Re: [Gumstix-users] Problem with omap3 pwm driver (Scott Ellis)

[Savas P. <sa...@dp...>]

Dear Dave,
Thank you for your immediate response. The image on my gumstix FE COM is the
2011-03-25-1619 stable image (with the omap3-desktop-nand-image-overo-booted
root file system and uImage), downloaded from the official gumstix web page
a few monthes ago. In my development PC I built, a few days ago with updated
git repositories, the omap3-console-image and so I found the
Angstrom-omap3-console-image-glibc-ipk-2011.03-overo.rootfs.tar.bz2 root
file system with uImage-3.0-r103-overo.bin and the other image files in the
temp/deploy/glibs/images/overo OE directory.

According to your diagnosis I should update the image on my gumstix FE COM
with the one I have at my development PC. Is that so?
Best Regards,
Savas


Dave Hylands wrote:
> 
> Hi Savas,
> 
> On Wed, Nov 2, 2011 at 8:49 AM, Savas Piperidis <sa...@dp...> wrote:
>>
>> Hello forum,
>> Yesterday I built an omap3-console-image using the OE environment and the
>> instructions from the Gumstix Developer web page. After that I cross
>> compiled the omap3 pwm driver ( https://github.com/scottellis/omap3-pwm
>> https://github.com/scottellis/omap3-pwm ). I got the following messages
>> during the cross compilation of the pwm driver:
>>
>> ...
>> savas@RobOfficeD1:~/Dropbox/PHD_DropBox/WEBOTS_C++/C_plus_plus/Libraries/Overo_PWM_Driver/scottelisPWMDriver/omap3-pwm$
>> make
>> make -C
>> /home/savas/overo-oe/tmp/sysroots/overo-angstrom-linux-gnueabi/kernel
>> M=/home/savas/Dropbox/PHD_DropBox/WEBOTS_C++/C_plus_plus/Libraries/Overo_PWM_Driver/scottelisPWMDriver/omap3-pwm
>> modules
>> make[1]: Entering directory
>> `/home/savas/overo-oe/tmp/sysroots/overo-angstrom-linux-gnueabi/kernel'
>>  CC [M]
>> /home/savas/Dropbox/PHD_DropBox/WEBOTS_C++/C_plus_plus/Libraries/Overo_PWM_Driver/scottelisPWMDriver/omap3-pwm/pwm.o
>>  Building modules, stage 2.
>>  MODPOST 1 modules
>>  CC
>> /home/savas/Dropbox/PHD_DropBox/WEBOTS_C++/C_plus_plus/Libraries/Overo_PWM_Driver/scottelisPWMDriver/omap3-pwm/pwm.mod.o
>>  LD [M]
>> /home/savas/Dropbox/PHD_DropBox/WEBOTS_C++/C_plus_plus/Libraries/Overo_PWM_Driver/scottelisPWMDriver/omap3-pwm/pwm.ko
>> make[1]: Leaving directory
>> `/home/savas/overo-oe/tmp/sysroots/overo-angstrom-linux-gnueabi/kernel'
> 
> Looks like it compiled and linked your module successfully.
> 
>> ...
>> Assuming that the compilation ended without any problems (?) I copied the
>> pwm.ko file to my Gumstix Tobi board. I used insmod to load the module,
>> following the instructions from, the above mentioned, Scott Ellis web
>> page.
>> Then I got the following error message:
>>
>> insmod: error inserting 'pwm.ko': -1 invalid module format
> 
> This means that the module wasn't compiled using the same set of
> parameters as the version of linux running on your gumstix.
> 
> Typically, it's because you didn't build the kernel using the same
> development environment that you used to build the module (so the
> development environment is probably setup for a newer kernel than the
> one running on your gumstix).
> 
> -- 
> Dave Hylands
> Shuswap, BC, Canada
> http://www.davehylands.com
> 
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