npM1300 PMIC Init Fail if set CONFIG_PM_DEVICE_RUNTIME=y.

[John]

We follow the youtube video: www.youtube.com/watch

to add battery charging and fuel gauging to our nRF52832 Series project.

It works, but after we enable 

CONFIG_PM_DEVICE=y

CONFIG_PM_DEVICE_RUNTIME=y

at prj.conf, we found it fail to init the npM1300 PMIC and so the battery charging and fuel gauging feature not working.

After we do some investitageion, we found the root cause is by CONFIG_PM_DEVICE_RUNTIME=y.

if CONFIG_PM_DEVICE_RUNTIME=y,  the I2C bus will be interupted and cause npM1300 PMIC init fail.

It is expected? How to fix this issue?

The NCS SDK we using is 2.9.2 and the Toolchain is also 2.9.2.

[Kazi Afroza Sultana]

Hello,

''if CONFIG_PM_DEVICE_RUNTIME=y,  the I2C bus will be interrupted and cause npM1300 PMIC init fail.

It is expected. How to fix this issue''

 

What types of build error you got? 

I have tried to build the fuel_gauge sample (NCS version 3.01.1) on my nrf52 DK ( its a bit older version. 1.2.1) by setting the  CONFIG_PM_DEVICE_RUNTIME=y. and I can see it works the way it should be. After some time I get ''could not read from charger device error''. Upon resetting the chip it can read from charger device. 

I will check on v2.9.2 also. Currently I dn't have it downloaded.

I will get back to you soon.

[John]

Hi, pls see my above log for PMIC npm1300  i2c read/write error when boot up and when CONFIG_PM_DEVICE_RUNTIME=y.

[JerrieJVazquez]

John said:

Hi, pls see my above log for PMIC npm1300  i2c read/write error when boot up and when CONFIG_PM_DEVICE_RUNTIME=y.

Thank you for sharing @blocky blast

[Kazi Afroza Sultana]

Hello, 

If the connection is properly done mentioned here nPM1300 and nPM1304: Fuel gauge you should get the result like following screenshot. This is what I got from npm1300 fuel gauge sample (setting this CONFIG_PM_DEVICE_RUNTIME=y).

I think you have a custom device. Have you tried to run default fuel gauge sample from NCS on your device first? 

[John]

hi Kazi, what is the NCS version you using?