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authorDirk Brandewie <dirk.j.brandewie@intel.com>2014-02-12 10:01:05 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-03-02 00:35:19 +0100
commitd98d099b9fbb7bbb20a74efe5327322831c9c9a3 (patch)
tree3ea35bceded921d6f6099b6fda1930900fe91fb5 /drivers/cpufreq
parentd37e2b764499e092ebc493d6f980827feb952e23 (diff)
intel_pstate: fix pid_reset to use fixed point values
commit d253d2a526 (Improve accuracy by not truncating until final result), changed internal variables of the PID to be fixed point numbers. Update the pid_reset() to reflect this change. Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/intel_pstate.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 41f9eb295f0c..9ab109c0f90c 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -153,7 +153,7 @@ static inline void pid_reset(struct _pid *pid, int setpoint, int busy,
pid->setpoint = setpoint;
pid->deadband = deadband;
pid->integral = int_tofp(integral);
- pid->last_err = setpoint - busy;
+ pid->last_err = int_tofp(setpoint) - int_tofp(busy);
}
static inline void pid_p_gain_set(struct _pid *pid, int percent)