USB Voltage override

Product support balenaOS
#1

We have a custom board that has a built in USB peripheral. By design, this USB peripheral is powered external from our SoC (a Variscite Dart IMX8M Mini ) through a chip level hub.

The USB port works great, but the OS is rejecting the device because it thinks it can’t supply the requested bus power.

[  794.115495] usb 1-1.1: new high-speed USB device number 5 using ci_hdrc
[  794.241204] usb 1-1.1: rejected 1 configuration due to insufficient available bus power
[  794.247985] usb 1-1.1: no configuration chosen from 1 choice

Overriding the bus power warning works as we expected it would using
echo 1 > /sys/bus/usb/devices/1-1.1/bConfigurationValue

The question is, how can we either make this persistent or is there a recommended way to perform this at startup?

Thanks,

Aaron

#3

Hello @anathan84 we pinged our devices team to see if they can help you.

Meanwhile if you succeed in anyway to make it work, just let us know.

Let’s stay connected

#5

Well it’s ugly but we have one if our applications scan for the modem being present and then set the USB voltage override via dbus.

Would be happy to have a more legitimate solution.

#6

Hello @anathan84 apologizes for the long delay!

did you solve your issue with the USB voltage override?