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... 184