[PATCH 4/5] staging: speakup: add spk_ttyio

[Samuel Thibault]

Okash Khawaja, on Wed 08 Feb 2017 22:53:18 +0000, wrote:
> This adds spk_ttyio.c file which contains functions related to comms
> via TTY subsystem, using line discipline N_SPEAKUP.

Again, way more details will be welcome (really, see commits in the
linux git tree, commit logs are usually like 10-20 lines!): you need
to explain that previously speakup would, to access serial port, poke
standard ISA ports itself, by trying to steal it from the serial
driver. Some ISA cards actually need this way of doing it, but most
other synthesizers don't, and can actually work by using the proper TTY
subsystem through a new N_SPEAKUP line discipline. So this adds the
methods for drivers to switch to accessing serial ports through the TTY
subsystem, whenever appropriate.

Samuel