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cpufreq: Introduce governor flags

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A new cpufreq governor flag will be added subsequently, so replace
the bool dynamic_switching fleid in struct cpufreq_governor with a
flags field and introduce CPUFREQ_GOV_DYNAMIC_SWITCHING to set for
the "dynamic switching" governors instead of it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2020-11-10 18:25:57 +01:00
parent f8394f232b
commit 9a2a9ebc0a
4 changed files with 10 additions and 5 deletions
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2
drivers/cpufreq/cpufreq.c
View File

@ -2254,7 +2254,7 @@ static int cpufreq_init_governor(struct cpufreq_policy *policy)
return -EINVAL;
/* Platform doesn't want dynamic frequency switching ? */
if (policy->governor->dynamic_switching &&
if (policy->governor->flags & CPUFREQ_GOV_DYNAMIC_SWITCHING &&
cpufreq_driver->flags & CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING) {
struct cpufreq_governor *gov = cpufreq_fallback_governor();

2
drivers/cpufreq/cpufreq_governor.h
View File

@ -156,7 +156,7 @@ void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy);
#define CPUFREQ_DBS_GOVERNOR_INITIALIZER(_name_) \
{ \
.name = _name_, \
.dynamic_switching = true, \
.flags = CPUFREQ_GOV_DYNAMIC_SWITCHING, \
.owner = THIS_MODULE, \
.init = cpufreq_dbs_governor_init, \
.exit = cpufreq_dbs_governor_exit, \

9
include/linux/cpufreq.h
View File

@ -570,12 +570,17 @@ struct cpufreq_governor {
char *buf);
int (*store_setspeed) (struct cpufreq_policy *policy,
unsigned int freq);
/* For governors which change frequency dynamically by themselves */
bool dynamic_switching;
struct list_head governor_list;
struct module *owner;
u8 flags;
};
/* Governor flags */
/* For governors which change frequency dynamically by themselves */
#define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0)
/* Pass a target to the cpufreq driver */
unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
unsigned int target_freq);

2
kernel/sched/cpufreq_schedutil.c
View File

@ -881,7 +881,7 @@ static void sugov_limits(struct cpufreq_policy *policy)
struct cpufreq_governor schedutil_gov = {
.name = "schedutil",
.owner = THIS_MODULE,
.dynamic_switching = true,
.flags = CPUFREQ_GOV_DYNAMIC_SWITCHING,
.init = sugov_init,
.exit = sugov_exit,
.start = sugov_start,