Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753600AbYKYVLz (ORCPT ); Tue, 25 Nov 2008 16:11:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752376AbYKYVLT (ORCPT ); Tue, 25 Nov 2008 16:11:19 -0500 Received: from 81-174-11-161.static.ngi.it ([81.174.11.161]:52575 "EHLO mail.enneenne.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752234AbYKYVLS (ORCPT ); Tue, 25 Nov 2008 16:11:18 -0500 From: Rodolfo Giometti To: linux-kernel@vger.kernel.org Cc: Andrew Morton , David Woodhouse , Dave Jones , Sam Ravnborg , Greg KH , Randy Dunlap , Kay Sievers , Alan Cox , "H. Peter Anvin" , Ingo Molnar , Michael Kerrisk , Rodolfo Giometti Date: Tue, 25 Nov 2008 22:11:07 +0100 Message-Id: <1227647470-4816-2-git-send-email-giometti@linux.it> X-Mailer: git-send-email 1.5.4.3 In-Reply-To: <1227647470-4816-1-git-send-email-giometti@linux.it> References: <> <1227647470-4816-1-git-send-email-giometti@linux.it> X-SA-Exim-Connect-IP: 192.168.32.254 X-SA-Exim-Mail-From: giometti@enneenne.com Subject: [PATCH] ldisc: new dcd_change() method for line disciplines. X-SA-Exim-Version: 4.2.1 (built Tue, 09 Jan 2007 17:23:22 +0000) X-SA-Exim-Scanned: Yes (on mail.enneenne.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1938 Lines: 62 Signed-off-by: Rodolfo Giometti --- Documentation/tty.txt | 4 ++++ include/linux/tty_ldisc.h | 10 ++++++++++ 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/Documentation/tty.txt b/Documentation/tty.txt index 8e65c44..3fc812a 100644 --- a/Documentation/tty.txt +++ b/Documentation/tty.txt @@ -100,6 +100,10 @@ write_wakeup() - May be called at any point between open and close. is permitted to call the driver write method from this function. In such a situation defer it. +dcd_change() - Report to the tty line the current DCD pin status + changes and the relative timestamp. The timestamp + can be NULL. + Driver Access diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h index 6226504..a135d6c 100644 --- a/include/linux/tty_ldisc.h +++ b/include/linux/tty_ldisc.h @@ -99,11 +99,19 @@ * cease I/O to the tty driver. Can sleep. The driver should * seek to perform this action quickly but should wait until * any pending driver I/O is completed. + * + * void (*dcd_change)(struct uart_port *port, unsigned int status, + * struct timespec *ts) + * + * Tells the discipline that the DCD pin has changed its status and + * the relative timestamp. Pointer ts can be NULL. */ #include #include +struct uart_port; + struct tty_ldisc { int magic; char *name; @@ -136,6 +144,8 @@ struct tty_ldisc { void (*receive_buf)(struct tty_struct *, const unsigned char *cp, char *fp, int count); void (*write_wakeup)(struct tty_struct *); + void (*dcd_change)(struct uart_port *, unsigned int, + struct timespec *); struct module *owner; -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/