From: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx> Add device tree bindings for SNPS phy tuning parameters. Signed-off-by: Sandeep Maheswaram <quic_c_sanm@xxxxxxxxxxx> Signed-off-by: Krishna Kurapati <quic_kriskura@xxxxxxxxxxx> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- .../bindings/phy/qcom,usb-snps-femto-v2.yaml | 88 ++++++++++++++++++++++ 1 file changed, 88 insertions(+) diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml index 7a0e6a9..565ce5f 100644 --- a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml +++ b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml @@ -53,6 +53,94 @@ properties: vdda33-supply: description: phandle to the regulator 3.3V supply node. + qcom,hs-disconnect-bp: + description: + This adjusts the voltage level for the threshold used to + detect a disconnect event at the host. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: -272 + maximum: 2156 + + qcom,squelch-detector-bp: + description: + This adjusts the voltage level for the threshold used to + detect valid high-speed data. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: -2090 + maximum: 1590 + + qcom,hs-amplitude-bp: + description: + This adjusts the high-speed DC level voltage. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: -660 + maximum: 2670 + + qcom,pre-emphasis-duration-bp: + description: + This signal controls the duration for which the + HS pre-emphasis current is sourced onto DP<#> or DM<#>. + The HS Transmitter pre-emphasis duration is defined in terms of + unit amounts. One unit of pre-emphasis duration is approximately + 650 ps and is defined as 1X pre-emphasis duration. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: 10000 + maximum: 20000 + + qcom,pre-emphasis-amplitude-bp: + description: + This signal controls the amount of current sourced to + DP<#> and DM<#> after a J-to-K or K-to-J transition. + The HS Transmitter pre-emphasis current is defined in terms of unit + amounts. One unit amount is approximately 2 mA and is defined as + 1X pre-emphasis current. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: 10000 + maximum: 40000 + + qcom,hs-rise-fall-time-bp: + description: + This adjusts the rise/fall times of the high-speed waveform. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: -4100 + maximum: 5430 + + qcom,hs-crossover-voltage-microvolt: + description: + This adjusts the voltage at which the DP<#> and DM<#> + signals cross while transmitting in HS mode. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: -31000 + maximum: 28000 + + qcom,hs-output-impedance-micro-ohms: + description: + In some applications, there can be significant series resistance + on the D+ and D- paths between the transceiver and cable. This adjusts + the driver source impedance to compensate for added series + resistance on the USB. The hardware accepts only discrete values. The + value closest to the provided input will be chosen as the override value + for this param. + minimum: -2300000 + maximum: 6100000 + + qcom,ls-fs-output-impedance-bp: + description: + This adjusts the low- and full-speed single-ended source + impedance while driving high. The following adjustment values are based + on nominal process, voltage, and temperature. + The hardware accepts only discrete values. The value closest to the + provided input will be chosen as the override value for this param. + minimum: -1053 + maximum: 1310 + required: - compatible - reg -- 2.7.4