[ARM] S3C: Update number of serial ports

Update the serial driver to handle the 4 ports of the
S3C2443 and S364XX series.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

2 files changed, 28 insertions, 12 deletions

diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index e4ae499e587e..b695ab3142d8 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -455,6 +455,16 @@ config SERIAL_SAMSUNG
           provide all of these ports, depending on how the serial port
           pins are configured.
 
+config SERIAL_SAMSUNG_UARTS
+        int
+        depends on SERIAL_SAMSUNG
+        default 2 if ARCH_S3C2400
+        default 4 if ARCH_S3C64XX || CPU_S3C2443
+        default 3
+        help
+          Select the number of available UART ports for the Samsung S3C
+          serial driver
+        
 config SERIAL_SAMSUNG_DEBUG
         bool "Samsung SoC serial debug"
         depends on SERIAL_SAMSUNG && DEBUG_LL
diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c
index ba2e8685f9f5..ec873af26101 100644
--- a/drivers/serial/samsung.c
+++ b/drivers/serial/samsung.c
@@ -59,14 +59,6 @@
 #define S3C24XX_SERIAL_MAJOR    204
 #define S3C24XX_SERIAL_MINOR    64
 
-/* we can support 3 uarts, but not always use them */
-
-#if defined(CONFIG_CPU_S3C2400) || defined(CONFIG_CPU_S3C24A0)
-#define NR_PORTS (2)
-#else
-#define NR_PORTS (3)
-#endif
-
 /* macros to change one thing to another */
 
 #define tx_enabled(port) ((port)->unused[0])
@@ -839,7 +831,7 @@ static struct uart_driver s3c24xx_uart_drv = {
         .minor          = S3C24XX_SERIAL_MINOR,
 };
 
-static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
+static struct s3c24xx_uart_port s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
         [0] = {
                 .port = {
                         .lock           = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[0].port.lock),
@@ -864,7 +856,7 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
                         .line           = 1,
                 }
         },
-#if NR_PORTS > 2
+#if CONFIG_SERIAL_SAMSUNG_UARTS > 2
 
         [2] = {
                 .port = {
@@ -877,6 +869,20 @@ static struct s3c24xx_uart_port s3c24xx_serial_ports[NR_PORTS] = {
                         .flags          = UPF_BOOT_AUTOCONF,
                         .line           = 2,
                 }
+        },
+#endif
+#if CONFIG_SERIAL_SAMSUNG_UARTS > 3
+        [3] = {
+                .port = {
+                        .lock           = __SPIN_LOCK_UNLOCKED(s3c24xx_serial_ports[3].port.lock),
+                        .iotype         = UPIO_MEM,
+                        .irq            = IRQ_S3CUART_RX3,
+                        .uartclk        = 0,
+                        .fifosize       = 16,
+                        .ops            = &s3c24xx_serial_ops,
+                        .flags          = UPF_BOOT_AUTOCONF,
+                        .line           = 3,
+                }
         }
 #endif
 };
@@ -1324,7 +1330,7 @@ static int s3c24xx_serial_init_ports(struct s3c24xx_uart_info *info)
 
         platdev_ptr = s3c24xx_uart_devs;
 
-        for (i = 0; i < NR_PORTS; i++, ptr++, platdev_ptr++) {
+        for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++, ptr++, platdev_ptr++) {
                 s3c24xx_serial_init_port(ptr, info, *platdev_ptr);
         }
 
@@ -1345,7 +1351,7 @@ s3c24xx_serial_console_setup(struct console *co, char *options)
 
         /* is this a valid port */
 
-        if (co->index == -1 || co->index >= NR_PORTS)
+        if (co->index == -1 || co->index >= CONFIG_SERIAL_SAMSUNG_UARTS)
                 co->index = 0;
 
         port = &s3c24xx_serial_ports[co->index].port;