PXA 26x GPIO possible regression in kernel 3.3 and newer

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

--- On Fri, 27/7/12, Damian Czarnecki <dczarn@o2.pl> wrote:

From: Damian Czarnecki <redacted>
Subject: PXA 26x GPIO possible regression in kernel 3.3 and newer
To: linux-arm-kernel at lists.infradead.org
Date: Friday, 27 July, 2012, 16:10
Hello. This is my first post here. I
have a problem with GPIOs on my board (HTC 
Blue Angel PDA) with kernel versions 3.3 and newer.
This board has PXA 263 CPU, which has 89 GPIOs
and ASIC3 chip with GPIOs 192-255.
The problem is that on kernel 3.3+ I can't access PXA GPIOs
at all,
but the ASIC3 works.
Unfortunately, because of that I can't see whole kernel
output or post dmesg 
here,
because PXA? GPIOs are needed for SD Card,USB and many
more things.
But I caught a line "gpiochip_add: registered GPIOs 192 to
255 on device: asic3",
so it shows that? ASIC3 really is detected and works.
Other errors are "gpio-keys failed to request gpio 0 error
-22",
"tmio-mmc: probe of tmio-mmc failed with error -22".
With kernel 3.2 or older everything works. When requesting
PXA GPIOs, it fails.
Reading GPIOs hangs the system. I hope that somebody can
help me.
I know I haven't shown much info, but this is probably all I
can get now.


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