gpio-keys with PI2 = superlag

Autonomous Machines Jetson & Embedded Systems Jetson TX1
1

I’m trying to configure a push button on running on port I 2 (gpio 66 in linux). The gpio key registers correctly but when I press or release the button it takes circa 1 second to register the two interrupts. I put a small printk in the driver isr to verify it was not lagging somewhere else.
Oddly enough I have two other keys on H 6 and B 2 which work perfectly - also with the printk the interrupt routine fires instantly, whereas with I 2 it just lags.

I’m running kernel 4.4 on 24.2, but unfortunately right now upgrading is not an option.

Thanks!

2

Hi,

Can you share the changes you made?

thanks
Bibek

3

Hi,

We are not seeing any lag on I.02 pin which is coming from M.2 key E connector (J18) on the CVB.
Though our local setup has kernel-4.9 version with rel-32.
Checked on Jetson-TX1.

As you have mentioned, upgrading kernel is not an option for you now, I would see the change which you have made locally. Please share your changes.

Thanks & Regards,
Sandipan