[RFC] dt: export of_have_populated_dt

[Cousson, Benoit]

Hi Chris,

On 4/10/2012 6:21 PM, Chris Ball wrote:
> Hi,
>
> On Tue, Apr 10 2012, Cousson, Benoit wrote:
>> Hi Balaji,
>>
>> On 4/10/2012 5:11 PM, Balaji T K wrote:
>>> If of_have_populated_dt is called from module, build fails with "allnodes"
>>> undefined error, so remove inline and export of_have_populated_dt.
>>
>> Is this function really called from the MMC driver?
>
> ~/git/linux % git grep of_have_populated_dt drivers/
> drivers/gpio/gpio-samsung.c:    if (!of_have_populated_dt())
> drivers/mmc/host/omap_hsmmc.c:  if (of_have_populated_dt()&&  !vdd)
> drivers/mmc/host/omap_hsmmc.c:                   (!of_have_populated_dt())) {

Gosh, twice... I should be in a wrong branch :-(

Then the next question to Rob...

Rob,
Does it make sense to use that in the driver? So far I was using that 
only in the arch code to make the difference between the DT boot and the 
non-DT boot.

I guess that a driver should rely on of_match_device or non-NULL 
device_node to figure out that?

Thanks,
Benoit