hi everyone...

using char driver i could able to access gpio push buttons in at91sam9261-ek.but i have to use irq for and register a handler for accessing the keys.my question is how can i assign irq number and all other stuff to gpio pin?help me out....and thnx in advance...

regards,
kiran kumar sharma.

i have...done it..

Can you share what you did?

hi swinnenb,

In the BSP(from timesys),they have exported some functions(refer gpio.c) to access the status of the GPIO's.so i wrote a dummy char driver with a dummy device class,with which i have accessed the already exported kernel functions(i have statically linked the driver module with the kernel).In irq handler am just checking whether status of GPIO corresponding to the key is changed or not?if so,am registering a process context bottom-half(work-queue) for handling key press and release events(for handling the key debounce delay).....hope u got it...

regards,
kiran kumar sharma.