[PATCH v3 1/5] phy: core: Add common helper to add phy phandle device link

[Inochi Amaoto <inochiama@gmail.com>]

It is very common for adding a device link for phy phandle
for device managed phy helper functions. So add a common
helper for future reuse.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/phy/phy-core.c | 39 ++++++++++++++++++++++++---------------
 1 file changed, 24 insertions(+), 15 deletions(-)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 21aaf2f76e53..7be649f14797 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -606,6 +606,27 @@ int phy_validate(struct phy *phy, enum phy_mode mode, int submode,
 }
 EXPORT_SYMBOL_GPL(phy_validate);
 
+/**
+ * phy_add_device_link() - Associate the phy with the device
+ * @dev: the device consuming the PHY
+ * @phy: the PHY supplied to @dev
+ *
+ * Add a device link with @dev as the consumer and @phy as the
+ * PHY supplier.
+ */
+static void phy_add_device_link(struct device *dev, struct phy *phy)
+{
+	struct device_link *link;
+
+	if (!phy)
+		return;
+
+	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
+	if (!link)
+		dev_dbg(dev, "failed to create device link to %s\n",
+			dev_name(phy->dev.parent));
+}
+
 /**
  * _of_phy_get() - lookup and obtain a reference to a phy by phandle
  * @np: device_node for which to get the phy
@@ -784,7 +805,6 @@ struct phy *phy_get(struct device *dev, const char *string)
 {
 	int index = 0;
 	struct phy *phy;
-	struct device_link *link;
 
 	if (dev->of_node) {
 		if (string)
@@ -808,10 +828,7 @@ struct phy *phy_get(struct device *dev, const char *string)
 
 	get_device(&phy->dev);
 
-	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
-	if (!link)
-		dev_dbg(dev, "failed to create device link to %s\n",
-			dev_name(phy->dev.parent));
+	phy_add_device_link(dev, phy);
 
 	return phy;
 }
@@ -885,7 +902,6 @@ struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
 			    const char *con_id)
 {
 	struct phy **ptr, *phy;
-	struct device_link *link;
 
 	ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
 	if (!ptr)
@@ -900,10 +916,7 @@ struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
 		return phy;
 	}
 
-	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
-	if (!link)
-		dev_dbg(dev, "failed to create device link to %s\n",
-			dev_name(phy->dev.parent));
+	phy_add_device_link(dev, phy);
 
 	return phy;
 }
@@ -955,7 +968,6 @@ struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
 				     int index)
 {
 	struct phy **ptr, *phy;
-	struct device_link *link;
 
 	ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
 	if (!ptr)
@@ -977,10 +989,7 @@ struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
 	*ptr = phy;
 	devres_add(dev, ptr);
 
-	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
-	if (!link)
-		dev_dbg(dev, "failed to create device link to %s\n",
-			dev_name(phy->dev.parent));
+	phy_add_device_link(dev, phy);
 
 	return phy;
 }
-- 
2.55.0