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Commit 3fb1581e authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Russell King
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ARM: 8199/1: PM / Runtime: Add getter for querying the IRQ safe option v12 



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: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Acked-by: default avatarRafael J. Wysocki <rjw@rjwysocki.net>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent f114040e

Documentation/power/runtime_pm.txt

+4 −0
Original line number Diff line number Diff line
@@ -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

include/linux/pm_runtime.h

+6 −0
Original line number Diff line number Diff line
@@ -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) {}