[PATCH 2/3] phy: core: Add common helper for get phy phandle by index

[Inochi Amaoto <inochiama@gmail.com>]

Several phy helper use index to get phy phandle of a device node,
add a common function for the future reuse.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 drivers/phy/phy-core.c | 47 +++++++++++++++++++++++++-----------------
 1 file changed, 28 insertions(+), 19 deletions(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 451f8f0644c1..2259f0dff082 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -681,6 +681,32 @@ static struct phy *_of_phy_get(struct device_node *np, int index)
 	return phy;
 }
 
+/**
+ * of_phy_get_by_index() - lookup and obtain a reference to a phy using a
+ * device_node by index.
+ * @np: device_node for which to get the phy
+ * @index: index of the phy from device's point of view
+ *
+ * Returns the phy driver, after getting a refcount to it; or
+ * -ENODEV if there is no such phy. The caller is responsible for
+ * calling of_phy_put() to release that count.
+ */
+static struct phy *of_phy_get_by_index(struct device_node *np, int index)
+{
+	struct phy *phy;
+
+	phy = _of_phy_get(np, index);
+	if (IS_ERR(phy))
+		return phy;
+
+	if (!try_module_get(phy->ops->owner))
+		return ERR_PTR(-EPROBE_DEFER);
+
+	get_device(&phy->dev);
+
+	return phy;
+}
+
 /**
  * of_phy_get() - lookup and obtain a reference to a phy using a device_node.
  * @np: device_node for which to get the phy
@@ -692,22 +718,12 @@ static struct phy *_of_phy_get(struct device_node *np, int index)
  */
 struct phy *of_phy_get(struct device_node *np, const char *con_id)
 {
-	struct phy *phy = NULL;
 	int index = 0;
 
 	if (con_id)
 		index = of_property_match_string(np, "phy-names", con_id);
 
-	phy = _of_phy_get(np, index);
-	if (IS_ERR(phy))
-		return phy;
-
-	if (!try_module_get(phy->ops->owner))
-		return ERR_PTR(-EPROBE_DEFER);
-
-	get_device(&phy->dev);
-
-	return phy;
+	return of_phy_get_by_index(np, index);
 }
 EXPORT_SYMBOL_GPL(of_phy_get);
 
@@ -972,19 +988,12 @@ struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
 	if (!ptr)
 		return ERR_PTR(-ENOMEM);
 
-	phy = _of_phy_get(np, index);
+	phy = of_phy_get_by_index(np, index);
 	if (IS_ERR(phy)) {
 		devres_free(ptr);
 		return phy;
 	}
 
-	if (!try_module_get(phy->ops->owner)) {
-		devres_free(ptr);
-		return ERR_PTR(-EPROBE_DEFER);
-	}
-
-	get_device(&phy->dev);
-
 	*ptr = phy;
 	devres_add(dev, ptr);
 
-- 
2.55.0