tree fe49babdcc93e5d1d0e3abadc8d417e2e43c08b4
parent 5ec0f415276fdf31a93ff3767d6b9679aef661f5
author Xo Wang <xow@google.com> 1485558025 -0800
committer Patrick Williams <patrick@stwcx.xyz> 1485978057 +0000

meta-zaius: vcs-control: Add retries for power sequencer commands

For reasons yet fully debugged, PMBus communication with the UCD90160
power sequencer is flaky, with the symptom that some i2c-{get,set}
commands fail or the ucd9000 driver fails to probe.

Add retries in the script that performs these commands as a workaround
to their random failures.

Though this script exits at first error and returns its code, the
systemd services that use it have [Unit] Type=oneshot. So, systemd can
not be configured to restart the script during failures.

Signed-off-by: Xo Wang <xow@google.com>
Change-Id: Ia9eee013001c47ffc9706984b110f312ccdbc175