UHD_PWRON_FACTOR
pwrdly = ((hubdesc20.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
pwrdly = ((hubdesc30.bPwrOn2PwrGood * UHD_PWRON_FACTOR) +
pwrdly = ((10 * UHD_PWRON_FACTOR) + usb_extra_power_up_time);