Commits
Aaro Koskinen committed 45a428ebbf7
cpufreq: pmac64: speed up frequency switch Some functions on switch path use msleep() which is inaccurate, and depends on HZ. With HZ=100 msleep(1) takes actually over ten times longer. Using usleep_range() we get more accurate sleeps. I measured the "pfunc_slewing_done" polling to take 300us at max (on 2.3GHz dual-processor Xserve G5), so using 500us sleep there should be fine. With the patch, g5_switch_freq() duration drops from ~50ms to ~10ms on Xserve with HZ=100. Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>