of_mdio: Abstract a general interface for phy connect

Abstract a general interface "of_phy_get_and_connect"
for PHY connect. User will have no bother with getting
"phy-mode" and "phy-handle" any more.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Dongpo Li <lidongpo@hisilicon.com>
Reviewed-by: Jiancheng Xue <xuejiancheng@hisilicon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index e2b50bc..b470f7e 100644 (file)
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -19,6 +19,7 @@
 #include <linux/of_gpio.h>
 #include <linux/of_irq.h>
 #include <linux/of_mdio.h>
+#include <linux/of_net.h>
 #include <linux/module.h>
 
 MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
@@ -332,6 +333,41 @@ struct phy_device *of_phy_connect(struct net_device *dev,
 EXPORT_SYMBOL(of_phy_connect);
 
 /**
+ * of_phy_get_and_connect
+ * - Get phy node and connect to the phy described in the device tree
+ * @dev: pointer to net_device claiming the phy
+ * @np: Pointer to device tree node for the net_device claiming the phy
+ * @hndlr: Link state callback for the network device
+ *
+ * If successful, returns a pointer to the phy_device with the embedded
+ * struct device refcount incremented by one, or NULL on failure. The
+ * refcount must be dropped by calling phy_disconnect() or phy_detach().
+ */
+struct phy_device *of_phy_get_and_connect(struct net_device *dev,
+                                         struct device_node *np,
+                                         void (*hndlr)(struct net_device *))
+{
+       phy_interface_t iface;
+       struct device_node *phy_np;
+       struct phy_device *phy;
+
+       iface = of_get_phy_mode(np);
+       if (iface < 0)
+               return NULL;
+
+       phy_np = of_parse_phandle(np, "phy-handle", 0);
+       if (!phy_np)
+               return NULL;
+
+       phy = of_phy_connect(dev, phy_np, hndlr, 0, iface);
+
+       of_node_put(phy_np);
+
+       return phy;
+}
+EXPORT_SYMBOL(of_phy_get_and_connect);
+
+/**
  * of_phy_attach - Attach to a PHY without starting the state machine
  * @dev: pointer to net_device claiming the phy
  * @phy_np: Node pointer for the PHY

diff --git a/include/linux/of_mdio.h b/include/linux/of_mdio.h
index 4b04587..2ab2336 100644 (file)
--- a/include/linux/of_mdio.h
+++ b/include/linux/of_mdio.h
@@ -19,6 +19,9 @@ extern struct phy_device *of_phy_connect(struct net_device *dev,
                                         struct device_node *phy_np,
                                         void (*hndlr)(struct net_device *),
                                         u32 flags, phy_interface_t iface);
+extern struct phy_device *
+of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
+                      void (*hndlr)(struct net_device *));
 struct phy_device *of_phy_attach(struct net_device *dev,
                                 struct device_node *phy_np, u32 flags,
                                 phy_interface_t iface);
@@ -52,6 +55,13 @@ static inline struct phy_device *of_phy_connect(struct net_device *dev,
        return NULL;
 }
 
+static inline struct phy_device *
+of_phy_get_and_connect(struct net_device *dev, struct device_node *np,
+                      void (*hndlr)(struct net_device *))
+{
+       return NULL;
+}
+
 static inline struct phy_device *of_phy_attach(struct net_device *dev,
                                               struct device_node *phy_np,
                                               u32 flags, phy_interface_t iface)