Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756655AbZFINrs (ORCPT ); Tue, 9 Jun 2009 09:47:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752547AbZFINq4 (ORCPT ); Tue, 9 Jun 2009 09:46:56 -0400 Received: from mx1.emlix.com ([193.175.82.87]:44944 "EHLO mx1.emlix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751534AbZFINqx (ORCPT ); Tue, 9 Jun 2009 09:46:53 -0400 From: "Oskar Schirmer" To: Sascha Hauer Cc: linux-kernel@vger.kernel.org, Fabian Godehardt , Oskar Schirmer Subject: [PATCH 4/8] imx: serial: be sure to stop xmit upon shutdown Date: Tue, 9 Jun 2009 15:46:47 +0200 Message-Id: <1244555211-15618-5-git-send-email-os@emlix.com> In-Reply-To: <1244555211-15618-4-git-send-email-os@emlix.com> References: <1244555211-15618-1-git-send-email-os@emlix.com> <1244555211-15618-2-git-send-email-os@emlix.com> <1244555211-15618-3-git-send-email-os@emlix.com> <1244555211-15618-4-git-send-email-os@emlix.com> Organization: emlix gmbh, Goettingen, Germany Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1094 Lines: 36 From: Fabian Godehardt needed to avoid continued transmission by hardware while software already shuts down, which might cause dangling characters to show up in hardware queues when restarting the device. Signed-off-by: Fabian Godehardt Signed-off-by: Oskar Schirmer --- drivers/serial/imx.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c index afcec9e..3fa07a9 100644 --- a/drivers/serial/imx.c +++ b/drivers/serial/imx.c @@ -634,6 +634,10 @@ static void imx_shutdown(struct uart_port *port) struct imx_port *sport = (struct imx_port *)port; unsigned long temp; + temp = readl(sport->port.membase + UCR2); + temp &= ~(UCR2_TXEN); + writel(temp, sport->port.membase + UCR2); + /* * Stop our timer. */ -- 1.5.3.7 -- 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/