From patchwork Fri May 23 04:32:54 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huang Shijie X-Patchwork-Id: 4228211 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5687BBF90B for ; Fri, 23 May 2014 05:54:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8A4D720397 for ; Fri, 23 May 2014 05:54:35 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8D8C7201ED for ; Fri, 23 May 2014 05:54:34 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WniPE-0006hM-Vj; Fri, 23 May 2014 05:52:36 +0000 Received: from mail-bl2lp0212.outbound.protection.outlook.com ([207.46.163.212] helo=na01-bl2-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WniPA-0006T5-7O for linux-arm-kernel@lists.infradead.org; Fri, 23 May 2014 05:52:32 +0000 Received: from CH1PR03CA009.namprd03.prod.outlook.com (10.255.156.154) by DM2PR03MB432.namprd03.prod.outlook.com (10.141.85.21) with Microsoft SMTP Server (TLS) id 15.0.944.11; Fri, 23 May 2014 05:52:02 +0000 Received: from BL2FFO11FD027.protection.gbl (10.255.156.132) by CH1PR03CA009.outlook.office365.com (10.255.156.154) with Microsoft SMTP Server (TLS) id 15.0.944.11 via Frontend Transport; Fri, 23 May 2014 05:52:01 +0000 Received: from tx30smr01.am.freescale.net (192.88.168.1) by BL2FFO11FD027.mail.protection.outlook.com (10.173.161.106) with Microsoft SMTP Server (TLS) id 15.0.949.9 via Frontend Transport; Fri, 23 May 2014 05:52:01 +0000 Received: from shlinux1.ap.freescale.net (shlinux1.ap.freescale.net [10.192.225.216]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id s4N5ps01000661; Thu, 22 May 2014 22:51:58 -0700 From: Huang Shijie To: Subject: [PATCH 2/2] serial: imx: disable the receiver ready interrupt for imx_stop_rx Date: Fri, 23 May 2014 12:32:54 +0800 Message-ID: <1400819575-20435-2-git-send-email-b32955@freescale.com> X-Mailer: git-send-email 1.7.8 In-Reply-To: <1400819575-20435-1-git-send-email-b32955@freescale.com> References: <1400819575-20435-1-git-send-email-b32955@freescale.com> X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.1; CTRY:US; IPV:CAL; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(6009001)(199002)(189002)(50466002)(85852003)(83072002)(62966002)(77156001)(76482001)(26826002)(36756003)(93916002)(46102001)(77982001)(102836001)(92726001)(81542001)(50986999)(76176999)(92566001)(4396001)(99396002)(50226001)(81342001)(33646001)(80022001)(31966008)(64706001)(74662001)(19580395003)(19580405001)(79102001)(20776003)(87286001)(44976005)(74502001)(47776003)(83322001)(89996001)(77096999)(48376002)(87936001)(6806004)(21056001)(88136002)(42262001); DIR:OUT; SFP:; SCL:1; SRVR:DM2PR03MB432; H:tx30smr01.am.freescale.net; FPR:; MLV:ovrnspm; PTR:gate-tx3.freescale.com; A:1; MX:1; LANG:en; MIME-Version: 1.0 X-Forefront-PRVS: 0220D4B98D Received-SPF: Fail (: domain of freescale.com does not designate 192.88.168.1 as permitted sender) receiver=; client-ip=192.88.168.1; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.1) smtp.mailfrom=shijie.huang@freescale.com; X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140522_225232_381459_E57E3867 X-CRM114-Status: UNSURE ( 8.00 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: linux-arm-kernel@lists.infradead.org, Huang Shijie , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch disables the receiver ready interrupt for imx_stop_rx. It reduces the interrupt numbers when the uart is going to close or suspend. Signed-off-by: Huang Shijie --- drivers/tty/serial/imx.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index ed6cdf7..6026101 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -440,6 +440,10 @@ static void imx_stop_rx(struct uart_port *port) temp = readl(sport->port.membase + UCR2); writel(temp & ~UCR2_RXEN, sport->port.membase + UCR2); + + /* disable the `Receiver Ready Interrrupt` */ + temp = readl(sport->port.membase + UCR1); + writel(temp & ~UCR1_RRDYEN, sport->port.membase + UCR1); } /*