tree 9dea7912efc8aa2036eec6c157403643a3e07f5a
parent abb6627910a1e783c8e034b35b7c80e5e7f98f41
author Hoan Tran <hotran@apm.com> 1476380015 -0700
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1476393041 +0200

cpufreq: CPPC: Correct desired_perf calculation

The desired_perf is an abstract performance number. Its value should
be in the range of [lowest perf, highest perf] of CPPC.
The correct calculation is
  desired_perf = freq * cppc_highest_perf / cppc_dmi_max_khz

And cppc_cpufreq_set_target() returns if desired_perf is exactly
the same with the old perf.

Signed-off-by: Hoan Tran <hotran@apm.com>
Reviewed-by: Prashanth Prakash <pprakash@codeaurora.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>