In one embodiment, an apparatus includes an input/output (I/O) circuit to communicate information at a selected voltage via an interconnect to which a plurality of devices may be coupled, and a host controller to couple to the interconnect. The host controller may include a supply voltage policy control circuit to initiate a supply voltage policy exchange with a first device to obtain a first supply voltage capability of the first device and to cause the I/O circuit and the first device to be configured to communicate via the interconnect at a first supply voltage based on the first supply voltage capability. Other embodiments are described and claimed.