On Wed, May 08, 2013 at 04:34:43PM +0200, Arnd Bergmann wrote:

quoted

+#define ASC_MAJOR		204
+#define ASC_MINOR_START		40

I don't know what the current policy is on allocating major/minor numbers,
but I'm sure you cannot just reuse one that is already used.

I agree, why are you trying to create a new tty device name?  Can't you
use the existing ttyS name and minor number as you will not have any
other type of serial device on this system?

thanks,

greg k-h