From: Jean Pihet <j-pihet@xxxxxx>
Add the field wakeup_lat_plist_head in the struct dev_pm_info
and the initialization of the plist in device_pm_init.
This enables the implementation of per-device constraints in
PM QoS.
Signed-off-by: Jean Pihet <j-pihet@xxxxxx>
---
drivers/base/power/main.c | 3 +++
include/linux/pm.h | 2 ++
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index aa632020..b1fd96b 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -96,6 +96,8 @@ void device_pm_add(struct device *dev)
dev_name(dev->parent));
list_add_tail(&dev->power.entry, &dpm_list);
mutex_unlock(&dpm_list_mtx);
+ /* ToDo: call PM QoS to init the per-device wakeup latency constraints */
+ plist_head_init(&dev->power.wakeup_lat_plist_head, &dev->power.lock);
}
/**
@@ -106,6 +108,7 @@ void device_pm_remove(struct device *dev)
{
pr_debug("PM: Removing info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
+ /* ToDo: call PM QoS to de-init the per-device wakeup latency constraints */
complete_all(&dev->power.completion);
mutex_lock(&dpm_list_mtx);
list_del_init(&dev->power.entry);
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 3160648..35fe682 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -22,6 +22,7 @@
#define _LINUX_PM_H
#include <linux/list.h>
+#include <linux/plist.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
@@ -462,6 +463,7 @@ struct dev_pm_info {
unsigned long accounting_timestamp;
void *subsys_data; /* Owned by the subsystem. */
#endif
+ struct plist_head wakeup_lat_plist_head;
};
extern void update_pm_runtime_accounting(struct device *dev);
--
1.7.4.1
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