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    Subject[PATCH] ioctl for getting RS485 information on Cris architecture
    Hi Jesper, hi Mikael, 

    I think that the Cris architecture should provide a full RS485 interface (like the atmel_serial driver).

    Therefore, I propose this patch which adds an ioctl to get RS485 information from user-level.

    Best regards,

    Claudio


    Cris serial driver: ioctl to get RS485 data from user-space

    Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
    ---
    arch/cris/include/asm/ioctls.h | 1 +
    drivers/serial/crisv10.c | 11 +++++++++++
    2 files changed, 12 insertions(+), 0 deletions(-)

    diff --git a/arch/cris/include/asm/ioctls.h b/arch/cris/include/asm/ioctls.h
    index 35bbc18..076c078 100644
    --- a/arch/cris/include/asm/ioctls.h
    +++ b/arch/cris/include/asm/ioctls.h
    @@ -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
    diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
    index 31f1723..3062644 100644
    --- a/drivers/serial/crisv10.c
    +++ b/drivers/serial/crisv10.c
    @@ -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:
    {
    --
    1.6.0.4


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