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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>
This commit is contained in:
Sam Povilus 2017-03-15 20:43:24 -06:00 committed by Greg Kroah-Hartman
parent 81e33b51ed
commit b44b96a060
2 changed files with 10 additions and 1 deletions
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9
drivers/tty/serial/Kconfig
View File

@ -630,6 +630,15 @@ config SERIAL_UARTLITE_CONSOLE
console (the system console is the device which receives all kernel console (the system console is the device which receives all kernel
messages and warnings and which allows logins in single user mode). 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 config SERIAL_SUNCORE
bool bool
depends on SPARC depends on SPARC

2
drivers/tty/serial/uartlite.c
View File

@ -28,7 +28,7 @@
#define ULITE_NAME "ttyUL" #define ULITE_NAME "ttyUL"
#define ULITE_MAJOR 204 #define ULITE_MAJOR 204
#define ULITE_MINOR 187 #define ULITE_MINOR 187
#define ULITE_NR_UARTS 16 #define ULITE_NR_UARTS CONFIG_SERIAL_UARTLITE_NR_UARTS
/* --------------------------------------------------------------------- /* ---------------------------------------------------------------------
* Register definitions * Register definitions