1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-C 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/phy/phy-teg !! 4 $id: "http://devicetree.org/schemas/phy/phy-tegra194-p2u.yaml#"
5 $schema: http://devicetree.org/meta-schemas/co !! 5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
6 6
7 title: NVIDIA Tegra194 & Tegra234 P2U !! 7 title: NVIDIA Tegra194 P2U binding
8 8
9 maintainers: 9 maintainers:
10 - Thierry Reding <treding@nvidia.com> 10 - Thierry Reding <treding@nvidia.com>
11 11
12 description: > 12 description: >
13 Tegra194 has two PHY bricks namely HSIO (Hig 13 Tegra194 has two PHY bricks namely HSIO (High Speed IO) and NVHS (NVIDIA High
14 Speed) each interfacing with 12 and 8 P2U in 14 Speed) each interfacing with 12 and 8 P2U instances respectively.
15 Tegra234 has three PHY bricks namely HSIO, N <<
16 each interfacing with 8, 8 and 8 P2U instanc <<
17 A P2U instance is a glue logic between Synop 15 A P2U instance is a glue logic between Synopsys DesignWare Core PCIe IP's PIPE
18 interface and PHY of HSIO/NVHS/GBE bricks. E !! 16 interface and PHY of HSIO/NVHS bricks. Each P2U instance represents one PCIe
19 PCIe lane. !! 17 lane.
20 18
21 properties: 19 properties:
22 compatible: 20 compatible:
23 enum: !! 21 const: nvidia,tegra194-p2u
24 - nvidia,tegra194-p2u <<
25 - nvidia,tegra234-p2u <<
26 22
27 reg: 23 reg:
28 maxItems: 1 24 maxItems: 1
29 description: Should be the physical addres 25 description: Should be the physical address space and length of respective each P2U instance.
30 26
31 reg-names: 27 reg-names:
32 items: 28 items:
33 - const: ctl 29 - const: ctl
34 <<
35 nvidia,skip-sz-protect-en: <<
36 description: Should be present if two PCIe <<
37 the root port and its immediate downstre <<
38 type: boolean <<
39 30
40 '#phy-cells': 31 '#phy-cells':
41 const: 0 32 const: 0
42 33
43 additionalProperties: false 34 additionalProperties: false
44 35
45 examples: 36 examples:
46 - | 37 - |
47 p2u_hsio_0: phy@3e10000 { 38 p2u_hsio_0: phy@3e10000 {
48 compatible = "nvidia,tegra194-p2u"; 39 compatible = "nvidia,tegra194-p2u";
49 reg = <0x03e10000 0x10000>; 40 reg = <0x03e10000 0x10000>;
50 reg-names = "ctl"; 41 reg-names = "ctl";
51 42
52 #phy-cells = <0>; 43 #phy-cells = <0>;
53 }; 44 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.