tree 290d8ac2e6af1f39d101f62f749e8e61e389d69f
parent cb091801fc0a6bfb11b032461f1e216a6dd25e05
author Shawn McCarney <shawnmm@us.ibm.com> 1619115668 -0500
committer Shawn McCarney <shawnmm@us.ibm.com> 1619550372 +0000

regulators: Create DBusSensor class

Create the DBusSensor class that represents a voltage regulator sensor
on D-Bus.

Each voltage rail in the system may provide multiple types of sensor
data, such as temperature, output voltage, and output current.  A
DBusSensor tracks one of these data types for a voltage rail.

Class supports the following sensor operations:
* Create sensor
* Set sensor value
* Disable sensor (when system is powered off)
* Set sensor to error state (when unable to read value due to I2C error)
* Delete sensor

Note: A different class will implement the ObjectManager interface for
all voltage regulator sensors.  That will be in a future commit.

Tested:
* Created a sensor of each supported type (vout, iout, etc.)
* Set the value of a sensor
  * Tested update policies: hysteresis, highest, lowest
* Disabled a sensor
* Set a sensor to the error state
* Verified all D-Bus signals emitted
  * InterfacesAdded signal emitted with all info when sensor created
  * PropertiesChanged signal emitted when sensor properties change
  * InterfacesRemoved signal emitted when sensor deleted
* See https://gist.github.com/smccarney/5ae989da1977162ae1a21c208d5302fc
  for complete test plan.

Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>
Change-Id: I655277e6bf0a31a8778a54e87d5864f9951b045e