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# 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 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>; }; |