diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
index 8be252991..b65ccf1b5 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
@@ -606,16 +606,16 @@ sdhci1: mmc@fa00000 {
 		bus-width = <4>;
 		ti,clkbuf-sel = <0x7>;
 		ti,otap-del-sel-legacy = <0x8>;
-		ti,otap-del-sel-sd-hs = <0x0>;
-		ti,otap-del-sel-sdr12 = <0x0>;
-		ti,otap-del-sel-sdr25 = <0x0>;
-		ti,otap-del-sel-sdr50 = <0x8>;
-		ti,otap-del-sel-sdr104 = <0x7>;
-		ti,otap-del-sel-ddr50 = <0x4>;
+		//ti,otap-del-sel-sd-hs = <0x0>;
+		//ti,otap-del-sel-sdr12 = <0x0>;
+		//ti,otap-del-sel-sdr25 = <0x0>;
+		//ti,otap-del-sel-sdr50 = <0x8>;
+		//ti,otap-del-sel-sdr104 = <0x7>;
+		//ti,otap-del-sel-ddr50 = <0x4>;
 		ti,itap-del-sel-legacy = <0xa>;
-		ti,itap-del-sel-sd-hs = <0x1>;
-		ti,itap-del-sel-sdr12 = <0xa>;
-		ti,itap-del-sel-sdr25 = <0x1>;
+		//ti,itap-del-sel-sd-hs = <0x1>;
+		//ti,itap-del-sel-sdr12 = <0xa>;
+		//ti,itap-del-sel-sdr25 = <0x1>;
 		status = "disabled";
 	};
 
diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
old mode 100644
new mode 100755
index 3047586a6..7a816c779
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -76,17 +76,21 @@ wkup_r5fss0_core0_memory_region: r5f-dma-memory@9c900000 {
 			reg = <0x00 0x9c900000 0x00 0x01e00000>;
 			no-map;
 		};
+		/* disable mcu
 		mcu_r5fss0_core0_dma_memory_region: r5f-dma-memory@9b800000 {
 			compatible = "shared-dma-pool";
 			reg = <0x00 0x9b800000 0x00 0x100000>;
 			no-map;
 		};
+		*/
 
+		/* disable mcu
 		mcu_r5fss0_core0_memory_region: r5f-dma-memory@9b900000 {
 			compatible = "shared-dma-pool";
 			reg = <0x00 0x9b900000 0x00 0x0f00000>;
 			no-map;
 		};
+		*/
 
 		c7x_0_dma_memory_region: c7x-dma-memory@99800000 {
 			compatible = "shared-dma-pool";
@@ -689,7 +693,7 @@ &sdhci1 {
 	/* SD/MMC */
 	status = "okay";
 	vmmc-supply = <&vdd_mmc1>;
-	vqmmc-supply = <&vddshv_sdio>;
+	//vqmmc-supply = <&vddshv_sdio>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_mmc1_pins_default>;
 	disable-wp;
@@ -840,6 +844,7 @@ mbox_c7x_0: mbox-c7x-0 {
 	};
 };
 
+/* disable mcu
 &mailbox0_cluster2 {
 	ti,mbox-num-fifos = <2>;
 	mbox_mcu_r5_0: mbox-mcu-r5-0 {
@@ -847,6 +852,7 @@ mbox_mcu_r5_0: mbox-mcu-r5-0 {
 		ti,mbox-tx = <1 0 0>;
 	};
 };
+*/
 
 &c7x_0 {
 	mboxes = <&mailbox0_cluster1>, <&mbox_c7x_0>;
@@ -860,11 +866,18 @@ &wkup_r5fss0_core0 {
 		<&wkup_r5fss0_core0_memory_region>;
 };
 
+/* disable mcu
 &mcu_r5fss0_core0 {
 	mboxes = <&mailbox0_cluster2>, <&mbox_mcu_r5_0>;
 	memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
 			<&mcu_r5fss0_core0_memory_region>;
 };
+*/
+
+/* disable MCU R5F subsystem */
+&mcu_r5fss0 {
+       status = "disabled";
+};
 
 #define K3_TS_OFFSET(pa, val)	(0x4+(pa)*4) (0x10000 | val)