OPOST
new.c_oflag |= OPOST;
ttyprintk_driver->init_termios.c_oflag = OPOST | OCRNL | ONOCR | ONLRET;
drv->init_termios.c_oflag = OPOST | ONLCR;
termios->c_oflag &= ~OPOST;
.c_oflag = OPOST,
rpmsg_tty_driver->init_termios.c_oflag &= ~(OPOST | ONLCR);
ktermios.c_oflag &= ~OPOST;
.c_oflag = OPOST | ONLCR,
termios->c_oflag |= OPOST | ONLCR;
driver->init_termios.c_oflag = OPOST | OCRNL | ONOCR | ONLRET;
.c_oflag = OPOST,
&= ~OPOST; /* disable postprocess output char */
&= ~OPOST; /* disable postprocess output characters */
#define O_OPOST(tty) _O_FLAG((tty), OPOST)