Add needed code to pddf_custom_psu.c to deal with multi PSU and get SN.
How to verify it
Plugin new PSU (3Y) and test,
```
root@sonic:/sys/bus/i2c/drivers/psu/9-0050# cat psu_serial_num
S0A000X601919000013
root@sonic:/sys/bus/i2c/drivers/psu/9-0050# cat psu_model_name
YESM1300AM
root@sonic:/home/admin# pddf_psuutil mfrinfo
PSU Status Manufacturer ID Model Serial Fan Airflow Direction
PSU1 NOT OK 3Y POWER YESM1300AM S0A000X601919000007 exhaust
PSU2 OK 3Y POWER YESM1300AM S0A000X601919000013 exhaust
```
Co-authored-by: Jostar Yang <jostar_yang@accton.com.tw>
Accton util applies lsmod to check if drivers are installed.
But lsmod may return error on startup and skip module installation.
Signed-off-by: Brandon Chuang <brandon_chuang@edge-core.com>
Fix 259 alerts reported by the LGTM tool:
- 245 for Unused import
- 7 for Testing equality to None
- 5 for Duplicate key in dict literal
- 1 for Module is imported more than once
- 1 for Unused local variable
I2c burst read may failed due to misoperation of ir3570a(A DC-to-DC converter IC).
As #2966, there are 3 more models have this symptom, as7326-56x, as7726-32x, and as9716-32d.
Also correct typo of naming on as7816-64x and as7716-32x.
Signed-off-by: roy_lee roy_lee@accton.com
What I did
Disabling i2c function of ir3570a which may failed i2c tranfer to others.
Close channel of mux after data transfered.
How I did it
Identify version of ir3570, if it's ir3570a, disable its alias i2c address.
Enable parameter of driver i2c_mux_pca954x to close channel on after every access.
How to verify it
Write 08 to offset 0xcf of systom eeprom and execute i2c block read.
It will return error.
plug-in several transceivers and run "show interfaces transceiver presence" and "sfputil show presence". You may see the different result. (But doing this requires updated xcvrd).
Signed-off-by: roy_lee <roy_lee@accton.com>
