Make sure tlbmc sensors are dynamic
Certain sensors can be deleted, e.g., PSU sensors, then recreated when the power gets resumed. tlbmc used to keep the sensor unchanged, which results in stale input file descriptor.
This commit adds a temporary solution to recreate input device when old device returns "not found". An ideal solution is using IPC to track host power or integrate host power (GPIO monitoring) into tlbmc, which is a goal in the next iteration.
Also add sensor device path into the Redfish error message for debuggability.
On real machine,
```
# device rejoin
root@dddhh9-nfd01:~# echo adm1272 > /sys/bus/i2c/devices/i2c-30/new_device 0x1f
root@dddhh9-nfd01:~# ls /sys/bus/i2c/devices/i2c-30/30-001f/
driver hwmon modalias name power subsystem uevent
root@dddhh9-nfd01:~# ls /sys/bus/i2c/devices/i2c-30/30-001f/hwmon/
hwmon9
root@dddhh9-nfd01:~# ls /sys/bus/i2c/devices/i2c-30/30-001f/hwmon/hwmon9/
curr1_highest in1_highest in2_highest in_samples power1_max temp1_max
curr1_input in1_input in2_input name power1_reset_history temp1_max_alarm
curr1_label in1_label in2_label of_node power_samples temp1_reset_history
curr1_max in1_max in2_max power subsystem uevent
curr1_max_alarm in1_max_alarm in2_max_alarm power1_alarm temp1_crit
curr1_reset_history in1_min in2_min power1_input temp1_crit_alarm
curr_samples in1_min_alarm in2_min_alarm power1_input_highest temp1_highest
device in1_reset_history in2_reset_history power1_label temp1_input
```
Before this change,
```
root@dddhh9-nfd01:~# curl localhost:18080/redfish/v1/Chassis/BigGulp_1/Sensors/power_hotswap_in_Input_Power
{
"error": {
"message": "Failed to read from input device: No such device; input device path: /sys/bus/i2c/devices/i2c-30/30-001f/hwmon/hwmon9/power1_input"
}
```
After this change:
```
root@dddhh9-nfd01:~# curl localhost:18080/redfish/v1/Chassis/BigGulp_1/Sensors/power_hotswap_in_Input_Power
{
"@odata.id": "/redfish/v1/Chassis/BigGulp_1/Sensors/power_hotswap_in_Input_Power",
"@odata.type": "#Sensor.v1_2_0.Sensor",
"Description": "Sensor",
"Id": "power_hotswap_in_Input_Power",
"Name": "hotswap in Input Power",
"Reading": 22.306597,
"ReadingRangeMax": 4700.0,
"ReadingRangeMin": -11.0,
"ReadingType": "Power",
"ReadingUnits": "W",
"RelatedItem": [
{
"@odata.id": "/redfish/v1/Chassis/BigGulp_1"
}
],
"Status": {
"Health": "OK",
"State": "Enabled"
},
"Thresholds": {
"LowerCritical": {
"Reading": -10.0
},
"UpperCritical": {
"Reading": 4600.0
}
}
}
```
PiperOrigin-RevId: 744088791
Change-Id: I92b52d410ba24b9a264963b2e62e5597f21ea96a
1 file changed
