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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-07-13 12:31:52 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-07-13 12:31:52 +0200 |
| commit | 5125bbf3880755419eff68672623cde49c4f31e8 (patch) | |
| tree | 50c4bfa1745e6d30ca16652a4d2ea848c568eb31 | |
| parent | 56375fd420f851944960bd53dbb08d674f4d9406 (diff) | |
| download | op-kernel-dev-5125bbf3880755419eff68672623cde49c4f31e8.zip op-kernel-dev-5125bbf3880755419eff68672623cde49c4f31e8.tar.gz | |
PM / Domains: Introduce function to power off all unused PM domains
Add a new function pm_genpd_poweroff_unused() queuing up the
execution of pm_genpd_poweroff() for every initialized generic PM
domain. Calling it will cause every generic PM domain without
devices in use to be powered off.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
| -rw-r--r-- | drivers/base/power/domain.c | 21 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 3 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index c3e4e29..c2c537d 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -16,6 +16,9 @@ #include <linux/sched.h> #include <linux/suspend.h> +static LIST_HEAD(gpd_list); +static DEFINE_MUTEX(gpd_list_lock); + #ifdef CONFIG_PM static struct generic_pm_domain *dev_to_genpd(struct device *dev) @@ -1241,4 +1244,22 @@ void pm_genpd_init(struct generic_pm_domain *genpd, genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; genpd->domain.ops.restore = pm_genpd_restore; genpd->domain.ops.complete = pm_genpd_complete; + mutex_lock(&gpd_list_lock); + list_add(&genpd->gpd_list_node, &gpd_list); + mutex_unlock(&gpd_list_lock); +} + +/** + * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use. + */ +void pm_genpd_poweroff_unused(void) +{ + struct generic_pm_domain *genpd; + + mutex_lock(&gpd_list_lock); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) + genpd_queue_power_off_work(genpd); + + mutex_unlock(&gpd_list_lock); } diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index feb80af..3e4f3d3 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -24,6 +24,7 @@ struct dev_power_governor { struct generic_pm_domain { struct dev_pm_domain domain; /* PM domain operations */ + struct list_head gpd_list_node; /* Node in the global PM domains list */ struct list_head sd_node; /* Node in the parent's subdomain list */ struct generic_pm_domain *parent; /* Parent PM domain */ struct list_head sd_list; /* List of dubdomains */ @@ -71,6 +72,7 @@ extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, extern void pm_genpd_init(struct generic_pm_domain *genpd, struct dev_power_governor *gov, bool is_off); extern int pm_genpd_poweron(struct generic_pm_domain *genpd); +extern void pm_genpd_poweroff_unused(void); #else static inline int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev) @@ -98,6 +100,7 @@ static inline int pm_genpd_poweron(struct generic_pm_domain *genpd) { return -ENOSYS; } +static inline void pm_genpd_poweroff_unused(void) {} #endif #endif /* _LINUX_PM_DOMAIN_H */ |
