diff --git a/arch/arm/dts/fsl-ls1088a-u-boot.dtsi b/arch/arm/dts/fsl-ls1088a-u-boot.dtsi
new file mode 100644
index 0000000..f59d8b1
--- /dev/null
+++ b/arch/arm/dts/fsl-ls1088a-u-boot.dtsi
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <config.h>
+
+&duart0 {
+	bootph-all;
+};
+
+&duart1 {
+	bootph-all;
+};