Re: [PATCH 2/7] mfd: add mc34708 driver

["Eric Bénard" <eric@eukrea.com>]

Le Tue, 21 Feb 2012 14:03:18 +0100,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> a écrit :

> On 08:03 Tue 21 Feb     , Eric Bénard wrote:
> > Le Tue, 21 Feb 2012 04:48:35 +0100,
> > Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> a écrit :
> > 
> > > > +static struct mc34708 *mc_dev;
> > > > +
> > > > +struct mc34708 *mc34708_get(void)
> > > > +{
> > > > +	if (!mc_dev)
> > > > +		return NULL;
> > > > +
> > > > +	return mc_dev;
> > > > +}
> > > > +EXPORT_SYMBOL(mc34708_get);
> > > no please do not export the current as it will not alloe multiple chip on
> > > board
> > you can't have more than one of this chip on the board connected to 
> > the same CPU.
> except if you have 2 soc on the same board
> 
that's why I said "connected to the same CPU".
If you have 2 SOC, each SOC will have its own PMIC thus it's own
barebox, thus no problem.

> here you use it to detect the presence of the device where we can detect it by
> the presence of the dev file

in the future we will also use that to write to the PMIC (as done on
mx35-3stack for example).

Eric
-- 
http://eukrea.com/en/news/104-2012

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