tree b01286a448b77c4bc86c36d1ea075b1c62b51a59
parent 96893a469bb867b45489fc8b3c1ca34ed9ae1c57
author Brandon Wyman <bjwyman@gmail.com> 1636169478 +0000
committer Shawn McCarney <shawnmm@us.ibm.com> 1636993943 +0000

psu-ng: Add in detection of PGOOD fault

If STATUS_WORD has bit 11 high (POWER_GOOD# is inactive) or bit 6 high
(unit is OFF), consider that a PGOOD fault. Lowest priority error to
check, log an error if a power supply has a PGOOD fault, call out the
power supply.

Tested:
    Simulated POWER_GOOD# / OFF and verified error logged.
    Verified normal operations on real hardware do not log error.
    Get power supply in bad state via i2cset commands:
     1. Write 0x19 to 0x02 (ON_OFF_CONFIG, OPERATION command only).
     2. Write 0x00 to 0x01 (Immediate off OPERATION command).
     3. Restart service, error logged for STATUS_WORD = 0x0800.
     4. Write 0x19 to 0x02, 0x00 to 0x01 while powered on.
     5. Error logged for STATUS_WORD=0x0840.

Change-Id: I24dd1db780510d39dc245e76977099f790a2e59e
Signed-off-by: Brandon Wyman <bjwyman@gmail.com>