The xHCI controller firmware and the Lenovo g505s you mention are AMD-specific stuff, which does not apply to the Intel chipset on the Thinkpad T530 (it should work out-of-the-box).
Hi Angel, I completely agree with you and of course understand that g505s info is not appropriate for t530 situation . By this + wifi ath9k example I just meant there are some controllers which don't need the non-free closed source firmware to do something
Best regards, Ivan