tests: zephyr: boards: nrf: Add gppi test for nrf9251dk

Add zephyr test for gppi. Add configuration for nrf9251dk//cpuapp.

Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>

Author: nordic-krch

scripts/ci/tags.yaml

@@ -1814,6 +1814,11 @@ ci_tests_zephyr_boards_nrf_dmm:
     - nrf/tests/zephyr/boards/nrf/dmm/
     - zephyr/tests/boards/nrf/dmm/
 
+ci_tests_zephyr_boards_nrf_gppi:
+  files:
+    - nrf/tests/zephyr/boards/nrf/gppi/
+    - zephyr/tests/boards/nrf/gppi/
+
 ci_tests_zephyr_drivers_gpio:
   files:
     - nrf/tests/zephyr/drivers/gpio/

tests/zephyr/boards/nrf/gppi/CMakeLists.txt

@@ -0,0 +1,12 @@
+#
+# Copyright (c) 2026 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(gppi)
+
+target_sources(app PRIVATE ${ZEPHYR_BASE}/tests/boards/nrf/gppi/src/main.c)

tests/zephyr/boards/nrf/gppi/boards/nrf9251dk_nrf9251_cpuapp.overlay

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2026 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+
+dut_timer0: &timer130 {
+	status = "reserved";
+};
+
+dut_timer1: &timer131 {
+	status = "reserved";
+};
+
+dut_timer2: &timer132 {
+	status = "reserved";
+};
+
+&pdm0 {
+	status = "reserved";
+};

tests/zephyr/boards/nrf/gppi/prj.conf

@@ -0,0 +1,7 @@
+CONFIG_ZTEST=y
+CONFIG_NRFX_GPPI=y
+CONFIG_NRFX_GPPI_V1=n
+
+CONFIG_TEST_LOGGING_DEFAULTS=n
+CONFIG_LOG=y
+CONFIG_LOG_BUFFER_SIZE=8192

tests/zephyr/boards/nrf/gppi/testcase.yaml

@@ -0,0 +1,12 @@
+common:
+  tags:
+    - drivers
+    - ci_tests_zephyr_boards_nrf_gppi
+  harness: ztest
+
+tests:
+  nrf.extended.boards.nrf.gppi:
+    platform_allow:
+      - nrf9251dk/nrf9251/cpuapp
+    integration_platforms:
+      - nrf9251dk/nrf9251/cpuapp