Dear LogicPD technical support,
I'm trying to build your Android Gingerbread GPIO demo as described in the AN 531 document.
I downloaded the sources from git.logicpd.com/gpio-demo.
When building the sources I found some errors in the scripts and sources, specifically:

gpio-demo/TestIgpio/deployToDevice.sh:
-- refers to froyo instead of gingerbread;

gpio-demo/TestIgpio/Android.mk:
-- the line "LOCAL_MODULE_TAGS := user eng" contains the "user" tag which generates the following error:
*** user tag detected on new module - user tags are only supported on legacy modules.

gpio-demo/igpio/deployToDevice.sh:
-- refers to wrong android-sdk directory for adb command;

gpio-demo/igpio/buildIgpio.sh:
-- refers to froyo instead of gingerbread;

gpio-demo/igpio/igpio.c:
-- should #include <linux/slab.h>
-- should #define init_MUTEX(sem) sema_init(sem,1)
-- refers to obsolete "ioctl" field in the struct file_operations (I changed this to "unlocked_ioctl")
-- [COULD NOT FIND WORKAROUND] calls the "void omap_mux_write(u16 offset, u16 val)" function.

Finally I was able to build the GPIO demo, but when trying to load the igpio driver, I got the following:
igpio: Unknown symbol omap_mux_write (err 0)
insmod: init_module '/data/local/tmp/igpio.ko' failed (No such file or directory)

I was able to find a workaround to all but the last error. I did a grep for the omap_mux_write function in the full gingerbread tree (downloaded from git.logicpd.com) and I only found a match in the file:
kernel/arch/arm/mach-omap2/mux.c
but the function has a different signature:
void omap_mux_write(struct omap_mux_partition *partition, u16 val, u16 reg)
I don't know how to pass the first argument to the function.

Please help, we really need the GPIO feature in out project.
Thanks in advance.
Domenico.