xref: /linux/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0) 
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    enum:
15      - fsl,imx8mq-usb-phy
16      - fsl,imx8mp-usb-phy
17
18  reg:
19    maxItems: 1
20
21  "#phy-cells":
22    const: 0
23
24  clocks:
25    maxItems: 1
26
27  clock-names:
28    items:
29      - const: phy
30
31  power-domains:
32    maxItems: 1
33
34  vbus-supply:
35    description:
36      A phandle to the regulator for USB VBUS.
37
38  fsl,phy-tx-vref-tune-percent:
39    description:
40      Tunes the HS DC level relative to the nominal level
41    minimum: 94
42    maximum: 124
43
44  fsl,phy-tx-rise-tune-percent:
45    description:
46      Adjusts the rise/fall time duration of the HS waveform relative to
47      its nominal value
48    minimum: 97
49    maximum: 103
50
51  fsl,phy-tx-preemp-amp-tune-microamp:
52    description:
53      Adjust amount of current sourced to DPn and DMn after a J-to-K
54      or K-to-J transition. Default is 0 (disabled).
55    minimum: 0
56    maximum: 1800
57
58  fsl,phy-tx-vboost-level-microvolt:
59    description:
60      Adjust the boosted transmit launch pk-pk differential amplitude
61    minimum: 880
62    maximum: 1120
63
64  fsl,phy-comp-dis-tune-percent:
65    description:
66      Adjust the voltage level used to detect a disconnect event at the host
67      relative to the nominal value
68    minimum: 91
69    maximum: 115
70
71  fsl,phy-pcs-tx-deemph-3p5db-attenuation-db:
72    description:
73      Adjust TX de-emphasis attenuation in dB at nominal
74      3.5dB point as per USB specification
75    $ref: /schemas/types.yaml#/definitions/uint32
76    minimum: 0
77    maximum: 36
78
79  fsl,phy-pcs-tx-swing-full-percent:
80    description:
81      Scaling of the voltage defined by fsl,phy-tx-vboost-level-microvolt
82    minimum: 0
83    maximum: 100
84
85required:
86  - compatible
87  - reg
88  - "#phy-cells"
89  - clocks
90  - clock-names
91
92additionalProperties: false
93
94examples:
95  - |
96    #include <dt-bindings/clock/imx8mq-clock.h>
97    usb3_phy0: phy@381f0040 {
98        compatible = "fsl,imx8mq-usb-phy";
99        reg = <0x381f0040 0x40>;
100        clocks = <&clk IMX8MQ_CLK_USB1_PHY_ROOT>;
101        clock-names = "phy";
102        #phy-cells = <0>;
103    };
104