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PM / Domains: Split device PM domain data into base and need_restore 

The struct pm_domain_data data type is defined in such a way that
adding new fields specific to the generic PM domains code will
require include/linux/pm.h to be modified.  As a result, data types
used only by the generic PM domains code will be defined in two
headers, although they all should be defined in pm_domain.h and
pm.h will need to include more headers, which won't be very nice.

For this reason change the definition of struct pm_subsys_data
so that its domain_data member is a pointer, which will allow
struct pm_domain_data to be subclassed by various PM domains
implementations.  Remove the need_restore member from
struct pm_domain_data and make the generic PM domains code
subclass it by adding the need_restore member to the new data type.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Rafael J. Wysocki 2011-09-26 20:22:02 +02:00
parent 0d41da2e31
commit cd0ea672f5
3 changed files with 30 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/base/power/domain.c
View File

@ -188,11 +188,12 @@ static int __pm_genpd_save_device(struct pm_domain_data *pdd,
struct generic_pm_domain *genpd)
__releases(&genpd->lock) __acquires(&genpd->lock)
{
struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd);
struct device *dev = pdd->dev;
struct device_driver *drv = dev->driver;
int ret = 0;
if (pdd->need_restore)
if (gpd_data->need_restore)
return 0;
mutex_unlock(&genpd->lock);
@ -210,7 +211,7 @@ static int __pm_genpd_save_device(struct pm_domain_data *pdd,
mutex_lock(&genpd->lock);
if (!ret)
pdd->need_restore = true;
gpd_data->need_restore = true;
return ret;
}
@ -224,10 +225,11 @@ static void __pm_genpd_restore_device(struct pm_domain_data *pdd,
struct generic_pm_domain *genpd)
__releases(&genpd->lock) __acquires(&genpd->lock)
{
struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd);
struct device *dev = pdd->dev;
struct device_driver *drv = dev->driver;
if (!pdd->need_restore)
if (!gpd_data->need_restore)
return;
mutex_unlock(&genpd->lock);
@ -244,7 +246,7 @@ static void __pm_genpd_restore_device(struct pm_domain_data *pdd,
mutex_lock(&genpd->lock);
pdd->need_restore = false;
gpd_data->need_restore = false;
}
/**
@ -493,7 +495,7 @@ static int pm_genpd_runtime_resume(struct device *dev)
mutex_lock(&genpd->lock);
}
finish_wait(&genpd->status_wait_queue, &wait);
__pm_genpd_restore_device(&dev->power.subsys_data->domain_data, genpd);
__pm_genpd_restore_device(dev->power.subsys_data->domain_data, genpd);
genpd->resume_count--;
genpd_set_active(genpd);
wake_up_all(&genpd->status_wait_queue);
@ -1080,6 +1082,7 @@ static void pm_genpd_complete(struct device *dev)
*/
int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev)
{
struct generic_pm_domain_data *gpd_data;
struct pm_domain_data *pdd;
int ret = 0;
@ -1106,14 +1109,20 @@ int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev)
goto out;
}
gpd_data = kzalloc(sizeof(*gpd_data), GFP_KERNEL);
if (!gpd_data) {
ret = -ENOMEM;
goto out;
}
genpd->device_count++;
dev->pm_domain = &genpd->domain;
dev_pm_get_subsys_data(dev);
pdd = &dev->power.subsys_data->domain_data;
pdd->dev = dev;
pdd->need_restore = false;
list_add_tail(&pdd->list_node, &genpd->dev_list);
dev->power.subsys_data->domain_data = &gpd_data->base;
gpd_data->base.dev = dev;
gpd_data->need_restore = false;
list_add_tail(&gpd_data->base.list_node, &genpd->dev_list);
out:
genpd_release_lock(genpd);
@ -1152,6 +1161,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
pdd->dev = NULL;
dev_pm_put_subsys_data(dev);
dev->pm_domain = NULL;
kfree(to_gpd_data(pdd));
genpd->device_count--;

3
include/linux/pm.h
View File

@ -424,7 +424,6 @@ struct wakeup_source;
struct pm_domain_data {
struct list_head list_node;
struct device *dev;
bool need_restore;
};
struct pm_subsys_data {
@ -434,7 +433,7 @@ struct pm_subsys_data {
struct list_head clock_list;
#endif
#ifdef CONFIG_PM_GENERIC_DOMAINS
struct pm_domain_data domain_data;
struct pm_domain_data *domain_data;
#endif
};

10
include/linux/pm_domain.h
View File

@ -62,6 +62,16 @@ struct gpd_link {
struct list_head slave_node;
};
struct generic_pm_domain_data {
struct pm_domain_data base;
bool need_restore;
};
static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
{
return container_of(pdd, struct generic_pm_domain_data, base);
}
#ifdef CONFIG_PM_GENERIC_DOMAINS
extern int pm_genpd_add_device(struct generic_pm_domain *genpd,
struct device *dev);