Adding devm_of_phy_get_by_index to get phys by supplying an index
and not a phy name when multiple phys are declared

Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Arun Ramamurthy <redacted>
---
 drivers/phy/phy-core.c  | 30 ++++++++++++++++++++++++++++++
 include/linux/phy/phy.h |  2 ++
 2 files changed, 32 insertions(+)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index a12d353..0c03876 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c

@@ -622,6 +622,36 @@ struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
 EXPORT_SYMBOL_GPL(devm_of_phy_get);
 
 /**
+ * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
+ * @dev: device that requests this phy
+ * @np: node containing the phy
+ * @index: index of the phy
+ *
+ * Gets the phy using _of_phy_get(), and associates a device with it using
+ * devres. On driver detach, release function is invoked on the devres data,
+ * then, devres data is freed.
+ *
+ */
+struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
+				     int index)
+{
+	struct phy **ptr, *phy;
+
+	ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	phy = _of_phy_get(np, index);
+	if (!IS_ERR(phy)) {
+		*ptr = phy;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return phy;
+}

+/**
  * phy_create() - create a new phy
  * @dev: device that is creating the new phy
  * @node: device node of the phy

diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index a0197fa..ae2ffaf 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h

@@ -133,6 +133,8 @@ struct phy *devm_phy_get(struct device *dev, const char *string);
 struct phy *devm_phy_optional_get(struct device *dev, const char *string);
 struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
 			    const char *con_id);
+struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
+				     int index);
 void phy_put(struct phy *phy);
 void devm_phy_put(struct device *dev, struct phy *phy);
 struct phy *of_phy_get(struct device_node *np, const char *con_id);

-- 
2.3.2