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,sa8775p-usb-hs-phy 24 - qcom,sc8280xp-usb-hs-phy 25 - const: qcom,usb-snps-hs-5nm-phy 26 - items: 27 - enum: 28 - qcom,qdu1000-usb-hs-phy 29 - qcom,sc7280-usb-hs-phy 30 - qcom,sdx55-usb-hs-phy 31 - qcom,sdx65-usb-hs-phy 32 - qcom,sm6375-usb-hs-phy 33 - qcom,sm8150-usb-hs-phy 34 - qcom,sm8250-usb-hs-phy 35 - qcom,sm8350-usb-hs-phy 36 - qcom,sm8450-usb-hs-phy 37 - const: qcom,usb-snps-hs-7nm-phy 38 39 reg: 40 maxItems: 1 41 42 "#phy-cells": 43 const: 0 44 45 clocks: 46 items: 47 - description: rpmhcc ref clock 48 49 clock-names: 50 items: 51 - const: ref 52 53 resets: 54 items: 55 - description: PHY core reset 56 57 vdda-pll-supply: 58 description: phandle to the regulator VDD supply node. 59 60 vdda18-supply: 61 description: phandle to the regulator 1.8V supply node. 62 63 vdda33-supply: 64 description: phandle to the regulator 3.3V supply node. 65 66 qcom,hs-disconnect-bp: 67 description: 68 This adjusts the voltage level for the threshold used to 69 detect a disconnect event at the host. 70 The hardware accepts only discrete values. The value closest to the 71 provided input will be chosen as the override value for this param. 72 minimum: -272 73 maximum: 2156 74 75 qcom,squelch-detector-bp: 76 description: 77 This adjusts the voltage level for the threshold used to 78 detect valid high-speed data. 79 The hardware accepts only discrete values. The value closest to the 80 provided input will be chosen as the override value for this param. 81 minimum: -2090 82 maximum: 1590 83 84 qcom,hs-amplitude-bp: 85 description: 86 This adjusts the high-speed DC level voltage. 87 The hardware accepts only discrete values. The value closest to the 88 provided input will be chosen as the override value for this param. 89 minimum: -660 90 maximum: 2670 91 92 qcom,pre-emphasis-duration-bp: 93 description: 94 This signal controls the duration for which the 95 HS pre-emphasis current is sourced onto DP<#> or DM<#>. 96 The HS Transmitter pre-emphasis duration is defined in terms of 97 unit amounts. One unit of pre-emphasis duration is approximately 98 650 ps and is defined as 1X pre-emphasis duration. 99 The hardware accepts only discrete values. The value closest to the 100 provided input will be chosen as the override value for this param. 101 minimum: 10000 102 maximum: 20000 103 104 qcom,pre-emphasis-amplitude-bp: 105 description: 106 This signal controls the amount of current sourced to 107 DP<#> and DM<#> after a J-to-K or K-to-J transition. 108 The HS Transmitter pre-emphasis current is defined in terms of unit 109 amounts. One unit amount is approximately 2 mA and is defined as 110 1X pre-emphasis current. 111 The hardware accepts only discrete values. The value closest to the 112 provided input will be chosen as the override value for this param. 113 minimum: 10000 114 maximum: 40000 115 116 qcom,hs-rise-fall-time-bp: 117 description: 118 This adjusts the rise/fall times of the high-speed waveform. 119 The hardware accepts only discrete values. The value closest to the 120 provided input will be chosen as the override value for this param. 121 minimum: -4100 122 maximum: 5430 123 124 qcom,hs-crossover-voltage-microvolt: 125 description: 126 This adjusts the voltage at which the DP<#> and DM<#> 127 signals cross while transmitting in HS mode. 128 The hardware accepts only discrete values. The value closest to the 129 provided input will be chosen as the override value for this param. 130 minimum: -31000 131 maximum: 28000 132 133 qcom,hs-output-impedance-micro-ohms: 134 description: 135 In some applications, there can be significant series resistance 136 on the D+ and D- paths between the transceiver and cable. This adjusts 137 the driver source impedance to compensate for added series 138 resistance on the USB. The hardware accepts only discrete values. The 139 value closest to the provided input will be chosen as the override value 140 for this param. 141 minimum: -2300000 142 maximum: 6100000 143 144 qcom,ls-fs-output-impedance-bp: 145 description: 146 This adjusts the low- and full-speed single-ended source 147 impedance while driving high. The following adjustment values are based 148 on nominal process, voltage, and temperature. 149 The hardware accepts only discrete values. The value closest to the 150 provided input will be chosen as the override value for this param. 151 minimum: -1053 152 maximum: 1310 153 154required: 155 - compatible 156 - reg 157 - "#phy-cells" 158 - clocks 159 - clock-names 160 - resets 161 - vdda-pll-supply 162 - vdda18-supply 163 - vdda33-supply 164 165additionalProperties: false 166 167examples: 168 - | 169 #include <dt-bindings/clock/qcom,rpmh.h> 170 #include <dt-bindings/clock/qcom,gcc-sm8150.h> 171 phy@88e2000 { 172 compatible = "qcom,sm8150-usb-hs-phy", "qcom,usb-snps-hs-7nm-phy"; 173 reg = <0x088e2000 0x400>; 174 #phy-cells = <0>; 175 176 clocks = <&rpmhcc RPMH_CXO_CLK>; 177 clock-names = "ref"; 178 179 resets = <&gcc GCC_QUSB2PHY_PRIM_BCR>; 180 181 vdda-pll-supply = <&vdd_usb_hs_core>; 182 vdda33-supply = <&vdda_usb_hs_3p1>; 183 vdda18-supply = <&vdda_usb_hs_1p8>; 184 }; 185... 186