Hi, I have updated the patches based on feedback. For patch 1, In favour of consistency, I've updated the code which extracts trailing digits so that it is like similar code in tty_find_polling_driver. Also fixed checkpatch warnings.
Here's summary of the patches Patch 1 adds functionality to convert device name into dev_t. Patch 2 uses the function in patch 1 and performs some checks. Patch 3 adds new module param and actually extends support to more than ttyS*. Thanks, Okash
