tree c9866395ca2b82deeaaee67aa8d86eda5dd0618e
parent 4398d3cefcae97fc1d2b37eb564c1e9168dac313
author Cindy Liu <hcindyl@google.com> 1596744029 -0700
committer Cindy Liu <hcindyl@google.com> 1596744525 -0700

Add TPU power cycle support

In some cases, TPU loses its USB link after excessive resets. The USB
driver tries to power cycle the port to recover the device, but the
platform driver needs to actually implement the power cycle.

This does not resolve the potential losing link condition during the TPU engine
initialization, but the TPU is recovered back to the DFU mode ready for the
next trial.

Bug: 162766719
Change-Id: If27a56bc8a138f326231a7193fb9b817453ee06e