Using uio_dmem_genirq with device tree

Using uio_dmem_genirq with device tree

[Greg Anders]

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Hello all,
 

 
I am trying to figure out how to use the uio_dmem_genirq driver with a platform device described in my device tree
 
   
My device tree entry looks something like this:
 

 
       mydevice: mydevice@a0001000 {
 
               compatible = "generic-uio";
 
               ...
 
       }
 

 
And in my bootargs I have
 

 
       uio_dmem_genirq.of_id="generic-uio"
 

 
This works when using uio_pdrv_genirq but not when using uio_dmem_genirq. By "works" I mean that with uio_pdrv_genirq I see my device mapped under /sys/class/uio, but there is no such mapping with uio_dmem_genirq.
 

 
Looking at the source for the drivers, I notice that the uio_pdrv_genirq driver has the following lines that are not included in uio_dmem_genirq:
 

 
       module_param_string(of_id, uio_of_genirq_match[0].compatible, 128, 0);
 
       MODULE_PARAM_DESC(of_id, "Openfirmware id of the device to be handled by uio");
 

 
Do these lines need to be included for the uio_dmem_genirq driver to work?
 

 
I have read through the Userspace IO HOWTO but that guide doesn't cover using the generic UIO drivers with the device tree (as far as I can tell, I am a kernel newbie after all).
 

 
Thank you for your help,
 

 
Greg
     

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