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 a27a3ad..09694b4 100644
--- a/arch/arm/dts/rk3308-rock-pi-s-u-boot.dtsi
+++ b/arch/arm/dts/rk3308-rock-pi-s-u-boot.dtsi
@@ -6,7 +6,7 @@
 
 / {
 	chosen {
-		u-boot,spl-boot-order = "same-as-spl", &emmc;
+		u-boot,spl-boot-order = "same-as-spl", &emmc, &sdmmc;
 	};
 };
 
diff --git a/arch/arm/dts/rk3308-u-boot.dtsi b/arch/arm/dts/rk3308-u-boot.dtsi
index c8451b2..db2c20a 100644
--- a/arch/arm/dts/rk3308-u-boot.dtsi
+++ b/arch/arm/dts/rk3308-u-boot.dtsi
@@ -26,6 +26,11 @@
 	bootph-all;
 };
 
+&sdmmc {
+	bootph-all;
+	u-boot,spl-fifo-mode;
+};
+
 &grf {
 	bootph-all;
 };