From patchwork Mon Oct 28 22:49:18 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 3104811 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 194AE9F2B7 for ; Mon, 28 Oct 2013 23:00:43 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3A04020303 for ; Mon, 28 Oct 2013 23:00:42 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 49A1D20200 for ; Mon, 28 Oct 2013 23:00:41 +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 1VavnE-00063r-6T; Mon, 28 Oct 2013 23:00:16 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vavn5-0007lM-FR; Mon, 28 Oct 2013 23:00:07 +0000 Received: from perceval.ideasonboard.com ([95.142.166.194]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vavmt-0007k1-GM for linux-arm-kernel@lists.infradead.org; Mon, 28 Oct 2013 22:59:56 +0000 Received: from avalon.ideasonboard.com (unknown [91.177.152.157]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id E8EB135A49; Mon, 28 Oct 2013 23:48:30 +0100 (CET) From: Laurent Pinchart To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 01/12] clocksource: sh_cmt: Add clk_prepare/unprepare support Date: Mon, 28 Oct 2013 23:49:18 +0100 Message-Id: <1383000569-8916-2-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1383000569-8916-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> References: <1383000569-8916-1-git-send-email-laurent.pinchart+renesas@ideasonboard.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131028_185955_688841_CA22F699 X-CRM114-Status: GOOD ( 10.04 ) X-Spam-Score: -2.4 (--) Cc: Daniel Lezcano , Mike Turquette , linux-kernel@vger.kernel.org, linux-sh@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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Prepare the clock at probe time, as there is no other appropriate place in the driver where we're allowed to sleep. Cc: Daniel Lezcano Cc: linux-kernel@vger.kernel.org Signed-off-by: Laurent Pinchart Acked-by: Simon Horman --- drivers/clocksource/sh_cmt.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index 0965e98..940341a 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -634,12 +634,18 @@ static int sh_cmt_clock_event_next(unsigned long delta, static void sh_cmt_clock_event_suspend(struct clock_event_device *ced) { - pm_genpd_syscore_poweroff(&ced_to_sh_cmt(ced)->pdev->dev); + struct sh_cmt_priv *p = ced_to_sh_cmt(ced); + + pm_genpd_syscore_poweroff(&p->pdev->dev); + clk_unprepare(p->clk); } static void sh_cmt_clock_event_resume(struct clock_event_device *ced) { - pm_genpd_syscore_poweron(&ced_to_sh_cmt(ced)->pdev->dev); + struct sh_cmt_priv *p = ced_to_sh_cmt(ced); + + clk_prepare(p->clk); + pm_genpd_syscore_poweron(&p->pdev->dev); } static void sh_cmt_register_clockevent(struct sh_cmt_priv *p, @@ -737,6 +743,10 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev) goto err2; } + ret = clk_prepare(p->clk); + if (ret < 0) + goto err3; + if (res2 && (resource_size(res2) == 4)) { /* assume both CMSTR and CMCSR to be 32-bit */ p->read_control = sh_cmt_read32; @@ -773,19 +783,21 @@ static int sh_cmt_setup(struct sh_cmt_priv *p, struct platform_device *pdev) cfg->clocksource_rating); if (ret) { dev_err(&p->pdev->dev, "registration failed\n"); - goto err3; + goto err4; } p->cs_enabled = false; ret = setup_irq(irq, &p->irqaction); if (ret) { dev_err(&p->pdev->dev, "failed to request irq %d\n", irq); - goto err3; + goto err4; } platform_set_drvdata(pdev, p); return 0; +err4: + clk_unprepare(p->clk); err3: clk_put(p->clk); err2: