Merge branch 'dt_fixed_phy'

Thomas Petazzoni says:

====================
Add DT support for fixed PHYs

Here is a fourth version of the patch set that adds a Device Tree
binding and the related code to support fixed PHYs. I'm hoping to get
this merged in 3.16.

Changes since v3:

 * Rebased on top of v3.15-rc5

 * In patch "net: phy: decouple PHY id and PHY address in fixed PHY
   driver", changed the PHY ID of fixed PHYs from 0xdeadbeef to 0x0,
   as suggested by Grant Likely.

 * Fixed the !CONFIG_PHY_FIXED case in patch "net: phy: extend fixed
   driver with fixed_phy_register()". Noticed by Florian Fainelli.

 * Added Acked-by from Grant Likely and Florian Fainelli on patch
   "net: phy: extend fixed driver with fixed_phy_register()".

 * Reworked the new fixed-link DT binding to be just a sub-node of the
   Ethernet MAC node, and not a node referenced by the 'phy'
   property. This was requested by Grant Likely.

 * Reworked the code implementing the new DT binding to also make it
   accept the old, single property based, DT binding.

 * Added a patch that actually uses the new fixed link DT binding for
   the Armada XP Matrix board.

Changes since v2:

 * Rebased on top of v3.14-rc1, and re-tested on hardware.

 * Removed the RFC tag, since there seems to be some real interest in
   this feature, and the code has gone through several iterations
   already.

 * The error handling in fixed_phy_register() has been fixed.

Changes since v1:

 * Instead of using a 'fixed-link' property inside the Ethernet device
   DT node, with a fairly cryptic succession of integer values, we now
   use a PHY subnode under the Ethernet device DT node, with explicit
   properties to configure the duplex, speed, pause and other PHY
   properties.

 * The PHY address is automatically allocated by the kernel and no
   longer visible in the Device Tree binding.

 * The PHY device is created directly when the network driver calls
   of_phy_connect_fixed_link(), and associated to the PHY DT node,
   which allows the existing of_phy_connect() function to work,
   without the need to use the deprecated of_phy_connect_fixed_link().

Posts of previous versions:

  RFCv1:   http://www.spinics.net/lists/netdev/msg243253.html
  RFCv2:   http://lists.infradead.org/pipermail/linux-arm-kernel/2013-September/196919.html
  PATCHv3: http://www.spinics.net/lists/netdev/msg273117.html
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 26 insertions, 0 deletions

diff --git a/include/linux/of_mdio.h b/include/linux/of_mdio.h
index 881a7c3571f4..0aa367e316cb 100644
--- a/include/linux/of_mdio.h
+++ b/include/linux/of_mdio.h
@@ -72,4 +72,19 @@ static inline struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np)
 }
 #endif /* CONFIG_OF */
 
+#if defined(CONFIG_OF) && defined(CONFIG_FIXED_PHY)
+extern int of_phy_register_fixed_link(struct device_node *np);
+extern bool of_phy_is_fixed_link(struct device_node *np);
+#else
+static inline int of_phy_register_fixed_link(struct device_node *np)
+{
+        return -ENOSYS;
+}
+static inline bool of_phy_is_fixed_link(struct device_node *np)
+{
+        return false;
+}
+#endif
+
+
 #endif /* __LINUX_OF_MDIO_H */
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index 509d8f5f984e..4f2478b47136 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -9,15 +9,26 @@ struct fixed_phy_status {
         int asym_pause;
 };
 
+struct device_node;
+
 #ifdef CONFIG_FIXED_PHY
 extern int fixed_phy_add(unsigned int irq, int phy_id,
                          struct fixed_phy_status *status);
+extern int fixed_phy_register(unsigned int irq,
+                              struct fixed_phy_status *status,
+                              struct device_node *np);
 #else
 static inline int fixed_phy_add(unsigned int irq, int phy_id,
                                 struct fixed_phy_status *status)
 {
         return -ENODEV;
 }
+static inline int fixed_phy_register(unsigned int irq,
+                                     struct fixed_phy_status *status,
+                                     struct device_node *np)
+{
+        return -ENODEV;
+}
 #endif /* CONFIG_FIXED_PHY */
 
 /*