PM / Domains: Don't expose generic_pm_domain structure to clients

There should be no need to expose the generic_pm_domain structure to
clients and this eliminates the need to implement reference counting for
any external reference to a PM domain. Therefore, make the functions
pm_genpd_lookup_dev() and of_genpd_get_from_provider() private to the
PM domain core. The functions are renamed in accordance with the naming
conventions for genpd static functions.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index e12d3a8..d8c1eab 100644 (file)
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -45,7 +45,7 @@ static DEFINE_MUTEX(gpd_list_lock);
  * and checks that the PM domain pointer is a real generic PM domain.
  * Any failure results in NULL being returned.
  */
-struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev)
+static struct generic_pm_domain *genpd_lookup_dev(struct device *dev)
 {
        struct generic_pm_domain *genpd = NULL, *gpd;
 
@@ -1119,7 +1119,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
 
        dev_dbg(dev, "%s()\n", __func__);
 
-       if (!genpd || genpd != pm_genpd_lookup_dev(dev))
+       if (!genpd || genpd != genpd_lookup_dev(dev))
                return -EINVAL;
 
        /* The above validation also means we have existing domain_data. */
@@ -1466,7 +1466,7 @@ void of_genpd_del_provider(struct device_node *np)
 EXPORT_SYMBOL_GPL(of_genpd_del_provider);
 
 /**
- * of_genpd_get_from_provider() - Look-up PM domain
+ * genpd_get_from_provider() - Look-up PM domain
  * @genpdspec: OF phandle args to use for look-up
  *
  * Looks for a PM domain provider under the node specified by @genpdspec and if
@@ -1476,7 +1476,7 @@ EXPORT_SYMBOL_GPL(of_genpd_del_provider);
  * Returns a valid pointer to struct generic_pm_domain on success or ERR_PTR()
  * on failure.
  */
-struct generic_pm_domain *of_genpd_get_from_provider(
+static struct generic_pm_domain *genpd_get_from_provider(
                                        struct of_phandle_args *genpdspec)
 {
        struct generic_pm_domain *genpd = ERR_PTR(-ENOENT);
@@ -1499,7 +1499,6 @@ struct generic_pm_domain *of_genpd_get_from_provider(
 
        return genpd;
 }
-EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
 
 /**
  * of_genpd_add_device() - Add a device to an I/O PM domain
@@ -1513,7 +1512,7 @@ int of_genpd_add_device(struct of_phandle_args *genpdspec, struct device *dev)
 {
        struct generic_pm_domain *genpd;
 
-       genpd = of_genpd_get_from_provider(genpdspec);
+       genpd = genpd_get_from_provider(genpdspec);
        if (IS_ERR(genpd))
                return PTR_ERR(genpd);
 
@@ -1535,11 +1534,11 @@ int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
 {
        struct generic_pm_domain *parent, *subdomain;
 
-       parent = of_genpd_get_from_provider(parent_spec);
+       parent = genpd_get_from_provider(parent_spec);
        if (IS_ERR(parent))
                return PTR_ERR(parent);
 
-       subdomain = of_genpd_get_from_provider(subdomain_spec);
+       subdomain = genpd_get_from_provider(subdomain_spec);
        if (IS_ERR(subdomain))
                return PTR_ERR(subdomain);
 
@@ -1561,7 +1560,7 @@ static void genpd_dev_pm_detach(struct device *dev, bool power_off)
        unsigned int i;
        int ret = 0;
 
-       pd = pm_genpd_lookup_dev(dev);
+       pd = genpd_lookup_dev(dev);
        if (!pd)
                return;
 
@@ -1642,7 +1641,7 @@ int genpd_dev_pm_attach(struct device *dev)
                        return -ENOENT;
        }
 
-       pd = of_genpd_get_from_provider(&pd_args);
+       pd = genpd_get_from_provider(&pd_args);
        of_node_put(pd_args.np);
        if (IS_ERR(pd)) {
                dev_dbg(dev, "%s() failed to find PM domain: %ld\n",

diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index e1964a2..bd411e7 100644 (file)
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -116,7 +116,6 @@ static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
        return to_gpd_data(dev->power.subsys_data->domain_data);
 }
 
-extern struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev);
 extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
                                 struct device *dev,
                                 struct gpd_timing_data *td);
@@ -138,10 +137,6 @@ static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
 {
        return ERR_PTR(-ENOSYS);
 }
-static inline struct generic_pm_domain *pm_genpd_lookup_dev(struct device *dev)
-{
-       return NULL;
-}
 static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
                                        struct device *dev,
                                        struct gpd_timing_data *td)
@@ -199,9 +194,6 @@ typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
 int __of_genpd_add_provider(struct device_node *np, genpd_xlate_t xlate,
                        void *data);
 void of_genpd_del_provider(struct device_node *np);
-struct generic_pm_domain *of_genpd_get_from_provider(
-                       struct of_phandle_args *genpdspec);
-
 struct generic_pm_domain *__of_genpd_xlate_simple(
                                        struct of_phandle_args *genpdspec,
                                        void *data);
@@ -222,12 +214,6 @@ static inline int __of_genpd_add_provider(struct device_node *np,
 }
 static inline void of_genpd_del_provider(struct device_node *np) {}
 
-static inline struct generic_pm_domain *of_genpd_get_from_provider(
-                       struct of_phandle_args *genpdspec)
-{
-       return NULL;
-}
-
 #define __of_genpd_xlate_simple                NULL
 #define __of_genpd_xlate_onecell       NULL