From patchwork Mon Sep 10 15:23:43 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Hunter, Jon" X-Patchwork-Id: 1432581 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 38864DF28C for ; Mon, 10 Sep 2012 15:28:03 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TB5qr-0006a4-UI; Mon, 10 Sep 2012 15:24:42 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TB5qA-0006Mh-Uq for linux-arm-kernel@lists.infradead.org; Mon, 10 Sep 2012 15:24:01 +0000 Received: from dlelxv30.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id q8AFNstW027601; Mon, 10 Sep 2012 10:23:54 -0500 Received: from DLEE74.ent.ti.com (dlee74.ent.ti.com [157.170.170.8]) by dlelxv30.itg.ti.com (8.13.8/8.13.8) with ESMTP id q8AFNst4005831; Mon, 10 Sep 2012 10:23:54 -0500 Received: from dlelxv24.itg.ti.com (172.17.1.199) by DLEE74.ent.ti.com (157.170.170.8) with Microsoft SMTP Server id 14.1.323.3; Mon, 10 Sep 2012 10:23:53 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlelxv24.itg.ti.com (8.13.8/8.13.8) with ESMTP id q8AFNsV8001971; Mon, 10 Sep 2012 10:23:54 -0500 Received: from localhost (h56-53.vpn.ti.com [172.24.56.53]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id q8AFNrr00993; Mon, 10 Sep 2012 10:23:53 -0500 (CDT) From: Jon Hunter To: Tony Lindgren Subject: [PATCH V3 5/8] ARM: OMAP2+: PMU: Add runtime PM support Date: Mon, 10 Sep 2012 10:23:43 -0500 Message-ID: <1347290626-21164-6-git-send-email-jon-hunter@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1347290626-21164-1-git-send-email-jon-hunter@ti.com> References: <1347290626-21164-1-git-send-email-jon-hunter@ti.com> MIME-Version: 1.0 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -7.3 (-------) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-7.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.152 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Kevin Hilman , Paul Walmsley , Benoit Cousson , Ming Lei , Will Deacon , Jon Hunter , linux-omap , linux-arm X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The original implementation of this patch was done by Ming Lei for PMU on OMAP4 [1]. Since then the PM runtime calls have been moved into the ARM PMU code and this greatly simplifies the changes. The another differnce since the original version, is that it is no longer necessary to call pm_runtime_get/put during the PMU initialisation was we are no longer accessing the hardware at this stage. By adding runtime PM support, we can ensure that the appropriate power and clock domains are kept on while PMU is being used. [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-November/074153.html Cc: Ming Lei Cc: Will Deacon Cc: Benoit Cousson Cc: Paul Walmsley Cc: Kevin Hilman Signed-off-by: Jon Hunter --- arch/arm/mach-omap2/pmu.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-omap2/pmu.c b/arch/arm/mach-omap2/pmu.c index 7c137be..03007b6 100644 --- a/arch/arm/mach-omap2/pmu.c +++ b/arch/arm/mach-omap2/pmu.c @@ -13,6 +13,8 @@ * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ +#include + #include #include @@ -54,7 +56,12 @@ static int __init omap2_init_pmu(unsigned oh_num, char *oh_names[]) WARN(IS_ERR(omap_pmu_dev), "Can't build omap_device for %s.\n", dev_name); - return IS_ERR(omap_pmu_dev) ? PTR_ERR(omap_pmu_dev) : 0; + if (IS_ERR(omap_pmu_dev)) + return PTR_ERR(omap_pmu_dev); + + pm_runtime_enable(&omap_pmu_dev->dev); + + return 0; } static int __init omap_init_pmu(void)