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-rw-r--r--drivers/base/power/domain.c32
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index ac06d02..cddf818 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1584,7 +1584,8 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
struct gpd_link *link;
int ret = 0;
- if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain))
+ if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain)
+ || genpd == subdomain)
return -EINVAL;
start:
@@ -1631,6 +1632,35 @@ int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
}
/**
+ * pm_genpd_add_subdomain_names - Add a subdomain to an I/O PM domain.
+ * @master_name: Name of the master PM domain to add the subdomain to.
+ * @subdomain_name: Name of the subdomain to be added.
+ */
+int pm_genpd_add_subdomain_names(const char *master_name,
+ const char *subdomain_name)
+{
+ struct generic_pm_domain *master = NULL, *subdomain = NULL, *gpd;
+
+ if (IS_ERR_OR_NULL(master_name) || IS_ERR_OR_NULL(subdomain_name))
+ return -EINVAL;
+
+ mutex_lock(&gpd_list_lock);
+ list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
+ if (!master && !strcmp(gpd->name, master_name))
+ master = gpd;
+
+ if (!subdomain && !strcmp(gpd->name, subdomain_name))
+ subdomain = gpd;
+
+ if (master && subdomain)
+ break;
+ }
+ mutex_unlock(&gpd_list_lock);
+
+ return pm_genpd_add_subdomain(master, subdomain);
+}
+
+/**
* pm_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain.
* @genpd: Master PM domain to remove the subdomain from.
* @subdomain: Subdomain to be removed.
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