From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Date: Wed, 01 Oct 2014 08:17:22 +0000 Subject: Re: [linux-sunxi] Re: [PATCH 4/4] simplefb: add clock handling code Message-Id: <20141001081721.GD18463@ulmo> MIME-Version: 1 Content-Type: multipart/mixed; boundary="sgneBHv3152wZ8jf" List-Id: 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> In-Reply-To: <20140930180036.GI4273@sirena.org.uk> To: linux-arm-kernel@lists.infradead.org --sgneBHv3152wZ8jf Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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. >=20 > 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 --sgneBHv3152wZ8jf Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBAgAGBQJUK7iRAAoJEN0jrNd/PrOhEyQP/Rz9WJzt3eY7iR3Lz95nnlwP Rg5S9Eacn/y7SBiZ6ePik4hRgFgjlPP/UpU8g/thTI6ISLoUd1KE93Ws0ZutFMDy hDpqMHwrX+TJsYnO/pccCP4xXcPOtjFyvVzjAQtDuYMWGXF5lQ44INel6mNGWRi6 hIsK4ZIlqhD4Zc7Rne945CtPV+D1bnArIeVmZHlIFynpfhgotDTf5LS6+esOPpuO Tc8U1Bka5z6E8QelprMFPGT45t+qZpOQLemC5m/tR7ak7eH34j8ngq4JxXqd6HI4 xONZVPtCucpAhj6LP5Zsmu1T2jeLuGsq5PR5kPw/WWdNLUF41LtXHFHsvvYK3uGM fqR9xdn68F5nQv/aFhww+BCHPhwtacRqnHLSjN42OMBcWWX9yL3zmk4so5jI/iPR mjnhCi/OqBMsczlkIXVtT9sRds0ESkJYgbkpIFLz7gLoXZZR0iDBHZDwUSLN6k2d zJOcpZBDf1Z1v3qXngVUt1d2wyX+rPndhT9NjZrOFq/o9SIGOhuiQbu71T8xvTcc et7XwCwdiEZGC5CuMGB6iOuN7BFzM2OHP9HB8MeZO5i3KDz6SSltJrPAnWUNUeUT If7qepgFUko3p9OlIR3QO6QnXT9zgdITb7uCoLYD5JHfYAYZTnf//x0y2kCdr4l8 RHzLnqIT1ZhveXKskWKV =kxjb -----END PGP SIGNATURE----- --sgneBHv3152wZ8jf--