[PATCH 2/3] netdev/phy/of: Handle IEEE802.3 clause 45 Ethernet PHYs in of_mdiobus_register()

[David Daney <david.daney@cavium.com>]

Define two new "compatible" values for Ethernet
PHYs. "ethernet-phy-ieee802.3-c22" and "ethernet-phy-ieee802.3-c45"
are used to indicate a PHY uses the corresponding protocol.

If a PHY is "compatible" with "ethernet-phy-ieee802.3-c45", we
indicate this so that get_phy_device() can properly probe the device.

Signed-off-by: David Daney <david.daney@cavium.com>
---
 Documentation/devicetree/bindings/net/phy.txt |   12 +++++++++++-
 drivers/of/of_mdio.c                          |    4 ++++
 2 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/phy.txt b/Documentation/devicetree/bindings/net/phy.txt
index bb8c742..de9cb32 100644
--- a/Documentation/devicetree/bindings/net/phy.txt
+++ b/Documentation/devicetree/bindings/net/phy.txt
@@ -16,8 +16,18 @@ Required properties:
 
 Example:
 
+Optional Properties:
+
+- compatible: Compatible list, may contain "ethernet-phy-ieee802.3-c22" or
+              "ethernet-phy-ieee802.3-c45" for PHYs that implement
+              IEEE802.3 clause 22 or IEEE802.3 clause 45
+              specifications.  If neither of these are specified, the
+              default is to assume clause 22.  The compatible list may
+              also contain other elements.
+
 ethernet-phy@0 {
-	linux,phandle = <2452000>
+	compatible = "ethernet-phy-ieee802.3-c22";
+	linux,phandle = <2452000>;
 	interrupt-parent = <40000>;
 	interrupts = <35 1>;
 	reg = <0>;
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index 7c28e8c..f837a7f 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -79,6 +79,10 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
 				mdio->irq[addr] = PHY_POLL;
 		}
 
+		if (of_device_is_compatible(child,
+					    "ethernet-phy-ieee802.3-c45"))
+			addr |= MII_ADDR_C45;
+
 		phy = get_phy_device(mdio, addr);
 		if (!phy || IS_ERR(phy)) {
 			dev_err(&mdio->dev, "error probing PHY at address %i\n",
-- 
1.7.2.3