tree f9c3c8b7cb305b49d413d4287e533e3f0e96ec53
parent 3cd2b407131b5f0111c3a1c50383f34f84f6f27f
author Shawn McCarney <shawnmm@us.ibm.com> 1612505313 -0600
committer Shawn McCarney <shawnmm@us.ibm.com> 1612562134 -0600

regulators: Add VPD service

The regulators application needs to obtain VPD (Vital Product Data)
keyword values.

Sometimes regulator configuration and monitoring varies depending on
hardware type or version.  VPD keyword values can provide this
information about the hardware.

Add a new class to obtain hardware VPD from the D-Bus
xyz.openbmc_project.Inventory.Decorator.Asset interface.

Also define an abstract base class and a mock implementation to
enable use of gmock in test cases related to VPD.

Tested:
* Verified VPD values were successfully obtained from D-Bus.
* Verified VPD values were cached.
* Tested where object path was invalid.
* Tested where keyword was invalid.
* Verified cached VPD values were cleared when machine powered on.
* For the complete test plan, see
  https://gist.github.com/smccarney/519a54353361e28b1d25f5783c15f471

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: Id08e8bca8db6421d46669c495e8a9432e45a1fd6