summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/net/micrel.txt
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--Documentation/devicetree/bindings/net/micrel.txt47
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt
new file mode 100644
index 000000000..8d157f029
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/micrel.txt
@@ -0,0 +1,47 @@
+Micrel PHY properties.
+
+These properties cover the base properties Micrel PHYs.
+
+Optional properties:
+
+ - micrel,led-mode : LED mode value to set for PHYs with configurable LEDs.
+
+ Configure the LED mode with single value. The list of PHYs and the
+ bits that are currently supported:
+
+ KSZ8001: register 0x1e, bits 15..14
+ KSZ8041: register 0x1e, bits 15..14
+ KSZ8021: register 0x1f, bits 5..4
+ KSZ8031: register 0x1f, bits 5..4
+ KSZ8051: register 0x1f, bits 5..4
+ KSZ8081: register 0x1f, bits 5..4
+ KSZ8091: register 0x1f, bits 5..4
+
+ See the respective PHY datasheet for the mode values.
+
+ - micrel,rmii-reference-clock-select-25-mhz: RMII Reference Clock Select
+ bit selects 25 MHz mode
+
+ Setting the RMII Reference Clock Select bit enables 25 MHz rather
+ than 50 MHz clock mode.
+
+ Note that this option in only needed for certain PHY revisions with a
+ non-standard, inverted function of this configuration bit.
+ Specifically, a clock reference ("rmii-ref" below) is always needed to
+ actually select a mode.
+
+ - clocks, clock-names: contains clocks according to the common clock bindings.
+
+ 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.