[linux-sunxi] Re: [PATCH 4/4] simplefb: add clock handling code

[Thierry Reding]

On Tue, Sep 30, 2014 at 07:00:36PM +0100, Mark Brown wrote:
> On Tue, Sep 30, 2014 at 08:03:14AM +0200, Thierry Reding wrote:
[...]
> > Of course as Geert pointed out in another subthread, taking this all the
> > way means that we have to disable all power management because the
> > firmware device may be sharing resources with other devices and which
> > therefore are not unused. That's a pretty strong argument and I don't
> > have a solution for that. It is only really a problem for cases where
> > the firmware virtual device isn't taken over by a proper driver at some
> > point, though.
> 
> Indeed, and we also run into trouble for things where we actually need
> to really turn off the resource for some reason (MMC has some needs here
> for example).

Perhaps an alternative would be to just keep power management going and
hope for the best. This may turn out not to be as much of a problem for
many SoCs or boards as people make it out to be.

Thierry
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