On Thu, Apr 25, 2013 at 02:27:32PM +0200, Laurent Pinchart wrote:
> On Thursday 25 April 2013 13:16:49 Mark Brown wrote:

> > Yes, this is commonly done with MFDs for example.

> I've had a quick look at the code, the regmap is passed through platform data 
> to the subdevices. With such an approach I could even pass the lock down to 
> the regulator driver (not that it would be a good idea of course).

Yes, or if the subdevice knows that its parent will always have a regmap
it can use dev_get_regmap() on the parent.