7 @@ tests:
       - nrf54l15dk/nrf54l15/cpuapp
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     extra_args:
       - CONFIG_NRFX_TIMER00=y
       - CONFIG_TEST_PDM_SAMPLING_RATE=16000
@@ -35,6 +38,7 @@ tests:
       - nrf54l15dk/nrf54l15/cpuapp
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     extra_args:
       - CONFIG_NRFX_TIMER00=y
       - CONFIG_TEST_PDM_SAMPLING_RATE=32000
@@ -43,6 +47,7 @@ tests:
     platform_allow:
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     extra_args:
       - CONFIG_NRFX_TIMER00=y
       - CONFIG_TEST_PDM_SAMPLING_RATE=20000
@@ -51,6 +56,7 @@ tests:
     platform_allow:
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     extra_args:
       - CONFIG_NRFX_TIMER00=y
       - CONFIG_TEST_PDM_SAMPLING_RATE=16000
@@ -60,6 +66,7 @@ tests:
     platform_allow:
       - nrf54l20pdk/nrf54l20/cpuapp
       - nrf54lm20apdk/nrf54lm20a/cpuapp
+      - [email protected]/nrf54lm20a/cpuapp
     extra_args:
       - CONFIG_NRFX_TIMER00=y
       - CONFIG_TEST_PDM_SAMPLING_RATE=32000