Linux IRQ prober

This module is inspired from the short.c source code from the Linux Device Driver book.

It helps to find unhandled IRQ using the autoprobe IRQ kernel API, or request a specific IRQ.

How it works:

• If you want to use the autoprobe feature: insmod irq-prober.ko
• You can specify the delay in micro-seconds to use beetween the probe: insmod irq-prober.ko delay=500
• If you want to request a specific IRQ: insmod irq-prober.ko irq=20
• If this IRQ is already handle you can specify it as a share IRQ: insmod irq-prober.ko irq=20 share=1
• If your IRQ is driven by a GPIO: insmod irq-prober.ko gpio=13

Then use dmesg to retrieve the debug output:

Example:

# insmod irq-prober irq=19 share=1
# dmesg | grep irq-prober
irq-prober: IRQ 19 handle successfully