[RFC 1/4] libnvdimm: add to_{nvdimm,nd_region}_dev()

[Dan Williams]

On Mon, Jul 10, 2017 at 9:38 PM, Oliver <oohall at gmail.com> wrote:
> On Tue, Jul 11, 2017 at 9:53 AM, Dan Williams <dan.j.williams at intel.com> wrote:
>> On Tue, Jun 27, 2017 at 3:28 AM, Oliver O'Halloran <oohall at gmail.com> wrote:
>>> struct device contains the ->of_node pointer so that devices can be
>>> assoicated with the device-tree node that created them on DT platforms.
>>> libnvdimm hides the struct device for regions and nvdimm devices inside
>>> of an opaque structure so this patch adds accessors for each to allow
>>> the of_nvdimm driver to set the of_node pointer.
>>
>> I'd rather go the other way and pass in the of_node to the bus and
>> dimm registration routines. It's a generic property of the device so
>> we should handle it like other generic device properties that get set
>> at initialization time like 'attr_groups' in nvdimm_bus_descriptor, or
>> a new parameter to nvdimm_create().
>
> Sure. I just figured it would be preferable to keep firmware specific
> details inside the firmware driver rather than adding #ifdef CONFIG_OF
> around the place. Do you have any objections to making nvdimm_create()
> take a descriptor structure rather than adding a parameter?

I don't see why we need "#ifdef CONFIG_OF". It's just a "struct
of_node *" pointer that can be forward declared as "struct of_node;"
we don't need the full definition.

Yes, I'm fine with converting nvdimm_create() to a take a descriptor,