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Date: Tue, 16 Sep 2014 20:27:06 +0200 From: Ulf Hansson <ulf.hansson@...aro.org> To: Krzysztof Kozlowski <k.kozlowski@...sung.com> Cc: Russell King <linux@....linux.org.uk>, Dan Williams <dan.j.williams@...el.com>, Vinod Koul <vinod.koul@...el.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, dmaengine@...r.kernel.org, Grant Likely <grant.likely@...aro.org>, Lars-Peter Clausen <lars@...afoo.de>, Michal Simek <michal.simek@...inx.com>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>, Randy Dunlap <rdunlap@...radead.org>, Alan Stern <stern@...land.harvard.edu>, "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>, "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>, Kyungmin Park <kyungmin.park@...sung.com>, Marek Szyprowski <m.szyprowski@...sung.com>, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com> Subject: Re: [PATCH v5 1/4] PM / Runtime: Add getter for quering the IRQ safe option On 16 September 2014 14:59, Krzysztof Kozlowski <k.kozlowski@...sung.com> wrote: > 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 <k.kozlowski@...sung.com> Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org> Kind regards Uffe > --- > 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) {} > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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