fix: Adjustments for Zephyr 3.5.

app/Kconfig

@@ -391,6 +391,7 @@ config ZMK_SLEEP
     bool "Enable deep sleep support"
     depends on HAS_POWEROFF
     select POWEROFF
+    select ZMK_PM_DEVICE_SUSPEND_RESUME
     imply USB
 
 if ZMK_SLEEP
@@ -412,10 +413,15 @@ config ZMK_EXT_POWER
 config ZMK_PM
     bool
 
+config ZMK_PM_DEVICE_SUSPEND_RESUME
+    bool
+    select ZMK_PM
+
 config ZMK_PM_SOFT_OFF
     bool "Soft-off support"
     select ZMK_PM
     select PM_DEVICE
+    select ZMK_PM_DEVICE_SUSPEND_RESUME
 
 config ZMK_GPIO_KEY_WAKEUP_TRIGGER
     bool "Hardware supported wakeup (GPIO)"

app/include/zmk/pm.h

@@ -6,4 +6,7 @@
 
 #pragma once
 
+int zmk_pm_suspend_devices(void);
+void zmk_pm_resume_devices(void);
+
 int zmk_pm_soft_off(void);

app/src/activity.c

@@ -7,8 +7,6 @@
 #include <zephyr/device.h>
 #include <zephyr/init.h>
 #include <zephyr/kernel.h>
-#include <zephyr/pm/device.h>
-#include <zephyr/pm/device_runtime.h>
 #include <zephyr/sys/poweroff.h>
 
 #include <zephyr/logging/log.h>
@@ -20,69 +18,14 @@ LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 #include <zmk/events/position_state_changed.h>
 #include <zmk/events/sensor_event.h>
 
+#include <zmk/pm.h>
+
 #include <zmk/activity.h>
 
 #if IS_ENABLED(CONFIG_USB_DEVICE_STACK)
 #include <zmk/usb.h>
 #endif
 
-// Reimplement some of the device work from Zephyr PM to work with the new `sys_poweroff` API.
-// TODO: Tweak this to smarter runtime PM of subsystems on sleep.
-
-#ifdef CONFIG_PM_DEVICE
-TYPE_SECTION_START_EXTERN(const struct device *, zmk_pm_device_slots);
-
-#if !defined(CONFIG_PM_DEVICE_RUNTIME_EXCLUSIVE)
-/* Number of devices successfully suspended. */
-static size_t zmk_num_susp;
-
-static int zmk_pm_suspend_devices(void) {
-    const struct device *devs;
-    size_t devc;
-
-    devc = z_device_get_all_static(&devs);
-
-    zmk_num_susp = 0;
-
-    for (const struct device *dev = devs + devc - 1; dev >= devs; dev--) {
-        int ret;
-
-        /*
-         * Ignore uninitialized devices, busy devices, wake up sources, and
-         * devices with runtime PM enabled.
-         */
-        if (!device_is_ready(dev) || pm_device_is_busy(dev) || pm_device_state_is_locked(dev) ||
-            pm_device_wakeup_is_enabled(dev) || pm_device_runtime_is_enabled(dev)) {
-            continue;
-        }
-
-        ret = pm_device_action_run(dev, PM_DEVICE_ACTION_SUSPEND);
-        /* ignore devices not supporting or already at the given state */
-        if ((ret == -ENOSYS) || (ret == -ENOTSUP) || (ret == -EALREADY)) {
-            continue;
-        } else if (ret < 0) {
-            LOG_ERR("Device %s did not enter %s state (%d)", dev->name,
-                    pm_device_state_str(PM_DEVICE_STATE_SUSPENDED), ret);
-            return ret;
-        }
-
-        TYPE_SECTION_START(zmk_pm_device_slots)[zmk_num_susp] = dev;
-        zmk_num_susp++;
-    }
-
-    return 0;
-}
-
-static void zmk_pm_resume_devices(void) {
-    for (int i = (zmk_num_susp - 1); i >= 0; i--) {
-        pm_device_action_run(TYPE_SECTION_START(zmk_pm_device_slots)[i], PM_DEVICE_ACTION_RESUME);
-    }
-
-    zmk_num_susp = 0;
-}
-#endif /* !CONFIG_PM_DEVICE_RUNTIME_EXCLUSIVE */
-#endif /* CONFIG_PM_DEVICE */
-
 bool is_usb_power_present(void) {
 #if IS_ENABLED(CONFIG_USB_DEVICE_STACK)
     return zmk_usb_is_powered();

app/src/behaviors/behavior_soft_off.c

@@ -64,7 +64,7 @@ static const struct behavior_driver_api behavior_soft_off_driver_api = {
     };                                                                                             \
     static struct behavior_soft_off_data bso_data_##n = {};                                        \
     BEHAVIOR_DT_INST_DEFINE(0, behavior_soft_off_init, NULL, &bso_data_##n, &bso_config_##n,       \
-                            APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,                      \
+                            POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,                      \
                             &behavior_soft_off_driver_api);
 
 DT_INST_FOREACH_STATUS_OKAY(BSO_INST)

app/src/pm.c

@@ -8,13 +8,72 @@
 #include <zephyr/devicetree.h>
 #include <zephyr/init.h>
 #include <zephyr/pm/device.h>
+#include <zephyr/pm/device_runtime.h>
 #include <zephyr/pm/pm.h>
+#include <zephyr/sys/poweroff.h>
 
 #include <zephyr/logging/log.h>
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
 #include <zmk/endpoints.h>
 
+// Reimplement some of the device work from Zephyr PM to work with the new `sys_poweroff` API.
+// TODO: Tweak this to smarter runtime PM of subsystems on sleep.
+
+#ifdef CONFIG_ZMK_PM_DEVICE_SUSPEND_RESUME
+TYPE_SECTION_START_EXTERN(const struct device *, zmk_pm_device_slots);
+
+#if !defined(CONFIG_PM_DEVICE_RUNTIME_EXCLUSIVE)
+/* Number of devices successfully suspended. */
+static size_t zmk_num_susp;
+
+int zmk_pm_suspend_devices(void) {
+    const struct device *devs;
+    size_t devc;
+
+    devc = z_device_get_all_static(&devs);
+
+    zmk_num_susp = 0;
+
+    for (const struct device *dev = devs + devc - 1; dev >= devs; dev--) {
+        int ret;
+
+        /*
+         * Ignore uninitialized devices, busy devices, wake up sources, and
+         * devices with runtime PM enabled.
+         */
+        if (!device_is_ready(dev) || pm_device_is_busy(dev) || pm_device_state_is_locked(dev) ||
+            pm_device_wakeup_is_enabled(dev) || pm_device_runtime_is_enabled(dev)) {
+            continue;
+        }
+
+        ret = pm_device_action_run(dev, PM_DEVICE_ACTION_SUSPEND);
+        /* ignore devices not supporting or already at the given state */
+        if ((ret == -ENOSYS) || (ret == -ENOTSUP) || (ret == -EALREADY)) {
+            continue;
+        } else if (ret < 0) {
+            LOG_ERR("Device %s did not enter %s state (%d)", dev->name,
+                    pm_device_state_str(PM_DEVICE_STATE_SUSPENDED), ret);
+            return ret;
+        }
+
+        TYPE_SECTION_START(zmk_pm_device_slots)[zmk_num_susp] = dev;
+        zmk_num_susp++;
+    }
+
+    return 0;
+}
+
+void zmk_pm_resume_devices(void) {
+    for (int i = (zmk_num_susp - 1); i >= 0; i--) {
+        pm_device_action_run(TYPE_SECTION_START(zmk_pm_device_slots)[i], PM_DEVICE_ACTION_RESUME);
+    }
+
+    zmk_num_susp = 0;
+}
+#endif /* !CONFIG_PM_DEVICE_RUNTIME_EXCLUSIVE */
+#endif /* CONFIG_ZMK_PM_DEVICE_SUSPEND_RESUME */
+
 #if IS_ENABLED(CONFIG_ZMK_PM_SOFT_OFF)
 
 #define HAS_WAKERS DT_HAS_COMPAT_STATUS_OKAY(zmk_soft_off_wakeup_sources)
@@ -64,8 +123,15 @@ int zmk_pm_soft_off(void) {
     }
 #endif // HAS_WAKERS
 
+    int err = zmk_pm_suspend_devices();
+    if (err < 0) {
+        zmk_pm_resume_devices();
+        return err;
+    }
+
     LOG_DBG("soft-off: go to sleep");
-    return pm_state_force(0U, &(struct pm_state_info){PM_STATE_SOFT_OFF, 0, 0});
+    sys_poweroff();
+    return 0;
 }
 
 #endif // IS_ENABLED(CONFIG_ZMK_PM_SOFT_OFF)