From patchwork Mon Oct 20 09:04:44 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 5103401 Return-Path: X-Original-To: patchwork-dmaengine@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 E5DB9C11AC for ; Mon, 20 Oct 2014 09:05:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EF36020154 for ; Mon, 20 Oct 2014 09:05:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B1A120179 for ; Mon, 20 Oct 2014 09:05:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753307AbaJTJF2 (ORCPT ); Mon, 20 Oct 2014 05:05:28 -0400 Received: from mailout3.w1.samsung.com ([210.118.77.13]:43755 "EHLO mailout3.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753264AbaJTJFW (ORCPT ); Mon, 20 Oct 2014 05:05:22 -0400 Received: from eucpsbgm1.samsung.com (unknown [203.254.199.244]) by mailout3.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NDQ00B08K1NRAA0@mailout3.w1.samsung.com>; Mon, 20 Oct 2014 10:08:11 +0100 (BST) X-AuditID: cbfec7f4-b7f6c6d00000120b-21-5444d04ff73a Received: from eusync4.samsung.com ( [203.254.199.214]) by eucpsbgm1.samsung.com (EUCPMTA) with SMTP id E9.1E.04619.F40D4445; Mon, 20 Oct 2014 10:05:19 +0100 (BST) Received: from AMDC1943.digital.local ([106.116.151.171]) by eusync4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NDQ008ZEJWR1P90@eusync4.samsung.com>; Mon, 20 Oct 2014 10:05:19 +0100 (BST) From: Krzysztof Kozlowski To: "Rafael J. Wysocki" , Len Brown , Pavel Machek , Jonathan Corbet , Russell King , Dan Williams , Vinod Koul , Ulf Hansson , Alan Stern , Krzysztof Kozlowski , linux-pm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Lars-Peter Clausen , Michal Simek Cc: Kyungmin Park , Marek Szyprowski , Bartlomiej Zolnierkiewicz Subject: [PATCH v8 1/5] PM / Runtime: Add getter for querying the IRQ safe option Date: Mon, 20 Oct 2014 11:04:44 +0200 Message-id: <1413795888-18559-2-git-send-email-k.kozlowski@samsung.com> X-Mailer: git-send-email 1.9.1 In-reply-to: <1413795888-18559-1-git-send-email-k.kozlowski@samsung.com> References: <1413795888-18559-1-git-send-email-k.kozlowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrHLMWRmVeSWpSXmKPExsVy+t/xa7r+F1xCDHatV7HYOGM9q8WTA+2M FtOnXmC0WD31L6vF6xeGFmeb3rBbLJk8n9Vi1pS9TBYL25awWFzeNYfN4nPvEUaL25d5LdYe uctu8e5lhMXdU0fZLM6cvsRqMeH3BTaL42vDLV727WdxEPZoae5h81i85yWTx51re4Csvsms HkveHGL12HK1ncVj9t0fjB59W1YxeqxY/Z3d4/MmOY+9n3+zBHBHcdmkpOZklqUW6dslcGVs /7CQraBVqOL9lS1MDYy9/F2MnBwSAiYS1z83M0PYYhIX7q1n62Lk4hASWMoocavxJTOE08ck 8ffIUVaQKjYBY4nNy5eAVYkIHGeRWNxzAcxhFpjCKNE8aSkTSJWwQLDEjZMH2EBsFgFViS/z DjOC2LwC7hIv/6xghNgnJ3Hy2GSwqZwCHhLTWx6DxYWAaroXrmKawMi7gJFhFaNoamlyQXFS eq6hXnFibnFpXrpecn7uJkZIHHzZwbj4mNUhRgEORiUeXgFLlxAh1sSy4srcQ4wSHMxKIrxM R4FCvCmJlVWpRfnxRaU5qcWHGJk4OKUaGGeeYt+tNsMocpFW5uVPVduFtpa3+C7d+9L67VLB 3lJVweNl8dEeU7e8PLrGqD+auZO7X+nuP5lKc5uIf51r+dcUNAXd/+4wve+zOsPaG1LRSl+e JeVeZmlMzKmxe9892WfT9VfvjSb0bMk8tfl2/FTNL0E9p/a52SllHan5En9E732b6r2b+5RY ijMSDbWYi4oTAVT7N45hAgAA Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Add a simple getter pm_runtime_is_irq_safe() for querying whether runtime PM IRQ safe was set or not. Various bus drivers implementing runtime PM may use choose to suspend differently based on IRQ safeness status of child driver (e.g. do not unprepare the clock if IRQ safe is not set). Signed-off-by: Krzysztof Kozlowski Reviewed-by: Ulf Hansson --- Documentation/power/runtime_pm.txt | 4 ++++ include/linux/pm_runtime.h | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index f32ce5419573..397b81593142 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -468,6 +468,10 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h: - set the power.irq_safe flag for the device, causing the runtime-PM callbacks to be invoked with interrupts off + bool pm_runtime_is_irq_safe(struct device *dev); + - return true if power.irq_safe flag was set for the device, causing + the runtime-PM callbacks to be invoked with interrupts off + void pm_runtime_mark_last_busy(struct device *dev); - set the power.last_busy field to the current time diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index 367f49b9a1c9..44d74f0f182e 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -128,6 +128,11 @@ static inline void pm_runtime_mark_last_busy(struct device *dev) ACCESS_ONCE(dev->power.last_busy) = jiffies; } +static inline bool pm_runtime_is_irq_safe(struct device *dev) +{ + return dev->power.irq_safe; +} + #else /* !CONFIG_PM_RUNTIME */ static inline int __pm_runtime_idle(struct device *dev, int rpmflags) @@ -167,6 +172,7 @@ static inline bool pm_runtime_enabled(struct device *dev) { return false; } static inline void pm_runtime_no_callbacks(struct device *dev) {} static inline void pm_runtime_irq_safe(struct device *dev) {} +static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; } static inline void pm_runtime_mark_last_busy(struct device *dev) {}