From patchwork Tue Jan 21 09:12:29 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ezequiel Garcia X-Patchwork-Id: 3515671 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 4AE819F2E9 for ; Tue, 21 Jan 2014 09:15:11 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3814B20108 for ; Tue, 21 Jan 2014 09:15:10 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (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 1EFB0200DB for ; Tue, 21 Jan 2014 09:15:09 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W5XPC-0005e6-4P; Tue, 21 Jan 2014 09:13:58 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1W5XOq-00069y-Jt; Tue, 21 Jan 2014 09:13:36 +0000 Received: from top.free-electrons.com ([176.31.233.9] helo=mail.free-electrons.com) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1W5XOF-00063h-0F for linux-arm-kernel@lists.infradead.org; Tue, 21 Jan 2014 09:13:00 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 0867A7DD; Tue, 21 Jan 2014 10:12:52 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (unknown [190.2.98.212]) by mail.free-electrons.com (Postfix) with ESMTPA id ECD0B750; Tue, 21 Jan 2014 10:12:47 +0100 (CET) From: Ezequiel Garcia To: , , Subject: [PATCH v2 03/15] watchdog: orion: Use atomic access for shared registers Date: Tue, 21 Jan 2014 06:12:29 -0300 Message-Id: <1390295561-3466-4-git-send-email-ezequiel.garcia@free-electrons.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1390295561-3466-1-git-send-email-ezequiel.garcia@free-electrons.com> References: <1390295561-3466-1-git-send-email-ezequiel.garcia@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140121_041259_189008_14280722 X-CRM114-Status: UNSURE ( 7.41 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.8 (-) Cc: Lior Amsalem , Thomas Petazzoni , Jason Cooper , Tawfik Bayouk , Andrew Lunn , Jason Gunthorpe , Wim Van Sebroeck , Ezequiel Garcia , Gregory Clement , Sebastian Hesselbarth 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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Since the timer control register is shared with the clocksource driver, use the recently introduced atomic_io_clear_set() to access such register. Signed-off-by: Ezequiel Garcia --- drivers/watchdog/orion_wdt.c | 20 ++++---------------- 1 file changed, 4 insertions(+), 16 deletions(-) diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c index f7722a4..cf64510 100644 --- a/drivers/watchdog/orion_wdt.c +++ b/drivers/watchdog/orion_wdt.c @@ -61,8 +61,6 @@ static int orion_wdt_ping(struct watchdog_device *wdt_dev) static int orion_wdt_start(struct watchdog_device *wdt_dev) { - u32 reg; - spin_lock(&wdt_lock); /* Set watchdog duration */ @@ -72,14 +70,10 @@ static int orion_wdt_start(struct watchdog_device *wdt_dev) writel(~WDT_INT_REQ, BRIDGE_CAUSE); /* Enable watchdog timer */ - reg = readl(wdt_reg + TIMER_CTRL); - reg |= WDT_EN; - writel(reg, wdt_reg + TIMER_CTRL); + atomic_io_modify(wdt_reg + TIMER_CTRL, WDT_EN, WDT_EN); /* Enable reset on watchdog */ - reg = readl(RSTOUTn_MASK); - reg |= WDT_RESET_OUT_EN; - writel(reg, RSTOUTn_MASK); + atomic_io_modify(RSTOUTn_MASK, WDT_RESET_OUT_EN, WDT_RESET_OUT_EN); spin_unlock(&wdt_lock); return 0; @@ -87,19 +81,13 @@ static int orion_wdt_start(struct watchdog_device *wdt_dev) static int orion_wdt_stop(struct watchdog_device *wdt_dev) { - u32 reg; - spin_lock(&wdt_lock); /* Disable reset on watchdog */ - reg = readl(RSTOUTn_MASK); - reg &= ~WDT_RESET_OUT_EN; - writel(reg, RSTOUTn_MASK); + atomic_io_modify(RSTOUTn_MASK, WDT_RESET_OUT_EN, 0); /* Disable watchdog timer */ - reg = readl(wdt_reg + TIMER_CTRL); - reg &= ~WDT_EN; - writel(reg, wdt_reg + TIMER_CTRL); + atomic_io_modify(wdt_reg + TIMER_CTRL, WDT_EN, 0); spin_unlock(&wdt_lock); return 0;