[PATCH v4 6/8] pmdomain: Make genpd_get_from_provider() public

[Geert Uytterhoeven]

Unlike the corresponding function in the clock subsystem[1],
genpd_get_from_provider() is private, and thus cannot be used by PM
Domain drivers.

Make it public, so the R-Car X5H Module Controller driver can call it.
Add an "of_"-prefix for consistency with public genpd function naming.

[1] of_clk_get_from_provider().

Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
v4:
  - Improve patch description,

v3:
  - Add "of_" prefix,

v2:
  - No changes.
---
 drivers/pmdomain/core.c   | 22 +++++++++++-----------
 include/linux/pm_domain.h |  7 +++++++
 2 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 88c886814a5b9da3..4136368456d994f7 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -3008,7 +3008,7 @@ void of_genpd_del_provider(struct device_node *np)
 EXPORT_SYMBOL_GPL(of_genpd_del_provider);
 
 /**
- * genpd_get_from_provider() - Look-up PM domain
+ * of_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
@@ -3018,8 +3018,7 @@ EXPORT_SYMBOL_GPL(of_genpd_del_provider);
  * Returns a valid pointer to struct generic_pm_domain on success or ERR_PTR()
  * on failure.
  */
-static struct generic_pm_domain *genpd_get_from_provider(
-					const struct of_phandle_args *genpdspec)
+struct generic_pm_domain *of_genpd_get_from_provider(const struct of_phandle_args *genpdspec)
 {
 	struct generic_pm_domain *genpd = ERR_PTR(-EPROBE_DEFER);
 	struct of_genpd_provider *provider;
@@ -3041,6 +3040,7 @@ static struct generic_pm_domain *genpd_get_from_provider(
 
 	return genpd;
 }
+EXPORT_SYMBOL_GPL(of_genpd_get_from_provider);
 
 /**
  * of_genpd_add_child_ids() - Parse power-domains-child-ids property
@@ -3113,7 +3113,7 @@ int of_genpd_add_child_ids(struct device_node *np,
 			goto err_unwind;
 
 		/* Get the parent domain */
-		parent_genpd = genpd_get_from_provider(&parent_args);
+		parent_genpd = of_genpd_get_from_provider(&parent_args);
 		of_node_put(parent_args.np);
 		if (IS_ERR(parent_genpd)) {
 			pr_err("Failed to get parent domain for %pOF: %ld\n",
@@ -3196,7 +3196,7 @@ int of_genpd_remove_child_ids(struct device_node *np,
 		if (ret)
 			continue;
 
-		parent_genpd = genpd_get_from_provider(&parent_args);
+		parent_genpd = of_genpd_get_from_provider(&parent_args);
 		of_node_put(parent_args.np);
 		if (IS_ERR(parent_genpd))
 			continue;
@@ -3227,7 +3227,7 @@ int of_genpd_add_device(const struct of_phandle_args *genpdspec, struct device *
 
 	mutex_lock(&gpd_list_lock);
 
-	genpd = genpd_get_from_provider(genpdspec);
+	genpd = of_genpd_get_from_provider(genpdspec);
 	if (IS_ERR(genpd)) {
 		ret = PTR_ERR(genpd);
 		goto out;
@@ -3259,13 +3259,13 @@ int of_genpd_add_subdomain(const struct of_phandle_args *parent_spec,
 
 	mutex_lock(&gpd_list_lock);
 
-	parent = genpd_get_from_provider(parent_spec);
+	parent = of_genpd_get_from_provider(parent_spec);
 	if (IS_ERR(parent)) {
 		ret = PTR_ERR(parent);
 		goto out;
 	}
 
-	subdomain = genpd_get_from_provider(subdomain_spec);
+	subdomain = of_genpd_get_from_provider(subdomain_spec);
 	if (IS_ERR(subdomain)) {
 		ret = PTR_ERR(subdomain);
 		goto out;
@@ -3297,13 +3297,13 @@ int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec,
 
 	mutex_lock(&gpd_list_lock);
 
-	parent = genpd_get_from_provider(parent_spec);
+	parent = of_genpd_get_from_provider(parent_spec);
 	if (IS_ERR(parent)) {
 		ret = PTR_ERR(parent);
 		goto out;
 	}
 
-	subdomain = genpd_get_from_provider(subdomain_spec);
+	subdomain = of_genpd_get_from_provider(subdomain_spec);
 	if (IS_ERR(subdomain)) {
 		ret = PTR_ERR(subdomain);
 		goto out;
@@ -3491,7 +3491,7 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev,
 		return ret;
 
 	mutex_lock(&gpd_list_lock);
-	pd = genpd_get_from_provider(&pd_args);
+	pd = of_genpd_get_from_provider(&pd_args);
 	of_node_put(pd_args.np);
 	if (IS_ERR(pd)) {
 		mutex_unlock(&gpd_list_lock);
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 14e0e346c610a9a6..d65ee8b3725c1bcb 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -467,6 +467,7 @@ int of_genpd_add_provider_simple(struct device_node *np,
 int of_genpd_add_provider_onecell(struct device_node *np,
 				  struct genpd_onecell_data *data);
 void of_genpd_del_provider(struct device_node *np);
+struct generic_pm_domain *of_genpd_get_from_provider(const struct of_phandle_args *genpdspec);
 int of_genpd_add_device(const struct of_phandle_args *args, struct device *dev);
 int of_genpd_add_subdomain(const struct of_phandle_args *parent_spec,
 			   const struct of_phandle_args *subdomain_spec);
@@ -501,6 +502,12 @@ static inline int of_genpd_add_provider_onecell(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(
+				const struct of_phandle_args *genpdspec)
+{
+	return ERR_PTR(-ENODEV);
+}
+
 static inline int of_genpd_add_device(const struct of_phandle_args *args,
 				      struct device *dev)
 {
-- 
2.43.0