diff --git a/arch/arm/mach-s3c2410/Kconfig b/arch/arm/mach-s3c2410/Kconfig
index d4b013b..e2079cf 100644
--- a/arch/arm/mach-s3c2410/Kconfig
+++ b/arch/arm/mach-s3c2410/Kconfig
@@ -9,6 +9,7 @@
 	depends on ARCH_S3C2410
 	select S3C2410_CLOCK
 	select S3C2410_GPIO
+	select CPU_LLSERIAL_S3C2410
 	select S3C2410_PM if PM
 	help
 	  Support for S3C2410 and S3C2410A family from the S3C24XX line
diff --git a/arch/arm/mach-s3c2412/Kconfig b/arch/arm/mach-s3c2412/Kconfig
index d5be5d0..8e8fe48 100644
--- a/arch/arm/mach-s3c2412/Kconfig
+++ b/arch/arm/mach-s3c2412/Kconfig
@@ -7,6 +7,7 @@
 config CPU_S3C2412
 	bool
 	depends on ARCH_S3C2410
+	select CPU_LLSERIAL_S3C2440
 	select S3C2412_PM if PM
 	select S3C2412_DMA if S3C2410_DMA
 	help
diff --git a/arch/arm/mach-s3c2440/Kconfig b/arch/arm/mach-s3c2440/Kconfig
index e3bfda0..f1915bd 100644
--- a/arch/arm/mach-s3c2440/Kconfig
+++ b/arch/arm/mach-s3c2440/Kconfig
@@ -12,6 +12,7 @@
 	select S3C2410_GPIO
 	select S3C2440_DMA if S3C2410_DMA
 	select CPU_S3C244X
+	select CPU_LLSERIAL_S3C2440
 	help
 	  Support for S3C2440 Samsung Mobile CPU based systems.
 
diff --git a/arch/arm/mach-s3c2442/Kconfig b/arch/arm/mach-s3c2442/Kconfig
index bf8d87a..88d5fd3 100644
--- a/arch/arm/mach-s3c2442/Kconfig
+++ b/arch/arm/mach-s3c2442/Kconfig
@@ -11,6 +11,7 @@
 	select S3C2410_GPIO
 	select S3C2410_PM if PM
 	select CPU_S3C244X
+	select CPU_LLSERIAL_S3C2440
 	help
 	  Support for S3C2442 Samsung Mobile CPU based systems.
 
diff --git a/arch/arm/mach-s3c2443/Kconfig b/arch/arm/mach-s3c2443/Kconfig
index c649bb2..14252f5 100644
--- a/arch/arm/mach-s3c2443/Kconfig
+++ b/arch/arm/mach-s3c2443/Kconfig
@@ -8,6 +8,7 @@
 	bool
 	depends on ARCH_S3C2410
 	select S3C2443_DMA if S3C2410_DMA
+	select CPU_LLSERIAL_S3C2440
 	help
 	  Support for the S3C2443 SoC from the S3C24XX line
 
diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index 21435c2..6c206ab 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -12,6 +12,34 @@
 	help
 	  Base platform code for any Samsung S3C device
 
+# low-level serial option nodes
+
+config CPU_LLSERIAL_S3C2410_ONLY
+	bool
+	depends on ARCH_S3C2410
+	default y if CPU_LLSERIAL_S3C2410 && !CPU_LLSERIAL_S3C2440
+
+config CPU_LLSERIAL_S3C2440_ONLY
+	bool
+	depends on ARCH_S3C2410
+	default y if CPU_LLSERIAL_S3C2440 && !CPU_LLSERIAL_S3C2410
+
+config CPU_LLSERIAL_S3C2410
+	bool
+	depends on ARCH_S3C2410
+	help
+	  Selected if there is an S3C2410 (or register compatible) serial
+	  low-level implementation needed
+
+config CPU_LLSERIAL_S3C2440
+	bool
+	depends on ARCH_S3C2410
+	help
+	  Selected if there is an S3C2440 (or register compatible) serial
+	  low-level implementation needed
+
+# boot configurations
+
 comment "Boot options"
 
 config S3C2410_BOOT_WATCHDOG