Linux: Receiving AIF2 timing interrupts in ARM running Linux

christopher scott

Tool/software: Linux

Hi,

I have triggered an AIF2 timer from DSP core0 and receiving AIF2 timing interrupts every 1ms to other DSP's. These AIF2 timer interrupts are also routed to ARM via Chip Interrupt Controller 3 (CIC3) in the hardware architecture. The eight AIF2 timing events are input to the CIC3 on input number 227-234 and the output of which (33 interrupt channels) are routed to ARM interrupt lines (94-126).

I want to write a program on ARM to receive these interrupts in ARM and use ISR to process it. I am running Linux on ARM.

I have searched in TI E2E and Wiki. However, didn't find sufficient information. Please share some idea on how to accomplish this.

It would be very helpful if some example programs are there.

Thank you for the earliest response.

Regards,

Christopher

over 8 years ago

0 Yordan Kovachev over 8 years ago

TI__Guru**** 161600 points

Hi Christopher,

Could you share which device (SoC) is this?

Best Regards,
Yordan

0 christopher scott over 8 years ago in reply to Yordan Kovachev

Prodigy 30 points

Hi Yordan,

I am using C6614 Keystone SoC.

Best Regards,

Christopher

0 Yordan Kovachev over 8 years ago in reply to christopher scott

TI__Guru**** 161600 points

Hi Christopher,

I'm moving this to the device forum. Also I've notified the aif experts. Their feedback will be posted here.

Best Regards,
Yordan

0 Michael Scherban over 8 years ago in reply to Yordan Kovachev

TI__Genius 12320 points

Hi Christopher,

Since you are trying to pick up an irq and run a handler, you'll want to use an insertable kernel module. You will have to use request_irq() to register the interrupt number and the handler.

Regards,

Mike

Processors

Processors forum

Linux: Receiving AIF2 timing interrupts in ARM running Linux