[PATCH v4] uartlite: Adding a kernel parameter for the number of uartlites

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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@xxxxxxxx>
---
 drivers/tty/serial/Kconfig    | 8 ++++++++
 drivers/tty/serial/uartlite.c | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index e9cf5b67f1b7..5f0bf4cfcf2a 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -630,6 +630,14 @@ 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
+	default "16"
+	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 817bb0d3f326..c9b8d702dadc 100644
--- 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
-- 
2.11.0

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