xref: /linux/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml (revision cdd30ebb1b9f36159d66f088b61aee264e649d7a) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/phy/fsl,imx8mq-usb-phy.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Freescale i.MX8MQ USB3 PHY
8
9maintainers:
10  - Li Jun <jun.li@nxp.com>
11
12properties:
13  compatible:
14    oneOf:
15      - enum:
16          - fsl,imx8mq-usb-phy
17          - fsl,imx8mp-usb-phy
18      - items:
19          - const: fsl,imx95-usb-phy
20          - const: fsl,imx8mp-usb-phy
21
22  reg:
23    minItems: 1
24    maxItems: 2
25
26  "#phy-cells":
27    const: 0
28
29  clocks:
30    maxItems: 1
31
32  clock-names:
33    items:
34      - const: phy
35
36  power-domains:
37    maxItems: 1
38
39  vbus-supply:
40    description:
41      A phandle to the regulator for USB VBUS.
42
43  fsl,phy-tx-vref-tune-percent:
44    description:
45      Tunes the HS DC level relative to the nominal level
46    minimum: 94
47    maximum: 124
48
49  fsl,phy-tx-rise-tune-percent:
50    description:
51      Adjusts the rise/fall time duration of the HS waveform relative to
52      its nominal value
53    minimum: 97
54    maximum: 103
55
56  fsl,phy-tx-preemp-amp-tune-microamp:
57    description:
58      Adjust amount of current sourced to DPn and DMn after a J-to-K
59      or K-to-J transition. Default is 0 (disabled).
60    minimum: 0
61    maximum: 1800
62
63  fsl,phy-tx-vboost-level-microvolt:
64    description:
65      Adjust the boosted transmit launch pk-pk differential amplitude
66    minimum: 880
67    maximum: 1120
68
69  fsl,phy-comp-dis-tune-percent:
70    description:
71      Adjust the voltage level used to detect a disconnect event at the host
72      relative to the nominal value
73    minimum: 91
74    maximum: 115
75
76  fsl,phy-pcs-tx-deemph-3p5db-attenuation-db:
77    description:
78      Adjust TX de-emphasis attenuation in dB at nominal
79      3.5dB point as per USB specification
80    $ref: /schemas/types.yaml#/definitions/uint32
81    minimum: 0
82    maximum: 36
83
84  fsl,phy-pcs-tx-swing-full-percent:
85    description:
86      Scaling of the voltage defined by fsl,phy-tx-vboost-level-microvolt
87    minimum: 0
88    maximum: 100
89
90required:
91  - compatible
92  - reg
93  - "#phy-cells"
94  - clocks
95  - clock-names
96
97allOf:
98  - if:
99      properties:
100        compatible:
101          contains:
102            enum:
103              - fsl,imx95-usb-phy
104    then:
105      properties:
106        reg:
107          items:
108            - description: USB PHY Control range
109            - description: USB PHY TCA Block range
110    else:
111      properties:
112        reg:
113          maxItems: 1
114
115  - if:
116      properties:
117        compatible:
118          contains:
119            enum:
120              - fsl,imx95-usb-phy
121    then:
122      $ref: /schemas/usb/usb-switch.yaml#
123
124unevaluatedProperties: false
125
126examples:
127  - |
128    #include <dt-bindings/clock/imx8mq-clock.h>
129    usb3_phy0: phy@381f0040 {
130        compatible = "fsl,imx8mq-usb-phy";
131        reg = <0x381f0040 0x40>;
132        clocks = <&clk IMX8MQ_CLK_USB1_PHY_ROOT>;
133        clock-names = "phy";
134        #phy-cells = <0>;
135    };
136