tree ad96c4824b29c132caa89b56b97898974a0bdeee
parent bd4b86d3982cd5592e0417a5e45be6d3083f4c81
author Lei YU <mine260309@gmail.com> 1567065750 +0800
committer Lei YU <mine260309@gmail.com> 1571712273 +0800

Add power-utils

The power-utils is added to support psu code manager as vendor-specifc
tool.
In this commit, the util returns the PSU version based on the PSU
inventory path, where the inventory path are mapped to the PSU sysfs
device directory based on a json config.

Tested: Verify the version is returned correctly on Witherspoon:
           $ ./psutils --getversion \
           /xyz/openbmc_project/inventory/system/chassis/motherboard/powersupply0
           01100110
        And it returns non-zero when it fails to get the version without
        throwing exception.

Signed-off-by: Lei YU <mine260309@gmail.com>
Change-Id: Ib60f3aa50ce581d55fe4cd62642f30398e25be83