tjh.dev
Linux kernel mirror (for testing)
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1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/phy/qcom,usb-snps-femto-v2.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Qualcomm Synopsys Femto High-Speed USB PHY V2
8
9maintainers:
10 - Wesley Cheng <quic_wcheng@quicinc.com>
11
12description: |
13 Qualcomm High-Speed USB PHY
14
15properties:
16 compatible:
17 oneOf:
18 - enum:
19 - qcom,sc8180x-usb-hs-phy
20 - qcom,usb-snps-femto-v2-phy
21 - items:
22 - enum:
23 - qcom,sc8280xp-usb-hs-phy
24 - const: qcom,usb-snps-hs-5nm-phy
25 - items:
26 - enum:
27 - qcom,sc7280-usb-hs-phy
28 - qcom,sdx55-usb-hs-phy
29 - qcom,sdx65-usb-hs-phy
30 - qcom,sm6375-usb-hs-phy
31 - qcom,sm8150-usb-hs-phy
32 - qcom,sm8250-usb-hs-phy
33 - qcom,sm8350-usb-hs-phy
34 - qcom,sm8450-usb-hs-phy
35 - const: qcom,usb-snps-hs-7nm-phy
36
37 reg:
38 maxItems: 1
39
40 "#phy-cells":
41 const: 0
42
43 clocks:
44 items:
45 - description: rpmhcc ref clock
46
47 clock-names:
48 items:
49 - const: ref
50
51 resets:
52 items:
53 - description: PHY core reset
54
55 vdda-pll-supply:
56 description: phandle to the regulator VDD supply node.
57
58 vdda18-supply:
59 description: phandle to the regulator 1.8V supply node.
60
61 vdda33-supply:
62 description: phandle to the regulator 3.3V supply node.
63
64 qcom,hs-disconnect-bp:
65 description:
66 This adjusts the voltage level for the threshold used to
67 detect a disconnect event at the host.
68 The hardware accepts only discrete values. The value closest to the
69 provided input will be chosen as the override value for this param.
70 minimum: -272
71 maximum: 2156
72
73 qcom,squelch-detector-bp:
74 description:
75 This adjusts the voltage level for the threshold used to
76 detect valid high-speed data.
77 The hardware accepts only discrete values. The value closest to the
78 provided input will be chosen as the override value for this param.
79 minimum: -2090
80 maximum: 1590
81
82 qcom,hs-amplitude-bp:
83 description:
84 This adjusts the high-speed DC level voltage.
85 The hardware accepts only discrete values. The value closest to the
86 provided input will be chosen as the override value for this param.
87 minimum: -660
88 maximum: 2670
89
90 qcom,pre-emphasis-duration-bp:
91 description:
92 This signal controls the duration for which the
93 HS pre-emphasis current is sourced onto DP<#> or DM<#>.
94 The HS Transmitter pre-emphasis duration is defined in terms of
95 unit amounts. One unit of pre-emphasis duration is approximately
96 650 ps and is defined as 1X pre-emphasis duration.
97 The hardware accepts only discrete values. The value closest to the
98 provided input will be chosen as the override value for this param.
99 minimum: 10000
100 maximum: 20000
101
102 qcom,pre-emphasis-amplitude-bp:
103 description:
104 This signal controls the amount of current sourced to
105 DP<#> and DM<#> after a J-to-K or K-to-J transition.
106 The HS Transmitter pre-emphasis current is defined in terms of unit
107 amounts. One unit amount is approximately 2 mA and is defined as
108 1X pre-emphasis current.
109 The hardware accepts only discrete values. The value closest to the
110 provided input will be chosen as the override value for this param.
111 minimum: 10000
112 maximum: 40000
113
114 qcom,hs-rise-fall-time-bp:
115 description:
116 This adjusts the rise/fall times of the high-speed waveform.
117 The hardware accepts only discrete values. The value closest to the
118 provided input will be chosen as the override value for this param.
119 minimum: -4100
120 maximum: 5430
121
122 qcom,hs-crossover-voltage-microvolt:
123 description:
124 This adjusts the voltage at which the DP<#> and DM<#>
125 signals cross while transmitting in HS mode.
126 The hardware accepts only discrete values. The value closest to the
127 provided input will be chosen as the override value for this param.
128 minimum: -31000
129 maximum: 28000
130
131 qcom,hs-output-impedance-micro-ohms:
132 description:
133 In some applications, there can be significant series resistance
134 on the D+ and D- paths between the transceiver and cable. This adjusts
135 the driver source impedance to compensate for added series
136 resistance on the USB. The hardware accepts only discrete values. The
137 value closest to the provided input will be chosen as the override value
138 for this param.
139 minimum: -2300000
140 maximum: 6100000
141
142 qcom,ls-fs-output-impedance-bp:
143 description:
144 This adjusts the low- and full-speed single-ended source
145 impedance while driving high. The following adjustment values are based
146 on nominal process, voltage, and temperature.
147 The hardware accepts only discrete values. The value closest to the
148 provided input will be chosen as the override value for this param.
149 minimum: -1053
150 maximum: 1310
151
152required:
153 - compatible
154 - reg
155 - "#phy-cells"
156 - clocks
157 - clock-names
158 - resets
159 - vdda-pll-supply
160 - vdda18-supply
161 - vdda33-supply
162
163additionalProperties: false
164
165examples:
166 - |
167 #include <dt-bindings/clock/qcom,rpmh.h>
168 #include <dt-bindings/clock/qcom,gcc-sm8150.h>
169 phy@88e2000 {
170 compatible = "qcom,sm8150-usb-hs-phy", "qcom,usb-snps-hs-7nm-phy";
171 reg = <0x088e2000 0x400>;
172 #phy-cells = <0>;
173
174 clocks = <&rpmhcc RPMH_CXO_CLK>;
175 clock-names = "ref";
176
177 resets = <&gcc GCC_QUSB2PHY_PRIM_BCR>;
178
179 vdda-pll-supply = <&vdd_usb_hs_core>;
180 vdda33-supply = <&vdda_usb_hs_3p1>;
181 vdda18-supply = <&vdda_usb_hs_1p8>;
182 };
183...