dt-bindings: net: mdio: Document common properties

Some of the properties pertaining to the broken turn around or resets
were only documented in ethernet-phy.yaml while they are applicable
across all MDIO devices and not Ethernet PHYs specifically which are a
superset.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/mdio.yaml

@@ -62,6 +62,34 @@ patternProperties:
         description:
           The ID number for the PHY.
 
+      broken-turn-around:
+        $ref: /schemas/types.yaml#definitions/flag
+        description:
+          If set, indicates the MDIO device does not correctly release
+          the turn around line low at end of the control phase of the
+          MDIO transaction.
+
+      resets:
+        maxItems: 1
+
+      reset-names:
+        const: phy
+
+      reset-gpios:
+        maxItems: 1
+        description:
+          The GPIO phandle and specifier for the MDIO reset signal.
+
+      reset-assert-us:
+        description:
+          Delay after the reset was asserted in microseconds. If this
+          property is missing the delay will be skipped.
+
+      reset-deassert-us:
+        description:
+          Delay after the reset was deasserted in microseconds. If
+          this property is missing the delay will be skipped.
+
     required:
       - reg