ppc405ex GPIO mapping

Cote, Sylvain Sylvain.Cote at verint.com
Tue Jun 23 01:13:41 EST 2009


I am using kernel on my Kilauea eval board (ppc405ex).  I want to access some GPIO's.  I have configured my u-boot to reflect what GPIO configuration I need.  I try to access my GPIO's in my driver.  When accessing GPIO's, I get this error in the kernel <<Unable to handle kernel paging request for data at address 0xef600800>>.   0xef600800 is the base address of GPIO in the ppc405ex.

It looks like GPIO's are not mapped in my kernel.  I have tried to add this entry in my dts file (under POB0: opb ) but it does not work:

GPIO: gpio at ef600800
compatible = "ibm,gpio-405ex";
reg = <ef600800 00000020>;

Any clues on this issues?


Sylvain C.

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