Re: [microblaze-uclinux] GPIO as a Loadable module

["Steven J. Magnani" <steve@xxxxxxxxxxxxxxx>]

Hi Hugo,

I believe some of the Xilinx API functions are not present in
drivers/xilinx_common/xilinx_syms.c and so are not exported to modules.
I believe it is OK to add EXPORT_SYMBOL_GPL statements for the things
you need; I seem to recall that this was done in one of the Xilinx GIT
trees, but last I checked had not made it to the mainline kernel.

Regards,
------------------------------------------------------------------------
 Steven J. Magnani               "I claim this network for MARS!
 www.digidescorp.com              Earthling, return my space modulator!"

 #include <standard.disclaimer>

On Tue, 2009-10-13 at 16:21 -0400, Hugo Marchand wrote:
> Hi,
> 
>  
> 
> When I try to load “ xilinx_gpio.ko” , with insmod, there is the
> following unresolved symbols:
> 
>  
> 
> [42949666.150000] xilinx_gpio: Unknown symbol XIo_Out32
> 
> [42949666.160000] xilinx_gpio: Unknown symbol XAssertStatus
> 
> [42949666.170000] xilinx_gpio: Unknown symbol XIo_In32
> 
> [42949666.180000] xilinx_gpio: Unknown symbol XAssert
> 
>  
> 
> in the build process I have the following warnings:
> 
>  
> 
> WARNING: "XAssert" [drivers/char/xilinx_gpio/xilinx_gpio.ko]
> undefined!                        
> 
> WARNING: "XIo_In32" [drivers/char/xilinx_gpio/xilinx_gpio.ko]
> undefined!                       
> 
> WARNING: "XAssertStatus" [drivers/char/xilinx_gpio/xilinx_gpio.ko]
> undefined!                  
> 
> WARNING: "XIo_Out32" [drivers/char/xilinx_gpio/xilinx_gpio.ko]
> undefined!                      
> 
> make[2]: [__modpost] Error 1
> (ignored)                                                         
> 
>  
> 
>  
> 
> I am using the latest petalinux release (0.40-final) with Kernel 2.6
> on a MMu machine, and the gpio driver is working when linked
> statically into the kernel.
> 
>  
> 
> Question:
> 
> Is there something special to do in order to be able to use
> xilinx_gpio as a loadable module instead of a build-in driver ? 
> 
>  
> 
>  
> 
> Thanks
> 
>  
> 
>  
> 
> Hugo Marchand, B.Sc. Electrical Engineering
> 
> Software Engineer | Ingénieur Logiciel
> 
> Lyrtech
> 
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> 
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> 
>  
> 
>  
> 
> 
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