Re: [PATCH v2] net/phy: micrel: Add OF configuration support

Some boards require custom PHY configuration, for example due to trace
length differences.  Add the ability to configure these registers in
order to get the PHY to function on boards that need it.

Because PHYs are auto-detected based on MDIO device IDs, allow PHY
configuration to be specified in the parent Ethernet device node if no
PHY device node is present.

Signed-off-by: Sean Cross <redacted>
---
 .../devicetree/bindings/net/micrel-phy.txt         |   20 ++++++++
 drivers/net/phy/micrel.c                           |   50 ++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/micrel-phy.txt

diff --git a/Documentation/devicetree/bindings/net/micrel-phy.txt b/Documentation/devicetree/bindings/net/micrel-phy.txt
new file mode 100644
index 0000000..97c1ef2
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/micrel-phy.txt

@@ -0,0 +1,20 @@
+Micrel KS8737, KSZ8041, KSZ8001, KS8721, KSZ8081, KSZ8091, KSZ8061, KSZ9021,
+KSZ9031, Ethernet PHYs, and KSZ8873MLL and KSZ886X Ethernet switches.
+
+Some boards require special tuning values, particularly when it comes to
+clock delays.  You can specify clock delay values by adding
+micrel-specific properties to an Ethernet OF device node.
+
+Optional properties:
+- micrel,clk-control-pad-skew : Timing offset for the MII clock line
+- micrel,rx-data-pad-skew : Timing offset for the RX MII pad
+- micrel,tx-data-pad-skew : Timing offset for the TX MII pad
+
+Example:
+	&enet {
+		micrel,clk-control-pad-skew = <0xf0f0>;
+		micrel,rx-data-pad-skew = <0x0000>;
+		micrel,tx-data-pad-skew = <0xffff>;
+		status = "okay";
+	};