xref: /openbmc/linux/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml (revision 52b2fe45)

# SPDX-License-Identifier: GPL-2.0+
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/nxp,tja11xx.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NXP TJA11xx PHY

maintainers:
  - Andrew Lunn <andrew@lunn.ch>
  - Florian Fainelli <f.fainelli@gmail.com>
  - Heiner Kallweit <hkallweit1@gmail.com>

description:
  Bindings for NXP TJA11xx automotive PHYs

allOf:
  - $ref: ethernet-phy.yaml#

patternProperties:
  "^ethernet-phy@[0-9a-f]+$":
    type: object
    description: |
      Some packages have multiple PHYs. Secondary PHY should be defines as
      subnode of the first (parent) PHY.

    properties:
      reg:
        minimum: 0
        maximum: 31
        description:
          The ID number for the child PHY. Should be +1 of parent PHY.

      nxp,rmii-refclk-in:
        type: boolean
        description: |
          The REF_CLK is provided for both transmitted and received data
          in RMII mode. This clock signal is provided by the PHY and is
          typically derived from an external 25MHz crystal. Alternatively,
          a 50MHz clock signal generated by an external oscillator can be
          connected to pin REF_CLK. A third option is to connect a 25MHz
          clock to pin CLK_IN_OUT. So, the REF_CLK should be configured
          as input or output according to the actual circuit connection.
          If present, indicates that the REF_CLK will be configured as
          interface reference clock input when RMII mode enabled.
          If not present, the REF_CLK will be configured as interface
          reference clock output when RMII mode enabled.
          Only supported on TJA1100 and TJA1101.

    required:
      - reg

unevaluatedProperties: false

examples:
  - |
    mdio {
        #address-cells = <1>;
        #size-cells = <0>;

        tja1101_phy0: ethernet-phy@4 {
            reg = <0x4>;
            nxp,rmii-refclk-in;
        };
    };
  - |
    mdio {
        #address-cells = <1>;
        #size-cells = <0>;

        tja1102_phy0: ethernet-phy@4 {
            reg = <0x4>;
            #address-cells = <1>;
            #size-cells = <0>;

            tja1102_phy1: ethernet-phy@5 {
                reg = <0x5>;
            };
        };
    };