PXA 26x GPIO possible regression in kernel 3.3 and newer

Paul Parsons <lost.distance <at> yahoo.com> writes:

Hello Damian,

That sounds familiar. In 3.3 the number of PXA builtin GPIOs
(PXA_NR_BUILTIN_GPIO) was increased from 128 to 192.
Consequently the board GPIO numbers all increased by 64.
On the iPAQ hx4700 that had the effect of pushing EGPIO
numbers from 192-199 to 256-263, beyond the 256 maximum.

The fix is to set ARCH_NR_GPIO in arch/arm/Kconfig to a
higher maximum (for example, the iPAQ hx4700 sets 264).

Regards,
Paul

Thank you for taking your time to reply, Paul.
Yes, I remember reading about that change in kernel 3.3.
I tried almost every value that I thought may be correct
(but even the default 256 should be enough).
As I said, only the PXA GPIOs don't seem to work. 
Another strange thing is that I managed to read a line:
"NR_IRQS: 16 nr_irqs: 358" early on boot.
This is suspicious, because on kernel 3.2 and lower 
this is "NR_IRQS: 288 nr_irqs: 358".

I don't have any more ideas about that.