[RFC] early init and DT platform devices allocation/registration

[Grant Likely]

On Wed, Jun 26, 2013 at 7:00 AM, Hiroshi Doyu <hdoyu at nvidia.com> wrote:
> Grant Likely <grant.likely at secretlab.ca> wrote @ Tue, 25 Jun 2013 19:52:33 +0200:
>
>> > Here's my workaround. I need to call of_detach_node() with OF_DYNAMIC
>> > to avoid duplicated device registration.
>>
>> Gah! my eyes!
>>
>> Don't do that. It is incredibly problematic. Look at inhibiting
>> duplicate device creation instead.
>
> I may not follow this thread correctly, but could anyone point out the
> above "inhibiting duplicate device creation" if there's already such
> solution?

No, the solution doesn't exist yet, but it wouldn't be hard to
implement. What you need to do is to add a struct device pointer to
struct device_node, and set the pointer to the struct device when
of_platform_device_create creates a device. (it would also need to be
set for early_platform_device creation, but that's not something that
should affect you). You would also add a check to
of_platform_device_create to check if the device pointer is already
set. If it is, then skip creation of the device.

g.