It defines that PHY nodes must be children on MDIO bus nodes and defines
the only required property in U-Boot, reg. This property along with the
example provided are copied over from Linux.
Signed-off-by: Alex Marginean <alexm.ossl...@gmail.com>
---
doc/device-tree-bindings/net/phy.txt | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
create mode 100644 doc/device-tree-bindings/net/phy.txt
diff --git a/doc/device-tree-bindings/net/phy.txt
b/doc/device-tree-bindings/net/phy.txt
new file mode 100644
index 0000000000..6599c667b5
--- /dev/null
+++ b/doc/device-tree-bindings/net/phy.txt
@@ -0,0 +1,24 @@
+PHY nodes
+
+If the device tree is used to describe networking interfaces, U-Boot expects a
+node for each PHY. Parent node for such a PHY node is expected to correspond
to
+a MDIO bus and the bus is used to access the PHY.
+
+Required properties:
+
+ - reg : The ID number for the phy, usually a small integer
+
+Example:
+
+ethernet-phy@0 {
+ compatible = "ethernet-phy-id0141.0e90", "ethernet-phy-ieee802.3-c22";
+ interrupt-parent = <&PIC>;
+ interrupts = <35 IRQ_TYPE_EDGE_RISING>;
+ reg = <0>;
+
+ resets = <&rst 8>;
+ reset-names = "phy";
+ reset-gpios = <&gpio1 4 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <1000>;
+ reset-deassert-us = <2000>;
+};
--
2.17.1
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