Hi Krzysztof, > > + For most Relatek SoCs, one XHCI controller only support one the USB > 2.0 > > + phy. For RTD1395 SoC, the one XHCI controller has two USB 2.0 > PHYs. > > + properties: > > + realtek,page0-param: > > + description: PHY parameter at page 0. The data are the pair of > the > > + offset and value. > > This needs to be specific. What the heck is "PHY parameter"? > It contains more parameters page0 has 16 parameters page1 has 8 parameters page2 has 8 parameters It's tedious if we list them all. And we only set the part that differs from the default. It's hard to explain which parameters were changed because each platform is different. Thanks, Stanley