using general IRQs

Hello,

MPC8349 has general IRQ numbered 0-7,
It is required to bind these IRQs with some routine , i.e. they are
not used with any specific driver.

- Should they be configured as gpios in device tree so that we can use
the gpio as irq in linux ? Is there any example ?
- After configuration, can the gpios be used in linux using the
standard /sys/class/gpio ?

Regards,
Ran