Re: [PATCH v4 7/9] ARM: sun7i/sun4i: dt: Add AXP209 support to various boards

[Carlo Caione <carlo-KA+7E9HrN00dnm+yROfE0A@public.gmane.org>]

On Fri, Apr 18, 2014 at 04:15:51PM +0100, Mark Brown wrote:
> On Thu, Apr 17, 2014 at 12:06:34PM +0200, Carlo Caione wrote:
> 
> > I'm fighting with a small issue when using the
> > regulator_bulk_register_supply_alias(). Problem is that when using the
> > .parent_supplies entry in the MFD driver, I hit the
> > 
> > WARN_ON(!list_empty(&dev->devres_head));
> > 
> > in linux/drivers/base/dd.c#L272, but, apart from the warning,
> > everything seems to work correctly.
> > A possible explanation I gave myself is that in the mfd_add_device()
> > we try to use the devm_* API when the regulator device is not bound to
> > the driver yet (I found some information here
> > http://lists.infradead.org/pipermail/linux-arm-kernel/2012-June/104442.html).
> > Is this the case?
> 
> Without knowing more about the case you're hitting it's hard to say - I
> do run a board which exercises the API for a MFD (with the arizona
> drivers) regularly and haven't noticed an issue so there must be
> something different about what you're trying to do.

I'm having a really hard time with this problem, so any hint is welcome
:) The small modification I'm using on top of the patches in this series
is here: http://bpaste.net/show/228330/

Unfortunately as I said I got this when booting:
http://bpaste.net/show/nUhUTzELT32v9HNPathL/

Thanks,

--
Carlo Caione