On Sat, Jan 7, 2017 at 5:00 AM, Andy Shevchenko
[off-list ref] wrote:

On Fri, 2017-01-06 at 10:26 -0600, Rob Herring wrote:

quoted

Here goes another attempt at a serial device bus (aka uart slaves, tty
slaves, etc.).

After some discussions with Dmitry at LPC, I decided to move away from
extending serio and moved back to making a new bus type instead. He
didn't
think using serio was a good fit, and serio has a number of
peculiarities
in regards to sysfs and it's driver model. I don't think we want to
inherit
those for serial slave devices.

This version sits on top of tty_port rather than uart_port as Alan
requested. Once I created a struct tty rather than moving everything
needed to tty_port, it became a lot easier and less invasive to the
tty
core code.

I have hacked up versions of the BT ldisc and TI ST drivers moved over
to
use the serdev bus. I have BT working on the HiKey board which has TI
BT.
With the serdev bus support, it eliminates the need for the TI
userspace
UIM daemon.

This series and the mentioned drivers can be found here[1].

For patches 1-4:
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Thanks.

Regarding to naming. Why can't we just name bus "serial"? If you are
worrying about folder name under drivers/tty, I can propose at lease
couple of options serialdev, serialbus.

Naming is hard, right?

I have don't have too much opinion on what the name should be. I just
came up with something unique and inspired by serio. It is a bit
easier to grep for serdev rather than just serial.

Rob