ICRNL
drv->init_termios.c_iflag = ICRNL;
| ICRNL /* disable translate CR to NL */
INLCR | IGNCR | ICRNL | IXON);
.c_iflag = ICRNL | IXON,
termios->c_iflag = ICRNL | IXON;
| ICRNL /* disable translate CR to NL */
| ICRNL /* disable translate CR to NL */
#define I_ICRNL(tty) _I_FLAG((tty), ICRNL)