[PATCH 1/2] ARM: S3C2412: SoC has the fractional baud rate register

[PATCH 1/2] ARM: S3C2412: SoC has the fractional baud rate register

[Michel Pollet]

The S3C2412 has a fractional baud rate register, this patch adds the
corresponding flag to the UART definition to allow generation of more
precise baud rates for the various clock combinations.

Signed-off-by: Michel Pollet <buserror@gmail.com>
---
 drivers/serial/s3c2412.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/serial/s3c2412.c b/drivers/serial/s3c2412.c
index ce75e28..1700b1a 100644
--- a/drivers/serial/s3c2412.c
+++ b/drivers/serial/s3c2412.c
@@ -102,6 +102,7 @@ static struct s3c24xx_uart_info s3c2412_uart_inf = {
 	.name		= "Samsung S3C2412 UART",
 	.type		= PORT_S3C2412,
 	.fifosize	= 64,
+	.has_divslot	= 1,
 	.rx_fifomask	= S3C2440_UFSTAT_RXMASK,
 	.rx_fifoshift	= S3C2440_UFSTAT_RXSHIFT,
 	.rx_fifofull	= S3C2440_UFSTAT_RXFULL,
-- 
1.6.6

[PATCH 2/2] ARM: S3C: Configuration override for UART names

[Michel Pollet]

S3C UART devices  are named s3c2410_serialX and it is
inconsistent with the kernel at boot time (console=ttySACx)
This patch allows the config file to override this and
use the standard name instead.

Signed-off-by: Michel Pollet <buserror@gmail.com>
---
 arch/arm/plat-s3c/Kconfig |    9 +++++++++
 drivers/serial/samsung.c  |    9 ++++++++-
 2 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index 9e9d028..158257a 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -113,6 +113,15 @@ config S3C_LOWLEVEL_UART_PORT
 	  this configuration should be between zero and two. The port
 	  must have been initialised by the boot-loader before use.
 
+config S3C_STD_UART_NAMES
+	bool "Name S3C UART device files as ttySACx"
+	default n
+	help
+	  The kernel and most other SoC use the ttySACx naming scheme
+	  for UART device file naming. The default for S3C is to use
+	  s3c2410_serialX, and it confuses a lot of distros; it is also
+	  inconsistent with the console= kernel parameter.
+
 # options for gpiolib support
 
 config S3C_GPIO_SPACE
diff --git a/drivers/serial/samsung.c b/drivers/serial/samsung.c
index 52e3df1..e3dd135 100644
--- a/drivers/serial/samsung.c
+++ b/drivers/serial/samsung.c
@@ -55,7 +55,14 @@
 
 /* UART name and device definitions */
 
+#ifdef CONFIG_S3C_STD_UART_NAMES
+/* All other SoC use this naming sheme, 
+   including the kernel earlier at boot time */
 #define S3C24XX_SERIAL_NAME	"ttySAC"
+#else
+/* Legacy option */
+#define S3C24XX_SERIAL_NAME	"s3c2410_serial"
+#endif
 #define S3C24XX_SERIAL_MAJOR	204
 #define S3C24XX_SERIAL_MINOR	64
 
@@ -878,7 +885,7 @@ static struct uart_ops s3c24xx_serial_ops = {
 
 static struct uart_driver s3c24xx_uart_drv = {
 	.owner		= THIS_MODULE,
-	.dev_name	= "s3c2410_serial",
+	.dev_name	= S3C24XX_SERIAL_NAME,
 	.nr		= CONFIG_SERIAL_SAMSUNG_UARTS,
 	.cons		= S3C24XX_SERIAL_CONSOLE,
 	.driver_name	= S3C24XX_SERIAL_NAME,
-- 
1.6.6

[PATCH 2/2] ARM: S3C: Configuration override for UART names

[Russell King - ARM Linux]

On Wed, Jan 27, 2010 at 04:38:09PM +0000, Michel Pollet wrote:
> diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
> index 9e9d028..158257a 100644
> --- a/arch/arm/plat-s3c/Kconfig
> +++ b/arch/arm/plat-s3c/Kconfig
> @@ -113,6 +113,15 @@ config S3C_LOWLEVEL_UART_PORT
>  	  this configuration should be between zero and two. The port
>  	  must have been initialised by the boot-loader before use.
>  
> +config S3C_STD_UART_NAMES
> +	bool "Name S3C UART device files as ttySACx"
> +	default n

default n is the default default.  There's no need to explicitly specify
a default default.