tests: drivers: hwspinlock: Add dt_spec test

drivers/hwspinlock/CMakeLists.txt

@@ -3,3 +3,4 @@
 zephyr_library()
 
 zephyr_library_sources_ifdef(CONFIG_SQN_HWSPINLOCK sqn_hwspinlock.c)
+zephyr_library_sources_ifdef(CONFIG_HWSPINLOCK_TEST hwspinlock_test.c)

drivers/hwspinlock/Kconfig

@@ -22,6 +22,7 @@ config HWSPINLOCK_INIT_PRIORITY
 
 # zephyr-keep-sorted-start
 source "drivers/hwspinlock/Kconfig.sqn"
+source "drivers/hwspinlock/Kconfig.test"
 # zephyr-keep-sorted-stop
 
 endif

drivers/hwspinlock/Kconfig.test

@@ -0,0 +1,6 @@
+# Copyright (c) 2025 Analog Devices, Inc.
+# SPDX-License-Identifier: Apache-2.0
+#
+config HWSPINLOCK_TEST
+	def_bool DT_HAS_VND_HWSPINLOCK_ENABLED
+	depends on DT_HAS_VND_HWSPINLOCK_ENABLED

drivers/hwspinlock/hwspinlock_test.c

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2025 Analog Devices, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/drivers/hwspinlock.h>
+
+#define DT_DRV_COMPAT vnd_hwspinlock
+
+static void vnd_hwspinlock_lock(const struct device *dev, uint32_t id)
+{
+}
+
+static void vnd_hwspinlock_unlock(const struct device *dev, uint32_t id)
+{
+}
+
+static uint32_t vnd_hwspinlock_get_max_id(const struct device *dev)
+{
+	return 0;
+}
+
+static DEVICE_API(hwspinlock, vnd_hwspinlock_api) = {
+	.lock = vnd_hwspinlock_lock,
+	.unlock = vnd_hwspinlock_unlock,
+	.get_max_id = vnd_hwspinlock_get_max_id,
+};
+
+#define VND_HWSPINLOCK_INIT(idx)					\
+	DEVICE_DT_INST_DEFINE(idx, NULL, NULL, NULL, NULL, POST_KERNEL,	\
+			      CONFIG_HWSPINLOCK_INIT_PRIORITY,		\
+			      &vnd_hwspinlock_api)
+
+DT_INST_FOREACH_STATUS_OKAY(VND_HWSPINLOCK_INIT);

dts/bindings/test/vnd,hwspinlock-device.yaml

@@ -0,0 +1,12 @@
+# Copyright (c) 2025 Analog Devices, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+description: Test hardware spinlock device node
+
+compatible: "vnd,hwspinlock-device"
+
+include: base.yaml
+
+properties:
+  hwlocks:
+    required: true

dts/bindings/test/vnd,hwspinlock.yaml

@@ -0,0 +1,11 @@
+# Copyright (c) 2025 Analog Devices, Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+description: Test hardware spinlock node
+
+compatible: "vnd,hwspinlock"
+
+include: [base.yaml, hwspinlock-controller.yaml]
+
+hwlock-cells:
+  - id

tests/lib/devicetree/api_ext/app.overlay

@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2021, Commonwealth Scientific and Industrial Research
  * Organisation (CSIRO) ABN 41 687 119 230.
+ * Copyright (c) 2025 Analog Devices, Inc.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -21,6 +22,7 @@
 			reg = <0x20000000 0x1000>;
 			zephyr,memory-region = "SRAM_REGION";
 		};
+
 		test_sram2: sram@20001000 {
 			compatible = "zephyr,memory-region", "mmio-sram";
 			reg = <0x20001000 0x1000>;
@@ -74,5 +76,18 @@
 			mboxes = <&test_mbox 1>, <&test_mbox 2>, <&test_mbox_zero_cell>;
 			mbox-names = "tx", "rx", "zero";
 		};
+
+		test_hwspinlock: hwspinlock {
+			compatible = "vnd,hwspinlock";
+			#hwlock-cells = <1>;
+			status = "okay";
+		};
+
+		test_hwspinlock_dev: hwspinlock-dev {
+			compatible = "vnd,hwspinlock-device";
+			hwlocks = <&test_hwspinlock 1>, <&test_hwspinlock 2>;
+			hwlock-names = "rd", "wr";
+			status = "okay";
+		};
 	};
 };

tests/lib/devicetree/api_ext/prj.conf

@@ -1,3 +1,5 @@
 CONFIG_ZTEST=y
 CONFIG_ADC=y
 CONFIG_MBOX=y
+CONFIG_HWSPINLOCK=y
+CONFIG_SPIN_VALIDATE=n

tests/lib/devicetree/api_ext/src/main.c

@@ -1,6 +1,7 @@
 /*
  * Copyright (c) 2021, Commonwealth Scientific and Industrial Research
  * Organisation (CSIRO) ABN 41 687 119 230.
+ * Copyright (c) 2025 Analog Devices, Inc.
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -11,6 +12,7 @@
 #include <zephyr/drivers/gpio.h>
 #include <zephyr/drivers/adc.h>
 #include <zephyr/drivers/mbox.h>
+#include <zephyr/drivers/hwspinlock.h>
 
 #include <zephyr/linker/devicetree_regions.h>
 
@@ -59,4 +61,37 @@ ZTEST(devicetree_api_ext, test_mbox_dt_spec)
 	zassert_equal(channel_zero.channel_id, 0, "");
 }
 
+#define TEST_HWSPINLOCK \
+	DT_NODELABEL(test_hwspinlock)
+
+#define TEST_HWSPINLOCK_DEV \
+	DT_NODELABEL(test_hwspinlock_dev)
+
+#define HWSPINLOCK_BY_IDX(node_id, prop, idx) \
+	HWSPINLOCK_DT_SPEC_GET_BY_IDX(node_id, idx)
+
+static const struct hwspinlock_dt_spec spec[] = {
+	DT_FOREACH_PROP_ELEM_SEP(TEST_HWSPINLOCK_DEV, hwlocks, HWSPINLOCK_BY_IDX, (,))
+};
+
+static const struct hwspinlock_dt_spec rd =
+	HWSPINLOCK_DT_SPEC_GET_BY_NAME(TEST_HWSPINLOCK_DEV, rd);
+
+static const struct hwspinlock_dt_spec wr =
+	HWSPINLOCK_DT_SPEC_GET_BY_NAME(TEST_HWSPINLOCK_DEV, wr);
+
+ZTEST(devicetree_api_ext, test_hwspinlock_dt_spec)
+{
+	for (int i = 0; i < ARRAY_SIZE(spec); i++) {
+		zassert_equal(spec[i].dev, DEVICE_DT_GET(TEST_HWSPINLOCK));
+		zassert_equal(spec[i].id, i + 1);
+	}
+
+	zassert_equal(rd.dev, DEVICE_DT_GET(TEST_HWSPINLOCK));
+	zassert_equal(rd.id, 1);
+
+	zassert_equal(wr.dev, DEVICE_DT_GET(TEST_HWSPINLOCK));
+	zassert_equal(wr.id, 2);
+}
+
 ZTEST_SUITE(devicetree_api_ext, NULL, NULL, NULL, NULL, NULL);