1 files changed, 63 insertions, 0 deletions
diff --git a/components/drivers/serial/serial_tty.c b/components/drivers/serial/serial_tty.c
index 36692a9300..f75123eba2 100644
--- a/components/drivers/serial/serial_tty.c
+++ b/components/drivers/serial/serial_tty.c
@@ -404,3 +404,66 @@ static int _tty_workqueue_init(void)
     return RT_EOK;
 }
 INIT_PREV_EXPORT(_tty_workqueue_init);
+
+static rt_err_t _match_tty_iter(struct rt_object *obj, void *data)
+{
+    rt_device_t target = *(rt_device_t *)data;
+    rt_device_t device = rt_container_of(obj, struct rt_device, parent);
+    if (device->type == RT_Device_Class_Char)
+    {
+        lwp_tty_t tp;
+        if (rt_strncmp(obj->name, "tty"TTY_NAME_PREFIX,
+            sizeof("tty"TTY_NAME_PREFIX) - 1) == 0)
+        {
+            struct serial_tty_context *softc;
+
+            tp = rt_container_of(device, struct lwp_tty, parent);
+            softc = tty_softc(tp);
+
+            if (&softc->parent->parent == target)
+            {
+                /* matched, early return */
+                *(rt_device_t *)data = device;
+                return 1;
+            }
+        }
+    }
+
+    return RT_EOK;
+}
+
+/**
+ * @brief The default console is only a backup device with lowest priority.
+ *        It's always recommended to scratch the console from the boot arguments.
+ *        And dont forget to register the device with a higher priority.
+ */
+static int _default_console_setup(void)
+{
+    rt_err_t rc;
+    rt_device_t bakdev;
+    rt_device_t ttydev;
+
+    bakdev = rt_console_get_device();
+    if (!bakdev)
+    {
+        return -RT_ENOENT;
+    }
+
+    ttydev = bakdev;
+    rt_object_for_each(RT_Object_Class_Device, _match_tty_iter, &ttydev);
+
+    if (ttydev != bakdev)
+    {
+        LOG_I("Using /dev/%.*s as default console", RT_NAME_MAX, ttydev->parent.name);
+        lwp_console_register_backend(ttydev, LWP_CONSOLE_LOWEST_PRIOR);
+        rc = RT_EOK;
+    }
+    else
+    {
+        rc = -RT_EINVAL;
+    }
+
+    return rc;
+}
+
+INIT_COMPONENT_EXPORT(_default_console_setup);