Use SYS_INIT for BLE and USB init.

app/Kconfig

@@ -15,12 +15,20 @@ config ZMK_KSCAN_EVENT_QUEUE_SIZE
 
 menu "HID Output Types"
 
-config ZMK_USB
+menuconfig ZMK_USB
 	bool "USB"
 	select USB
 	select USB_DEVICE_STACK
 	select USB_DEVICE_HID
 
+if ZMK_USB
+
+config ZMK_USB_INIT_PRIORITY
+	int "Init Priority"
+	default 50
+
+endif
+
 menuconfig ZMK_BLE
 	bool "BLE (HID over GATT)"
 	select BT
@@ -32,6 +40,10 @@ menuconfig ZMK_BLE
 
 if ZMK_BLE
 
+config ZMK_BLE_INIT_PRIORITY
+	int "Init Priority"
+	default 50
+
 # HID GATT notifications sent this way are *not* picked up by Linux, and possibly others.
 config BT_GATT_NOTIFY_MULTIPLE
 	default n

app/include/zmk/endpoints.h

@@ -3,5 +3,4 @@
 #include <zmk/keys.h>
 #include <zmk/hid.h>
 
-int zmk_endpoints_init();
 int zmk_endpoints_send_report(u8_t usage_report);

app/src/ble.c

@@ -1,4 +1,7 @@
 
+#include <device.h>
+#include <init.h>
+
 #include <math.h>
 
 #include <settings/settings.h>
@@ -139,7 +142,7 @@ static void zmk_ble_ready(int err)
     }
 }
 
-int zmk_ble_init()
+static int zmk_ble_init(struct device *_arg)
 {
     if (IS_ENABLED(CONFIG_SETTINGS))
     {
@@ -191,3 +194,7 @@ bool zmk_ble_handle_key_user(struct zmk_key_event *key_event)
 
     return false;
 }
+
+SYS_INIT(zmk_ble_init,
+        APPLICATION,
+        CONFIG_ZMK_BLE_INIT_PRIORITY);

app/src/endpoints.c

@@ -8,34 +8,6 @@
 #include <logging/log.h>
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
-int zmk_endpoints_init()
-{
-    int err;
-
-    LOG_DBG("");
-
-#ifdef CONFIG_ZMK_USB
-    err = zmk_usb_hid_init();
-    if (err)
-    {
-        LOG_ERR("USB HID Init Failed\n");
-        return err;
-    }
-#endif /* CONFIG_ZMK_USB */
-
-#ifdef CONFIG_ZMK_BLE
-    err = zmk_hog_init();
-    if (err)
-    {
-        LOG_ERR("HOG Init Failed\n");
-        return err;
-    }
-
-#endif /* CONFIG_ZMK_BLE */
-
-    return 0;
-}
-
 int zmk_endpoints_send_report(u8_t usage_page)
 {
     int err;

app/src/hog.c

@@ -7,11 +7,6 @@
 #include <zmk/hog.h>
 #include <zmk/hid.h>
 
-int zmk_hog_init()
-{
-    return zmk_ble_init();
-}
-
 enum
 {
     HIDS_REMOTE_WAKE = BIT(0),

app/src/main.c

@@ -27,11 +27,6 @@ void main(void)
 		return;
 	}
 
-	if (zmk_endpoints_init())
-	{
-		printk("ENDPOINT INIT FAILED\n");
-		return;
-	}
 
 #ifdef CONFIG_SETTINGS
 	settings_load();

app/src/usb_hid.c

@@ -1,5 +1,6 @@
 
 #include <device.h>
+#include <init.h>
 
 #include <usb/usb_device.h>
 #include <usb/class/usb_hid.h>
@@ -29,7 +30,7 @@ void usb_hid_status_cb(enum usb_dc_status_code status, const u8_t *params)
 	usb_status = status;
 };
 
-int zmk_usb_hid_init()
+static int zmk_usb_hid_init(struct device *_arg)
 {
 	int usb_enable_ret;
 
@@ -56,3 +57,7 @@ int zmk_usb_hid_init()
 
 	return 0;
 }
+
+SYS_INIT(zmk_usb_hid_init,
+         APPLICATION,
+		 CONFIG_ZMK_USB_INIT_PRIORITY);