Question, i.MX6Q IRQ handling(Linux)

SLICE — Sun, 29 Oct 2017 23:26:03 GMT

Dear team,

I would like to ask about IRQ of i.MX6 on Linux.

Now my customer is using GPIO (GPIO(1,30)) of i.MX6Q as IRQ input on Linux(3.14.28).

And they saw IRQ#190 is used for that. They found that from the result of issuing “cat /proc/interrupts” command.

Because they want to assign the IRQ#190 into other CPU core, CPU-1, they issued “echo 2> /proc/irq/190/smp_affinity”.

Then error occurred as below.

-sh : echo : write error : Input/output error

They feel the IRQ#190 might be incorrect.

Please show me how to assign the IRQ to other CPU core.

And please show us how to change the priority of IRQ also.

Thanks,

Miyamoto

Re: Question, i.MX6Q IRQ handling(Linux)

SLICE — Wed, 01 Nov 2017 07:51:19 GMT

Dear team,

My customer found the actual IRQ# on the Linux kernel 3.14.28.

The IRQ from GPIO1_30 is assigned to #99.

So, we can close this.

Thanks,

Miyamoto