diff --git a/include/configs/seaboard.h b/include/configs/seaboard.h
index 74d3b94..60ddeac 100644
--- a/include/configs/seaboard.h
+++ b/include/configs/seaboard.h
@@ -99,11 +99,6 @@
 #define CONFIG_TEGRA_KEYBOARD
 #define CONFIG_KEYBOARD
 
-#undef TEGRA_DEVICE_SETTINGS
-#define TEGRA_DEVICE_SETTINGS	"stdin=serial,tegra-kbc\0" \
-				"stdout=serial\0" \
-				"stderr=serial\0"
-
 #include "tegra-common-post.h"
 
 /* NAND support */
diff --git a/include/configs/tegra-common-post.h b/include/configs/tegra-common-post.h
index 6835155..6f310be 100644
--- a/include/configs/tegra-common-post.h
+++ b/include/configs/tegra-common-post.h
@@ -165,6 +165,25 @@
 	"fdt_addr_r=0x02000000\0" \
 	"ramdisk_addr_r=0x02100000\0" \
 
+#ifdef CONFIG_TEGRA_KEYBOARD
+#define STDIN_KBD_KBC ",tegra-kbc"
+#else
+#define STDIN_KBD_KBC ""
+#endif
+
+#ifdef CONFIG_USB_KEYBOARD
+#define STDIN_KBD_USB ",usbkbd"
+#define CONFIG_SYS_USB_EVENT_POLL
+#define CONFIG_PREBOOT			"usb start"
+#else
+#define STDIN_KBD_USB ""
+#endif
+
+#define TEGRA_DEVICE_SETTINGS \
+	"stdin=serial" STDIN_KBD_KBC STDIN_KBD_USB "\0" \
+	"stdout=serial\0" \
+	"stderr=serial\0" \
+
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	TEGRA_DEVICE_SETTINGS \
 	MEM_LAYOUT_ENV_SETTINGS \
diff --git a/include/configs/tegra20-common.h b/include/configs/tegra20-common.h
index 2a14caa..31b68be 100644
--- a/include/configs/tegra20-common.h
+++ b/include/configs/tegra20-common.h
@@ -124,12 +124,8 @@
 
 #define CONFIG_SYS_NO_FLASH
 
-/* Environment information, boards can override if required */
 #define CONFIG_CONSOLE_MUX
 #define CONFIG_SYS_CONSOLE_IS_IN_ENV
-#define TEGRA_DEVICE_SETTINGS	"stdin=serial\0" \
-				"stdout=serial\0" \
-				"stderr=serial\0"
 
 #define CONFIG_LOADADDR		0x408000	/* def. location for kernel */
 #define CONFIG_BOOTDELAY	2		/* -1 to disable auto boot */