Interrupts on GPIO

[Yann Pelletier]

Hi, 
I'd like to add supports for interrupts handling from GPIO controller.  Some of these interrupts are from I2C devices and some others are from SPI devices.

What is the best approach to enable interrupts handling for those devices through GPIO.

Note that I'm developing on a custom board based on mpc8313_rdb using linux 2.6.28.5


Also, 

# cat /proc/interrupts
           CPU0       
 16:         60   IPIC   Level     serial
 17:          0   IPIC   Level     fpga
 18:          4   IPIC   Level     mpc83xx_spi
 21:          0   IPIC   Level     i2c-mpc
 22:          7   IPIC   Level     i2c-mpc

According to my platform device tree, serial irq should be on int9, SPI on int16 and i2c on int14,15.  This causes me some problems as I need int18 to map to external IRQ2.

Thanks for support.

Yann