From patchwork Mon Sep 22 09:46:26 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 4946711 Return-Path: X-Original-To: patchwork-dmaengine@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 C02FF9F32F for ; Mon, 22 Sep 2014 09:48:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7CC7A201FA for ; Mon, 22 Sep 2014 09:48:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 260D82020F for ; Mon, 22 Sep 2014 09:48:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751335AbaIVJq7 (ORCPT ); Mon, 22 Sep 2014 05:46:59 -0400 Received: from mailout3.w1.samsung.com ([210.118.77.13]:53805 "EHLO mailout3.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751070AbaIVJq4 (ORCPT ); Mon, 22 Sep 2014 05:46:56 -0400 Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) 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 <0NCA0072IRAXTB90@mailout3.w1.samsung.com>; Mon, 22 Sep 2014 10:49:45 +0100 (BST) X-AuditID: cbfec7f5-b7f776d000003e54-92-541ff00e7b13 Received: from eusync3.samsung.com ( [203.254.199.213]) by eucpsbgm2.samsung.com (EUCPMTA) with SMTP id E1.69.15956.E00FF145; Mon, 22 Sep 2014 10:46:54 +0100 (BST) Received: from AMDC1943.digital.local ([106.116.151.171]) by eusync3.samsung.com (Oracle Communications Messaging Server 7u4-23.01(7.0.4.23.0) 64bit (built Aug 10 2011)) with ESMTPA id <0NCA006NUR61YU10@eusync3.samsung.com>; Mon, 22 Sep 2014 10:46:54 +0100 (BST) From: Krzysztof Kozlowski To: Russell King , Dan Williams , Vinod Koul , linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Ulf Hansson , Grant Likely , Lars-Peter Clausen , Michal Simek , "Rafael J. Wysocki" , Len Brown , Pavel Machek , Randy Dunlap , Alan Stern , linux-doc@vger.kernel.org, linux-pm@vger.kernel.org Cc: Kyungmin Park , Marek Szyprowski , Bartlomiej Zolnierkiewicz , Krzysztof Kozlowski Subject: [PATCH v6 1/4] PM / Runtime: Add getter for quering the IRQ safe option Date: Mon, 22 Sep 2014 11:46:26 +0200 Message-id: <1411379189-3017-2-git-send-email-k.kozlowski@samsung.com> X-Mailer: git-send-email 1.9.1 In-reply-to: <1411379189-3017-1-git-send-email-k.kozlowski@samsung.com> References: <1411379189-3017-1-git-send-email-k.kozlowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrHLMWRmVeSWpSXmKPExsVy+t/xq7p8H+RDDPatY7fYOGM9q8X0qRcY LVZP/ctqceDPDkaL1y8MLc42vWG3WDJ5PqvFrCl7mSwWti1hsbi8aw6bxefeI4wWty/zWqw9 cpfd4t3LCIu7p46yWby9M53F4szpS6wWE35fYLM4vjbc4mXffhYHEY+W5h42j80rtDwW73nJ 5HHn2h42jyVvDrF6bLnazuIx++4PRo++LasYPVas/s7u8XmTnMfez79ZArijuGxSUnMyy1KL 9O0SuDKe3rrAVtAiVDHjlmkDYw9/FyMHh4SAicST86xdjJxAppjEhXvr2boYuTiEBJYySkw8 f5oJwuljknj2uIkdpIpNwFhi8/IlYFUiAkdYJJ7dewLmMAscZZSY3vuWCaRKWCBAYmfzVzaQ FSwCqhJPd0mAmLwCbhJHf4lBbJOTOHlsMthmTgF3if3PWsDmCwGVHDk0m2kCI+8CRoZVjKKp pckFxUnpuUZ6xYm5xaV56XrJ+bmbGCFx8HUH49JjVocYBTgYlXh4f7TIhwixJpYVV+YeYpTg YFYS4X36HCjEm5JYWZValB9fVJqTWnyIkYmDU6qBcWXM97PdRonzOWriepLiPx4yjo+WUtvK kV0UYb6CLa1bt5dj3unmsvorbhOzAjkrv5rms7GynbthsebbzQodo/ZU2WkJGj+EnaZF/rFf +IS1Vsc29oOKUkKAwa41UjnHnxczcv87MNnkGsfF4+IJB2aFNq9P/e614Xj21hph4yu7Fgix OSUrsRRnJBpqMRcVJwIAIYlLO2ECAAA= Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org X-Spam-Status: No, score=-7.9 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 quering 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) {}