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GPIO on MPC8308ERD board

Question asked by ismaelfaye on Sep 25, 2012
Latest reply on May 15, 2013 by lunminliang

Hi all,

I am using MPC8308erdb board and right now I want to have futher information about the GPIO in the CPU. What I want to do, is to access (write and read) the GPIO registers, to enable interruption... But I am confused when I look at the source code of the BSP and I guess you will help me.


My question is How is the GPIO handled by the drivers in the kernel? where is the GPIO driver defined? in which file? I ask these questions because I am a bit confuse. I see in the source code that we have ../drivers/gpio/gpiolib.c and we also have ../arch/powerpc/sysdev/mpc8xxx.c... And the question is which one must be used to handle the GPIO on MPC8308erdb board.

And can you explain me how to manage the GPIO? What I have to do, to change in the source code? Which driver do I have to use?


Thank you in advance.

Best regards,

Ismael FAYE