diff --git a/arch/arm/dts/rk3308-evb-u-boot.dtsi b/arch/arm/dts/rk3308-evb-u-boot.dtsi
index 007a69f9a60..ce826667dcc 100644
--- a/arch/arm/dts/rk3308-evb-u-boot.dtsi
+++ b/arch/arm/dts/rk3308-evb-u-boot.dtsi
@@ -10,5 +10,6 @@
 };
 
 &uart4_xfer {
-	bootph-all;
+	bootph-pre-sram;
+	bootph-pre-ram;
 };
diff --git a/arch/arm/dts/rk3308-roc-cc-u-boot.dtsi b/arch/arm/dts/rk3308-roc-cc-u-boot.dtsi
index 3e01e7af611..72b6f223838 100644
--- a/arch/arm/dts/rk3308-roc-cc-u-boot.dtsi
+++ b/arch/arm/dts/rk3308-roc-cc-u-boot.dtsi
@@ -29,7 +29,8 @@
 };
 
 &uart2m0_xfer {
-	bootph-all;
+	bootph-pre-sram;
+	bootph-pre-ram;
 };
 
 &vcc_sd {
diff --git a/arch/arm/dts/rk3308-rock-pi-s-u-boot.dtsi b/arch/arm/dts/rk3308-rock-pi-s-u-boot.dtsi
index ff5bab316a3..3059a024608 100644
--- a/arch/arm/dts/rk3308-rock-pi-s-u-boot.dtsi
+++ b/arch/arm/dts/rk3308-rock-pi-s-u-boot.dtsi
@@ -14,7 +14,8 @@
 };
 
 &uart0_xfer {
-	bootph-all;
+	bootph-pre-sram;
+	bootph-pre-ram;
 };
 
 &vcc5v0_otg {
diff --git a/arch/arm/dts/rk3308-rock-s0-u-boot.dtsi b/arch/arm/dts/rk3308-rock-s0-u-boot.dtsi
index 84ca2ee0d5f..dd4cb8660b8 100644
--- a/arch/arm/dts/rk3308-rock-s0-u-boot.dtsi
+++ b/arch/arm/dts/rk3308-rock-s0-u-boot.dtsi
@@ -13,7 +13,8 @@
 };
 
 &uart0_xfer {
-	bootph-all;
+	bootph-pre-sram;
+	bootph-pre-ram;
 };
 
 &vdd_core {