Re: issues calling of_platform_bus_probe() twice

On Sat, 17 Mar 2012 13:35:02 +0000, Tabi Timur-B04825 [off-list ref] wrote:

Grant Likely wrote:

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 >  Are you aware of any reason that we can't call of_platform_bus_probe()
 >  or multiple times.  Timur's run into an issue in which all devices
 >  don't get registered properly if we call of_platform_bus_probe() times
 >  with different of_device_id struct's.

 Nothing comes to mind... Grant ?

Neither for me.  Should work.

I posted a work-around patch here:

http://patchwork.ozlabs.org/patch/128533/

Without this patch, drivers cannot probe on DMA *channels*, or any other 
grandchildren of the root node.

That's because you're using it wrong.  of_platform_bus_probe() creates
platform devices at the starting level and every level below it as
described by the bus ids.  It is illegal to call of_platform_bus_probe()
twice at the same level in the DT.

g.