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ACPI / CPPC: set a non-zero value for transition_latency

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Compute the expected transition latency for frequency transitions
using the values from the PCCT tables when the desired perf
register is in PCC.

Signed-off-by: Prashanth Prakash <pprakash@codeaurora.org>
Reviewed-by: Alexey Klimov <alexey.klimov@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Prakash, Prashanth 2016-08-16 14:39:41 -06:00 • committed by Rafael J. Wysocki
parent 80b8286aee
commit be8b88d7d9
3 changed files with 46 additions and 2 deletions
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1
drivers/cpufreq/cppc_cpufreq.c
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@ -98,6 +98,7 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
policy->max = cpu->perf_caps.highest_perf;
policy->cpuinfo.min_freq = policy->min;
policy->cpuinfo.max_freq = policy->max;
policy->cpuinfo.transition_latency = cppc_get_transition_latency(cpu_num);
policy->shared_type = cpu->shared_type;
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)