serial: arm: Implement CONFIG_SERIAL_MULTI into sa1100 serial driver

Implement support for CONFIG_SERIAL_MULTI into sa1100 serial driver.
This driver was so far only usable directly, but this patch also adds
support for the multi method. This allows using more than one serial
driver alongside the sa1100 driver. Also, add a weak implementation
of default_serial_console() returning this driver.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>

common/serial.c

@@ -91,6 +91,7 @@ serial_initfunc(mxc_serial_initialize);
 serial_initfunc(netarm_serial_initialize);
 serial_initfunc(pl01x_serial_initialize);
 serial_initfunc(s3c44b0_serial_initialize);
+serial_initfunc(sa1100_serial_initialize);
 
 void serial_register(struct serial_device *dev)
 {
@@ -160,6 +161,7 @@ void serial_initialize(void)
 	netarm_serial_initialize();
 	pl01x_serial_initialize();
 	s3c44b0_serial_initialize();
+	sa1100_serial_initialize();
 
 	serial_assign(default_serial_console()->name);
 }

drivers/serial/serial_sa1100.c

@@ -30,10 +30,12 @@
 
 #include <common.h>
 #include <SA-1100.h>
+#include <serial.h>
+#include <linux/compiler.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-void serial_setbrg (void)
+static void sa1100_serial_setbrg(void)
 {
 	unsigned int reg = 0;
 
@@ -89,7 +91,7 @@ void serial_setbrg (void)
  * are always 8 data bits, no parity, 1 stop bit, no start bits.
  *
  */
-int serial_init (void)
+static int sa1100_serial_init(void)
 {
 	serial_setbrg ();
 
@@ -100,7 +102,7 @@ int serial_init (void)
 /*
  * Output a single byte to the serial port.
  */
-void serial_putc (const char c)
+static void sa1100_serial_putc(const char c)
 {
 #ifdef CONFIG_SERIAL1
 	/* wait for room in the tx FIFO on SERIAL1 */
@@ -124,7 +126,7 @@ void serial_putc (const char c)
  * otherwise. When the function is succesfull, the character read is
  * written into its argument c.
  */
-int serial_tstc (void)
+static int sa1100_serial_tstc(void)
 {
 #ifdef CONFIG_SERIAL1
 	return Ser1UTSR1 & UTSR1_RNE;
@@ -138,7 +140,7 @@ int serial_tstc (void)
  * otherwise. When the function is succesfull, the character read is
  * written into its argument c.
  */
-int serial_getc (void)
+static int sa1100_serial_getc(void)
 {
 #ifdef CONFIG_SERIAL1
 	while (!(Ser1UTSR1 & UTSR1_RNE));
@@ -151,10 +153,62 @@ int serial_getc (void)
 #endif
 }
 
-void
-serial_puts (const char *s)
+static void sa1100_serial_puts(const char *s)
 {
 	while (*s) {
 		serial_putc (*s++);
 	}
 }
+
+#ifdef CONFIG_SERIAL_MULTI
+static struct serial_device sa1100_serial_drv = {
+	.name	= "sa1100_serial",
+	.start	= sa1100_serial_init,
+	.stop	= NULL,
+	.setbrg	= sa1100_serial_setbrg,
+	.putc	= sa1100_serial_putc,
+	.puts	= sa1100_serial_puts,
+	.getc	= sa1100_serial_getc,
+	.tstc	= sa1100_serial_tstc,
+};
+
+void sa1100_serial_initialize(void)
+{
+	serial_register(&sa1100_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+	return &sa1100_serial_drv;
+}
+#else
+int serial_init(void)
+{
+	return sa1100_serial_init();
+}
+
+void serial_setbrg(void)
+{
+	sa1100_serial_setbrg();
+}
+
+void serial_putc(const char c)
+{
+	sa1100_serial_putc(c);
+}
+
+void serial_puts(const char *s)
+{
+	sa1100_serial_puts(s);
+}
+
+int serial_getc(void)
+{
+	return sa1100_serial_getc();
+}
+
+int serial_tstc(void)
+{
+	return sa1100_serial_tstc();
+}
+#endif