serial: push default_serial_console to drivers

Rather than sticking arch/board/driver specific logic in the common
serial code, push it all out to the respective drivers.  The serial
drivers declare these funcs weak so that boards can still override
things with their own definition.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
CC: Heiko Schocher <hs@denx.de>
CC: Anatolij Gustschin <agust@denx.de>
CC: Tom Rix <Tom.Rix@windriver.com>
CC: Minkyu Kang <mk7.kang@samsung.com>
CC: Craig Nauman <cnauman@diagraph.com>
CC: Prafulla Wadaskar <prafulla@marvell.com>
CC: Mahavir Jain <mjain@marvell.com>
Tested-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/drivers/serial/serial.c b/drivers/serial/serial.c
index 4032dfd..4afdd41 100644
--- a/drivers/serial/serial.c
+++ b/drivers/serial/serial.c
@@ -22,6 +22,7 @@
  */
 
 #include <common.h>
+#include <linux/compiler.h>
 
 #include <ns16550.h>
 #ifdef CONFIG_NS87308
@@ -335,4 +336,20 @@
 DECLARE_ESERIAL_FUNCTIONS(4);
 struct serial_device eserial4_device =
 	INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4");
+
+__weak struct serial_device *default_serial_console(void)
+{
+#if CONFIG_CONS_INDEX == 1
+	return &eserial1_device;
+#elif CONFIG_CONS_INDEX == 2
+	return &eserial2_device;
+#elif CONFIG_CONS_INDEX == 3
+	return &eserial3_device;
+#elif CONFIG_CONS_INDEX == 4
+	return &eserial4_device;
+#else
+#error "Bad CONFIG_CONS_INDEX."
+#endif
+}
+
 #endif /* CONFIG_SERIAL_MULTI */
diff --git a/drivers/serial/serial_s3c24x0.c b/drivers/serial/serial_s3c24x0.c
index abdbff1..ff35ce5 100644
--- a/drivers/serial/serial_s3c24x0.c
+++ b/drivers/serial/serial_s3c24x0.c
@@ -19,6 +19,7 @@
  */
 
 #include <common.h>
+#include <linux/compiler.h>
 #include <asm/arch/s3c24x0_cpu.h>
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -310,4 +311,17 @@
 DECLARE_S3C_SERIAL_FUNCTIONS(2);
 struct serial_device s3c24xx_serial2_device =
 INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3");
+
+__weak struct serial_device *default_serial_console(void)
+{
+#if defined(CONFIG_SERIAL1)
+	return &s3c24xx_serial0_device;
+#elif defined(CONFIG_SERIAL2)
+	return &s3c24xx_serial1_device;
+#elif defined(CONFIG_SERIAL3)
+	return &s3c24xx_serial2_device;
+#else
+#error "CONFIG_SERIAL? missing."
+#endif
+}
 #endif /* CONFIG_SERIAL_MULTI */
diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c
index f1ffa29..6604aa9 100644
--- a/drivers/serial/serial_s5p.c
+++ b/drivers/serial/serial_s5p.c
@@ -22,6 +22,7 @@
  */
 
 #include <common.h>
+#include <linux/compiler.h>
 #include <asm/io.h>
 #include <asm/arch/uart.h>
 #include <asm/arch/clk.h>
@@ -205,3 +206,18 @@
 DECLARE_S5P_SERIAL_FUNCTIONS(3);
 struct serial_device s5p_serial3_device =
 	INIT_S5P_SERIAL_STRUCTURE(3, "s5pser3", "S5PUART3");
+
+__weak struct serial_device *default_serial_console(void)
+{
+#if defined(CONFIG_SERIAL0)
+	return &s5p_serial0_device;
+#elif defined(CONFIG_SERIAL1)
+	return &s5p_serial1_device;
+#elif defined(CONFIG_SERIAL2)
+	return &s5p_serial2_device;
+#elif defined(CONFIG_SERIAL3)
+	return &s5p_serial3_device;
+#else
+#error "CONFIG_SERIAL? missing."
+#endif
+}