On Thu, 2013-02-28 at 12:49 +0800, Mike Turquette wrote: > Dynamic voltage and frequency scaling (dvfs) is a common power saving > technique in many of today's modern processors. This patch introduces a > common clk rate-change notifier handler which scales voltage > appropriately whenever clk_set_rate is called on an affected clock.
I really think clk_enable and clk_disable should also be triggering notifier call and DVFS should act accordingly since there are cases drivers won't set clock rate but instead disable its clock directly, do you agree? > > There are three prerequisites to using this feature: > > 1) the affected clocks must be using the common clk framework > 2) voltage must be scaled using the regulator framework > 3) clock frequency and regulator voltage values must be paired via the > OPP library Just a note, Tegra Core won't meet prerequisite #3 since each regulator voltage values is associated with clocks driving those many sub-HW blocks in it. -- 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/
