USB interrupt check detection

[ajita02]

Hi all,

I am using IMX8MM platform as slave USB device. I want to implement parallel ISR on USB detection interrupt. When USB is connected with host, slave USB driver would have generated some software interrupt. I want to use that interrupt as indication to top user application using custom ISR on it. I can see below interrupt in `/proc/interrupt`.

` 58: 0 0 0 0 GICv3 72 Level 32e40000.usb` 

Please help me to achieve this.

Thanks,

Ajita

[Dhruvit]

Hi @ajita02,

I hope you are doing well.

For the information related to the interrupt over USB detection, kindly refer to section 11.1.2.4 Interrupts from the reference manual IMX8MMRM

Please refer to the Interrupt Enable Register and USB Status register for more details.

Thanks & Regards,

Dhruvit Vasavada

[ajita02]

Hi @Dhruvit ,

Thank you for your reply. I will take a look and update you.

Regards,

Ajita

[ajita02 · Accepted solution]

Hi @Dhruvit ,

I found a solution. `udevadm` is useful to get device driver's events. Just need to add a rule and run script when event occur. 

Thanks for your help.

Ajita

[ajita02]

@Rita_Wang @asim_zaidi @weidong_sun @riteshmpatel 

Please provide a lead.