[PATCH] ioctl for getting RS485 information on Cris architecture
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From: Claudio Scordino on 31 May 2010 04:20 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(a)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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |