linux/Documentation/devicetree/bindings/net/mediatek-dwmac.yaml

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

title: MediaTek DWMAC glue layer controller

maintainers:
  - Biao Huang <biao.huang@mediatek.com>

description:
  This file documents platform glue layer for stmmac.

# We need a select here so we don't match all nodes with 'snps,dwmac'
select:
  properties:
    compatible:
      contains:
        enum:
          - mediatek,mt2712-gmac
          - mediatek,mt8188-gmac
          - mediatek,mt8195-gmac
  required:
    - compatible

allOf:
  - $ref: snps,dwmac.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - mediatek,mt2712-gmac
          - const: snps,dwmac-4.20a
      - items:
          - enum:
              - mediatek,mt8195-gmac
          - const: snps,dwmac-5.10a
      - items:
          - enum:
              - mediatek,mt8188-gmac
          - const: mediatek,mt8195-gmac
          - const: snps,dwmac-5.10a

  clocks:
    minItems: 5
    items:
      - description: AXI clock
      - description: APB clock
      - description: MAC Main clock
      - description: PTP clock
      - description: RMII reference clock provided by MAC
      - description: MAC clock gate

  clock-names:
    minItems: 5
    items:
      - const: axi
      - const: apb
      - const: mac_main
      - const: ptp_ref
      - const: rmii_internal
      - const: mac_cg

  power-domains:
    maxItems: 1

  mediatek,pericfg:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      The phandle to the syscon node that control ethernet
      interface and timing delay.

  mediatek,tx-delay-ps:
    description:
      The internal TX clock delay (provided by this driver) in nanoseconds.
      For MT2712 RGMII interface, Allowed value need to be a multiple of 170,
      or will round down. Range 0~31*170.
      For MT2712 RMII/MII interface, Allowed value need to be a multiple of 550,
      or will round down. Range 0~31*550.
      For MT8188/MT8195 RGMII/RMII/MII interface, Allowed value need to be a multiple of 290,
      or will round down. Range 0~31*290.

  mediatek,rx-delay-ps:
    description:
      The internal RX clock delay (provided by this driver) in nanoseconds.
      For MT2712 RGMII interface, Allowed value need to be a multiple of 170,
      or will round down. Range 0~31*170.
      For MT2712 RMII/MII interface, Allowed value need to be a multiple of 550,
      or will round down. Range 0~31*550.
      For MT8188/MT8195 RGMII/RMII/MII interface, Allowed value need to be a multiple
      of 290, or will round down. Range 0~31*290.

  mediatek,rmii-rxc:
    type: boolean
    description:
      If present, indicates that the RMII reference clock, which is from external
      PHYs, is connected to RXC pin. Otherwise, is connected to TXC pin.

  mediatek,rmii-clk-from-mac:
    type: boolean
    description:
      If present, indicates that MAC provides the RMII reference clock, which
      outputs to TXC pin only.

  mediatek,txc-inverse:
    type: boolean
    description:
      If present, indicates that
      1. tx clock will be inversed in MII/RGMII case,
      2. tx clock inside MAC will be inversed relative to reference clock
         which is from external PHYs in RMII case, and it rarely happen.
      3. the reference clock, which outputs to TXC pin will be inversed in RMII case
         when the reference clock is from MAC.

  mediatek,rxc-inverse:
    type: boolean
    description:
      If present, indicates that
      1. rx clock will be inversed in MII/RGMII case.
      2. reference clock will be inversed when arrived at MAC in RMII case, when
         the reference clock is from external PHYs.
      3. the inside clock, which be sent to MAC, will be inversed in RMII case when
         the reference clock is from MAC.

  mediatek,mac-wol:
    type: boolean
    description:
      If present, indicates that MAC supports WOL(Wake-On-LAN), and MAC WOL will be enabled.
      Otherwise, PHY WOL is perferred.

required:
  - compatible
  - reg
  - interrupts
  - interrupt-names
  - clocks
  - clock-names
  - phy-mode
  - mediatek,pericfg

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/clock/mt2712-clk.h>
    #include <dt-bindings/gpio/gpio.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/interrupt-controller/irq.h>
    #include <dt-bindings/power/mt2712-power.h>

    eth: ethernet@1101c000 {
        compatible = "mediatek,mt2712-gmac", "snps,dwmac-4.20a";
        reg = <0x1101c000 0x1300>;
        interrupts = <GIC_SPI 237 IRQ_TYPE_LEVEL_LOW>;
        interrupt-names = "macirq";
        phy-mode = "rgmii-rxid";
        mac-address = [00 55 7b b5 7d f7];
        clock-names = "axi",
                      "apb",
                      "mac_main",
                      "ptp_ref",
                      "rmii_internal";
        clocks = <&pericfg CLK_PERI_GMAC>,
                 <&pericfg CLK_PERI_GMAC_PCLK>,
                 <&topckgen CLK_TOP_ETHER_125M_SEL>,
                 <&topckgen CLK_TOP_ETHER_50M_SEL>,
                 <&topckgen CLK_TOP_ETHER_50M_RMII_SEL>;
        assigned-clocks = <&topckgen CLK_TOP_ETHER_125M_SEL>,
                          <&topckgen CLK_TOP_ETHER_50M_SEL>,
                          <&topckgen CLK_TOP_ETHER_50M_RMII_SEL>;
        assigned-clock-parents = <&topckgen CLK_TOP_ETHERPLL_125M>,
                                 <&topckgen CLK_TOP_APLL1_D3>,
                                 <&topckgen CLK_TOP_ETHERPLL_50M>;
        power-domains = <&scpsys MT2712_POWER_DOMAIN_AUDIO>;
        mediatek,pericfg = <&pericfg>;
        mediatek,tx-delay-ps = <1530>;
        snps,txpbl = <1>;
        snps,rxpbl = <1>;
        snps,reset-gpio = <&pio 87 GPIO_ACTIVE_LOW>;
        snps,reset-delays-us = <0 10000 10000>;
    };