Re: [Gumstix-users] Problem loading kernel module for GPIO interrupt

[Dave H. <dhy...@gm...>]

Hi Andy,

> Anyway, I copied this file hello.ko over to the gumstix after I
> compiled it, using wget and I run
> insmod hello.ko
> insmod: cannot insert `hello.ko': Unknown symbol in module (-1): No
> such file or directory

Looking into asm/arch-pxa/irqs.h it would appear that IRQ_TO_GPIO_2_80
is now called IRQ_TO_GPIO_2_x

The only reference to set_GPIO_IRQ_edge that I found was in
include/asm/arch-ixp2000/gpio.h

It's failing to load because it can't find that symbol.

All of the sample code you've gotten is designed for the 2.4 kernel.
All of the interrupt handling has been changed in the 2.6 kernel. I
think that you want to do something like the following:

#include <asm/arch/pxa-regs.h>
#include <asm/irq.h>

#define GPIO_MY_FOO    62

#define MY_FOO_IRQ    IRQ_GPIO( GPIO_MY_FOO )

=09pxa_gpio_mode( 62 | GPIO_IN );

=09set_irq_type( MY_FOO_IRQ, IRQT_FALLING );

        request_irq( MY_FOO_IRQ, ... other args... );

You should also make sure that you call free_irq in your exit routine
or very bad things will happen if an irq comes along and your module
is unloaded.

--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/