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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/sa1110-cpufreq.c | |
| parent | 560c6e452d8fa1e98cc50674d3408924387a983e (diff) | |
| download | linux-rpi-fe829ed8ef1f3c7ac22843bd594ef2f6c4044288.tar.gz linux-rpi-fe829ed8ef1f3c7ac22843bd594ef2f6c4044288.tar.bz2 linux-rpi-fe829ed8ef1f3c7ac22843bd594ef2f6c4044288.zip | |
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/sa1110-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/sa1110-cpufreq.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/cpufreq/sa1110-cpufreq.c b/drivers/cpufreq/sa1110-cpufreq.c index 2bac9b6cfeea..66e5fb088ecc 100644 --- a/drivers/cpufreq/sa1110-cpufreq.c +++ b/drivers/cpufreq/sa1110-cpufreq.c @@ -306,13 +306,14 @@ static int sa1110_target(struct cpufreq_policy *policy, unsigned int ppcr) static int __init sa1110_cpu_init(struct cpufreq_policy *policy) { - return cpufreq_generic_init(policy, sa11x0_freq_table, CPUFREQ_ETERNAL); + return cpufreq_generic_init(policy, sa11x0_freq_table, 0); } /* sa1110_driver needs __refdata because it must remain after init registers * it with cpufreq_register_driver() */ static struct cpufreq_driver sa1110_driver __refdata = { - .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK, + .flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK | + CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING, .verify = cpufreq_generic_frequency_table_verify, .target_index = sa1110_target, .get = sa11x0_getspeed, |