tree 4e8c80a9681cfd5d2417a05d07ca6852443529e4
parent bf241c692180037efdb832e00b8e9d9823043111
author Yikai Tsai <yikai.tsai.wiwynn@gmail.com> 1721717074 +0800
committer Patrick Williams <patrick@stwcx.xyz> 1721998646 +0000

meta-facebook: yosemite4: HSC fault event

Summary:
The system shall register an event in response to an HSC fault.
BMC monitors Medusa HSC fault pin (FLT_HSC_SERVER_SLOTx_N)
on spider board CPLD IO expander.
Check power fault reason via I2C to HSC STATUS_WORD (0x79).

Test Plan:
Trigger HSC OTP fault by setting lower OT_FAULT_LIMIT (0x4F)
to pull FLT_HSC_SERVER_SLOTx_N low.

Testing:
Take FLT_HSC_SERVER_SLOT7_N for example.

1. Check init status
root@bmc:~# cat /sys/kernel/debug/gpio | grep -i FLT_HSC_SERVER_SLOT7
 gpio-698 (FLT_HSC_SERVER_SLOT7|gpio_monitor        ) in  hi IRQ
root@bmc:~# i2ctransfer -f -y 6 w1@0x40 0x79 r2
0x00 0x00
root@bmc:~# i2ctransfer -f -y 6 w1@0x40 0x4f r2
0xff 0x0f

2. Trigger HSC OTP fault
root@bmc:~# i2ctransfer -f -y 6 w3@0x40 0x4f 0x02 0x1
root@bmc:~# i2ctransfer -f -y 6 w1@0x40 0x4f r2
0x02 0x01
root@bmc:~# i2ctransfer -f -y 6 w1@0x40 0x79 r2
0x45 0x18
root@bmc:~# cat /sys/kernel/debug/gpio | grep -i FLT_HSC_SERVER_SLOT7
 gpio-698 (FLT_HSC_SERVER_SLOT7|gpio_monitor        ) in  lo IRQ

3. Check event log
root@bmc:~# mfg-tool log-display
...
    },
    "97": {
        "additional_data": [
            "STATUS_WORD=0x1845"
        ],
        "event_id": "",
        "message": "SLOT7 HSC Fault",
        "resolution": "",
        "resolved": false,
        "severity": "xyz.openbmc_project.Logging.Entry.Level.Error",
        "timestamp": "2024-07-17T02:21:30.707000000Z",
        "updated_timestamp": "2024-07-17T02:21:30.707000000Z"
    },

Change-Id: I88bac394a174165d91b471db25c0e43ccc744eec
Signed-off-by: Yikai Tsai <yikai.tsai.wiwynn@gmail.com>