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CRIS: ioctl for getting RS485 information
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Add ioctl to CRIS serial driver to get RS485 data from user-space.

Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
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Claudio Scordino authored and Jesper Nilsson committed Aug 9, 2010
1 parent 9fe6206 commit f1d23ed
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Showing 2 changed files with 12 additions and 0 deletions.
1 change: 1 addition & 0 deletions arch/cris/include/asm/ioctls.h
Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,7 @@
#define TIOCSERSETRS485 0x5461 /* enable rs-485 (deprecated) */
#define TIOCSERWRRS485 0x5462 /* write rs-485 */
#define TIOCSRS485 0x5463 /* enable rs-485 */
#define TIOCGRS485 0x542E /* get rs-485 */

/* Used for packet mode */
#define TIOCPKT_DATA 0
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11 changes: 11 additions & 0 deletions drivers/serial/crisv10.c
Original file line number Diff line number Diff line change
Expand Up @@ -3724,6 +3724,17 @@ rs_ioctl(struct tty_struct *tty, struct file * file,
return e100_enable_rs485(tty, &rs485data);
}

case TIOCGRS485:
{
struct serial_rs485 *rs485data =
&(((struct e100_serial *)tty->driver_data)->rs485);
/* This is the ioctl to get RS485 data from user-space */
if (copy_to_user((struct serial_rs485 *) arg,
rs485data,
sizeof(serial_rs485)))
return -EFAULT;
break;
}

case TIOCSERWRRS485:
{
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