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.