serial: ns16550: Move serial registration from serial_initialize()

Move the registration of eserialN_device ports from default
serial_initialize() into driver specific function called from
serial_initialize(). This slims down the serial_initialize() call
to a bare tracker of all possible serial port registration routines
in U-Boot.

The newly implemented ns16550_serial_initialize() function, which is
implemented inside of the ns16550 serial driver allows encapsulation
of eserialN_device within the ns16550 serial driver itself.

Also, remove the exports of eserialN_device from include/serial.h
as they are no longer needed. This is simply because the implementation of
default_serial_console() is wrapped into the ns16550 serial driver and
the default console is picked by CONFIG_SERIAL<N> macro in config file.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Michal Simek <monstr@monstr.eu>

1 files changed, 2 insertions, 6 deletions

diff --git a/include/serial.h b/include/serial.h
index 71822c6..b44fac2 100644
--- a/include/serial.h
+++ b/include/serial.h
@@ -34,14 +34,10 @@ extern struct serial_device *default_serial_console(void);
 	defined(CONFIG_MICROBLAZE)
 extern struct serial_device serial0_device;
 extern struct serial_device serial1_device;
-#if defined(CONFIG_SYS_NS16550_SERIAL)
+#endif
+
 extern struct serial_device eserial1_device;
 extern struct serial_device eserial2_device;
-extern struct serial_device eserial3_device;
-extern struct serial_device eserial4_device;
-#endif /* CONFIG_SYS_NS16550_SERIAL */
-
-#endif
 
 #if defined(CONFIG_OMAP3_ZOOM2)
 extern struct serial_device zoom2_serial_device0;