Power off rail#2 of INA3221 on I2C address 0x40

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Since I’m not using Broadcom WiFi MMC card in TX2 module, I’d like to power it completely off. It’s exposed via INA3221 power monitor on I2C address 0x40, i.e.:

root@tx2:/sys/bus/i2c/drivers/ina3221x/0-0040/iio:device0# cat /sys/bus/i2c/drivers/ina3221x/0-0040/iio:device0/rail_name_2
VDD_4V0_WIFI

root@tx2:/sys/bus/i2c/drivers/ina3221x/0-0040/iio:device0# cat /sys/bus/i2c/drivers/ina3221x/0-0040/iio:device0/in_voltage2_input
4800

Is there any way to power it off completely via procfs interface or otherwise? Please let me know.

-albertr

2

Hi, WiFi module is in power off mode if not be enabled and it shares several system power rails with other devices which can not be powered off, so no need to do anything to disable it.