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>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index feb80af4cc1b..3e4f3d308f5e 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 */