tree 495f7541187e09f1fd094d3d95ae0fb12be8f25e
parent 275f7c39190bab69efa11218b68587e8955cc588
author Xiaochao Ma <maxiaochao@inspur.com> 1655801667 +0800
committer Zhikui Ren <zhikui.ren@intel.com> 1733421704 +0000

Enable GPIO polling for fans that dont support GPIO events

This commit will enable the use of GPIO polling for fans that do not
support GPIO events for presence detection.

The configuration should specify the MonitoryType of Polling which will
trigger the polling based presence monitoring.

Preconditions:
Add the configuration of the dual rotor fan in xxx_BaseBoard.json,
for example:
```
{
    "Address": "0x52",
    "Bus": 6,
    "Index": 0,
    "MaxReading": 14500,
    "Name": "Fan1a_in",
    "PowerState": "Always",
    "Presence": {
      "PinName": "FAN0_PRESENCE_R_N",
      "Polarity": "Low",
      "MonitorType": "Polling"
    },
    "Type": "I2CFan"
},
{
    "Address": "0x52",
    "Bus": 6,
    "Index": 1,
    "MaxReading": 14500,
    "Name": "Fan1b_in",
    "PowerState": "Always",
    "Presence": {
      "PinName": "FAN0_PRESENCE_R_N",
      "Polarity": "Low"
      "MonitorType": "Polling"
    },
    "Type": "I2CFan"
},
```

Tested

```
a{sv} 2 "PrettyName" s "" "Present" b true
a{sv} 2 "PrettyName" s "" "Present" b true

(unplug dual rotor fan)

a{sv} 2 "PrettyName" s "" "Present" b false
a{sv} 2 "PrettyName" s "" "Present" b false

(journal)
Feb 27 17:26:17 system1 fansensor[350]: Fan Fan1a_in Removed
Feb 27 17:35:47 system1 fansensor[350]: Fan Fan1a_in Inserted

Signed-off-by: Xiaochao Ma <maxiaochao@ieisystem.com>
Change-Id: I15215e6e919fabc8b362016c9bb8a5bfaea842db
Signed-off-by: Chris Cain <cjcain@us.ibm.com>