src/mainboard/lenovo/t520/variants/w520/overridetree.cb - coreboot - Gitiles

 chip northbridge/intel/sandybridge
 	register "spd_addresses" = "{0x50, 0x52, 0x51, 0x53}"
 	device domain 0 on
 		chip southbridge/intel/bd82x6x # Intel Series 6 Cougar Point PCH
 			device ref pcie_rp7 on end # USB 3.0
 		end
 	end
 end
	chip northbridge/intel/sandybridge
	register "spd_addresses" = "{0x50, 0x52, 0x51, 0x53}"
	device domain 0 on
	chip southbridge/intel/bd82x6x # Intel Series 6 Cougar Point PCH
	device ref pcie_rp7 on end # USB 3.0
	end
	end
	end