Bug Fix Patch export_user_gpios.patch for phyCARD-S PD10.2.0 (BSP002)
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In the phyCARD-S BSP PD10.2.0 PHYTEC supports expansion boards (PEB) for all phyCARDs.
The expansion boards contain support for a second Ethernet interface, CAN, and GPIO.
They use the GPIOs 95, 89 and 133 of the phyCARD-S. The GPIOs are requested 
by the kernel and not available for export in the userspace. With this patch the kernel 
explicit exports the GPIOs to userspace.


How do I apply the patch to my phyCARD-S PD10.2.0 BSP?
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1. Follow the instructions of the 'QuickStart Manual OSELAS.BSP() phyCARDs' Chapter 1
to set up the required working environment and Chapter 2 to build the phyCARD BSP.

2. Change to the main BSP folder
 cd OSELAS.BSP-Phytec-phyCORE-i.MX27-PD11.1.0

3. Copy the patch to the patch stack of the linux kernel
 cp /path/to/export_user_gpios.patch configs/phyCARD-S-2010.08.0/patches/linux-2.6.33.7/generic/

4. Add the Patch to the series file:
 echo export_user_gpios.patch >> configs/phyCARD-S-2010.08.0/patches/linux-2.6.33.7/generic/series

5. Clean the kernel and rebuild the Kernel with the patch.
 ptxdist-2010.08.0 clean kernel
 ptxdist-2010.08.0 targetinstall kernel

6. Now you find the new kernel with the bug fix included under:
 OSELAS.BSP-Phytec-phyCORE-i.MX27-PD11.1.0/platform-phyCARD-S/images/linuximage

Now update the kernel on your module.

Now you should see the GPIOs allready supported in the sysfs:

root@phyCARD:~ ll /sys/class/gpio/
/sys/class/gpio/export        /sys/class/gpio/gpiochip160/
/sys/class/gpio/gpio133/      /sys/class/gpio/gpiochip32/
/sys/class/gpio/gpio89/       /sys/class/gpio/gpiochip64/
/sys/class/gpio/gpio95/       /sys/class/gpio/gpiochip96/
/sys/class/gpio/gpiochip0/    /sys/class/gpio/unexport
/sys/class/gpio/gpiochip128/