From mboxrd@z Thu Jan 1 00:00:00 1970 From: thierry.reding@gmail.com (Thierry Reding) Date: Wed, 1 Oct 2014 10:17:22 +0200 Subject: [linux-sunxi] Re: [PATCH 4/4] simplefb: add clock handling code In-Reply-To: <20140930180036.GI4273@sirena.org.uk> References: <53FF1D6C.6090205@redhat.com> <20140829070116.GC13106@ulmo> <20140829141244.GH15297@lukather> <20140829143812.GC31264@ulmo> <20140902092508.GR15297@lukather> <20140927235601.19023.31593@quantum> <20140929080637.GB12506@ulmo> <20140929161101.GS16977@sirena.org.uk> <20140930060312.GE29874@ulmo> <20140930180036.GI4273@sirena.org.uk> Message-ID: <20141001081721.GD18463@ulmo> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 819 bytes Desc: not available URL: