USB2_REGEN_CG_CTRL
val = readl(usb2_base + USB2_REGEN_CG_CTRL) | USB2_REGEN_CG_CTRL_UPHY_WEN;
writel(val, usb2_base + USB2_REGEN_CG_CTRL);
writel(val & ~USB2_REGEN_CG_CTRL_UPHY_WEN, usb2_base + USB2_REGEN_CG_CTRL);