1 # SPDX-License-Identifier: GPL-2.0
4 $id: http://devicetree.org/schemas/net/mdio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: MDIO Bus Generic Binding
10 - Andrew Lunn <andrew@lunn.ch>
11 - Florian Fainelli <f.fainelli@gmail.com>
12 - Heiner Kallweit <hkallweit1@gmail.com>
15 These are generic properties that can apply to any MDIO bus. Any
16 MDIO bus must have a list of child nodes, one per device on the
17 bus. These should follow the generic ethernet-phy.yaml document, or
18 a device specific binding document.
22 pattern: "^mdio(@.*)?"
33 The phandle and specifier for the GPIO that controls the RESET
34 lines of all devices on that MDIO bus.
38 RESET pulse width in microseconds. It applies to all MDIO devices
39 and must therefore be appropriately determined based on all devices
40 requirements (maximum value of all per-device RESET pulse widths).
44 Desired MDIO bus clock frequency in Hz. Values greater than IEEE 802.3
45 defined 2.5MHz should only be used when all devices on the bus support
46 the given clock speed.
50 The 32 bit preamble should be suppressed. In order for this to
51 work, all devices on the bus must support suppressed preamble.
55 "^ethernet-phy@[0-9a-f]+$":
63 The ID number for the device.
66 $ref: /schemas/types.yaml#definitions/flag
68 If set, indicates the MDIO device does not correctly release
69 the turn around line low at end of the control phase of the
81 The GPIO phandle and specifier for the MDIO reset signal.
85 Delay after the reset was asserted in microseconds. If this
86 property is missing the delay will be skipped.
90 Delay after the reset was deasserted in microseconds. If
91 this property is missing the delay will be skipped.
98 davinci_mdio: mdio@5c030000 {
99 reg = <0x5c030000 0x1000>;
100 #address-cells = <1>;
103 reset-gpios = <&gpio2 5 1>;
104 reset-delay-us = <2>;
106 ethphy0: ethernet-phy@1 {
110 ethphy1: ethernet-phy@3 {