On Thu, Mar 20, 2014 at 06:52:10PM -0500, Felipe Balbi wrote:

Hi folks,

I've been toying with the idea of removing
drivers/tty/serial/omap-serial.c since that's, to put it bluntly, an
ungly copy of 8250 driver.

The original concern was wrt suspend/resume but I think it'd be a far
better approach to implement runtime PM in 8250 and write a rather small
8250-omap.c glue (much like 8250-acorn.c or 8250-dw.c) just to get the
OMAP-specific details out of the way.

The question I have is: omap-serial.c calls the serial devnodes ttyO\d,
instead of ttyS\d so removing omap-serial.c would have a direct impact
in userland. I wonder if it's an acceptable "regression" considering
we'd be able to reuse 8250 gaining proper Flow Control support, proper
DMA support, years and years of bug-fixes, etc.

Breaking device node names is a contentious issue for serial ports, I
don't think you can do that :(