Index: sys/boot/fdt/dts/arm/db78460.dts
===================================================================
--- sys/boot/fdt/dts/arm/db78460.dts
+++ sys/boot/fdt/dts/arm/db78460.dts
@@ -111,45 +111,41 @@
 		};
 
 		serial0: serial@12000 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x12000 0x20>;
 			reg-shift = <2>;
 			current-speed = <115200>;
 			clock-frequency = <0>;
-			busy-detect = <1>;
 			interrupts = <41>;
 			interrupt-parent = <&MPIC>;
 		};
 
 		serial1: serial@12100 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x12100 0x20>;
 			reg-shift = <2>;
 			current-speed = <115200>;
 			clock-frequency = <0>;
-			busy-detect = <1>;
 			interrupts = <42>;
 			interrupt-parent = <&MPIC>;
 		};
 
 		serial2: serial@12200 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x12200 0x20>;
 			reg-shift = <2>;
 			current-speed = <115200>;
 			clock-frequency = <0>;
-			busy-detect = <1>;
 			interrupts = <43>;
 			interrupt-parent = <&MPIC>;
 		};
 		
 		serial3: serial@12300 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x12300 0x20>;
 			reg-shift = <2>;
 			current-speed = <115200>;
 			clock-frequency = <0>;
-			busy-detect = <1>;
 			interrupts = <44>;
 			interrupt-parent = <&MPIC>;
 		};
Index: sys/boot/fdt/dts/arm/rk3188.dtsi
===================================================================
--- sys/boot/fdt/dts/arm/rk3188.dtsi
+++ sys/boot/fdt/dts/arm/rk3188.dtsi
@@ -179,53 +179,49 @@
 		};
 
 		uart0: serial@10124000 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x10124000 0x400>;
 			reg-shift = <2>;
 			interrupts = <66>;
 			interrupt-parent = <&GIC>;
 			current-speed = <115200>;
 			clock-frequency = < 24000000 >;
-			busy-detect = <1>;
 			broken-txfifo = <1>;
 			status = "disabled";
 		};
 
 		uart1: serial@10126000 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x10126000 0x400>;
 			reg-shift = <2>;
 			interrupts = <67>;
 			interrupt-parent = <&GIC>;
 			current-speed = <115200>;
 			clock-frequency = < 24000000 >;
-			busy-detect = <1>;
 			broken-txfifo = <1>;
 			status = "disabled";
 		};
 
 		uart2: serial@20064000 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x20064000 0x400>;
 			reg-shift = <2>;
 			interrupts = <68>;
 			interrupt-parent = <&GIC>;
 			current-speed = <115200>;
 			clock-frequency = < 24000000 >;
-			busy-detect = <1>;
 			broken-txfifo = <1>;
 			status = "disabled";
 		};
 
 		uart3: serial@20068000 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x20068000 0x400>;
 			reg-shift = <2>;
 			interrupts = <69>;
 			interrupt-parent = <&GIC>;
 			current-speed = <115200>;
 			clock-frequency = < 24000000 >;
-			busy-detect = <1>;
 			broken-txfifo = <1>;
 			status = "disabled";
 		};
Index: sys/boot/fdt/dts/arm/sun4i-a10.dtsi
===================================================================
--- sys/boot/fdt/dts/arm/sun4i-a10.dtsi
+++ sys/boot/fdt/dts/arm/sun4i-a10.dtsi
@@ -120,14 +120,13 @@
 		};
 
 		UART0: serial@01c28000 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x01c28000 0x400>;
 			reg-shift = <2>;
 			interrupts = <1>;
 			interrupt-parent = <&AINTC>;
 			current-speed = <115200>;
 			clock-frequency = < 24000000 >;
-			busy-detect = <1>;
 		};
 
 		emac@01c0b000 {
Index: sys/boot/fdt/dts/arm/sun7i-a20.dtsi
===================================================================
--- sys/boot/fdt/dts/arm/sun7i-a20.dtsi
+++ sys/boot/fdt/dts/arm/sun7i-a20.dtsi
@@ -126,14 +126,13 @@
 		};
 
 		UART0: serial@01c28000 {
-			compatible = "ns16550";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x01c28000 0x400>;
 			reg-shift = <2>;
 			interrupts = <1>;
 			interrupt-parent = <&GIC>;
 			current-speed = <115200>;
 			clock-frequency = < 24000000 >;
-			busy-detect = <1>;
 		};
 
 		emac@01c0b000 {
Index: sys/dev/uart/uart_dev_ns8250.c
===================================================================
--- sys/dev/uart/uart_dev_ns8250.c
+++ sys/dev/uart/uart_dev_ns8250.c
@@ -427,9 +427,8 @@
 	 * Check whether uart requires to read USR reg when IIR_BUSY and 
 	 * has broken txfifo. 
 	 */
+	ns8250->busy_detect = ofw_bus_is_compatible(sc->sc_dev, "snps,dw-apb-uart");
 	node = ofw_bus_get_node(sc->sc_dev);
-	if ((OF_getencprop(node, "busy-detect", &cell, sizeof(cell))) > 0)
-		ns8250->busy_detect = cell ? 1 : 0;
 	if ((OF_getencprop(node, "broken-txfifo", &cell, sizeof(cell))) > 0)
 		broken_txfifo =  cell ? 1 : 0;
 #endif