On Tue, 9 Oct 2001, Philip Jones wrote:
> In writing a kernel module for an SA-1110 based system I attempt to access
> GPIOs by calling 'GPDR |= GPIO_GPIO(#)' to set the direction register, but
> this results in "Unable to handle kernel paging request at virtual address
> 90040004". Could I be forgetting to do something to prepare the kernel for
> that type of memory access? If anyone knows where some good documentation on
> the subject is located, or can explain the process of accessing the GPIOs in
> such a manner, it would be much appreciated.
Your example is correct. But you definitively miss something else.
Could you append your .c file?
Nicolas
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