diff options
| -rw-r--r-- | drivers/base/power/domain.c | 38 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 8 |
2 files changed, 46 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 8e5725b11ee8..959d6d5eb000 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2303,6 +2303,44 @@ out: EXPORT_SYMBOL_GPL(of_genpd_add_subdomain); /** + * of_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain. + * @parent_spec: OF phandle args to use for parent PM domain look-up + * @subdomain_spec: OF phandle args to use for subdomain look-up + * + * Looks-up a parent PM domain and subdomain based upon phandle args + * provided and removes the subdomain from the parent PM domain. Returns a + * negative error code on failure. + */ +int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec) +{ + struct generic_pm_domain *parent, *subdomain; + int ret; + + mutex_lock(&gpd_list_lock); + + parent = genpd_get_from_provider(parent_spec); + if (IS_ERR(parent)) { + ret = PTR_ERR(parent); + goto out; + } + + subdomain = genpd_get_from_provider(subdomain_spec); + if (IS_ERR(subdomain)) { + ret = PTR_ERR(subdomain); + goto out; + } + + ret = pm_genpd_remove_subdomain(parent, subdomain); + +out: + mutex_unlock(&gpd_list_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(of_genpd_remove_subdomain); + +/** * of_genpd_remove_last - Remove the last PM domain registered for a provider * @provider: Pointer to device structure associated with provider * diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 5a31c711b896..9ec78ee53652 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -284,6 +284,8 @@ void of_genpd_del_provider(struct device_node *np); int of_genpd_add_device(struct of_phandle_args *args, struct device *dev); int of_genpd_add_subdomain(struct of_phandle_args *parent_spec, struct of_phandle_args *subdomain_spec); +int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec); struct generic_pm_domain *of_genpd_remove_last(struct device_node *np); int of_genpd_parse_idle_states(struct device_node *dn, struct genpd_power_state **states, int *n); @@ -322,6 +324,12 @@ static inline int of_genpd_add_subdomain(struct of_phandle_args *parent_spec, return -ENODEV; } +static inline int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec) +{ + return -ENODEV; +} + static inline int of_genpd_parse_idle_states(struct device_node *dn, struct genpd_power_state **states, int *n) { |