xref: /linux/Documentation/devicetree/bindings/net/eswin,eic7700-eth.yaml (revision 68993ced0f618e36cf33388f1e50223e5e6e78cc)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/eswin,eic7700-eth.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Eswin EIC7700 SOC Eth Controller

maintainers:
  - Shuang Liang <liangshuang@eswincomputing.com>
  - Zhi Li <lizhi2@eswincomputing.com>
  - Shangjuan Wei <weishangjuan@eswincomputing.com>

description:
  Platform glue layer implementation for STMMAC Ethernet driver.

select:
  properties:
    compatible:
      contains:
        enum:
          - eswin,eic7700-qos-eth
  required:
    - compatible

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

properties:
  compatible:
    items:
      - const: eswin,eic7700-qos-eth
      - const: snps,dwmac-5.20

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  interrupt-names:
    const: macirq

  clocks:
    items:
      - description: AXI clock
      - description: Configuration clock
      - description: GMAC main clock
      - description: Tx clock

  clock-names:
    items:
      - const: axi
      - const: cfg
      - const: stmmaceth
      - const: tx

  resets:
    maxItems: 1

  reset-names:
    items:
      - const: stmmaceth

  rx-internal-delay-ps:
    enum: [0, 200, 600, 1200, 1600, 1800, 2000, 2200, 2400]

  tx-internal-delay-ps:
    enum: [0, 200, 600, 1200, 1600, 1800, 2000, 2200, 2400]

  eswin,hsp-sp-csr:
    description:
      HSP CSR is to control and get status of different high-speed peripherals
      (such as Ethernet, USB, SATA, etc.) via register, which can tune
      board-level's parameters of PHY, etc.

      Additional background information about the High-Speed Subsystem
      and the HSP CSR block is available in Chapter 10 ("High-Speed Interface")
      of the EIC7700X SoC Technical Reference Manual, Part 4
      (EIC7700X_SoC_Technical_Reference_Manual_Part4.pdf). The manual is
      publicly available at
      https://github.com/eswincomputing/EIC7700X-SoC-Technical-Reference-Manual/releases

      This reference is provided for background information only.
    $ref: /schemas/types.yaml#/definitions/phandle-array
    items:
      - items:
          - description: Phandle to HSP(High-Speed Peripheral) device
          - description: Offset of phy control register for internal
                         or external clock selection
          - description: Offset of AXI clock controller Low-Power request
                         register
          - description: Offset of register controlling TX/RX clock delay
          - description: Optional offset of register controlling TXD delay
          - description: Optional offset of register controlling RXD delay

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - interrupts
  - interrupt-names
  - phy-mode
  - resets
  - reset-names
  - rx-internal-delay-ps
  - tx-internal-delay-ps
  - eswin,hsp-sp-csr

unevaluatedProperties: false

examples:
  - |
    ethernet@50400000 {
        compatible = "eswin,eic7700-qos-eth", "snps,dwmac-5.20";
        reg = <0x50400000 0x10000>;
        clocks = <&d0_clock 186>, <&d0_clock 171>, <&d0_clock 40>,
                <&d0_clock 193>;
        clock-names = "axi", "cfg", "stmmaceth", "tx";
        interrupt-parent = <&plic>;
        interrupts = <61>;
        interrupt-names = "macirq";
        phy-mode = "rgmii-id";
        phy-handle = <&phy0>;
        resets = <&reset 95>;
        reset-names = "stmmaceth";
        rx-internal-delay-ps = <200>;
        tx-internal-delay-ps = <200>;
        eswin,hsp-sp-csr = <&hsp_sp_csr 0x100 0x108 0x118 0x114 0x11c>;
        snps,axi-config = <&stmmac_axi_setup>;
        snps,aal;
        snps,fixed-burst;
        snps,tso;
        stmmac_axi_setup: stmmac-axi-config {
            snps,blen = <0 0 0 0 16 8 4>;
            snps,rd_osr_lmt = <2>;
            snps,wr_osr_lmt = <2>;
        };
    };