diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cppc_cpufreq.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 3eaa23d1aaf5..bb4118cea2a0 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -389,6 +389,27 @@ static int cppc_cpufreq_set_target(struct cpufreq_policy *policy, return ret; } +static unsigned int cppc_cpufreq_fast_switch(struct cpufreq_policy *policy, + unsigned int target_freq) +{ + struct cppc_cpudata *cpu_data = policy->driver_data; + unsigned int cpu = policy->cpu; + u32 desired_perf; + int ret; + + desired_perf = cppc_cpufreq_khz_to_perf(cpu_data, target_freq); + cpu_data->perf_ctrls.desired_perf = desired_perf; + ret = cppc_set_perf(cpu, &cpu_data->perf_ctrls); + + if (ret) { + pr_debug("Failed to set target on CPU:%d. ret:%d\n", + cpu, ret); + return 0; + } + + return target_freq; +} + static int cppc_verify_policy(struct cpufreq_policy_data *policy) { cpufreq_verify_within_cpu_limits(policy); @@ -721,6 +742,8 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy) goto out; } + policy->fast_switch_possible = cppc_allow_fast_switch(); + /* * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost * is supported. @@ -866,6 +889,7 @@ static struct cpufreq_driver cppc_cpufreq_driver = { .verify = cppc_verify_policy, .target = cppc_cpufreq_set_target, .get = cppc_cpufreq_get_rate, + .fast_switch = cppc_cpufreq_fast_switch, .init = cppc_cpufreq_cpu_init, .exit = cppc_cpufreq_cpu_exit, .set_boost = cppc_cpufreq_set_boost, |