From fbadc58dd3a52c330c8f3926aa93011bf9d91fa0 Mon Sep 17 00:00:00 2001
From: ShuoX Liu <shuox.liu@intel.com>
Date: Wed, 23 Jan 2013 21:49:37 +0100
Subject: [PATCH] PM / Runtime: Add new helper function: pm_runtime_active()
This boolean function simply returns whether or not the runtime
status of the device is 'active'. The typical scenario is driver
calls pm_runtime_get firstly, then check pm_runtime_active in
atomic environment.
Also add entry to Documentation/power/runtime.txt
Signed-off-by: Yanmin Zhang <yanmin.zhang@intel.com>
Signed-off-by: ShuoX Liu <shuox.liu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
Documentation/power/runtime_pm.txt | 4 ++++
include/linux/pm_runtime.h | 7 +++++++
2 files changed, 11 insertions(+)
diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt
index 03591a750f99e..6c9f5d9aa115d 100644
--- a/Documentation/power/runtime_pm.txt
+++ b/Documentation/power/runtime_pm.txt
@@ -426,6 +426,10 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h:
'power.runtime_error' is set or 'power.disable_depth' is greater than
zero)
+ bool pm_runtime_active(struct device *dev);
+ - return true if the device's runtime PM status is 'active' or its
+ 'power.disable_depth' field is not equal to zero, or false otherwise
+
bool pm_runtime_suspended(struct device *dev);
- return true if the device's runtime PM status is 'suspended' and its
'power.disable_depth' field is equal to zero, or false otherwise
diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h
index f271860c78d54..c785c215abfc5 100644
--- a/include/linux/pm_runtime.h
+++ b/include/linux/pm_runtime.h
@@ -80,6 +80,12 @@ static inline bool pm_runtime_suspended(struct device *dev)
&& !dev->power.disable_depth;
}
+static inline bool pm_runtime_active(struct device *dev)
+{
+ return dev->power.runtime_status == RPM_ACTIVE
+ || dev->power.disable_depth;
+}
+
static inline bool pm_runtime_status_suspended(struct device *dev)
{
return dev->power.runtime_status == RPM_SUSPENDED;
@@ -132,6 +138,7 @@ static inline void pm_runtime_put_noidle(struct device *dev) {}
static inline bool device_run_wake(struct device *dev) { return false; }
static inline void device_set_run_wake(struct device *dev, bool enable) {}
static inline bool pm_runtime_suspended(struct device *dev) { return false; }
+static inline bool pm_runtime_active(struct device *dev) { return true; }
static inline bool pm_runtime_status_suspended(struct device *dev) { return false; }
static inline bool pm_runtime_enabled(struct device *dev) { return false; }
--
2.30.2