Daniel, On Mon, Jul 27, 2015 at 03:00:11PM +0100, Govindraj Raja wrote: > From: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxx> > > The purpose of this patchset is to support CPUFreq on Pistachio SoC. > However, given Pistachio uses the MIPS GIC clocksource and clockevent drivers > (clocked from the CPU), adding CPUFreq support needs some work. > > This patchset changes the MIPS GIC clockevent driver to update the frequency of > the per-cpu clockevents using a clock notifier. > > Then, we add a clocksource driver for IMG Pistachio SoC, based on the > general purpose timers. The SoC only provides four timers, so we can't > use them to implement the four clockevents and the clocksource. > > However, we can use one of these timers to provide a clocksource and a > sched clock. Given the general purpose timers are clocked from the peripheral > system clock tree, they are not affected by CPU rate changes. > > Patches 1 to 3 are just style cleaning and preparation work. > Patch 4 adds the clockevent frequency update. > Patches 5 and 6 add the new clocksource driver. > Patch 7 introduces an option to enable the timer based clocksource on Pistachio. if you're happy with this series feel free to add my ack to patch 7/7 which is the only one that touches arch/mips. Alternatively I can carry this in the MIPS tree which would have tbe benefit of better testing. Ralf
