diff --git a/include/configs/davinci_dvevm.h b/include/configs/davinci_dvevm.h
index b43beaa03e..fae430ba6f 100644
--- a/include/configs/davinci_dvevm.h
+++ b/include/configs/davinci_dvevm.h
@@ -85,7 +85,7 @@
 /*====================*/
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
-#define CONFIG_SYS_NS16550_REG_SIZE	4		/* NS16550 register size */
+#define CONFIG_SYS_NS16550_REG_SIZE	-4	/* NS16550 register size, byteorder */
 #define CONFIG_SYS_NS16550_COM1	0x01c20000	/* Base address of UART0 */
 #define CONFIG_SYS_NS16550_CLK		27000000	/* Input clock to NS16550 */
 #define CONFIG_CONS_INDEX	1		/* use UART0 for console */
diff --git a/include/configs/davinci_schmoogie.h b/include/configs/davinci_schmoogie.h
index 2c97a00167..923e4777be 100644
--- a/include/configs/davinci_schmoogie.h
+++ b/include/configs/davinci_schmoogie.h
@@ -52,7 +52,7 @@
 /*====================*/
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
-#define CONFIG_SYS_NS16550_REG_SIZE	4		/* NS16550 register size */
+#define CONFIG_SYS_NS16550_REG_SIZE	-4	/* NS16550 register size, byteorder */
 #define CONFIG_SYS_NS16550_COM1	0x01c20000	/* Base address of UART0 */
 #define CONFIG_SYS_NS16550_CLK		27000000	/* Input clock to NS16550 */
 #define CONFIG_CONS_INDEX	1		/* use UART0 for console */
diff --git a/include/configs/davinci_sffsdr.h b/include/configs/davinci_sffsdr.h
index 9354c2ffb0..73a59db871 100644
--- a/include/configs/davinci_sffsdr.h
+++ b/include/configs/davinci_sffsdr.h
@@ -54,7 +54,7 @@
 /* Serial Driver info */
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
-#define CONFIG_SYS_NS16550_REG_SIZE	4		/* NS16550 register size */
+#define CONFIG_SYS_NS16550_REG_SIZE	-4	/* NS16550 register size, byteorder */
 #define CONFIG_SYS_NS16550_COM1	0x01c20000	/* Base address of UART0 */
 #define CONFIG_SYS_NS16550_CLK		27000000	/* Input clock to NS16550 */
 #define CONFIG_CONS_INDEX	1		/* use UART0 for console */
diff --git a/include/configs/davinci_sonata.h b/include/configs/davinci_sonata.h
index 0865d0d33b..70d2c7d0c5 100644
--- a/include/configs/davinci_sonata.h
+++ b/include/configs/davinci_sonata.h
@@ -85,7 +85,7 @@
 /*====================*/
 #define CONFIG_SYS_NS16550
 #define CONFIG_SYS_NS16550_SERIAL
-#define CONFIG_SYS_NS16550_REG_SIZE	4		/* NS16550 register size */
+#define CONFIG_SYS_NS16550_REG_SIZE	-4	/* NS16550 register size, byteorder */
 #define CONFIG_SYS_NS16550_COM1	0x01c20000	/* Base address of UART0 */
 #define CONFIG_SYS_NS16550_CLK		27000000	/* Input clock to NS16550 */
 #define CONFIG_CONS_INDEX	1		/* use UART0 for console */