xref: /openbmc/linux/Documentation/devicetree/bindings/phy/phy-tegra194-p2u.yaml (revision 93134b0a)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/phy/phy-tegra194-p2u.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"

title: NVIDIA Tegra194 & Tegra234 P2U binding

maintainers:
  - Thierry Reding <treding@nvidia.com>

description: >
  Tegra194 has two PHY bricks namely HSIO (High Speed IO) and NVHS (NVIDIA High
  Speed) each interfacing with 12 and 8 P2U instances respectively.
  Tegra234 has three PHY bricks namely HSIO, NVHS and GBE (Gigabit Ethernet)
  each interfacing with 8, 8 and 8 P2U instances respectively.
  A P2U instance is a glue logic between Synopsys DesignWare Core PCIe IP's PIPE
  interface and PHY of HSIO/NVHS/GBE bricks. Each P2U instance represents one
  PCIe lane.

properties:
  compatible:
    enum:
      - nvidia,tegra194-p2u
      - nvidia,tegra234-p2u

  reg:
    maxItems: 1
    description: Should be the physical address space and length of respective each P2U instance.

  reg-names:
    items:
      - const: ctl

  nvidia,skip-sz-protect-en:
    description: Should be present if two PCIe retimers are present between
      the root port and its immediate downstream device.
    type: boolean

  '#phy-cells':
    const: 0

additionalProperties: false

examples:
  - |
    p2u_hsio_0: phy@3e10000 {
        compatible = "nvidia,tegra194-p2u";
        reg = <0x03e10000 0x10000>;
        reg-names = "ctl";

        #phy-cells = <0>;
    };