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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2017-07-19 15:42:48 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-26 00:15:46 +0200 |
| commit | fe829ed8ef1f3c7ac22843bd594ef2f6c4044288 (patch) | |
| tree | 2dedcb6914c8d28957e7488cbe337a7d9d021abe /drivers/cpufreq/speedstep-smi.c | |
| parent | 560c6e452d8fa1e98cc50674d3408924387a983e (diff) | |
| download | linux-fe829ed8ef1f3c7ac22843bd594ef2f6c4044288.tar.bz2 | |
cpufreq: Add CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING cpufreq driver flag
The policy->transition_latency field is used for multiple purposes
today and its not straight forward at all. This is how it is used:
A. Set the correct transition_latency value.
B. Set it to CPUFREQ_ETERNAL because:
1. We don't want automatic dynamic switching (with
ondemand/conservative) to happen at all.
2. We don't know the transition latency.
This patch handles the B.1. case in a more readable way. A new flag for
the cpufreq drivers is added to disallow use of cpufreq governors which
have dynamic_switching flag set.
All the current cpufreq drivers which are setting transition_latency
unconditionally to CPUFREQ_ETERNAL are updated to use it. They don't
need to set transition_latency anymore.
There shouldn't be any functional change after this patch.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/speedstep-smi.c')
| -rw-r--r-- | drivers/cpufreq/speedstep-smi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpufreq/speedstep-smi.c b/drivers/cpufreq/speedstep-smi.c index 37b30071c220..d23f24ccff38 100644 --- a/drivers/cpufreq/speedstep-smi.c +++ b/drivers/cpufreq/speedstep-smi.c @@ -266,7 +266,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy) pr_debug("workaround worked.\n"); } - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; return cpufreq_table_validate_and_show(policy, speedstep_freqs); } @@ -290,6 +289,7 @@ static int speedstep_resume(struct cpufreq_policy *policy) static struct cpufreq_driver speedstep_driver = { .name = "speedstep-smi", + .flags = CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = cpufreq_generic_frequency_table_verify, .target_index = speedstep_target, .init = speedstep_cpu_init, |