diff --git a/include/configs/ls1021aqds.h b/include/configs/ls1021aqds.h
index 6a27111..773cc9b 100644
--- a/include/configs/ls1021aqds.h
+++ b/include/configs/ls1021aqds.h
@@ -268,9 +268,7 @@
 /*
  * Serial Port
  */
-#ifdef CONFIG_LPUART
-#define CONFIG_LPUART_32B_REG
-#else
+#ifndef CONFIG_LPUART
 #define CONFIG_SYS_NS16550_SERIAL
 #ifndef CONFIG_DM_SERIAL
 #define CONFIG_SYS_NS16550_REG_SIZE	1
diff --git a/include/configs/ls1021atwr.h b/include/configs/ls1021atwr.h
index 03a4ce5..b607dd3 100644
--- a/include/configs/ls1021atwr.h
+++ b/include/configs/ls1021atwr.h
@@ -165,9 +165,7 @@
 /*
  * Serial Port
  */
-#ifdef CONFIG_LPUART
-#define CONFIG_LPUART_32B_REG
-#else
+#ifndef CONFIG_LPUART
 #define CONFIG_SYS_NS16550_SERIAL
 #ifndef CONFIG_DM_SERIAL
 #define CONFIG_SYS_NS16550_REG_SIZE	1
diff --git a/include/configs/ls1028aqds.h b/include/configs/ls1028aqds.h
index 1b4d181..843cd59 100644
--- a/include/configs/ls1028aqds.h
+++ b/include/configs/ls1028aqds.h
@@ -66,7 +66,6 @@
 
 /* LPUART */
 #ifdef CONFIG_LPUART
-#define CONFIG_LPUART_32B_REG
 #define CFG_LPUART_MUX_MASK	0xf0
 #define CFG_LPUART_EN		0xf0
 #endif
diff --git a/include/configs/ls1043aqds.h b/include/configs/ls1043aqds.h
index e9919cd..bc02ac5 100644
--- a/include/configs/ls1043aqds.h
+++ b/include/configs/ls1043aqds.h
@@ -39,11 +39,6 @@
 #define QSGMII_CARD_PORT4_PHY_ADDR_S2 0xB
 #endif
 
-/* LPUART */
-#ifdef CONFIG_LPUART
-#define CONFIG_LPUART_32B_REG
-#endif
-
 /* SATA */
 
 /* EEPROM */
diff --git a/include/configs/ls1046aqds.h b/include/configs/ls1046aqds.h
index 2972e3b..ce68d3f 100644
--- a/include/configs/ls1046aqds.h
+++ b/include/configs/ls1046aqds.h
@@ -54,7 +54,6 @@
 
 /* LPUART */
 #ifdef CONFIG_LPUART
-#define CONFIG_LPUART_32B_REG
 #define CFG_UART_MUX_MASK	0x6
 #define CFG_UART_MUX_SHIFT	1
 #define CFG_LPUART_EN		0x2