m68k: add DM model serial driver

Boards can now use DM serial driver, or still legacy mcf uart
driver version.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/include/dm/platform_data/serial_coldfire.h b/include/dm/platform_data/serial_coldfire.h
new file mode 100644
index 0000000..5d86456
--- /dev/null
+++ b/include/dm/platform_data/serial_coldfire.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2015  Angelo Dureghello <angelo@sysam.it>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __serial_coldfire_h
+#define __serial_coldfire_h
+
+/*
+ * struct coldfire_serial_platdata - information about a coldfire port
+ *
+ * @base:               Uart port base register address
+ * @port:               Uart port index, for cpu with pinmux for uart / gpio
+ * baudrtatre:          Uart port baudrate
+ */
+struct coldfire_serial_platdata {
+	unsigned long base;
+	int port;
+	int baudrate;
+};
+
+#endif /* __serial_coldfire_h */