On Sun, Apr 27, 2008 at 03:35:54AM -0700, Kevin Diggs wrote: > I'm working on a cpufreq driver for the 750GX so I don't think I have to > worry about being to platform specific. > > Would a compile time configuration be a good idea (hrtimer or > get_cycles() assisted timing)?
Save yourself the pain, and use the hrtimers infrastructure. > In the 2.4 code I just used a timer 2 ticks in the future to be certain > I did not go under the 100 us PLL lock delay. I was trying to see if I > could cut the latency down. > > What about using OF? Isn't there a timebase property for the cpus? Sure, If you really don't want to use the infrastructure that's there feel free to duplicate portions of arch/powerpc/kernel/time.c and kernel/time/* into your cpufreq driver. Yours Tony linux.conf.au http://www.marchsouth.org/ Jan 19 - 24 2009 The Australian Linux Technical Conference! _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
