I2C sensor LM75 does not show on D-Bus and WebUI

[LukeKungCJ]

Hi all,

I'm trying to add an LM75 temp sensor based on Romulus and run on the AST2500 EVB board, but I met some issues as follows:

1. The default sensor w83773g does not show on the D-Bus and WebUI.
Based on my understanding (may be wrong), even the w83773g does not physically exist, it should still be created on D-Bus and WebUI but it's not.
BTW, I have not modified any code and recipe, but only modified the kernel DTS from NCSI to dedicate LAN.
Finally, I tried QEMU but it shows the same issue.

2. I try to add an LM75 sensor which is physically existing on the EVB board but it does not show on the D-Bus and WebUI.
This time I modify the I2C part of DTS and successfully create an LM75 sensor and could read the value by the following path:

/sys/bus/i2c/drivers/lm75/7-004d/hwmon/hwmon1/temp1_input

And could also see the following path has been created:

/sys/firmware/devicetree/base/ahb/apb/bus@1e78a000/i2c-bus@1c0/lm75@4d

And the boot-up message shows as follows:

[ 2.246388] w83773g 12-004c: error writing config rate register
[ 2.256768] lm75 7-004d: hwmon1: sensor 'lm75'

I think the driver part is ok, but when I run busctl | grep Hwmon, there is still only ADC and TACH shows on the D-Bus and without LM75:

Also, the phosphor-hwmon-readd only monitor ADC and TACH without LM75:

For file phosphor-hwmon_%.bbappend, I only add one lm75 line.

   CHIPS = " \
   bus@1e78a000/i2c-bus@440/w83773g@4c \
   bus@1e78a000/i2c-bus@1c0/lm75@4d \
   pwm-tacho-controller@1e786000 \
   "

Any help would be really appreciated.

[yty2023]

@LukeKungCJ Hi, i'm a rookie for openbmc, i met the same problem on qemu, may i know how you solve this problem?