tree 4388b5f3fc437a21acc78d178a45f915c599e32c
parent 5f14cac9767afb99cd2768db2ceb9f6e9342f1fa
author Thang Tran <thuutran@amperecomputing.com> 1733726221 +0700
committer Zhikui Ren <zhikui.ren@intel.com> 1737508861 +0000

adcsensor: prevent reading when power is not ready

Currently, the adcsensor is reading all of the sensors even their power
state is not ready. It made the system waste more resources to read
files.

This commit checks the power state before requesting to read I/O files.
It prevents reading sensors when the power state is not ready.

Tested:
   1. Turn off the power.
      $ipmitool power off
   2. Check the adc sensors that have the "PowerState" property in
      Entity-Manager is "On"/"ChassisOn" via dbus interfaces.
   3. Those sensors have the "Available" property is "false" and the
      "Value" is "nan".
   4. The hwmon files that corresponding to those sensors are not read
   5. Turn on the power.
      $ipmitool power on
   6. Check the adc sensors that have the "PowerState" property in
      Entity-Manager is "On"/"ChassisOn" via dbus interfaces.
   7. Those sensors have the "Available" property is "true" and the
      "Value" is not "nan".

Change-Id: I52219f40fdd3b478425956c176ac40e3e16c10d1
Signed-off-by: Thang Tran <thuutran@amperecomputing.com>