We already have the of_genpd_add_subdomain() helper, but no corresponding
of_genpd_remove_subdomain(), so let's add it. Subsequent changes starts to
make use of it.
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
Changes in v5:
- New patch.
---
drivers/base/power/domain.c | 38 +++++++++++++++++++++++++++++++++++++
include/linux/pm_domain.h | 8 ++++++++
2 files changed, 46 insertions(+)
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
@@ -2302,6 +2302,44 @@ int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
}
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)
{
--
2.17.1
