[PATCH v2 RESEND 2/3] cpufreq: pmac64: provide cpufreq transition latency for older G5 models
From: Aaro Koskinen <aaro.koskinen@iki.fi>
Date: 2013-09-30 20:45:19
Also in:
linux-pm
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
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 <aaro.koskinen@iki.fi> --- 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 46ae223..0196d60 100644
--- a/drivers/cpufreq/pmac64-cpufreq.c
+++ b/drivers/cpufreq/pmac64-cpufreq.c@@ -647,8 +647,10 @@ 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;
--
1.8.4.rc3