1 files changed, 23 insertions, 40 deletions

diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 9cd706df3b33..1f5505e7f90d 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1282,6 +1282,14 @@ static int s3c24xx_serial_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto probe_err;
 
+	if (!s3c24xx_uart_drv.state) {
+		ret = uart_register_driver(&s3c24xx_uart_drv);
+		if (ret < 0) {
+			pr_err("Failed to register Samsung UART driver\n");
+			return ret;
+		}
+	}
+
 	dbg("%s: adding port\n", __func__);
 	uart_add_one_port(&s3c24xx_uart_drv, &ourport->port);
 	platform_set_drvdata(pdev, &ourport->port);
@@ -1321,6 +1329,8 @@ static int s3c24xx_serial_remove(struct platform_device *dev)
 		uart_remove_one_port(&s3c24xx_uart_drv, port);
 	}
 
+	uart_unregister_driver(&s3c24xx_uart_drv);
+
 	return 0;
 }
 
@@ -1436,8 +1446,8 @@ static int s3c24xx_serial_get_poll_char(struct uart_port *port)
 static void s3c24xx_serial_put_poll_char(struct uart_port *port,
 		unsigned char c)
 {
-	unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
-	unsigned int ucon = rd_regl(cons_uart, S3C2410_UCON);
+	unsigned int ufcon = rd_regl(port, S3C2410_UFCON);
+	unsigned int ucon = rd_regl(port, S3C2410_UCON);
 
 	/* not possible to xmit on unconfigured port */
 	if (!s3c24xx_port_configured(ucon))
@@ -1445,7 +1455,7 @@ static void s3c24xx_serial_put_poll_char(struct uart_port *port,
 
 	while (!s3c24xx_serial_console_txrdy(port, ufcon))
 		cpu_relax();
-	wr_regb(cons_uart, S3C2410_UTXH, c);
+	wr_regb(port, S3C2410_UTXH, c);
 }
 
 #endif /* CONFIG_CONSOLE_POLL */
@@ -1453,22 +1463,23 @@ static void s3c24xx_serial_put_poll_char(struct uart_port *port,
 static void
 s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
 {
-	unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
-	unsigned int ucon = rd_regl(cons_uart, S3C2410_UCON);
-
-	/* not possible to xmit on unconfigured port */
-	if (!s3c24xx_port_configured(ucon))
-		return;
+	unsigned int ufcon = rd_regl(port, S3C2410_UFCON);
 
 	while (!s3c24xx_serial_console_txrdy(port, ufcon))
-		barrier();
-	wr_regb(cons_uart, S3C2410_UTXH, ch);
+		cpu_relax();
+	wr_regb(port, S3C2410_UTXH, ch);
 }
 
 static void
 s3c24xx_serial_console_write(struct console *co, const char *s,
 			     unsigned int count)
 {
+	unsigned int ucon = rd_regl(cons_uart, S3C2410_UCON);
+
+	/* not possible to xmit on unconfigured port */
+	if (!s3c24xx_port_configured(ucon))
+		return;
+
 	uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar);
 }
 
@@ -1820,35 +1831,7 @@ static struct platform_driver samsung_serial_driver = {
 	},
 };
 
-/* module initialisation code */
-
-static int __init s3c24xx_serial_modinit(void)
-{
-	int ret;
-
-	ret = uart_register_driver(&s3c24xx_uart_drv);
-	if (ret < 0) {
-		pr_err("Failed to register Samsung UART driver\n");
-		return ret;
-	}
-
-	ret = platform_driver_register(&samsung_serial_driver);
-	if (ret < 0) {
-		pr_err("Failed to register platform driver\n");
-		uart_unregister_driver(&s3c24xx_uart_drv);
-	}
-
-	return ret;
-}
-
-static void __exit s3c24xx_serial_modexit(void)
-{
-	platform_driver_unregister(&samsung_serial_driver);
-	uart_unregister_driver(&s3c24xx_uart_drv);
-}
-
-module_init(s3c24xx_serial_modinit);
-module_exit(s3c24xx_serial_modexit);
+module_platform_driver(samsung_serial_driver);
 
 MODULE_ALIAS("platform:samsung-uart");
 MODULE_DESCRIPTION("Samsung SoC Serial port driver");