uartlite: Adding a kernel parameter for the number of uartlites

The number of uartlites should be set by a kernel parameter instead of
using a #define. This allows the user to set the number of uartlites
using only kconfig and not modifying kernel source.

The uartlite is used by FPGAs that support a basically unlimited number
of uarts so limiting it at 16 dosn't make sense as users might need more
than that.

Signed-off-by: Sam Povilus <kernel.development@povil.us>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index d8495b9..896f5eb 100644 (file)
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -630,6 +630,15 @@ config SERIAL_UARTLITE_CONSOLE
          console (the system console is the device which receives all kernel
          messages and warnings and which allows logins in single user mode).
 
+config SERIAL_UARTLITE_NR_UARTS
+       int "Maximum number of uartlite serial ports"
+       depends on SERIAL_UARTLITE
+       range 1 256
+       default 1
+       help
+         Set this to the number of uartlites in your system, or the number
+         you think you might implement.
+
 config SERIAL_SUNCORE
        bool
        depends on SPARC

diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c
index 817bb0d..c9b8d70 100644 (file)
--- a/drivers/tty/serial/uartlite.c
+++ b/drivers/tty/serial/uartlite.c
@@ -28,7 +28,7 @@
 #define ULITE_NAME             "ttyUL"
 #define ULITE_MAJOR            204
 #define ULITE_MINOR            187
-#define ULITE_NR_UARTS         16
+#define ULITE_NR_UARTS         CONFIG_SERIAL_UARTLITE_NR_UARTS
 
 /* ---------------------------------------------------------------------
  * Register definitions