Andrew,

On Wed, 24 Oct 2012 22:01:28 +0200, Andrew Lunn wrote:

I guess it is too early to use gpio. I don't think the gpio driver has
not been configured yet.

I need to think about this.

What happens if you comment out these two gpio_set_value calls?

The problem is (probably, I haven't tested) that in
mach-kirkwood/board-dt.c, the of_platform_populate() function is called
after all the board-specific init. So all the devices described in the
DT, including GPIO banks, have not been registered yet. Most likely the
of_platform_populate() should come before the board specific inits.

Also there should probably  be a gpio_request() before those
gpio_set_value().

Best regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com