Documentation/devicetree/bindings/net/fsl,fman-mdio.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/fsl,fman-mdio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Freescale Frame Manager MDIO Device

maintainers:
  - Frank Li <Frank.Li@nxp.com>

description: FMan MDIO Node.
  The MDIO is a bus to which the PHY devices are connected.

properties:
  compatible:
    enum:
      - fsl,fman-mdio
      - fsl,fman-xmdio
      - fsl,fman-memac-mdio
    description:
      Must include "fsl,fman-mdio" for 1 Gb/s MDIO from FMan v2.
      Must include "fsl,fman-xmdio" for 10 Gb/s MDIO from FMan v2.
      Must include "fsl,fman-memac-mdio" for 1/10 Gb/s MDIO from
      FMan v3.

  reg:
    maxItems: 1

  clocks:
    items:
      - description: A reference to the input clock of the controller
          from which the MDC frequency is derived.

  interrupts:
    maxItems: 1

  fsl,fman-internal-mdio:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Fman has internal MDIO for internal PCS(Physical
      Coding Sublayer) PHYs and external MDIO for external PHYs.
      The settings and programming routines for internal/external
      MDIO are different. Must be included for internal MDIO.

  fsl,erratum-a009885:
    $ref: /schemas/types.yaml#/definitions/flag
    description: Indicates the presence of the A009885
      erratum describing that the contents of MDIO_DATA may
      become corrupt unless it is read within 16 MDC cycles
      of MDIO_CFG[BSY] being cleared, when performing an
      MDIO read operation.

  fsl,erratum-a011043:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Indicates the presence of the A011043 erratum
      describing that the MDIO_CFG[MDIO_RD_ER] bit may be falsely
      set when reading internal PCS registers. MDIO reads to
      internal PCS registers may result in having the
      MDIO_CFG[MDIO_RD_ER] bit set, even when there is no error and
      read data (MDIO_DATA[MDIO_DATA]) is correct.
      Software may get false read error when reading internal
      PCS registers through MDIO. As a workaround, all internal
      MDIO accesses should ignore the MDIO_CFG[MDIO_RD_ER] bit.

      For internal PHY device on internal mdio bus, a PHY node should be created.
      See the definition of the PHY node in booting-without-of.txt for an
      example of how to define a PHY (Internal PHY has no interrupt line).
      - For "fsl,fman-mdio" compatible internal mdio bus, the PHY is TBI PHY.
      - For "fsl,fman-memac-mdio" compatible internal mdio bus, the PHY is PCS PHY.
        The PCS PHY address should correspond to the value of the appropriate
        MDEV_PORT.

  little-endian:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      IP block is little-endian mode. The default endian mode is big-endian.

required:
  - compatible
  - reg

allOf:
  - $ref: mdio.yaml#

unevaluatedProperties: false

examples:
  - |
    mdio@f1000 {
        compatible = "fsl,fman-xmdio";
        reg = <0xf1000 0x1000>;
        interrupts = <101 2 0 0>;
    };

  - |
    mdio@e3120 {
        compatible = "fsl,fman-mdio";
        reg = <0xe3120 0xee0>;
        fsl,fman-internal-mdio;
        #address-cells = <1>;
        #size-cells = <0>;

        tbi-phy@8 {
            reg = <0x8>;
            device_type = "tbi-phy";
        };
    };

  - |
    mdio@f1000 {
        compatible = "fsl,fman-memac-mdio";
        reg = <0xf1000 0x1000>;
        fsl,fman-internal-mdio;
        #address-cells = <1>;
        #size-cells = <0>;

        pcsphy6: ethernet-phy@0 {
            reg = <0x0>;
        };
    };