NRF5340 TMP116 power management

[wifiuser]

Hello,

I have a TMP117 attached to I2C1 on a nrf5340 and am using the zephyr NCS v2.0.0 driver to communicate with it. 

How can I configure I2C1 for power management to sleep/suspend to conserve power when not in use given that the initialization gets done by the OS driver code C:\ncs\v2.0.0\zephyr\drivers\sensor\tmp116\tmp116.c. I don't see how to get the PM_DEVICE_DT_DEFINE defined for the driver to be able to call pm_device_action_run on it. Currently my program crashes when that routine is called in 

pm_device_action_run(i2c1_dev, PM_DEVICE_ACTION_SUSPEND)
.
.
.// crashes in this call
    atomic_test_bit(&pm->flags, PM_DEVICE_FLAG_STATE_LOCKED);

 

I see that the PM_DEVICE_DT_DEFINE is set for I2C in TWI and TWIM but not for the TMP116 driver.

grep -r PM_DEVICE_DT_DEFINE /c/ncs/v2.0.0/zephyr/
/c/ncs/v2.0.0/zephyr/drivers/i2c/i2c_nrfx_twi.c: PM_DEVICE_DT_DEFINE(I2C(idx), twi_nrfx_pm_action); \
/c/ncs/v2.0.0/zephyr/drivers/i2c/i2c_nrfx_twim.c: PM_DEVICE_DT_DEFINE(I2C(idx), twim_nrfx_pm_action);

Thank you.

[Sigurd]

Hi,

In what file is atomic_test_bit(&pm->flags, PM_DEVICE_FLAG_STATE_LOCKED); called?

[wifiuser]

In file C:\ncs\v2.0.0\zephyr\subsys\pm\device.c 

pm_device_action_run calls pm_device_state_is_locked which calls atomic_test_bit

atomic_test_bit is defined in C:\ncs\v2.0.0\zephyr\include\zephyr\sys\atomic.h

[Sigurd]

Hi,

 Currently my program crashes when that routine is called

Do you get any log output (from UART or Segger RTT) that gives you more info about the crash? 

[wifiuser]

I switched boards and did a clean build. I am now getting satisfactory results calling pm_device_action_run for I2C1. It seems that it was a hardware issue.