Merge tag 'tegra-for-4.8-i2c' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra...

[cascardo/linux.git] / Documentation / devicetree / bindings / net / micrel.txt

diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt
index 87496a8..8d157f0 100644 (file)
--- a/Documentation/devicetree/bindings/net/micrel.txt
+++ b/Documentation/devicetree/bindings/net/micrel.txt
@@ -35,3 +35,13 @@ Optional properties:
        supported clocks:
        - KSZ8021, KSZ8031, KSZ8081, KSZ8091: "rmii-ref": The RMII reference
          input clock. Used to determine the XI input clock.
+
+ - micrel,fiber-mode: If present the PHY is configured to operate in fiber mode
+
+       Some PHYs, such as the KSZ8041FTL variant, support fiber mode, enabled
+       by the FXEN boot strapping pin. It can't be determined from the PHY
+       registers whether the PHY is in fiber mode, so this boolean device tree
+       property can be used to describe it.
+
+       In fiber mode, auto-negotiation is disabled and the PHY can only work in
+       100base-fx (full and half duplex) modes.