83 	struct _pid pid;  member
132 static inline void pid_reset(struct _pid *pid, int setpoint, int busy,  in pid_reset()  argument
134 	pid->setpoint = setpoint;  in pid_reset()
135 	pid->deadband  = deadband;  in pid_reset()
136 	pid->integral  = int_tofp(integral);  in pid_reset()
137 	pid->last_err  = setpoint - busy;  in pid_reset()
140 static inline void pid_p_gain_set(struct _pid *pid, int percent)  in pid_p_gain_set()  argument
142 	pid->p_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_p_gain_set()
145 static inline void pid_i_gain_set(struct _pid *pid, int percent)  in pid_i_gain_set()  argument
147 	pid->i_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_i_gain_set()
150 static inline void pid_d_gain_set(struct _pid *pid, int percent)  in pid_d_gain_set()  argument
153 	pid->d_gain = div_fp(int_tofp(percent), int_tofp(100));  in pid_d_gain_set()
156 static signed int pid_calc(struct _pid *pid, int busy)  in pid_calc()  argument
162 	err = pid->setpoint - busy;  in pid_calc()
165 	if (abs(err) <= pid->deadband)  in pid_calc()
168 	pterm = mul_fp(pid->p_gain, fp_error);  in pid_calc()
170 	pid->integral += fp_error;  in pid_calc()
174 	if (pid->integral > integral_limit)  in pid_calc()
175 		pid->integral = integral_limit;  in pid_calc()
176 	if (pid->integral < -integral_limit)  in pid_calc()
177 		pid->integral = -integral_limit;  in pid_calc()
179 	dterm = mul_fp(pid->d_gain, (err - pid->last_err));  in pid_calc()
180 	pid->last_err = err;  in pid_calc()
182 	result = pterm + mul_fp(pid->integral, pid->i_gain) + dterm;  in pid_calc()
189 	pid_p_gain_set(&cpu->pid, cpu->pstate_policy->p_gain_pct);  in intel_pstate_busy_pid_reset()
190 	pid_d_gain_set(&cpu->pid, cpu->pstate_policy->d_gain_pct);  in intel_pstate_busy_pid_reset()
191 	pid_i_gain_set(&cpu->pid, cpu->pstate_policy->i_gain_pct);  in intel_pstate_busy_pid_reset()
193 	pid_reset(&cpu->pid,  in intel_pstate_busy_pid_reset()
484 	struct _pid *pid;  in intel_pstate_adjust_busy_pstate()  local
488 	pid = &cpu->pid;  in intel_pstate_adjust_busy_pstate()
491 	ctl = pid_calc(pid, busy_scaled);  in intel_pstate_adjust_busy_pstate()