serial: add static directive to local functions

The functions _serial_putc, _serial_putc_raw, _serial_puts,
_serial_getc, _serial_tstc, _serial_setbrg are defined and used
locally in each of serial_ns16550.c and serial_s3c24x0.c.

Add static directive to them and remove declarations from
include/common.h.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>

drivers/serial/serial_ns16550.c

@@ -119,8 +119,7 @@ static NS16550_t serial_ports[6] = {
 	.puts	= eserial##port##_puts,		\
 }
 
-void
-_serial_putc(const char c,const int port)
+static void _serial_putc(const char c, const int port)
 {
 	if (c == '\n')
 		NS16550_putc(PORT, '\r');
@@ -128,35 +127,29 @@ _serial_putc(const char c,const int port)
 	NS16550_putc(PORT, c);
 }
 
-void
-_serial_putc_raw(const char c,const int port)
+static void _serial_putc_raw(const char c, const int port)
 {
 	NS16550_putc(PORT, c);
 }
 
-void
-_serial_puts (const char *s,const int port)
+static void _serial_puts(const char *s, const int port)
 {
 	while (*s) {
-		_serial_putc (*s++,port);
+		_serial_putc(*s++, port);
 	}
 }
 
-
-int
-_serial_getc(const int port)
+static int _serial_getc(const int port)
 {
 	return NS16550_getc(PORT);
 }
 
-int
-_serial_tstc(const int port)
+static int _serial_tstc(const int port)
 {
 	return NS16550_tstc(PORT);
 }
 
-void
-_serial_setbrg (const int port)
+static void _serial_setbrg(const int port)
 {
 	int clock_divisor;
 

drivers/serial/serial_s3c24x0.c

@@ -69,7 +69,7 @@ DECLARE_GLOBAL_DATA_PTR;
 static int hwflow;
 #endif
 
-void _serial_setbrg(const int dev_index)
+static void _serial_setbrg(const int dev_index)
 {
 	struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
 	unsigned int reg = 0;
@@ -131,7 +131,7 @@ static int serial_init_dev(const int dev_index)
  * otherwise. When the function is succesfull, the character read is
  * written into its argument c.
  */
-int _serial_getc(const int dev_index)
+static int _serial_getc(const int dev_index)
 {
 	struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
 
@@ -181,7 +181,7 @@ void enable_putc(void)
 /*
  * Output a single byte to the serial port.
  */
-void _serial_putc(const char c, const int dev_index)
+static void _serial_putc(const char c, const int dev_index)
 {
 	struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
 #ifdef CONFIG_MODEM_SUPPORT
@@ -212,7 +212,7 @@ static inline void serial_putc_dev(unsigned int dev_index, const char c)
 /*
  * Test whether a character is in the RX buffer
  */
-int _serial_tstc(const int dev_index)
+static int _serial_tstc(const int dev_index)
 {
 	struct s3c24x0_uart *uart = s3c24x0_get_base_uart(dev_index);
 
@@ -224,7 +224,7 @@ static inline int serial_tstc_dev(unsigned int dev_index)
 	return _serial_tstc(dev_index);
 }
 
-void _serial_puts(const char *s, const int dev_index)
+static void _serial_puts(const char *s, const int dev_index)
 {
 	while (*s) {
 		_serial_putc(*s++, dev_index);

include/common.h

@@ -636,13 +636,6 @@ struct stdio_dev;
 int serial_stub_getc(struct stdio_dev *sdev);
 int serial_stub_tstc(struct stdio_dev *sdev);
 
-void	_serial_setbrg (const int);
-void	_serial_putc   (const char, const int);
-void	_serial_putc_raw(const char, const int);
-void	_serial_puts   (const char *, const int);
-int	_serial_getc   (const int);
-int	_serial_tstc   (const int);
-
 /* $(CPU)/speed.c */
 int	get_clocks (void);
 int	get_clocks_866 (void);