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diff --git a/sys/compat/linuxkpi/common/include/linux/pm_runtime.h b/sys/compat/linuxkpi/common/include/linux/pm_runtime.h
--- a/sys/compat/linuxkpi/common/include/linux/pm_runtime.h
+++ b/sys/compat/linuxkpi/common/include/linux/pm_runtime.h
@@ -1,60 +1,164 @@
-/* Public domain. */
+/*
+ * Copyright (c) 2026 The FreeBSD Foundation
+ *
+ * Portions of this software were developed by Björn Zeeb
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
#ifndef _LINUXKPI_LINUX_PM_RUNTIME_H_
#define _LINUXKPI_LINUX_PM_RUNTIME_H_
+#include <linux/kernel.h> /* pr_debug */
#include <linux/device.h>
#include <linux/pm.h>
-#define pm_runtime_mark_last_busy(x) (void)(x)
-#define pm_runtime_use_autosuspend(x) (void)(x)
-#define pm_runtime_dont_use_autosuspend(x) (void)(x)
-#define pm_runtime_put_autosuspend(x) (void)(x)
-#define pm_runtime_set_autosuspend_delay(x, y) (void)(x); (void)(y)
-#define pm_runtime_set_active(x) (void)(x)
-#define pm_runtime_allow(x) (void)(x)
-#define pm_runtime_put_noidle(x) (void)(x)
-#define pm_runtime_forbid(x) (void)(x)
-#define pm_runtime_get_noresume(x) (void)(x)
-#define pm_runtime_put(x) (void)(x)
-#define pm_runtime_enable(x) (void)(x)
-#define pm_runtime_disable(x) (void)(x)
-#define pm_runtime_autosuspend(x) (void)(x)
-#define pm_runtime_resume(x) (void)(x)
+/*
+ * Return values, where needed, are based on the !CONFIG_PM/!CONFIG_PM_SLEEP
+ * assumption given we currently do not support anything in here.
+ * We could #error in case CONFIG_PM or CONFIG_PM_SLEEP are set but that
+ * would likely be too intrusive for now.
+ *
+ * We could likely use dev_dbg() in here instead of pr_debug() if the former
+ * would be mapped to the latter with additional dev information.
+ */
+
+static inline void
+pm_runtime_enable(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline void
+pm_runtime_disable(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline void
+pm_runtime_allow(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline void
+pm_runtime_forbid(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+
+static inline void
+pm_runtime_mark_last_busy(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline void
+pm_runtime_get_noresume(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline void
+pm_runtime_put_noidle(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline bool
+pm_runtime_suspended(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+ return (false);
+}
static inline int
-pm_runtime_get_sync(struct device *dev)
+pm_runtime_autosuspend(struct device *dev)
+{
+ pm_runtime_mark_last_busy(dev);
+ pr_debug("%s TODO\n", __func__);
+ return (-ENOSYS);
+}
+
+static inline void
+pm_runtime_use_autosuspend(struct device *dev __unused)
{
- return 0;
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline void
+pm_runtime_dont_use_autosuspend(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
+static inline void
+pm_runtime_set_autosuspend_delay(struct device *dev __unused, int delay __unused)
+{
+ pr_debug("%s TODO\n", __func__);
}
static inline int
-pm_runtime_get_if_in_use(struct device *dev)
+pm_runtime_put_autosuspend(struct device *dev)
{
- return 1;
+ pm_runtime_mark_last_busy(dev);
+ pr_debug("%s TODO\n", __func__);
+ return (-ENOSYS);
}
-#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION < 60900
static inline int
-pm_runtime_get_if_active(struct device *dev, bool x)
-#else
+pm_runtime_set_active(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+ return (0);
+}
+
+static inline void
+pm_runtime_put(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+}
+
static inline int
-pm_runtime_get_if_active(struct device *dev)
-#endif
+pm_runtime_resume(struct device *dev __unused)
{
- return 1;
+ pr_debug("%s TODO\n", __func__);
+ return (1);
}
static inline int
-pm_runtime_suspended(struct device *dev)
+pm_runtime_get_sync(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+ return (1);
+}
+
+static inline int
+pm_runtime_get_if_in_use(struct device *dev __unused)
+{
+ pr_debug("%s TODO\n", __func__);
+ return (-EINVAL);
+}
+
+#if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION < 60900
+static inline int
+pm_runtime_get_if_active(struct device *dev __unused, bool x __unused)
+#else
+static inline int
+pm_runtime_get_if_active(struct device *dev __unused)
+#endif
{
- return 0;
+ pr_debug("%s TODO\n", __func__);
+ return (-EINVAL);
}
static inline int
-pm_runtime_resume_and_get(struct device *dev)
+pm_runtime_resume_and_get(struct device *dev __unused)
{
- return 0;
+ pr_debug("%s TODO\n", __func__);
+ return (1);
}
#endif /* _LINUXKPI_LINUX_PM_RUNTIME_H_ */

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