diff --git a/arch/arm64/boot/dts/rockchip/px30.dtsi b/arch/arm64/boot/dts/rockchip/px30.dtsi
index f809dd6d5dc3..245379d5bfd6 100644
--- a/arch/arm64/boot/dts/rockchip/px30.dtsi
+++ b/arch/arm64/boot/dts/rockchip/px30.dtsi
@@ -931,6 +931,7 @@ sdmmc: mmc@ff370000 {
 		clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>,
 			 <&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
 		clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
+		bus-width = <4>;
 		fifo-depth = <0x100>;
 		max-frequency = <150000000>;
 		pinctrl-names = "default";
@@ -946,6 +947,7 @@ sdio: mmc@ff380000 {
 		clocks = <&cru HCLK_SDIO>, <&cru SCLK_SDIO>,
 			 <&cru SCLK_SDIO_DRV>, <&cru SCLK_SDIO_SAMPLE>;
 		clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
+		bus-width = <4>;
 		fifo-depth = <0x100>;
 		max-frequency = <150000000>;
 		pinctrl-names = "default";
@@ -961,6 +963,7 @@ emmc: mmc@ff390000 {
 		clocks = <&cru HCLK_EMMC>, <&cru SCLK_EMMC>,
 			 <&cru SCLK_EMMC_DRV>, <&cru SCLK_EMMC_SAMPLE>;
 		clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
+		bus-width = <8>;
 		fifo-depth = <0x100>;
 		max-frequency = <150000000>;
 		pinctrl-names = "default";