From af671d8b2c2ace771e08566b20774cc08ee53316 Mon Sep 17 00:00:00 2001 From: Aaro Koskinen Date: Mon, 30 Sep 2013 23:44:32 +0300 Subject: cpufreq: pmac64: provide cpufreq transition latency for older G5 models Currently cpufreq ondemand governor cannot used on older G5 models, because the transition latency is set to CPUFREQ_ETERNAL. Provide a value based on a measurement on Xserve G5, which happens to be also the highest allowed latency. Signed-off-by: Aaro Koskinen Acked-by: Benjamin Herrenschmidt Signed-off-by: Rafael J. Wysocki --- drivers/cpufreq/pmac64-cpufreq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c index 889c0d553572..db9764e83668 100644 --- a/drivers/cpufreq/pmac64-cpufreq.c +++ b/drivers/cpufreq/pmac64-cpufreq.c @@ -627,8 +627,10 @@ static int __init g5_pm72_cpufreq_init(struct device_node *cpunode) g5_cpu_freqs[0].frequency = max_freq; g5_cpu_freqs[1].frequency = min_freq; + /* Based on a measurement on Xserve G5, rounded up. */ + transition_latency = 10 * NSEC_PER_MSEC; + /* Set callbacks */ - transition_latency = CPUFREQ_ETERNAL; g5_switch_volt = g5_pfunc_switch_volt; g5_switch_freq = g5_pfunc_switch_freq; g5_query_freq = g5_pfunc_query_freq; -- cgit v1.2.3