phy: core: Add devm_of_phy_get to phy-core

Adding devm_of_phy_get will allow to get phys by supplying a
pointer to the struct device_node instead of struct device.

Signed-off-by: Kamil Debski <k.debski@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
[backport from upstream commit b5d682f4eb76c98f2ca5658926df43dd05cf2c37]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Change-Id: Ie1d75af85ef1072457074d94ab268c5d570ed930

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 7c1b0e1..623b71c 100644 (file)
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -526,6 +526,37 @@ struct phy *devm_phy_optional_get(struct device *dev, const char *string)
 EXPORT_SYMBOL_GPL(devm_phy_optional_get);
 
 /**
+ * devm_of_phy_get() - lookup and obtain a reference to a phy.
+ * @dev: device that requests this phy
+ * @np: node containing the phy
+ * @con_id: name of the phy from device's point of view
+ *
+ * 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(struct device *dev, struct device_node *np,
+                           const char *con_id)
+{
+       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, con_id);
+       if (!IS_ERR(phy)) {
+               *ptr = phy;
+               devres_add(dev, ptr);
+       } else {
+               devres_free(ptr);
+       }
+
+       return phy;
+}
+EXPORT_SYMBOL_GPL(devm_of_phy_get);
+
+/**
  * phy_create() - create a new phy
  * @dev: device that is creating the new phy
  * @ops: function pointers for performing phy operations

diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 50c7629..e2f5ca9 100644 (file)
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -149,6 +149,8 @@ struct phy *phy_get(struct device *dev, const char *string);
 struct phy *phy_optional_get(struct device *dev, const char *string);
 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);
 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);
@@ -252,6 +254,13 @@ static inline struct phy *devm_phy_optional_get(struct device *dev,
        return ERR_PTR(-ENOSYS);
 }
 
+static inline struct phy *devm_of_phy_get(struct device *dev,
+                                         struct device_node *np,
+                                         const char *con_id)
+{
+       return ERR_PTR(-ENOSYS);
+}
+
 static inline void phy_put(struct phy *phy)
 {
 }