diff --git a/configs/ph1_ld4_defconfig b/configs/ph1_ld4_defconfig
index c8404f8..e6aba42 100644
--- a/configs/ph1_ld4_defconfig
+++ b/configs/ph1_ld4_defconfig
@@ -7,4 +7,5 @@
 CONFIG_SYS_NAND_DENALI_64BIT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8
 CONFIG_DM_SERIAL=y
+CONFIG_UNIPHIER_SERIAL=y
 S:CONFIG_SPL_NAND_DENALI=y
diff --git a/configs/ph1_pro4_defconfig b/configs/ph1_pro4_defconfig
index 5c051e3..334ec4b 100644
--- a/configs/ph1_pro4_defconfig
+++ b/configs/ph1_pro4_defconfig
@@ -7,4 +7,5 @@
 CONFIG_SYS_NAND_DENALI_64BIT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8
 CONFIG_DM_SERIAL=y
+CONFIG_UNIPHIER_SERIAL=y
 S:CONFIG_SPL_NAND_DENALI=y
diff --git a/configs/ph1_sld8_defconfig b/configs/ph1_sld8_defconfig
index 2c636e6..4e8f354 100644
--- a/configs/ph1_sld8_defconfig
+++ b/configs/ph1_sld8_defconfig
@@ -7,4 +7,5 @@
 CONFIG_SYS_NAND_DENALI_64BIT=y
 CONFIG_NAND_DENALI_SPARE_AREA_SKIP_BYTES=8
 CONFIG_DM_SERIAL=y
+CONFIG_UNIPHIER_SERIAL=y
 S:CONFIG_SPL_NAND_DENALI=y
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 6a392ba..a0b6e02 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -4,3 +4,9 @@
 	help
 	  If you want to use driver model for serial drivers, say Y.
 	  To use legacy serial drivers, say N.
+
+config UNIPHIER_SERIAL
+	bool "UniPhier on-chip UART support"
+	depends on ARCH_UNIPHIER && DM_SERIAL
+	help
+	  Support for the on-chip UARTs on the Panasonic UniPhier platform.
diff --git a/include/configs/ph1_ld4.h b/include/configs/ph1_ld4.h
index a546865..005a853 100644
--- a/include/configs/ph1_ld4.h
+++ b/include/configs/ph1_ld4.h
@@ -28,9 +28,7 @@
  *   SoC UART     : enable CONFIG_UNIPHIER_SERIAL
  *   On-board UART: enable CONFIG_SYS_NS16550_SERIAL
  */
-#if 1
-#define CONFIG_UNIPHIER_SERIAL
-#else
+#if 0
 #define CONFIG_SYS_NS16550_SERIAL
 #endif
 
diff --git a/include/configs/ph1_pro4.h b/include/configs/ph1_pro4.h
index 85c14ba..7dd6fd2 100644
--- a/include/configs/ph1_pro4.h
+++ b/include/configs/ph1_pro4.h
@@ -28,9 +28,7 @@
  *   SoC UART     : enable CONFIG_UNIPHIER_SERIAL
  *   On-board UART: enable CONFIG_SYS_NS16550_SERIAL
  */
-#if 1
-#define CONFIG_UNIPHIER_SERIAL
-#else
+#if 0
 #define CONFIG_SYS_NS16550_SERIAL
 #endif
 
diff --git a/include/configs/ph1_sld8.h b/include/configs/ph1_sld8.h
index 41e2299..1062aac 100644
--- a/include/configs/ph1_sld8.h
+++ b/include/configs/ph1_sld8.h
@@ -28,9 +28,7 @@
  *   SoC UART     : enable CONFIG_UNIPHIER_SERIAL
  *   On-board UART: enable CONFIG_SYS_NS16550_SERIAL
  */
-#if 1
-#define CONFIG_UNIPHIER_SERIAL
-#else
+#if 0
 #define CONFIG_SYS_NS16550_SERIAL
 #endif