From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752934AbaKLOco (ORCPT ); Wed, 12 Nov 2014 09:32:44 -0500 Received: from mailout2.w1.samsung.com ([210.118.77.12]:22124 "EHLO mailout2.w1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752548AbaKLOch (ORCPT ); Wed, 12 Nov 2014 09:32:37 -0500 X-AuditID: cbfec7f4-b7f6c6d00000120b-99-54636f826f8e From: Krzysztof Kozlowski To: "Rafael J. Wysocki" , Len Brown , Pavel Machek , Russell King , Dan Williams , Vinod Koul , Ulf Hansson , Alan Stern , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org Cc: Kevin Hilman , Laurent Pinchart , Kyungmin Park , Marek Szyprowski , Bartlomiej Zolnierkiewicz , Krzysztof Kozlowski Subject: [PATCH v11 1/6] PM / Runtime: Add getter for querying the IRQ safe option Date: Wed, 12 Nov 2014 15:32:23 +0100 Message-id: <1415802748-30530-2-git-send-email-k.kozlowski@samsung.com> X-Mailer: git-send-email 1.9.1 In-reply-to: <1415802748-30530-1-git-send-email-k.kozlowski@samsung.com> References: <1415802748-30530-1-git-send-email-k.kozlowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrPLMWRmVeSWpSXmKPExsVy+t/xq7pN+ckhBg8Wc1lsnLGe1WL61AuM Fqun/mW1eP3C0OLp5sdMFmeb3rBbdE5cwm4xa8peJovLu+awWXzuPcJocfsyr8XaI3fZLe6e Ospmceb0JVaLCb8vsFkcXxtu8bJvP4uDoEdLcw+bx+yOmawei/e8ZPLYtKqTzePOtT1sHluu trN4zL77g9Gjb8sqRo8Vq7+ze3zeJBfAFcVlk5Kak1mWWqRvl8CVsfv8d7aCVqGKzee62BoY e/m7GDk5JARMJA7//ckIYYtJXLi3nq2LkYtDSGApo8SlO/MZIZw+Jok1pzeygFSxCRhLbF6+ BKxKRKCdWaJv3VQ2kASzwCImiaapiiC2sECIxN+fH5lAbBYBVYl1HbPBVvAKuEu0Nd6CWicn cfLYZFYQm1PAQ+LLtr9gc4SAas5cPsgygZF3ASPDKkbR1NLkguKk9FxDveLE3OLSvHS95Pzc TYyQQP+yg3HxMatDjAIcjEo8vBU8ySFCrIllxZW5hxglOJiVRHh35QCFeFMSK6tSi/Lji0pz UosPMTJxcEo1MPY5pubsf/xyvVDVv0nv43Pe1Jsdj55ue2P1NqZGwRsGPXekej+vUioMf3/4 WvXhdYdmLOicVWm96PnTBSHczyXfmPJetHv0qGIXZ+Hzj5JNMyIbSv5q6j2SCryh15fg3xr9 aFbujd/lm2TE2tc28vs6T1m/MXXbxbqpCTFf98Ukdbw4f0bM7oASS3FGoqEWc1FxIgDkwOqT UgIAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 0e5ea26b255a..44fe1d28a163 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) {} -- 1.9.1