samples: drivers: audio: dmic: add from zephyr, support L20

Taken from zephyr with added support for L20.

Signed-off-by: Piotr Kosycarz <[email protected]>

CODEOWNERS

@@ -513,6 +513,7 @@
 /samples/debug/ppi_trace/                 @nordic-krch
 /samples/dect/dect_phy/dect_shell/        @jhirsi
 /samples/dect/dect_phy/hello_dect/        @nrfconnect/ncs-modem
+/samples/drivers/audio/dmic/              @nrfconnect/ncs-low-level-test
 /samples/edge_impulse/                    @nrfconnect/ncs-si-muffin
 /samples/esb/                             @nrfconnect/ncs-si-muffin
 /samples/event_manager_proxy/             @nrfconnect/ncs-si-muffin

samples/drivers/audio/dmic/CMakeLists.txt

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(dmic)
+
+target_sources(app PRIVATE $ENV{ZEPHYR_BASE}/samples/drivers/audio/dmic/src/main.c)

samples/drivers/audio/dmic/README.txt

@@ -0,0 +1,4 @@
+This sample extends the same-named Zephyr sample to verify it
+with Nordic development kits.
+
+Source code and basic configuration files can be found in the corresponding folder structure in zephyr/samples/drivers/audio/dmic.

samples/drivers/audio/dmic/boards/nrf54l20pdk_nrf54l20_cpuapp.overlay

@@ -0,0 +1,15 @@
+&pinctrl {
+	pdm20_default_alt: pdm20_default_alt {
+		group1 {
+			psels = <NRF_PSEL(PDM_CLK, 1, 10)>,
+				<NRF_PSEL(PDM_DIN, 1, 11)>;
+		};
+	};
+};
+
+dmic_dev: &pdm20 {
+	status = "okay";
+	pinctrl-0 = <&pdm20_default_alt>;
+	pinctrl-names = "default";
+	clock-source = "PCLK32M";
+};

samples/drivers/audio/dmic/prj.conf

@@ -0,0 +1,4 @@
+CONFIG_AUDIO=y
+CONFIG_AUDIO_DMIC=y
+
+CONFIG_LOG=y

samples/drivers/audio/dmic/sample.yaml

@@ -0,0 +1,17 @@
+sample:
+  name: DMIC sample
+tests:
+  nrf.extended.sample.drivers.audio.dmic:
+    tags:
+      - dmic
+      - ci_samples_drivers_audio_dmic
+    filter: dt_nodelabel_enabled("dmic_dev")
+    integration_platforms:
+      - nrf54l20pdk/nrf54l20/cpuapp
+    harness: console
+    harness_config:
+      type: multi_line
+      ordered: true
+      regex:
+        - "DMIC sample"
+        - "Exiting"

scripts/ci/tags.yaml

@@ -1525,3 +1525,8 @@ ci_samples_subsys_settings:
   files:
     - nrf/samples/subsys/settings/
     - zephyr/samples/subsys/settings/
+
+ci_samples_drivers_audio_dmic:
+  files:
+    - nrf/samples/drivers/audio/dmic/
+    - zephyr/samples/drivers/audio/dmic/