thesis/linux-6.8.1/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml

# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/dsa/microchip,ksz.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Microchip KSZ Series Ethernet switches

maintainers:
  - Marek Vasut <marex@denx.de>
  - Woojung Huh <Woojung.Huh@microchip.com>

allOf:
  - $ref: /schemas/spi/spi-peripheral-props.yaml#

properties:
  # See Documentation/devicetree/bindings/net/dsa/dsa.yaml for a list of additional
  # required and optional properties.
  compatible:
    enum:
      - microchip,ksz8765
      - microchip,ksz8794
      - microchip,ksz8795
      - microchip,ksz8863
      - microchip,ksz8873
      - microchip,ksz9477
      - microchip,ksz9897
      - microchip,ksz9896
      - microchip,ksz9567
      - microchip,ksz8565
      - microchip,ksz9893
      - microchip,ksz9563
      - microchip,ksz8563

  reset-gpios:
    description:
      Should be a gpio specifier for a reset line.
    maxItems: 1

  wakeup-source: true

  microchip,synclko-125:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Set if the output SYNCLKO frequency should be set to 125MHz instead of 25MHz.

  microchip,synclko-disable:
    $ref: /schemas/types.yaml#/definitions/flag
    description:
      Set if the output SYNCLKO clock should be disabled. Do not mix with
      microchip,synclko-125.

  microchip,io-drive-strength-microamp:
    description:
      IO Pad Drive Strength
    enum: [8000, 16000]
    default: 16000

  microchip,hi-drive-strength-microamp:
    description:
      High Speed Drive Strength. Controls drive strength of GMII / RGMII /
      MII / RMII (except TX_CLK/REFCLKI, COL and CRS) and CLKO_25_125 lines.
    enum: [2000, 4000, 8000, 12000, 16000, 20000, 24000, 28000]
    default: 24000

  microchip,lo-drive-strength-microamp:
    description:
      Low Speed Drive Strength. Controls drive strength of TX_CLK / REFCLKI,
      COL, CRS, LEDs, PME_N, NTRP_N, SDO and SDI/SDA/MDIO lines.
    enum: [2000, 4000, 8000, 12000, 16000, 20000, 24000, 28000]
    default: 8000

  interrupts:
    maxItems: 1

required:
  - compatible
  - reg

if:
  not:
    properties:
      compatible:
        enum:
          - microchip,ksz8863
          - microchip,ksz8873
then:
  $ref: dsa.yaml#/$defs/ethernet-ports
else:
  patternProperties:
    "^(ethernet-)?ports$":
      patternProperties:
        "^(ethernet-)?port@[0-2]$":
          $ref: dsa-port.yaml#
          unevaluatedProperties: false
          properties:
            microchip,rmii-clk-internal:
              $ref: /schemas/types.yaml#/definitions/flag
              description:
                When ksz88x3 is acting as clock provier (via REFCLKO) it
                can select between internal and external RMII reference
                clock. Internal reference clock means that the clock for
                the RMII of ksz88x3 is provided by the ksz88x3 internally
                and the REFCLKI pin is unconnected. For the external
                reference clock, the clock needs to be fed back to ksz88x3
                via REFCLKI.
                If microchip,rmii-clk-internal is set, ksz88x3 will provide
                rmii reference clock internally, otherwise reference clock
                should be provided externally.
          dependencies:
            microchip,rmii-clk-internal: [ethernet]

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>

    // Ethernet switch connected via SPI to the host, CPU port wired to eth0:
    eth0 {
        fixed-link {
            speed = <1000>;
            full-duplex;
        };
    };

    spi {
        #address-cells = <1>;
        #size-cells = <0>;

        pinctrl-0 = <&pinctrl_spi_ksz>;
        cs-gpios = <&pioC 25 0>;
        id = <1>;

        ksz9477: switch@0 {
            compatible = "microchip,ksz9477";
            reg = <0>;
            reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;

            spi-max-frequency = <44000000>;

            ethernet-ports {
                #address-cells = <1>;
                #size-cells = <0>;
                port@0 {
                    reg = <0>;
                    label = "lan1";
                };
                port@1 {
                    reg = <1>;
                    label = "lan2";
                };
                port@2 {
                    reg = <2>;
                    label = "lan3";
                };
                port@3 {
                    reg = <3>;
                    label = "lan4";
                };
                port@4 {
                    reg = <4>;
                    label = "lan5";
                };
                port@5 {
                    reg = <5>;
                    ethernet = <&eth0>;
                    phy-mode = "rgmii";

                    fixed-link {
                        speed = <1000>;
                        full-duplex;
                    };
                };
            };
        };

        ksz8565: switch@1 {
            compatible = "microchip,ksz8565";
            reg = <1>;

            spi-max-frequency = <44000000>;

            ethernet-ports {
                #address-cells = <1>;
                #size-cells = <0>;
                port@0 {
                    reg = <0>;
                    label = "lan1";
                };
                port@1 {
                    reg = <1>;
                    label = "lan2";
                };
                port@2 {
                    reg = <2>;
                    label = "lan3";
                };
                port@3 {
                    reg = <3>;
                    label = "lan4";
                };
                port@6 {
                    reg = <6>;
                    ethernet = <&eth0>;
                    phy-mode = "rgmii";

                    fixed-link {
                        speed = <1000>;
                        full-duplex;
                    };
                };
            };
        };
    };
...