serial: powerpc: Implement CONFIG_SERIAL_MULTI into evb64260 serial driver

Implement support for CONFIG_SERIAL_MULTI into evb64260 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 evb64260 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>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefan Roese <sr@denx.de>

board/evb64260/serial.c

@@ -30,6 +30,8 @@
 #include <common.h>
 #include <command.h>
 #include <galileo/memory.h>
+#include <serial.h>
+#include <linux/compiler.h>
 
 #if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
 #include <ns16550.h>
@@ -48,7 +50,7 @@ const NS16550_t COM_PORTS[] = { (NS16550_t) CONFIG_SYS_NS16550_COM1,
 
 #ifdef CONFIG_MPSC
 
-int serial_init (void)
+static int evb64260_serial_init(void)
 {
 #if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
 	int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
@@ -66,8 +68,7 @@ int serial_init (void)
 	return (0);
 }
 
-void
-serial_putc(const char c)
+static void evb64260_serial_putc(const char c)
 {
 	if (c == '\n')
 		mpsc_putchar('\r');
@@ -75,27 +76,24 @@ serial_putc(const char c)
 	mpsc_putchar(c);
 }
 
-int
-serial_getc(void)
+static int evb64260_serial_getc(void)
 {
 	return mpsc_getchar();
 }
 
-int
-serial_tstc(void)
+static int evb64260_serial_tstc(void)
 {
 	return mpsc_test_char();
 }
 
-void
-serial_setbrg (void)
+static void evb64260_serial_setbrg(void)
 {
 	galbrg_set_baudrate(CONFIG_MPSC_PORT, gd->baudrate);
 }
 
 #else /* ! CONFIG_MPSC */
 
-int serial_init (void)
+static int evb64260_serial_init(void)
 {
 	int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
 
@@ -109,8 +107,7 @@ int serial_init (void)
 	return (0);
 }
 
-void
-serial_putc(const char c)
+static void evb64260_serial_putc(const char c)
 {
 	if (c == '\n')
 		NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], '\r');
@@ -118,20 +115,17 @@ serial_putc(const char c)
 	NS16550_putc(COM_PORTS[CONFIG_SYS_DUART_CHAN], c);
 }
 
-int
-serial_getc(void)
+static int evb64260_serial_getc(void)
 {
 	return NS16550_getc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
 }
 
-int
-serial_tstc(void)
+static int evb64260_serial_tstc(void)
 {
 	return NS16550_tstc(COM_PORTS[CONFIG_SYS_DUART_CHAN]);
 }
 
-void
-serial_setbrg (void)
+static void evb64260_serial_setbrg(void)
 {
 	int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
 
@@ -145,14 +139,65 @@ serial_setbrg (void)
 
 #endif /* CONFIG_MPSC */
 
-void
-serial_puts (const char *s)
+static void evb64260_serial_puts(const char *s)
 {
 	while (*s) {
 		serial_putc (*s++);
 	}
 }
 
+#ifdef CONFIG_SERIAL_MULTI
+static struct serial_device evb64260_serial_drv = {
+	.name	= "evb64260_serial",
+	.start	= evb64260_serial_init,
+	.stop	= NULL,
+	.setbrg	= evb64260_serial_setbrg,
+	.putc	= evb64260_serial_putc,
+	.puts	= evb64260_serial_puts,
+	.getc	= evb64260_serial_getc,
+	.tstc	= evb64260_serial_tstc,
+};
+
+void evb64260_serial_initialize(void)
+{
+	serial_register(&evb64260_serial_drv);
+}
+
+__weak struct serial_device *default_serial_console(void)
+{
+	return &evb64260_serial_drv;
+}
+#else
+int serial_init(void)
+{
+	return evb64260_serial_init();
+}
+
+void serial_setbrg(void)
+{
+	evb64260_serial_setbrg();
+}
+
+void serial_putc(const char c)
+{
+	evb64260_serial_putc(c);
+}
+
+void serial_puts(const char *s)
+{
+	evb64260_serial_puts(s);
+}
+
+int serial_getc(void)
+{
+	return evb64260_serial_getc();
+}
+
+int serial_tstc(void)
+{
+	return evb64260_serial_tstc();
+}
+#endif
 #if defined(CONFIG_CMD_KGDB)
 void
 kgdb_serial_init(void)

common/serial.c

@@ -66,6 +66,7 @@ serial_initfunc(amirix_serial_initialize);
 serial_initfunc(bmw_serial_initialize);
 serial_initfunc(cogent_serial_initialize);
 serial_initfunc(cpci750_serial_initialize);
+serial_initfunc(evb64260_serial_initialize);
 
 void serial_register(struct serial_device *dev)
 {
@@ -110,6 +111,7 @@ void serial_initialize(void)
 	bmw_serial_initialize();
 	cogent_serial_initialize();
 	cpci750_serial_initialize();
+	evb64260_serial_initialize();
 
 	serial_assign(default_serial_console()->name);
 }