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cpufreq: pmac64: provide cpufreq transition latency for older G5 models

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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>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Aaro Koskinen 2013-09-30 23:44:32 +03:00 committed by Rafael J. Wysocki
parent 45a428ebbf
commit af671d8b2c
1 changed files with 3 additions and 1 deletions
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4
drivers/cpufreq/pmac64-cpufreq.c
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@ -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;