PM / OPP: Expose _of_get_opp_desc_node as dev_pm_opp API

Rename _of_get_opp_desc_node to dev_pm_opp_of_get_opp_desc_node and add it
to include/linux/pm_opp.h to allow other drivers, such as platform OPP
and cpufreq drivers, to make use of it.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2 files changed, 11 insertions, 4 deletions

diff --git a/drivers/base/power/opp/of.c b/drivers/base/power/opp/of.c
index 083b79fa0c62..779428676f63 100644
--- a/drivers/base/power/opp/of.c
+++ b/drivers/base/power/opp/of.c
@@ -243,7 +243,7 @@ void dev_pm_opp_of_remove_table(struct device *dev)
 EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
 
 /* Returns opp descriptor node for a device, caller must do of_node_put() */
-static struct device_node *_of_get_opp_desc_node(struct device *dev)
+struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
 {
         /*
          * There should be only ONE phandle present in "operating-points-v2"
@@ -252,6 +252,7 @@ static struct device_node *_of_get_opp_desc_node(struct device *dev)
 
         return of_parse_phandle(dev->of_node, "operating-points-v2", 0);
 }
+EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
 
 /**
  * _opp_add_static_v2() - Allocate static OPPs (As per 'v2' DT bindings)
@@ -478,7 +479,7 @@ int dev_pm_opp_of_add_table(struct device *dev)
          * OPPs have two version of bindings now. The older one is deprecated,
          * try for the new binding first.
          */
-        opp_np = _of_get_opp_desc_node(dev);
+        opp_np = dev_pm_opp_of_get_opp_desc_node(dev);
         if (!opp_np) {
                 /*
                  * Try old-deprecated bindings for backward compatibility with
@@ -570,7 +571,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
         int cpu, ret = 0;
 
         /* Get OPP descriptor node */
-        np = _of_get_opp_desc_node(cpu_dev);
+        np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
         if (!np) {
                 dev_dbg(cpu_dev, "%s: Couldn't find opp node.\n", __func__);
                 return -ENOENT;
@@ -595,7 +596,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
                 }
 
                 /* Get OPP descriptor node */
-                tmp_np = _of_get_opp_desc_node(tcpu_dev);
+                tmp_np = dev_pm_opp_of_get_opp_desc_node(tcpu_dev);
                 if (!tmp_np) {
                         dev_err(tcpu_dev, "%s: Couldn't find opp node.\n",
                                 __func__);
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 731d548657aa..a6685b3dde26 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -288,6 +288,7 @@ void dev_pm_opp_of_remove_table(struct device *dev);
 int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
 void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
 int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
+struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
 #else
 static inline int dev_pm_opp_of_add_table(struct device *dev)
 {
@@ -311,6 +312,11 @@ static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct
 {
         return -ENOTSUPP;
 }
+
+static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
+{
+        return NULL;
+}
 #endif
 
 #endif          /* __LINUX_OPP_H__ */