tree 37ea32b5279dfcc3074c580d2556bb6708ebade1
parent ab73001a784c80b2e6bd59e21607e7849d0e7983
author Shawn McCarney <shawnmm@us.ibm.com> 1719501251 -0500
committer Shawn McCarney <shawnmm@us.ibm.com> 1719502424 -0500

pseq: Check STATUS_VOUT first to find pgood fault

Enhance the support for finding the correct voltage rail when a pgood
fault occurs.

First check the PMBus STATUS_VOUT register for all rails.  Check the
rails in power-on-sequence order.

Checking STATUS_VOUT is usually the most accurate method.  For example,
if a pgood fault occurs, the power sequencer device may automatically
shut off related rails.  Ideally the device will only set fault bits in
STATUS_VOUT for the rail with the pgood fault.  However, all the related
rails will likely appear to be faulted by the other methods.

If no fault is found by checking STATUS_VOUT, then check the GPIOs and
output voltage for all rails.  Check the rails in power-on-sequence
order.

Tested:
* Verified all automated test cases run successfully.

Change-Id: Ida8732db573013f1b72edac8ed54e3cfc38da146
Signed-off-by: Shawn McCarney <shawnmm@us.ibm.com>