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Commit 790d849b authored by Jacob Tanenbaum's avatar Jacob Tanenbaum Committed by Rafael J. Wysocki
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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: default avatarJacob Tanenbaum <jtanenba@redhat.com>
Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 2f7e8a17

Documentation/cpu-freq/pcc-cpufreq.txt

+2 −2
Original line number Diff line number Diff line
@@ -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:

---------------------

drivers/cpufreq/pcc-cpufreq.c

+2 −0
Original line number Diff line number Diff line
@@ -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: