On Friday, November 22, 2013 06:22:52 PM Viresh Kumar wrote: > On 22 November 2013 18:07, Rafael J. Wysocki <r...@rjwysocki.net> wrote: > > On Friday, November 22, 2013 04:59:49 PM Viresh Kumar wrote: > >> Some platforms might want to change frequency before suspending governors. > >> Like: > >> - Some platform which want to set freq to max to speed up > >> suspend/hibernation > >> process. > >> - Some platform (like: Tegra or exynos), set this to min or bootloader's > >> frequency. > >> > >> This patch adds an option for those, so that they can specify this at call > >> to > >> ->init(), so that cpufreq core can take care of this before suspending > >> system. > >> > >> If this variable is not updated by ->init() then its value would be zero > >> and so > >> core wouldn't do anything. > >> > >> Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org> > > > > I don't think this is generally necessary, because the suspend/resume > > routines > > added by patch [1/2] will be executed very late during suspend or very early > > during resume and it shouldn't really matter what performance levels the > > CPUs > > are at then. > > There are few things here: > - I feel that the current place from where we have suspended stuff is not > gonna > fly. We are doing that in noirq and probably devices which might be required > during frequency transitions might already be down.. So we *may* need to > move that in dpm_suspend()..
That would be a much more intrusive change. Definitely not 3.13 material at this point. Thanks! -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
