xref: /linux/Documentation/devicetree/bindings/phy/realtek,usb2phy.yaml (revision 51e7accbe8ab51476fbe55fbb5616c12fb3a0beb) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2# Copyright 2023 Realtek Semiconductor Corporation
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/phy/realtek,usb2phy.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: Realtek DHC SoCs USB 2.0 PHY
9
10maintainers:
11  - Stanley Chang <stanley_chang@realtek.com>
12
13description: |
14  Realtek USB 2.0 PHY support the digital home center (DHC) RTD series SoCs.
15  The USB 2.0 PHY driver is designed to support the XHCI controller. The SoCs
16  support multiple XHCI controllers. One PHY device node maps to one XHCI
17  controller.
18
19  RTD1295/RTD1619 SoCs USB
20  The USB architecture includes three XHCI controllers.
21  Each XHCI maps to one USB 2.0 PHY and map one USB 3.0 PHY on some
22  controllers.
23  XHCI controller#0 -- usb2phy -- phy#0
24                    |- usb3phy -- phy#0
25  XHCI controller#1 -- usb2phy -- phy#0
26  XHCI controller#2 -- usb2phy -- phy#0
27                    |- usb3phy -- phy#0
28
29  RTD1395 SoCs USB
30  The USB architecture includes two XHCI controllers.
31  The controller#0 has one USB 2.0 PHY. The controller#1 includes two USB 2.0
32  PHY.
33  XHCI controller#0 -- usb2phy -- phy#0
34  XHCI controller#1 -- usb2phy -- phy#0
35                               |- phy#1
36
37  RTD1319/RTD1619b SoCs USB
38  The USB architecture includes three XHCI controllers.
39  Each XHCI maps to one USB 2.0 PHY and map one USB 3.0 PHY on controllers#2.
40  XHCI controller#0 -- usb2phy -- phy#0
41  XHCI controller#1 -- usb2phy -- phy#0
42  XHCI controller#2 -- usb2phy -- phy#0
43                    |- usb3phy -- phy#0
44
45  RTD1319d SoCs USB
46  The USB architecture includes three XHCI controllers.
47  Each xhci maps to one USB 2.0 PHY and map one USB 3.0 PHY on controllers#0.
48  XHCI controller#0 -- usb2phy -- phy#0
49                    |- usb3phy -- phy#0
50  XHCI controller#1 -- usb2phy -- phy#0
51  XHCI controller#2 -- usb2phy -- phy#0
52
53  RTD1312c/RTD1315e SoCs USB
54  The USB architecture includes three XHCI controllers.
55  Each XHCI maps to one USB 2.0 PHY.
56  XHCI controller#0 -- usb2phy -- phy#0
57  XHCI controller#1 -- usb2phy -- phy#0
58  XHCI controller#2 -- usb2phy -- phy#0
59
60properties:
61  compatible:
62    enum:
63      - realtek,rtd1295-usb2phy
64      - realtek,rtd1312c-usb2phy
65      - realtek,rtd1315e-usb2phy
66      - realtek,rtd1319-usb2phy
67      - realtek,rtd1319d-usb2phy
68      - realtek,rtd1395-usb2phy
69      - realtek,rtd1395-usb2phy-2port
70      - realtek,rtd1619-usb2phy
71      - realtek,rtd1619b-usb2phy
72
73  reg:
74    items:
75      - description: PHY data registers
76      - description: PHY control registers
77
78  "#phy-cells":
79    const: 0
80
81  nvmem-cells:
82    maxItems: 2
83    description:
84      Phandles to nvmem cell that contains the trimming data.
85      If unspecified, default value is used.
86
87  nvmem-cell-names:
88    items:
89      - const: usb-dc-cal
90      - const: usb-dc-dis
91    description:
92      The following names, which correspond to each nvmem-cells.
93      usb-dc-cal is the driving level for each phy specified via efuse.
94      usb-dc-dis is the disconnection level for each phy specified via efuse.
95
96  realtek,inverse-hstx-sync-clock:
97    description:
98      For one of the phys of RTD1619b SoC, the synchronous clock of the
99      high-speed tx must be inverted.
100    type: boolean
101
102  realtek,driving-level:
103    description:
104      Control the magnitude of High speed Dp/Dm output swing (mV).
105      For a different board or port, the original magnitude maybe not meet
106      the specification. In this situation we can adjust the value to meet
107      the specification.
108    $ref: /schemas/types.yaml#/definitions/uint32
109    default: 8
110    minimum: 0
111    maximum: 31
112
113  realtek,driving-level-compensate:
114    description:
115      For RTD1315e SoC, the driving level can be adjusted by reading the
116      efuse table. This property provides drive compensation.
117      If the magnitude of High speed Dp/Dm output swing still not meet the
118      specification, then we can set this value to meet the specification.
119    $ref: /schemas/types.yaml#/definitions/int32
120    default: 0
121    minimum: -8
122    maximum: 8
123
124  realtek,disconnection-compensate:
125    description:
126      This adjusts the disconnection level compensation for the different
127      boards with different disconnection level.
128    $ref: /schemas/types.yaml#/definitions/int32
129    default: 0
130    minimum: -8
131    maximum: 8
132
133required:
134  - compatible
135  - reg
136  - "#phy-cells"
137
138allOf:
139  - if:
140      not:
141        properties:
142          compatible:
143            contains:
144              enum:
145                - realtek,rtd1619b-usb2phy
146    then:
147      properties:
148        realtek,inverse-hstx-sync-clock: false
149
150  - if:
151      not:
152        properties:
153          compatible:
154            contains:
155              enum:
156                - realtek,rtd1315e-usb2phy
157    then:
158      properties:
159        realtek,driving-level-compensate: false
160
161additionalProperties: false
162
163examples:
164  - |
165    usb-phy@13214 {
166        compatible = "realtek,rtd1619b-usb2phy";
167        reg = <0x13214 0x4>, <0x28280 0x4>;
168        #phy-cells = <0>;
169        nvmem-cells = <&otp_usb_port0_dc_cal>, <&otp_usb_port0_dc_dis>;
170        nvmem-cell-names = "usb-dc-cal", "usb-dc-dis";
171
172        realtek,inverse-hstx-sync-clock;
173        realtek,driving-level = <0xa>;
174        realtek,disconnection-compensate = <(-1)>;
175    };
176