diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 615291ea9b5e9..77efa7ee6eda2 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -2923,6 +2923,7 @@ static int lpuart_probe(struct platform_device *pdev)
 	pm_runtime_set_autosuspend_delay(&pdev->dev, UART_AUTOSUSPEND_TIMEOUT);
 	pm_runtime_set_active(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);
+	pm_runtime_mark_last_busy(&pdev->dev);
 
 	ret = lpuart_global_reset(sport);
 	if (ret)