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| author |   Jacob Tanenbaum <jtanenba@redhat.com> | 2015-11-19 10:29:01 -0500 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-12-10 00:17:03 +0100 |
| commit | 790d849bf811a8ab5d4cd2cce0f6fda92f6aebf2 (patch) | |
| tree | 73e897ae3f06324f78fe1d7b3c02d84bcc96a58f | |
| parent | cpufreq: arm_big_little: Add support to register a cpufreq cooling device (diff) | |
| download | linux-dev-790d849bf811a8ab5d4cd2cce0f6fda92f6aebf2.tar.xz linux-dev-790d849bf811a8ab5d4cd2cce0f6fda92f6aebf2.zip | |
cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency
The cpufreq documentation specifies
policy->cpuinfo.transition_latency the time it takes on this CPU to
switch between two frequencies in
nanoseconds (if appropriate, else
specify CPUFREQ_ETERNAL)
currently pcc-cpufreq does not expose the value and sets it to zero. I
changed the pcc-cpufreq driver and it's documentation to conform to the
default value specified in Documentation/cpu-freq/cpu-drivers.txt
Signed-off-by: Jacob Tanenbaum <jtanenba@redhat.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | Documentation/cpu-freq/pcc-cpufreq.txt | 4 | ||||
| -rw-r--r-- | drivers/cpufreq/pcc-cpufreq.c | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/cpu-freq/pcc-cpufreq.txt b/Documentation/cpu-freq/pcc-cpufreq.txt index 9e3c3b33514c..0a94224ad296 100644 --- a/Documentation/cpu-freq/pcc-cpufreq.txt +++ b/Documentation/cpu-freq/pcc-cpufreq.txt @@ -159,8 +159,8 @@ to be strictly associated with a P-state. 2.2 cpuinfo_transition_latency: ------------------------------- -The cpuinfo_transition_latency field is 0. The PCC specification does -not include a field to expose this value currently. +The cpuinfo_transition_latency field is CPUFREQ_ETERNAL. The PCC specification +does not include a field to expose this value currently. 2.3 cpuinfo_cur_freq: --------------------- diff --git a/drivers/cpufreq/pcc-cpufreq.c b/drivers/cpufreq/pcc-cpufreq.c index 2a0d58959acf..808a320e9d5d 100644 --- a/drivers/cpufreq/pcc-cpufreq.c +++ b/drivers/cpufreq/pcc-cpufreq.c @@ -555,6 +555,8 @@ static int pcc_cpufreq_cpu_init(struct cpufreq_policy *policy) policy->min = policy->cpuinfo.min_freq = ioread32(&pcch_hdr->minimum_frequency) * 1000; + policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; + pr_debug("init: policy->max is %d, policy->min is %d\n", policy->max, policy->min); out: |