[alsa-devel] [PATCH 12/19] twl4030: mfd_cell is now implicitly available to drivers

[Mark Brown]

On Wed, Feb 02, 2011 at 11:03:26PM -0800, Andres Salomon wrote:
> Dmitry Torokhov <dmitry.torokhov at gmail.com> wrote:

> > Then they are doing it incorrectly. One possible way is to have parent
> > device carry relevant data in its drvdata and have children get it
> > from there.

> I believe some drivers are even using the parent device already.  See
> drivers/leds/leds-mc13783.c, for example, whose parent device drvdata
> is used to pass around a struct mc13783 to its children.  Sounds
> like a possibility, will need to look into it further.

That's the current best practice approach.